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    • 专利摘要:
    Process for the production of organic urea that, preferably from the mixture and reaction between ammonia (nh3) preferably gaseous and carbon dioxide (co2) in phases of formation of carbamate (5) of ammonium, degradation of carbamate (7), synthesis of urea (8) and evaporation (9) thereof, is carried out from organic ammonia of biomass (2) animal and vegetable and carbon dioxide recycled from gases (6) of bio-gas boilers with vegetable biomass, comprising previous stages of methanation (1), with biomass "digester" mixing slurry and blood of pig and chicken, leaves and ashes of pinasse, and water, until obtaining: methane gas, air, gaseous ammonia and water vapor and ph and catalysis regulator (3), where the gases obtained are condensed by cooling and gaseous ammonia is separated to store it at 13 atmospheres. The invention also claims the chemical reactor aus32 (adblue {reg}) manufactured from urea made from biomass. (Machine-translation by Google Translate, not legally binding)
    公开号:ES2573717A1
    申请号:ES201530983
    申请日:2015-07-08
    公开日:2016-06-09
    发明作者:Roberto ESTEFANO LAGARRIGUE
    申请人:Roberto ESTEFANO LAGARRIGUE；
    IPC主号:
    专利说明:

    PROCEDURE FOR THE PRODUCTION OF ORGANIC UREA As well as ORGANIC UREA AND AUS32 OBTAINED BY THIS 5 PROCEDURE.
    OBJECT OF THE INVENTION
    The invention, as expressed in the present specification, refers to a process for the production of urea
    organic as well as organic urea and AUS32 obtained by this
    process. The AUS32 product is the name of a urea solution at
    15 32.5% (Aqueous Urea Solution in English)
    The object of the present invention focuses specifically on a process for the production of organic urea, which is innovatively carried out from biomass as raw material,
    20 specifically, from the ammonia (NH3) of biomass of vegetable and animal origin, mixing it with the carbon dioxide (CO) recycled from the exhaust gases of a combined cycle Bio-gas boiler (gas-solids) with Vegetable biomass, to form an intermediate compound, which is what will produce organic urea.
    FIELD OF APPLICATION OF THE INVENTION
    The field of application of the present invention is part of the industry sector dedicated to the manufacture of chemical products, 30 fertilizers and domestic effluent treatment plants and
    industrial, particularly focusing on the scope of organic urea production, compost, irrigation water, reduction of effluents and gases that produce the greenhouse effect. 5 BACKGROUND OF THE INVENTION
    As is known, urea is a colorless and crystalline chemical compound of
    formula CO (NH,) ,. It is found abundantly in urine and fecal matter. It is the main terminal product of the metabolism of
    10 proteins in man and other mammals. Human urine contains about 20g per liter. In smaller quantities, it is present in the
    blood, liver, lymph and serous fluids and also in the
    Fish droppings and many other animals. It is also found in the heart, in the lungs, bones, in the organs
    15 reproductive (semen), fungi, legumes and cereals.
    Urea currently serves as a raw material for the formation of livestock feed, agricultural fertilizers, moisturizers and
    such as AUS32 (AdBlue ®) which is a chemical reactor for the degradation of nitrous oxide in the exhaust gases generated basically by
    internal combustion engines. Obtaining said compound at the industrial level will be conditioned by the formation of carbamates, in
    any of its raw materials (Biomass and / or Hydrocarbon Gas)
    25 The use of urea and phosphate fertilizers allows plantations to become stronger and can cope, with the help of the necessary agrochemicals, with different types of insects, bacteria and viruses that may affect them for as long as
    last the ripening of its fruits.
    The use of urea within systems operating with SeR
    (Selective Catalytic Reduction) as the main component in the chemical reactor AUS32 (AdBlue ®) (urea and distilled water) allows a significant decrease in the emissions generated by the gases of
    5 exhaust of internal combustion engines, mobile and stationary.
    Organic urea, also known as carbamide, carbonyldiamide or
    Carbamidic acid, is the name of the carbonic acid of di amide, whose chemical formula is (NH,) 2CO.
    On the other hand, urea synthesis is known on an industrial level (based on
    hydrocarbons) and is made from the cracking of the gas to obtain ammonia (NH,) liquid and carbon dioxide (CO,) gas. With sayings
    Mixed components form an intermediate product called ammonium carbamate, which, in turn, dehydrates to form urea.
    Specifically, the complete process of "traditional production" of urea a
    industrial level, that is, the one applied so far, can be carried out according to the following stages:
    -Getting CO.-Getting ammonia-Carbamate training-Degradation of carbamate and recycling
    25 - Urea synthesis - Dehydration, concentration and granulation.
    - Obtaining CO. CO is obtained from natural gas, through
    reaction known as reforming.
    Before reforming, the impurities of the gas, such as
    drops of oil, dust particles, and especially desulfurize the gas, since
    Sulfur interferes with the action of the catalysts.
    5 After purifying the gas, CO2 is obtained by two
    stages of catalytic reforming with water vapor. The heat needed to
    the reaction, which is endothermic, comes from the combustion of the gas
    natural and partially reformed gases. Air is allowed to enter
    reactor to obtain the necessary ratio of H2 / N2 for subsequent
    10 obtaining ammonia. The reaction is as follows:
    2 CH, + 3 H, OR 7 CO + CO, + 7 H,
    The two stages of reforming are verified according to the reaction described, and at
    After the exit of the second stage, a gas is obtained with the following proportions: 56% H "12% CO, 8% CO" 23% N, and less than 0.5% CH ,.
    To remove the ca and convert it into C02, the conversion of ca is performed by causing it to react catalytically with water vapor to form 20 CO, and H, using iron and copper as catalysts.
    CO is separated from the resulting gas by means of a mono solution
    ethanol amine (MEA), by the following reaction:
    25 MEA (CO,) 7 MEA + CO,
    Compression of carbon dioxide. The resulting dioxide is sent to two successive stages of compression in which the pressure rises to
    160 absolute atmospheres Small amounts are added to the dioxide
    30 air passively to inhibit the corrosive action.
    - Obtaining Ammonia After methane, the circulating gas is composed of air, methane and water vapor, which react with
    iron catalyst to form ammonia in a gaseous state according to:
    57 CH, + 10 H, O + 8 N, + 2 O, 716 NH3 + 7 CO,
    The gaseous ammonia condenses on cooling and separates from the gas to store it under pressure of about 13 atmospheres. The remaining gaseous ammonia 10 is recirculated to the synthesis loop.
    - Synthesis of urea. -The reaction is carried out at high pressures (200 bar) and the optimum thermal level (190'C) in a steel built reactor
    special stainless The reaction occurs between ammonia, CO2 and the recycled carbamate solution, from the absorption stage. He
    Ammonium Carbamate is formed from CO, and NH3 according to the following
    reaction (this reaction generates heat):
    2NH3 + CO, 7 NH, CO, NH, 20 LlH = -117 kJ / mol
    Ammonia + Carbonic Gas 7 Ammonium Carbamate
    Before entering the reactor, CO is compressed up to 200 atm, 25 by an electric compressor and ammonia up to 145 atm.
    NH3 and CO react quickly and exothermically, in one stage
    first, to form the carbamate, which is then dehydrated to urea + water. This reaction achieves about 100% under normal conditions.
    - Granulation. Then it goes to the pearl of Urea (formation of small pearls of the order of 2 -4 mm in diameter) is performed in the Pearl Tower (Prilling Tower).
    The molten urea is pumped to the top of the tower 80 meters high and 16 meters high. diameter. Through a rotating basket with about 6000
    Small pertorations are able to obtain a rain of molten Urea, whose drops are solidifying first and then cooling during their free fall, while circulating air in the opposite direction through large fans located at the top of the tower.
    In this way the final product is obtained, at about 40 -50 oC of
    temperature, which is transported by elevators and belts to
    15 storage silos.
    EXPLANATION OF THE INVENTION
    The procedure for the production of organic urea that presents it
    20 proposed invention is configured instead as a remarkable
    novelty within its field of application, providing advantages and characteristics that distinguish it and improve it with respect to the known procedure described, which are conveniently included in the final claims that accompany this report
    25 descriptive.
    It should be mentioned, first of all, that the preparation of urea at the industrial level, both from a hydrocarbon and from a biomass, is
    elaborates the mixture and reaction between the liquid ammonia (NH3) and the
    30 carbonic anhydride (C02) gas. The reaction is verified in two stages
    (common for both raw materials):
    In the first stage, the mixed components form the carbamate of
    ammonium.
    In the second stage, the ammonium carbamate dehydrates to form
    urea. The reaction rates are different. The first stage is much faster than the second stage, whereby the intermediate carbamate is
    10 accumulates. In addition, the first reaction is not completely verified, so
    that ammonia and dioxide are also free. In addition to this, you must
    mention that carbamate is a highly corrosive product, so
    which, what is done is to degrade the part of carbamate not converted to
    urea in its reagents of origin, and then re-form it.
    In addition, the first reaction is exothermic, and the second is endothermic.
    An important problem in this process is that in the second step of the
    reaction, a product called "biuret" is formed, which results from the union
    20 of two urea molecules with loss of one ammonia molecule.
    This product is undesirable because it is a toxic. For this reason its elimination is necessary.
    As for raw materials, however, the differences are
    25 important to keep in mind. The raw materials involved in the
    Organic urea production based on biomass are:
    1. the "Organic Ammonia" (NH3) of origin
    30 • animal, such as pig feces (slurry), avian,
    cattle, wool, the blood of these animals cited, the
    peels or organic components thereof such as viscera, or
    5 • Vegetable such as Mediterranean pineapple, tree leaves andshrubs, vegetables, fruits, or other componentsderived from forests such as barks or pine nuts.
    2. the carbon dioxide (C02) obtained for example from the gases of
    10 escape from the boilers of the steam generators of the Bio-gas plants and those produced by the calorific use of plant biomass,
    to form the inlennedium ammonium carbamate compound, which is the
    15 that urea will produce, according to the following scheme:
    2NH3 (Digester Ammonia) + C02 (Caldera Carbon Dioxide) ~ 7 C02 (NH2) 2 + H, O (Urea + Distilled Water)
    On the other hand, the raw materials involved in the production of hydrocarbon-based urea are: the "Ammonia" (NH,) from the cracking of the "reformed gas" (cracking-breaking of the CH4 molecules) (Hydrocarbons) and 25 the carbon dioxide (Ca,) from natural gas, through the reaction known as reforming. Combined these two elements occurs
    urea
    After establishing the premises described, the procedure for
    production of organic biomass based urea, object of the present
    The invention comprises the following steps:
    Methane stage: The first thing is to load in a "digester" of biomass a mixture formed by: "pig purines, pig blood,
    chicken manure, chicken blood, pinnace leaves (acts as a pH regulator), pinnace ashes (acts as a pH regulator) and water "° 10 any of the other human / animal plant biomass!
    previously described. This mixture is heated externally to accelerate and produce a chemical reaction that allows obtaining: methane gas, air, ammonia preferably in a gaseous state and water vapor.
    Catalysis stage: The mass of gases obtained in the stage
    above, they are condensed by cooling and the ammonia gas is separated for storage at a pressure of 13 atmospheres. The preferably remaining gaseous ammonia is recirculated to the synthesis loop.
    20 Carbamate formation stage: The urea synthesis reaction is carried out at high pressures (200 bar) and the optimum thermal level (190 'C) in a special stainless steel reactor.
    25 In said reactor, the exhaust gases from the boiler of the methane turbine + vegetable fuel are introduced and mixed with the ammonia
    preferably gas.
    2NH, + CO, ~ NH, CO, NH, t.H = -117 kJ / mol
    Ammonium carbamate is produced between CO2 and NH3 causing an exothermic reaction.
    5 The components CO, and NH3 react quickly and exothermically in
    a first stage, to form carbamate, which is then dehydrated to form urea + water.
    - Carbamate degradation stage: Not all ammonium carbamate breaks down into urea + water. The fraction that decomposes to form urea in relation to the total amount is called: uConversion "
    Conversion is in the order of 70%. That is, every 100 kg of
    Carbamate that form, only 70 kg become urea. The rest must be permanently recycled continuously to achieve total conversion.
    Since carbamate forms much faster than urea, and being a highly corrosive product, its handling is very difficult. For this reason
    20 what must be done is to degrade it again to NH3 and CO, and then re-form it.
    Said degradation is preferably carried out, as it is more economical,
    through the stripping of the ammonia, moving the reaction towards the products that form it. By lowering the reagent partial pressure, the system reacts to equilibrium by degrading the
    carbamate
    - Urea synthesis stage: Carbamate is dehydrated to urea by
    30 the reaction:
    NH, -eOONH4 (1) -7 NH, -eo -NH, (I) + H, O (1) "'H: +15.5 kJ / mol
    5 This is an endothermic reaction. The kinetics of the reaction increases with
    the temperature (the one generated by the boiler can be used), increasing the NH: ¡/ eO ratio, and decreasing the presence of water.
    Urea production is achieved in a vertical reactor, which operates at 188
    10 -190 oC and 160 Kgf / cm 'absolute, an N / e ratio of 3.6 -3.8, a
    approximate residence time at 45 minutes and a degree of
    conversion (in one step) from 65 to 70%.
    One of the options to optimize the process is to perform operations
    15 combined for the formation of carbamate (exothermic and rapid) in the
    lower part of said reactor by feeding excess C02 and NH3 and decomposition of the carbamate into urea (much slower and
    endothermic).
    20 This stage is essential to reduce the biuret, having to reach a concentration of 80% urea.
    Biuret is formed when two urea molecules bind releasing an ammonia molecule:
    25 2 NH, -eo -NH, -7 NH, -eo -NH -eo -NH, + NH,
    It is a highly toxic substance for plants and
    inconvenient for use in products to reduce emissions from
    30 nitrogen oxides, such as the chemical reactor AUS32 (AdBlue®). For
    lowering its concentration in values lower than 0.35% must achieve an excess of ammonia in the synthesis of urea (therefore preferably, combined biomass of animals and vegetables are used). This is
    It can be achieved by a vacuum concentrator which is heated 5 (by applying external heat) using the residual water vapor of the
    steam generator. This method is called synthesis urea which, once achieved, is pumped to an evaporation unit.
    - Evaporation Stage: The current from the concentrator is still concentrated in two evaporation stages, the first one (it is
    it concentrates up to 95%) operating at 0.3 kg / cm 'absolute and the second (concentrates up to 99.8%) at a very high vacuum, to achieve
    evaporation of water without thermally decomposing urea. A large ejector must be used to achieve the required vacuum levels.
    This results in molten urea at 132 ° C with a very low water content (approx. 0.5%).
    20 This stream can be sent to a Prilling Tower or granulation, for the formation of urea beads.
    As noted in previous sections, urea has multiple
    applications and uses, so it is an interesting product and of 25 great possibilities for its industrial production, although, in the case of organic biomass urea the possibilities of use and advantages are
    much older.
    Due to its high nitrogen content, commercially prepared urea is used in the manufacture of agricultural fertilizers, such as
    stabilizer in carbon-cellulose explosives or as a basic component of synthetically prepared resins. It is also used in feed for ruminants as a food supplement. In dermatology it is also used as a natural moisturizer. It is present in
    adhesives, plastics, resins, inks, pharmaceuticals and finishes 5 for textiles, paper and metals.
    On the other hand, the positive socio-economic impacts of this re
    Engineering in the manufacture of organic urea in the industry are obvious:
    Fertilizers are critical to achieve the level of agricultural production 10 necessary to feed the rapidly growing world population.
    One of the advantages derived from the procedure is therefore the optimization
    of manure factories and effluent treatments existing in Spain and
    15 other parts of the world originally intended as Bio-Gas factories
    or waste treatment for electric power generation.
    Specifically, the organic biomass urea production process allows multiple actions to be carried out in said factories such as:
    - Activate the generation from the same production farm of the Purines of ammonia.
    25-Encourage their generation during the transfer farm-factory of 8ioGas.
    - Modify the current digestion reactor in order to optimize the biological processes (described above) to obtain: 30 Methane gas (electricity generator) and organic biomass urea.
    - Modify the exhaust gas outlet of the steam boiler,
    redirecting it to the digester for the use of all carbon dioxide that is currently expelled into the atmosphere, use
    the temperature of the exhaust gases to increase the times of
    digestion in the generator and in the chain processes of obtaining ammonia, the formation of carbamate, its decomposition, the
    urea synthesis, biuret phonation, concentration and5 Evaporation (all these processes have been explained above).
    - In addition to using a closed gas circuit that allows the recovery of harmful gases such as ammoniacal nitrogen, which are currently discharged into the atmosphere, fulfilling and improving the
    imposed by the current nonmative of the RCCDE for the post 2012 period.
    - Generate a final campaign with a very low ammonia content for
    its use as an active field, not harmful to the environment
    15 environment.
    - Use the plant biomass that is generated, minimizing the risk of forest fires and generating hand needs
    of work and technification for its collection and transfer to the plants of
    20 Bio gas treatment.
    - Use as raw material to obtain ammonia the blood of the animals (depending on their Size Size) currently used
    mainly as raw material for flour of animal origin
    25 (one of the main causes of the disease known as:
    "Bovine Spongiform Encephalopathy or Mal de la Vaca Loca".
    - Eliminate environmental pollution in the effluents of slaughterhouses of all kinds (Lanar, Beef, Pigs, Poultry, etc.).
    - Use the organic biomass urea obtained as a component
    fundamental in the elaboration of the chemical reactor AUS32 (AdBlue®).
    organic which is an element that reduces nitrous oxide emissions produced by the exhaust gases of vehicles, homes, industries,
    etc.
    In short, the procedure is a great advantage in terms of
    contribution of indirect positive impacts to the natural environment that come from the proper use of plant biomass and
    animals; In addition the manufacture of fertilizers on an organic basis allows
    10 intensify agriculture on existing land, reducing
    need to expand it to other lands that may have uses
    Natural or social different.
    In addition, the negative environmental impacts are substantially reduced
    15 that of hydrocarbon-based fertilizer production are usually
    severe. Wastewater is not a problem. Having been
    treated as part of the process are slightly acidic (depending on the type of plant), and its toxic substance content is minimal (concentrations of: ammonia or ammonium compounds, urea,
    20 cadmium, arsenic, fluorides and phosphate).
    Water treatment as an active agent in the manufacture of urea
    Organic is the reason why its effluents, total suspended solids, organic nitrate and nitrogen, phosphorus, potassium, and (as a result), are within the normal parameters for fertigation in OSO (biological oxygen demand) and COD (chemical demand of oxygen).
    The process of obtaining organic urea prevents contamination
    currently produces known as "eutrophication of surface water or nitrogen pollution of groundwater."
    DESCRIPTION OF THE DRAWINGS
    To complement the description that is being made and in order to help a better understanding of the characteristics of the invention,
    5 accompanies the present specification, as an integral part of the
    same, a plane in which the following has been represented by way of illustration and not limitation:
    Figure 1 and unique. - Shows, by means of a block diagram, a diagram of the steps of the process for the production of organic urea, object of the invention.
    PREFERRED EMBODIMENT OF THE INVENTION
    15 In view of the described figure 1 and only, and according to the numbering
    adopted therein, it can be seen how the process for the production of organic urea proposed by the invention comprises the following steps:
    20 - Methane stage (1): that in a "digester" of biomass is mixed
    animal and plant biomass (2) formed by: pig upurines, blood of
    Pork, chicken purines, chicken blood, pinnace leaves (acting
    as a pH regulator), pinnace ash (which acts as a pH regulator), and water "which is heated externally to obtain: methane gas, air, ammonia in the gaseous state and water vapor.
    - Catalysis stage (3), where the mass of gases obtained in the stage
    above, they are condensed by cooling and the ammonia gas is separated for storage at a pressure of 13 atmospheres. Gaseous ammonia
    30 remaining (4) is recirculated to the synthesis loop.
    Urea synthesis is performed from liquid ammonia (NH3) and
    carbonic anhydride (CO,) gas. The reaction is verified in 2 steps.
    In the first step, the reagents mentioned form a product
    intermediate called ammonium carbamate and, in the second stage, carbamate dehydrates to form urea.
    - Carbamate Formation Stage (5)
    In said reactor the exhaust gases (6) of the boiler of the
    methane turbine + vegetable fuel and mixed with ammonia
    10 gas.
    Ammonium carbamate is produced between CO, and NH3 producing a
    exothermic reaction 15 2NH3 + CO, 7 NH, CO, NH, 6H = -117 kJ / mol
    The CO2 and NH3 components react quickly and exothermically in a first stage, to form carbamate, which then in a second stage is dehydrated to form urea + water in an endothermic reaction. Carbamate formation takes place in two phases.
    A problem arises since the reaction rates are different: the first stage is much faster than the second, with
    25 which intermediate carbamate accumulates. In addition, the first reaction does not occur completely, that is, the reaction yield is not
    100%, so NH3 and CO also remain free. Like that
    Carbamate is a highly corrosive product, what is done is to degrade the part of unbalanced carbamate to urea in its reagents
    30 origin (stage 7), and then reshape it.
    - Carbamate degradation stage (7):
    Since not all ammonium carbamate breaks down into urea + water.
    The fraction of the carbamate that does not decompose to form urea is recycled continuously to achieve a total conversion, being degraded again to NH3 and CO, and then re-formed
    carbamate
    - Urea synthesis stage (8): where carbamate is dehydrated to
    10 form urea by reaction:
    NH, -COONH4 (1) ~ NH, -CO -NH, (I) + H, O (1) to.H = +15.5 kJ / mol
    15 The Urea synthesis reaction is carried out at high pressures (200 bar) for example and the optimum thermal level (190 OC) for example in a
    Special stainless steel reactor.
    This is an endothermic reaction. The kinetics of the reaction increases with
    20 the temperature (you can take advantage of the one generated by the boiler),
    increasing the NH: and "C02 ratio and decreasing the presence of water.
    Urea production is achieved in a vertical reactor, which operates at 188
    - 190 oC and 160 Kgf / cm 'absolute, an N / C ratio of 3.6 -3.8, a
    25 residence time approximately 45 minutes and a degree of
    conversion (in one step) from 65 to 70%.
    One of the options to optimize the process is to perform combined operations for the formation of carbamate (exothermic and rapid) in the lower part of said reactor by feeding excess CO2 and NHa and decomposing the carbamate into urea (much slower Y
    endothermic).
    This stage is essential to reduce the biuret, having to reach a concentration of 80% urea.
    - Evaporation Stage (9): The current from the concentrator is
    still concentrating on two stages of evaporation, the first one (it
    it concentrates up to 95%) operating at 0.3 kg / cm 'absolute and the second (concentrates up to 99.8%) at a very high vacuum, to achieve
    10 evaporation of water without thermally decomposing urea. A large ejector must be used to achieve the required vacuum levels.
    This results in molten urea at 132 ° C with a very low content of
    15 water (approx. 0.5%).
    This urea obtained with the process of the invention has been manufactured
    from biomass as well as the chemical reactor AUS32 (AdBlue®)
    it comprises urea manufactured according to the invention.
    Optionally, a granulation stage (10) is contemplated where the
    Stream can be sent to a PriJling Tower or granulation, for urea pearl formation.
    25 Describing sufficiently the nature of the present invention, as well as the way of putting it into practice, it is not considered necessary to extend its explanation so that any expert in the field understands its scope and the advantages that derive from it, stating that , within its essentiality, may be implemented in
    30 other embodiments that differ in detail from that indicated by title
    example, and which will also achieve the protection that
    collects as long as it does not alter, change or modify its principle
    fundamental.
    权利要求:
    Claims (10)
    [1]
    1.-Procedure for the production of organic urea which, prepared to
    from the mixture and reaction between ammonia (NH,) preferably 5 gas and carbonic anhydride (CO), preferably gas in at least two stages (5, 8), one where the fonman mixed components
    the ammonium carbamate, and another where said ammonium carbamate is
    dehydrates to form urea, and preferably contemplating a stage of formation of carbamate (5), a stage of degradation of carbamate 10 (7) to CO, and NH "a stage of synthesis of urea (8) and a stage of evaporation of the water (9), is characterized in that it is carried out at
    Starting from biomass as raw material.
    [2]
    2. Procedure for the production of organic urea, according to claim 1, characterized in that the ammonia used is ammonia
    Organic biomass (2) of animal and plant origin.
    [3]
    3.-Procedure for the production of organic urea, according to the
    claim 1 or 2, characterized in that the carbon dioxide used 20 is recycled carbon dioxide from the exhaust gases (6) of boilers
    of combined cycle bio-gas (gas-solids) with plant biomass.
    [4]
    4.-Procedure for the production of organic urea, according to the
    claim 3, characterized in that the carbon dioxide is the one obtained from the exhaust gases of the boilers of the generators of
    Bio-gas plant steam and / or gases produced by the
    calorific use of plant biomass.
    [5]
    5. Process for the production of organic urea, according to any one of claims 1 to 4, characterized in that, in addition to the
    Carbamate formation stages (5), carbamate degradation (7), urea synthesis (8) and evaporation (9), comprises the following
    previous stages:
    5 - Methane stage (1), where it is loaded into a "digester" of
    biomass (2) biomass such as a mixture of pig manure,
    Pork blood, chicken purines, chicken blood, pinaza leaves (acts as a pH regulator), pinaza ashes (acts as a pH regulator) and water, and is heated externally until obtaining:
    10 methane gas, air, ammonia in the gaseous state and water vapor; Y
    - Catalysis stage (3), where the mass of gases obtained in the stage
    above, they are condensed by cooling and the ammonia gas is separated for storage at a pressure of 13 atmospheres.
    [6]
    6. Procedure for the production of organic urea, according to claim 5, characterized in that in the catalysis stage (3) the
    Remaining gaseous ammonia (4) is recirculated.
    20 7.-Procedure for the production of organic urea, according to the
    claim 5 or 6, characterized in that in the degradation step of the carbamate (7), the ammonium carbamate that does not decompose in Urea and Water and, therefore, is not part of the conversion, is to recycle it continuously in a continuous manner, being degraded again to
    25 NH3 AND CO, and then re-form it.
    [8]
    8. Process for the production of organic urea, according to any of claims 5 to 7, characterized in that in the urea synthesis stage (8) the production takes place in a vertical reactor, which
    30 operates at 188 -190 oC and 160 Kgflcm 'absolute, an N / C ratio of 3.6 -3.8, a residence time of approximately 45 minutes and a conversion rate of 65 to 70%.
    [9]
    9.- Procedure for the production of organic urea, according to the
    5 claim 8, characterized in that, in order to optimize the process, combined operations are carried out for the formation of carbamate, exothermic and rapid, in the lower part of said reactor by the
    feeding of CO, and excess NH3, and carbamate breakdown
    in urea, much slower and thermic.
    [10]
    10. Process for the production of organic urea, according to any of claims 5 to 9, characterized in that. to reduce the concentration of biuret in values below 0.35% and achieve an excess of ammonia in the urea synthesis (8) a vacuum concentrator is used
    15 which is heated using the steam from the steam generator of the Bio-gas plant.
    [11]
    11.-AUS32 manufacturing process characterized by comprising urea made from biomass.
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    同族专利:
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    WO2017009498A2|2017-01-19|
    US20180208551A1|2018-07-26|
    EP3321251A2|2018-05-16|
    CN108064221A|2018-05-22|
    ES2573717B1|2017-01-16|
    WO2017009498A3|2017-05-11|
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