• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Granular NPK-fertilizers are prepared by granulating a liquid mixture obtained by adding a solid, particulate potassium salt to a liquid ammoniumnitrate containing phase, which either contains ammoniumphosphate or to which this is not added. …<??>The potassium salt particles have an average size no greater than 55 mu , while less than 1%wt are larger than 150 mu , and are added at a temperature between 5 and 40 DEG C. …<??>The resulting granules show an excellent storage-stability.
    公开号:SU1056896A3
    申请号:SU792783750
    申请日:1979-07-03
    公开日:1983-11-23
    发明作者:Виллем Хогендонк Йохан；Жозеф Лукасен Сервантус
    申请人:Уни Ван Кунстместфабрикен Б.В. (Фирма)；
    IPC主号:
    专利说明:

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    This invention relates to methods for producing granular complex fertilizers containing potassium chloride.
    A known method for producing granulated complex fertilizers by mixing ammophos with carbamide and potassium chloride, followed by granulation of the obtained product in a high temperature. Potassium chloride entering the mixing and granulation is preheated to a temperature that helps melting of the lowest amount of component l. .
    The disadvantage of this method is the need to preheat the chloride gas, which considerably complicates the process.
    The closest to the invention to the technical essence and the achieved result is the method of obtaining granulated complex fertilizers, concluded that a solid potassium salt, ground so that 70 weights are added to the melt or suspension of salts containing phosphate and ammonium nitrate .% of particles have a size greater than 0.1 mm or 100 microns. The resulting mixture is granulated by spraying. In this case, very large particles of the potassium salt 2J are used.
    However, during storage of the product obtained, chemical reactions continue to accompany the formation of new crystals, which causes a significant decrease in the impact strength of the granules, cracking of the surface, which leads to the formation of dust and an increase in the amount of small particles. The strength of the granules is 40-55 kg / cm. . .
    The purpose of the invention is to increase the permeability of the granules and their stability during storage.
    The goal is achieved by the fact that according to the method of obtaining granulated complex fertilizers, including the introduction of potassium chloride into a solution or solution of a mixture of ammonium nitrate and ammonium phosphate followed by granulation of the mixture, potassium chloride is introduced as a solid salt, with a particle size of not more than 55 microns containing more than 1% of particles larger than 150 microns with temperature,
    In addition, it is advisable to introduce potassium chloride particles with a temperature of 10-25 o.
    At the same time, potassium chloride is introduced for mixing directly into gra-. zeroing device.
    Example 1: Granular potassium chloride with an average particle size of 5.0 ivpcM, containing particles of more than 150 microns in size meeee
    1 wt.% And a temperature of 2O-2 are mixed with the melt, which is a mixture of ammonium nitrate and ammonium phosphate in the ratio N: P2O5 1: 1 with a temperature of 160 ° C and a moisture content of 4.5 wt.%. The resulting mixture is visually mixed with a viscosity of 100150 cps for 25 seconds and then granulated with a pelleting screw. Get the product with the relationship NiPyOyiK O 17:17:17. Using X-ray diffraction analysis, it was found that more than 90% of KCt was converted immediately after the addition of CS to mixing capacity. The resulting product showed no signs of decomposition during storage for more than 6 months. The initial impact strength (55-, 60 kg / cm) remained the same and the number of small particles is negligible. Sintering did not occur and no dust was observed when packing in bags.
    PRI mme R 2. A liquid mixture of ammonium nitrate and ammonium phosphate with an N: P20 ratio of 1: 1, a temperature of 160 ° C and a moisture content of 4.5% by weight is fed to a pelleting screw. CCEs with an average particle size of 50 μm and less than 1% by weight of particles larger than 150 μm in size are fed directly to the auger. kc added t without preheating (20-25C). Using X-ray analysis, it was found that transformation of more than 90% by weight of C € in the granulated product occurred.
    The product showed no signs of release after storage for more than 6 months. The impact strength of the facto has not changed {55-60 kg / cm) and the formation of solid particles and sintering was almost not observed. On the surface of the product there was no fading and there was no dust when packing into bags.
    P p i. measure 3. In the same way as in example 2, granulated fertilizer is prepared by supplying preheated CSE with an average particle size of 110 µm directly to the granulating screw1. X-ray diffraction analysis showed that only 70% of KOf was converted into a granulated product.
    After six weeks of storage, sintering of the product pellets was observed to such an extent that bagging is virtually impossible. Moreover, the product gave significant dust formation.
    Thus, the use of the invention allows to obtain zero full fertilizer with increased crushing strength (5D-60 kg / cm), which is almost
    310568964
    or does not decompose at all when stored or pre-mixed. There is no need in the baseline salt for a more complete preheating of the potassium salt 1 by the interaction of the starting products.
    权利要求:
    Claims (3)
    [1]
    1.SPOSOB PRODUCING GRANULAR FERTILIZER COMPLEX comprising administering chloride ka lija the melt or solution of ammonium nitrate and ammonium phosphate mixture, followed by granulating the resulting mixture, characterized in that from 1 to improve the strength of granules and their stability during storage, potassium chloride is introduced into in the form of a solid salt with a particle size of not more than 55 microns, containing not more than .1% of particles larger than 150 microns with a temperature of 5-40 ° C.
    ''
    [2]
    2. The method according to claim 1, characterized in that the particles of potassium chloride are introduced with a temperature of 10-25 ° C.
    [3]
    3. The method according to claim 1, about t and h a ro-il and th with the fact that potassium chloride 4 is introduced into the mixture directly into the granulating device.
    SU „„ 1056896
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    同族专利:
    公开号 | 公开日
    YU40566B|1986-02-28|
    TR20420A|1981-06-26|
    EG14816A|1985-06-30|
    CA1120282A|1982-03-23|
    ES482116A1|1980-08-16|
    DE2961761D1|1982-02-25|
    JPS619277B2|1986-03-20|
    MA18504A1|1980-04-01|
    IN152174B|1983-11-05|
    US4398936A|1983-08-16|
    YU147679A|1983-01-21|
    IE791246L|1980-01-04|
    NL7807219A|1980-01-08|
    EP0007132B1|1982-01-06|
    AT535T|1982-01-15|
    IE48161B1|1984-10-17|
    JPS5510494A|1980-01-24|
    BR7904199A|1980-03-18|
    GR72920B|1984-01-11|
    EP0007132A1|1980-01-23|
    MX5936E|1984-08-30|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    WO2001051431A1|2000-01-14|2001-07-19|International Vti Group Holding Bv|Method for producing nitrogenous-potash fertiliser|US3032408A|1957-08-05|1962-05-01|Int Minerals & Chem Corp|Process of pelletizing phosphate rock|
    US3002831A|1958-06-16|1961-10-03|Int Minerals & Chem Corp|Fertilizer granulation process|
    GB1008402A|1960-12-24|1965-10-27|Fisons Ltd|Production of fertilizers|
    GB1019342A|1962-08-14|1966-02-02|Fisons Ltd|Fertilizer|
    GB999148A|1963-05-30|1965-07-21|Ici Ltd|Improvements in and relating to fertilizers|
    GB1083081A|1965-02-19|1967-09-13|Scottish Agricultural Ind Ltd|Granulation process|
    GB1109410A|1966-04-01|1968-04-10|Toyo Koatsu Ind Inc|Production of granular fertilizer|
    US3617237A|1969-01-21|1971-11-02|Mitsui Toatsu Chemicals|Process for producing granular compound fertilizer|
    GB1466868A|1973-04-19|1977-03-09|Unilever Ltd|Granulation of materials|
    SU485099A1|1973-06-15|1975-09-25|Предприятие П/Я В-8830|The method of obtaining complex fertilizers|NL8203722A|1982-09-25|1984-04-16|Unie Van Kunstmestfab Bv|METHOD FOR PREPARING STORAGE STABLE, GRANULAR MIXED FERTILIZERS, AND FERTILIZERS OBTAINED BY THIS METHOD|
    NL8203723A|1982-09-25|1984-04-16|Unie Van Kunstmestfab Bv|PROCESS FOR PREPARING HIGH POTASSIUM GRANULAR FERTILIZERS AND SO FERTILIZERS OBTAINED.|
    JPH0426224Y2|1986-12-03|1992-06-24|
    IT1252664B|1991-12-23|1995-06-21|Enichem Agricoltura Spa|PROCESS FOR THE GRANULATION OF A FERTILIZER DENOMINATED AMMONIC NITRATE|
    FI98518C|1995-06-22|1997-07-10|Kemira Agro Oy|Aqueous fertilizer suspension|
    FI981490A|1998-06-29|1999-12-30|Kemira Agro Oy|Process for making manure mixtures|
    JP4571720B2|1999-10-29|2010-10-27|東ソ−・エフテック株式会社|Method for producing potassium chloride for fertilizer|
    CN104692977A|2015-03-21|2015-06-10|史丹利化肥股份有限公司|Tower-type melt granulation special fertilizer for improvement of saline land and preparation method thereof|
    JP6754029B2|2016-06-30|2020-09-09|北川工業株式会社|Manufacturing method of heat storage device, manufacturing method of pellet type heat storage material, pellet type heat storage material and heat storage device|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    NL7807219A|NL7807219A|1978-07-04|1978-07-04|METHOD FOR PREPARING A GRANULAR NPK PLASTIC FERTILIZER AND GRANULAR NPK PLASTIC FERTILIZERS OBTAINED BY THIS PROCESS.|
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