• 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:
    In the manufacture of nitric acid having a relatively high concentration by catalytic oxidation of ammonia followed by oxidation of the nitrous vapors so obtained and absorption of the oxidized vapors by a solution of nitric acid of relatively low concentration, the nitrous vapors obtained directly from the catalytic combustion of ammonia are intimately contacted with nitric acid at low concentration, whereafter the resulting vapors, which contain less nitrous gas, are contacted with the resulting acid of higher concentration, and so on until nitric acid of the desired concentration is obtained, the successive vapors with a progressively decreasing nitrous gas content being left to pause in an oxidation space between each contacting operation.
    公开号:SU974929A3
    申请号:SU721785483
    申请日:1972-05-24
    公开日:1982-11-15
    发明作者:Ажинэ Жерар；Манури Жан；Мартэн Эдуард
    申请人:С.А.Южин Кульман (Фирма)；
    IPC主号:
    专利说明:

    The invention relates to a device for producing nitric acid.
    A plate column is known for the production of nitric acid, in which nitrous vapors, which are formed directly from the combustion of ammonia, are guided under a higher plate. The column is located thanks to a set of chimneys and partitions between the plates so that the acid flows from the upper plate directly to the lower plate, while the vapors passing through the upper plate are again sent directly under the lower plate, etc. Each rail and coil is equipped with cooling means, for example, a coil through which coolant passes, for example water, ammonia or brine) The height between successive plates, 20 formed by the sum of the geometric height between the plate and the sealed partition that is above it, and the geometric height Between directly lower plate 25 and a sealed partition, which is located under it, determines the volume of oxidation zones and, therefore, the residence time of nitrozone vapors in each of these zones [1].
    A device for producing nitric acid, containing a cylindrical body with a lid and a bottom, contact plates connected to one another by transfer devices and equipped with cooling elements, fittings for input and output of diluted acid and nitrous vapors [2].
    The purpose of the invention is to increase efficiency by increasing contact time.
    To achieve this goal, a device for producing nitric acid containing a cylindrical body with a lid and a bottom, contact plates connected to one another by transfer devices and equipped with cooling elements, inlets and outlets for diluted kit 3 974929 4 lots, and nitrous vapors, inlet fitting nitrous vapors are located under the upper plate, and between the plates there are blind horizontal partitions through which 5 pipes pass for the removal of vapors and diluted acid from the upper plate to the lower container Christmas tree.
    In addition, in its lower part a device for denitrating * 0 is mounted, made in the form of a series of plates connected by transfer pipes and an air inlet fitting under the lower plate.
    The drawing shows a device 15 for producing nitric acid, a vertical schematic section.
    The device comprises a housing 1 with a bottom 2, in which contact plates 3 are located one above the other. Each 20 plate 3 includes a drainage bowl for acid release and a drainage bowl for acid release, as well as a cooling coil 6, in which cooling fluid is circulated 25 bones, such as water, brine or ammonia. Each bowl is equipped with a vertical pipe 7. For the exit of acid, which exits through the pipes and the bowl for the release of acid directly 30 lower plates.
    Plates 3 are separated from one another by gas-tight partitions 8, which leave separate 35 gaps below and above each respective plate and through which pipes 7 for) drain the acid, pipes 9, respectively connecting the space located above each plate 3, with a space located directly below the lower plate 3, and a chimney 10 / entering 'into the lower partition 8 connecting the lower and upper partitions 8. In the chamber located under the lower partition 8, the inlet fitting 11 is fixed nitrous vapors.
    The device operates as follows50. ·
    Nitrous vapors generated from the catalytic combustion of ammonia and containing mainly water, N0 and N0 ^ (or, entering the housing 1 and rise through the central chimney 55 pipe 10 under the upper plate 3. During this run and the gas is in space, enclosed under the upper plate 3, these vapors continue to oxidize and the content in them
    N0 ^ (or, therefore, increases. These vapors pass through a 3 ”plate on which they interact with a weak concentration of nitric acid (approximately 40%) entering through the nozzle 12 and are cooled by the liquid circulating in the coil 6. Some of the water from the vapor condenses and mixes with acid, and the fraction N0 ^ (or N ^ 0 ^) is absorbed by this water.Vapors depleted of water and N0 ^, then flow into the space located above the upper plate 3, and pass through the pipe 9 into the space located under below plate 3. At this time enriched acid flows through drain pipe 7 to the next plate
    3. In the space located above plate 3 and under the plate following it, nitrous pairs continue to be oxidized and the relative content of NO ^ lN ^ O ^ J in them increases. The operations carried out on the upper plate are repeated on the lower plates 3, the pairs flowing above the last pass under the next plate 3, while the enriched acid that flows from them passes to this plate and further to the lower plate 3 J pairs, each the possibilities maximally freed from N0 + + Νθ £, which flow above the latter, exit the column through the nozzle 13, while the nitric acid of the desired concentration, approximately 60%, flows from the lower plate 3 through the drain pipe 7 to the plate with distillation pipes 15 .
    This acid, in which a certain amount of Ν0 4 is dissolved, meets on the subsequent plates 1.4 reserve air supplied by counterflow through the nozzle 16, which entrains the dissolved N0 ^ saturated with the latter, mixes with nitrous vapors entering the column through the nozzle 11, increasing the amount of N0 ^ which they contain. He then participates in the oxidation of N0 in these vapors during their run into the column. Finally, the denitrated acid, which is collected at the bottom of the column, is sent to the warehouse through the fitting 17.
    权利要求:
    Claims (2)
    [1]
    lots, and nitrous vapors, a fitting for introducing nitrous vapors are located under the top plate, and between the plates there are blind horizontal bulkheads through which branch pipes for the removal of vapors and dilute acid from the top plate to the bottom plate. In addition, in its lower part there is a device for denitration, made in the form of a series of plates, connected by overflow pipes and an air inlet fitting under the bottom plate. The drawing shows a device for producing nitric acid, a vertical schematic section. The device comprises a housing 1 with bottom 2, in which the contact plates 3 are placed one on another. Each plate 3 includes an overflow drain for the acid and a drain bowl 5 for the acid output, and also a cooling coil 6 in which the circulation is provided coolant, for example, water, brine or ammonia. Each bowl is provided with a vertical pipe 7 for the acid to exit, which exits through the pipes and the mash for discharging the acid directly to the bottom plate. The plates 3 are separated from one another by partitions 8 which are impermeable to giza, which leave separate gaps under and over each respective plate and through which the pipes 7 A dl (acid descent, pipes 9 connecting respectively the space above each plate 3 , with a space located under the immediately lower plate 3, and the flue pipe 10, which enters the lower partition 8, which connects the lower and upper partition 8. In the chamber located under the lower partition 8, the fitting 11 for admission of foul vapor. The device works as follows. Nitrous vapors formed from catalytic combustion of ammonia and containing mostly water, NO and N0 (or), enter the body T and rise through the central chimney 10 under the top plate 3. In the time of this run and the stay of gas in the space enclosed under the upper plate 3, these pairs continue to oxidize and their content is N0; j (or, therefore, increases. These pairs pass through the plate 3, in which they interact with nitric acid concentration (approx Tel'nykh) flowing through the nozzle 12 and are cooled by fluid circulating in the coil 6. A part of the water vapor condenses and mixes with the acid fraction and (or) of the absorbed water. The vapors depleted from water and ud then flow into the space above the upper plate 3 and pass through the pipe 9 into the space below the plate 3 below. At this time, the enriched acid flows through the drain pipe 7 to the next plate 3, B space located above the plate 3 and below the next plate, the nitrous pairs continue to oxidize and their relative content is Shl (increases. The operations carried out on the top plate are repeated on the plates 3 below, the pairs flowing over The last one passes under the next plate 3, while the acid is enriched. Kotor of them flows out onto this plate and further up to the bottom plate 3} pairs, as much as possible free from N0 + + N0 that flow over the latter, columns through fitting 13, while nitric acid of the desired concentration, approximately 60%, flows from the lower plate 3 through the discharge pipe 7 to the tar. 1 with distillation nozzles 15. This acid, in which some NQj is dissolved, meets on cymbals 1. backup The heat supplied by the flow through the nozzle 16, which carries the dissolved N0, which is saturated with the latter, is mixed with the nitrous vapors entering through the nozzle 11 into the column, increasing the amount of N0 they contain. He then participates in the oxidation of N0 on these pairs during their run 8 of the column. Finally, the denitrated acid, which is collected at the bottom of the column, is sent to the warehouse through nozzle 17. Claim 1. An apparatus for producing nitric acid, comprising a cylindrical body with a lid and a bottom, contact plates connected to one another with overflow devices and equipped with cooling elements, inlets and outlets of diluted s acid and nitrous vapors, from the fact that, in order to improve the efficiency of the apparatus by increasing the contact time, the union of nitrous pairs in-U races laid under the top plate, and the plates are installed between deaf horizontal partitions, through which the pipes for discharging the vapor and the dilute acid from the top of the dish-ts it to the bottom plate. S 9 2. The device according to claim 1, characterized in that in its lower part there is a device for denitration, made in a series of plates, connected by inlet pipes and air inlet fitting under the bottom plate. Sources of information taken into account in the examination 1. If France Patent 1 162740, cl. On 01 J 19/00, 1966.
    [2]
    2. Technical guide on nitric acid. T, II .. GIAP, 1963, p. 92
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    同族专利:
    公开号 | 公开日
    RO56958A|1975-02-15|
    DE1932945C3|1979-02-01|
    NO131240C|1975-04-30|
    NL6910087A|1970-01-05|
    DK132655C|1976-07-05|
    AT294857B|1971-12-10|
    NO131240B|1975-01-20|
    ES368971A1|1971-07-16|
    DE1932945A1|1970-01-29|
    NL144557B|1975-01-15|
    DK132655B|1976-01-19|
    FR1583251A|1969-10-24|
    CS155208B2|1974-05-30|
    BE734633A|1969-12-01|
    US3658472A|1972-04-25|
    GB1271698A|1972-04-26|
    DE1932945B2|1978-06-08|
    SE360063B|1973-09-17|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US1692298A|1923-09-06|1928-11-20|Atmospheric Nitrogen Corp|Production of nitric acid from ammonia|
    FR653431A|1929-09-14|Elek Zitatswerk Lonza|Process for the absorption of nitrogen oxides|
    NL38494C|1932-06-04|
    FR786953A|1935-01-19|1935-09-14|Bamag Meguin Ag|Process for the absorption in highly concentrated nitric acid of nitrous gases produced by the combustion of ammonia|
    GB569687A|1943-07-14|1945-06-05|Mieczyslaw Joseph Kalous|Improved process for absorbing nitrogen oxides|
    US3116972A|1960-05-06|1964-01-07|Sonneborn Chemical And Refinin|Process for the absorption of so3 by substantially parallel films of liquid absorbent|FR2093411A5|1970-06-12|1972-01-28|Ugine Kuhlmann|
    US3949057A|1973-01-29|1976-04-06|Croll-Reynolds Company, Inc.|Air pollution control of oxides of nitrogen|
    US4081518A|1976-10-13|1978-03-28|American Hydrocarbon Company|Gaseous product stream|
    DE2749550A1|1977-11-05|1979-05-10|Hoechst Ag|METHOD OF ABSORBING NITROUS GASES|
    DE3801490C2|1988-01-20|1990-01-18|Uhde Gmbh, 4600 Dortmund, De|
    CN103339456A|2010-12-01|2013-10-02|悉尼大学|Apparatus for use in production of nitric acid|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    FR157424|1968-07-01|
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