SU446467A1 - The method of separation of ammonia from the circulating gas of ammonia synthesis - Google Patents
The method of separation of ammonia from the circulating gas of ammonia synthesisInfo
- Publication number
- SU446467A1 SU446467A1 SU1794575A SU1794575A SU446467A1 SU 446467 A1 SU446467 A1 SU 446467A1 SU 1794575 A SU1794575 A SU 1794575A SU 1794575 A SU1794575 A SU 1794575A SU 446467 A1 SU446467 A1 SU 446467A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- ammonia
- circulating gas
- separation
- synthesis
- ammonia synthesis
- Prior art date
Links
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- Fertilizers (AREA)
Description
1one
Изобретение относитс к способам синтеза амм.иака, широко используемого в химической промышлениости.This invention relates to methods for the synthesis of ammonia, widely used in the chemical industry.
Известен сп0:соб выделени аммиака из циркул ционного газа синтеза аммиака иутем поглощени последнего фосфорсодерн ащими кислотами с последующим образованием фосфатов аммони . Температура поглощени 75-85° С.Known is sp0: collecting ammonia from the circulating gas of ammonia synthesis and absorbing the latter with phosphoric acid with the subsequent formation of ammonium phosphates. Absorption temperature 75-85 ° C.
Однако ио данному способу необходимо охлаждение циркул ционного газа, так как его температзфа превышает 90° С, что приводит к конденсации части аммиака. На взаимодействие с фосфорной кислотой поступает ие более 6-8% ЫНз.However, this method requires cooling of the circulating gas, since its temperature exceeds 90 ° C, which leads to condensation of a part of ammonia. On the interaction with phosphoric acid does not more than 6-8% NN.
С целью упрощени и интенсификации ироцесса по предлагаемому способу в качестве фосфорсодержащей кислоты примен ют полифосфорную кислоту, и процесс ведут при 100-250° С и давлении 50-250 атм.In order to simplify and intensify the process by the proposed method, polyphosphoric acid is used as a phosphorus-containing acid, and the process is carried out at 100-250 ° C and a pressure of 50-250 atm.
Это позвол ет ликвидировать дополнительное охлаждение циркул ционного газа и увеличить степень улавливани аммиака в два раза. На поглощение поступает газ, содержащий 15% аммиака.This eliminates the additional cooling of the circulating gas and doubles the ammonia trapping rate. Absorption enters a gas containing 15% ammonia.
Пример. Циркул ционный газ состава: 20% N2, 60% Hz, 15% NHs, содержащий 1000 кг аммиака подают из колонны синтеза в абсорбер ири давлении 100 ат и 90° С.Example. The circulating gas of composition: 20% N2, 60% Hz, 15% NHs, containing 1000 kg of ammonia, is fed from the synthesis column to the air absorber at a pressure of 100 at and 90 ° C.
Одновременно в абсорбер нри 25° С и давлении 100 ат подают полифосфорную кислоту концентрацией 75% ио Р2О5 в количестве 6400 кг. При взаимодействии аммиака с полифосфорной кислотой в аппарате образуетс жидкое концентрированное удобрение. Газ, выход щий из абсорбера, с содержан.ием амм .иака 16,6 кг (0,3 об. %), подают во второй абсорбер, где поглощают остаточиый аммиак. Пройд второй абсорбер, газ, содержащий 0,0005% воды и не содержащий аммиака, направл ют в циркул ционную машииу, после чего подают в колонну синтеза аммиака. Выход полифосфата аммони составил 6 650 кг, At the same time, polyphosphoric acid with a concentration of 75% or P2O5 in the amount of 6400 kg is fed to the absorber at 25 ° C and a pressure of 100 atm. When ammonia interacts with polyphosphoric acid in the apparatus, a liquid concentrated fertilizer is formed. The gas leaving the absorber, with ammonia and 16.6 kg (0.3% by volume), is fed to the second absorber, where residual ammonia is absorbed. The second absorber, a gas containing 0.0005% of water and not containing ammonia, is passed to the circulation machine, and then fed to the ammonia synthesis column. The output of ammonium polyphosphate was 6 650 kg
Р205 72%, полученный продукт содержит Na 15%.P205 72%, the resulting product contains 15% Na.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU1794575A SU446467A1 (en) | 1972-06-07 | 1972-06-07 | The method of separation of ammonia from the circulating gas of ammonia synthesis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU1794575A SU446467A1 (en) | 1972-06-07 | 1972-06-07 | The method of separation of ammonia from the circulating gas of ammonia synthesis |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU446467A1 true SU446467A1 (en) | 1977-06-25 |
Family
ID=20517211
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU1794575A SU446467A1 (en) | 1972-06-07 | 1972-06-07 | The method of separation of ammonia from the circulating gas of ammonia synthesis |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU446467A1 (en) |
-
1972
- 1972-06-07 SU SU1794575A patent/SU446467A1/en active
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