IE790706L - Process for producing urea - Google Patents
Process for producing ureaInfo
- Publication number
- IE790706L IE790706L IE790706A IE70679A IE790706L IE 790706 L IE790706 L IE 790706L IE 790706 A IE790706 A IE 790706A IE 70679 A IE70679 A IE 70679A IE 790706 L IE790706 L IE 790706L
- Authority
- IE
- Ireland
- Prior art keywords
- solution
- carbamate
- urea
- ammonia
- passed
- Prior art date
Links
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 title abstract 6
- 239000004202 carbamide Substances 0.000 title abstract 6
- QGZKDVFQNNGYKY-UHFFFAOYSA-N ammonia Natural products N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 abstract 7
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 abstract 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract 4
- KXDHJXZQYSOELW-UHFFFAOYSA-M Carbamate Chemical compound NC([O-])=O KXDHJXZQYSOELW-UHFFFAOYSA-M 0.000 abstract 4
- 229910021529 ammonia Inorganic materials 0.000 abstract 3
- 229910002092 carbon dioxide Inorganic materials 0.000 abstract 3
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 abstract 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 abstract 2
- 238000010521 absorption reaction Methods 0.000 abstract 2
- 239000001099 ammonium carbonate Substances 0.000 abstract 2
- 235000012501 ammonium carbonate Nutrition 0.000 abstract 2
- 239000001569 carbon dioxide Substances 0.000 abstract 2
- 239000001257 hydrogen Substances 0.000 abstract 2
- 229910052739 hydrogen Inorganic materials 0.000 abstract 2
- 229910052757 nitrogen Inorganic materials 0.000 abstract 2
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonium chloride Substances [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 abstract 1
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 abstract 1
- BVCZEBOGSOYJJT-UHFFFAOYSA-N ammonium carbamate Chemical compound [NH4+].NC([O-])=O BVCZEBOGSOYJJT-UHFFFAOYSA-N 0.000 abstract 1
- 235000011114 ammonium hydroxide Nutrition 0.000 abstract 1
- KXDHJXZQYSOELW-UHFFFAOYSA-N carbonic acid monoamide Natural products NC(O)=O KXDHJXZQYSOELW-UHFFFAOYSA-N 0.000 abstract 1
- 238000000354 decomposition reaction Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 abstract 1
- 239000008246 gaseous mixture Substances 0.000 abstract 1
- 229930195733 hydrocarbon Natural products 0.000 abstract 1
- 150000002430 hydrocarbons Chemical class 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- 238000000629 steam reforming Methods 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C273/00—Preparation of urea or its derivatives, i.e. compounds containing any of the groups, the nitrogen atoms not being part of nitro or nitroso groups
- C07C273/02—Preparation of urea or its derivatives, i.e. compounds containing any of the groups, the nitrogen atoms not being part of nitro or nitroso groups of urea, its salts, complexes or addition compounds
- C07C273/04—Preparation of urea or its derivatives, i.e. compounds containing any of the groups, the nitrogen atoms not being part of nitro or nitroso groups of urea, its salts, complexes or addition compounds from carbon dioxide and ammonia
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Urea is produced form a gaseous mixture of H2, N2 and CO2, e.g. that obtained by the steam reforming of hydrocarbons. Carbon dioxide is absorbed from the mixture by the action, firstly, of an aqueous ammonia solution (e.g. above 70% by weight) and, secondly, of an ammonia-containing solution of ammonium carbonate, a solution of ammonium carbamate thus being obtained, together with a gaseous stream of nitrogen and hydrogen. The carbamate solution is passed to a urea reactor to obtain a urea solution containing unconverted carbamate and excess ammonia. The carbamate is decomposed and the evolved ammonia is recycled to the urea reactor along with carbon dioxide. The urea solution, now containing a reduced amount of carbamate (e.g. 50% of its original content), is passed to an adiabatic stripper in which the stripping gas used comprises hydrogen and nitrogen obtained from the CO2-absorption stage. Decomposition products together with water are removed from the adiabatic stripper, and are condensed in the presence of ammoniacal ammonium carbonate and the condensate so obtained is passed to the CO2-absorption step. <IMAGE>
[GB2018249A]
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT21993/78A IT1094295B (en) | 1978-04-05 | 1978-04-05 | INTEGRATED AMMONIA-UREA PROCEDURE |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| IE790706L true IE790706L (en) | 1979-10-05 |
| IE48099B1 IE48099B1 (en) | 1984-09-19 |
Family
ID=11189914
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IE706/79A IE48099B1 (en) | 1978-04-05 | 1979-08-08 | Process for producing urea |
Country Status (23)
| Country | Link |
|---|---|
| JP (1) | JPS54132525A (en) |
| AU (1) | AU519817B2 (en) |
| BE (1) | BE875346A (en) |
| BR (1) | BR7902122A (en) |
| CA (1) | CA1110659A (en) |
| CH (1) | CH637633A5 (en) |
| CS (1) | CS230563B2 (en) |
| DD (1) | DD142709A5 (en) |
| DE (1) | DE2913793C3 (en) |
| DK (1) | DK139179A (en) |
| EG (1) | EG13847A (en) |
| ES (1) | ES479940A1 (en) |
| FR (1) | FR2421847A1 (en) |
| GB (1) | GB2018249B (en) |
| IE (1) | IE48099B1 (en) |
| IN (1) | IN150631B (en) |
| IT (1) | IT1094295B (en) |
| LU (1) | LU81113A1 (en) |
| MX (1) | MX151216A (en) |
| NL (1) | NL7902566A (en) |
| PL (1) | PL116665B1 (en) |
| SE (1) | SE432591B (en) |
| SU (1) | SU1225485A3 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61109760A (en) * | 1984-11-02 | 1986-05-28 | Toyo Eng Corp | Production of urea |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4832091B1 (en) * | 1968-02-12 | 1973-10-04 | ||
| IT1014987B (en) * | 1974-06-12 | 1977-04-30 | Snam Progetti | INTEGRATED PROCEDURE UREA AM MONIACA |
| IT1034674B (en) * | 1975-03-28 | 1979-10-10 | Snam Progetti | FLEXIBLE INTERGRATED PROCESS FOR THE PRODUCTION OF EDUREA AMMONIA |
| IT1065422B (en) * | 1976-12-23 | 1985-02-25 | Snam Progetti | INTEGRATED AMMONIA-UREA PROCESS FOR UREA PRODUCTION |
-
1978
- 1978-04-05 IT IT21993/78A patent/IT1094295B/en active
-
1979
- 1979-03-07 AU AU44876/79A patent/AU519817B2/en not_active Ceased
- 1979-03-08 CA CA323,007A patent/CA1110659A/en not_active Expired
- 1979-03-15 GB GB7909086A patent/GB2018249B/en not_active Expired
- 1979-03-24 IN IN289/CAL/79A patent/IN150631B/en unknown
- 1979-03-28 FR FR7907848A patent/FR2421847A1/en active Granted
- 1979-03-28 EG EG195/79A patent/EG13847A/en active
- 1979-03-29 JP JP3633279A patent/JPS54132525A/en active Pending
- 1979-03-30 ES ES479940A patent/ES479940A1/en not_active Expired
- 1979-04-02 NL NL7902566A patent/NL7902566A/en not_active Application Discontinuation
- 1979-04-03 PL PL1979214649A patent/PL116665B1/en unknown
- 1979-04-03 DD DD79211973A patent/DD142709A5/en unknown
- 1979-04-03 LU LU81113A patent/LU81113A1/en unknown
- 1979-04-04 CS CS792292A patent/CS230563B2/en unknown
- 1979-04-04 SE SE7903018A patent/SE432591B/en not_active IP Right Cessation
- 1979-04-04 DK DK139179A patent/DK139179A/en not_active IP Right Cessation
- 1979-04-04 CH CH313979A patent/CH637633A5/en not_active IP Right Cessation
- 1979-04-04 MX MX177195A patent/MX151216A/en unknown
- 1979-04-04 SU SU792749003A patent/SU1225485A3/en active
- 1979-04-05 DE DE2913793A patent/DE2913793C3/en not_active Expired
- 1979-04-05 BR BR7902122A patent/BR7902122A/en unknown
- 1979-04-05 BE BE0/194424A patent/BE875346A/en not_active IP Right Cessation
- 1979-08-08 IE IE706/79A patent/IE48099B1/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| EG13847A (en) | 1982-12-31 |
| AU4487679A (en) | 1979-10-18 |
| DE2913793C3 (en) | 1981-05-27 |
| SE432591B (en) | 1984-04-09 |
| JPS54132525A (en) | 1979-10-15 |
| DD142709A5 (en) | 1980-07-09 |
| PL214649A1 (en) | 1979-12-17 |
| IT7821993A0 (en) | 1978-04-05 |
| ES479940A1 (en) | 1979-12-01 |
| CA1110659A (en) | 1981-10-13 |
| GB2018249B (en) | 1982-09-02 |
| CS230563B2 (en) | 1984-08-13 |
| DK139179A (en) | 1979-10-06 |
| IN150631B (en) | 1982-11-20 |
| FR2421847B1 (en) | 1982-10-22 |
| LU81113A1 (en) | 1979-06-19 |
| CH637633A5 (en) | 1983-08-15 |
| FR2421847A1 (en) | 1979-11-02 |
| GB2018249A (en) | 1979-10-17 |
| IE48099B1 (en) | 1984-09-19 |
| DE2913793A1 (en) | 1979-10-11 |
| IT1094295B (en) | 1985-07-26 |
| PL116665B1 (en) | 1981-06-30 |
| MX151216A (en) | 1984-10-11 |
| BR7902122A (en) | 1979-12-04 |
| DE2913793B2 (en) | 1980-06-04 |
| AU519817B2 (en) | 1981-12-24 |
| BE875346A (en) | 1979-10-05 |
| SE7903018L (en) | 1979-10-06 |
| NL7902566A (en) | 1979-10-09 |
| SU1225485A3 (en) | 1986-04-15 |
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