GB2018249A - Urea synthesis - Google Patents
Urea synthesisInfo
- Publication number
- GB2018249A GB2018249A GB7909086A GB7909086A GB2018249A GB 2018249 A GB2018249 A GB 2018249A GB 7909086 A GB7909086 A GB 7909086A GB 7909086 A GB7909086 A GB 7909086A GB 2018249 A GB2018249 A GB 2018249A
- Authority
- GB
- United Kingdom
- Prior art keywords
- solution
- carbamate
- urea
- ammonia
- passed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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
- 230000015572 biosynthetic process Effects 0.000 title 1
- 238000003786 synthesis reaction Methods 0.000 title 1
- 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>
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 |
|---|---|
| GB2018249A true GB2018249A (en) | 1979-10-17 |
| GB2018249B GB2018249B (en) | 1982-09-02 |
Family
ID=11189914
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB7909086A Expired GB2018249B (en) | 1978-04-05 | 1979-03-15 | Urea synthesis |
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) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2167066A (en) * | 1984-11-02 | 1986-05-21 | Toyo Engineering Corp | Process for producing 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 EG EG195/79A patent/EG13847A/en active
- 1979-03-28 FR FR7907848A patent/FR2421847A1/en active Granted
- 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 DD DD79211973A patent/DD142709A5/en unknown
- 1979-04-03 PL PL1979214649A patent/PL116665B1/en unknown
- 1979-04-03 LU LU81113A patent/LU81113A1/en unknown
- 1979-04-04 CS CS792292A patent/CS230563B2/en unknown
- 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 SE SE7903018A patent/SE432591B/en not_active IP Right Cessation
- 1979-04-04 SU SU792749003A patent/SU1225485A3/en active
- 1979-04-04 DK DK139179A patent/DK139179A/en not_active IP Right Cessation
- 1979-04-05 BE BE0/194424A patent/BE875346A/en not_active IP Right Cessation
- 1979-04-05 BR BR7902122A patent/BR7902122A/en unknown
- 1979-04-05 DE DE2913793A patent/DE2913793C3/en not_active Expired
- 1979-08-08 IE IE706/79A patent/IE48099B1/en unknown
Non-Patent Citations (1)
| Title |
|---|
| NONE * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2167066A (en) * | 1984-11-02 | 1986-05-21 | Toyo Engineering Corp | Process for producing urea |
Also Published As
| Publication number | Publication date |
|---|---|
| BR7902122A (en) | 1979-12-04 |
| IT7821993A0 (en) | 1978-04-05 |
| JPS54132525A (en) | 1979-10-15 |
| ES479940A1 (en) | 1979-12-01 |
| DK139179A (en) | 1979-10-06 |
| MX151216A (en) | 1984-10-11 |
| CH637633A5 (en) | 1983-08-15 |
| IE790706L (en) | 1979-10-05 |
| FR2421847A1 (en) | 1979-11-02 |
| NL7902566A (en) | 1979-10-09 |
| SE7903018L (en) | 1979-10-06 |
| AU519817B2 (en) | 1981-12-24 |
| GB2018249B (en) | 1982-09-02 |
| EG13847A (en) | 1982-12-31 |
| CS230563B2 (en) | 1984-08-13 |
| PL116665B1 (en) | 1981-06-30 |
| DE2913793C3 (en) | 1981-05-27 |
| SU1225485A3 (en) | 1986-04-15 |
| SE432591B (en) | 1984-04-09 |
| IN150631B (en) | 1982-11-20 |
| DE2913793A1 (en) | 1979-10-11 |
| AU4487679A (en) | 1979-10-18 |
| DD142709A5 (en) | 1980-07-09 |
| FR2421847B1 (en) | 1982-10-22 |
| IE48099B1 (en) | 1984-09-19 |
| IT1094295B (en) | 1985-07-26 |
| DE2913793B2 (en) | 1980-06-04 |
| LU81113A1 (en) | 1979-06-19 |
| CA1110659A (en) | 1981-10-13 |
| PL214649A1 (en) | 1979-12-17 |
| BE875346A (en) | 1979-10-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |