GB883509A - Process for synthesizing urea - Google Patents
Process for synthesizing ureaInfo
- Publication number
- GB883509A GB883509A GB6800/60A GB680060A GB883509A GB 883509 A GB883509 A GB 883509A GB 6800/60 A GB6800/60 A GB 6800/60A GB 680060 A GB680060 A GB 680060A GB 883509 A GB883509 A GB 883509A
- Authority
- GB
- United Kingdom
- Prior art keywords
- ammonium carbamate
- urea
- carbon dioxide
- ammonia
- aqueous
- 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.)
- Expired
Links
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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/141—Feedstock
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
In a process for the production of urea by reacting a feed stream including ammonia and carbon dioxide at a temperature between 160 DEG C. and 200 DEG C. and a pressure between 2,000 p.s.i.g. and 4.500 p.s.i.g., the effluent stream containing urea and ammonium carbamate is passed through a first ammonium carbamate thermal decomposition stage, in which a portion of the ammonium carbamate is decomposed at reduced pressure to give an off-gas containing ammonia and carbon dioxide, which is scrubbed with water, aqueous ammonia, aqueous urea or aqueous ammonium carbamate while in heat exchange relation with the residual effluent stream in a second ammonium carbamate thermal decomposition stage, in which the remaining ammonium carbamate is decomposed at reduced pressure to give an off-gas containing ammonia and carbon dioxide, which is then removed from the remaining urea effluent. The solutions of absorbed off-gas may either be used for further scrubbing operations or may be recycled to a stage producing ammonia and carbon dioxide for the urea synthesis stage.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US883509XA | 1959-03-10 | 1959-03-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB883509A true GB883509A (en) | 1961-11-29 |
Family
ID=22210866
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB6800/60A Expired GB883509A (en) | 1959-03-10 | 1960-02-26 | Process for synthesizing urea |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB883509A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3347915A (en) * | 1961-07-14 | 1967-10-17 | Montedison Spa | Production of urea |
-
1960
- 1960-02-26 GB GB6800/60A patent/GB883509A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3347915A (en) * | 1961-07-14 | 1967-10-17 | Montedison Spa | Production of urea |
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