GB987500A - Process for the production of urea - Google Patents
Process for the production of ureaInfo
- Publication number
- GB987500A GB987500A GB8793/62A GB879362A GB987500A GB 987500 A GB987500 A GB 987500A GB 8793/62 A GB8793/62 A GB 8793/62A GB 879362 A GB879362 A GB 879362A GB 987500 A GB987500 A GB 987500A
- Authority
- GB
- United Kingdom
- Prior art keywords
- urea
- carbamate
- recycled
- carbon dioxide
- separated
- 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
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05C—NITROGENOUS FERTILISERS
- C05C9/00—Fertilisers containing urea or urea compounds
-
- 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
Urea is made by a process, in which gases containing excess ammonia, with respect to carbon dioxide, and carbon dioxide are reacted together with recycled gases, as hereinafter explained under ammonium carbamate forming conditions, the resulting product is subjected to urea synthesis conditions, the crude urea containing product is expanded and separated into ammonia-rich gas which is recycled to the urea synthesis zone and/or recovered as a comparatively pure gas, and a carbamate-containing urea solution which is further expanded and separated into a gaseous product which is recycled to the carbamate formation zone, and a carbamate-containing urea solution which is again expanded, decomposed, and separated into a gaseous product which is recycled to the carbamate formation zone and a urea rich aqueous solution. Especially useful starting mixtures of ammonia and carbon dioxide are those obtained from the production of melamine from urea. Two examples are described with reference to a flow sheet, in which the detailed compositions of the various streams in the system are included.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT560961 | 1961-03-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB987500A true GB987500A (en) | 1965-03-31 |
Family
ID=11120339
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8793/62A Expired GB987500A (en) | 1961-03-29 | 1962-03-07 | Process for the production of urea |
Country Status (7)
| Country | Link |
|---|---|
| BE (1) | BE615692A (en) |
| CH (1) | CH433244A (en) |
| DE (1) | DE1468207B2 (en) |
| ES (1) | ES275925A1 (en) |
| GB (1) | GB987500A (en) |
| NL (1) | NL276149A (en) |
| SE (1) | SE333727B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7893298B2 (en) * | 2005-05-13 | 2011-02-22 | Stamicarbon B.V. | Method for concentrating an aqueous ammonium carbamate stream |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2344125C2 (en) * | 2004-02-20 | 2009-01-20 | Уреа Касале С.А. | Method and plant for combined production of carbamide and melamine |
| EP1918274A1 (en) * | 2006-11-04 | 2008-05-07 | Urea Casale S.A. | Integrated process for urea and melamine production |
-
0
- BE BE615692D patent/BE615692A/xx unknown
- NL NL276149D patent/NL276149A/xx unknown
-
1962
- 1962-03-07 GB GB8793/62A patent/GB987500A/en not_active Expired
- 1962-03-24 CH CH356462A patent/CH433244A/en unknown
- 1962-03-24 DE DE19621468207 patent/DE1468207B2/en active Pending
- 1962-03-28 SE SE03451/62A patent/SE333727B/xx unknown
- 1962-03-28 ES ES275925A patent/ES275925A1/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7893298B2 (en) * | 2005-05-13 | 2011-02-22 | Stamicarbon B.V. | Method for concentrating an aqueous ammonium carbamate stream |
Also Published As
| Publication number | Publication date |
|---|---|
| NL276149A (en) | 1900-01-01 |
| DE1468207A1 (en) | 1968-11-28 |
| SE333727B (en) | 1971-03-29 |
| BE615692A (en) | 1900-01-01 |
| CH433244A (en) | 1967-04-15 |
| ES275925A1 (en) | 1962-09-16 |
| DE1468207B2 (en) | 1973-06-28 |
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