GB957102A - Improvements relating to processes for the production of urea - Google Patents
Improvements relating to processes for the production of ureaInfo
- Publication number
- GB957102A GB957102A GB28616/61A GB2861661A GB957102A GB 957102 A GB957102 A GB 957102A GB 28616/61 A GB28616/61 A GB 28616/61A GB 2861661 A GB2861661 A GB 2861661A GB 957102 A GB957102 A GB 957102A
- Authority
- GB
- United Kingdom
- Prior art keywords
- sulphur
- urea
- seconds
- reaction
- activated carbon
- 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
-
- 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
- Y02P20/50—Improvements relating to the production of bulk chemicals
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Carbonyl sulphide for use in the production of urea (see Division C2) is obtained by reading carbon monoxide or a gas containing it with sulphur vapour at 300-700 DEG C. for 1-20 seconds. The reaction may be carried out in a reactor filled with ceramic material, which may be coated with a heavy metal sulphide, such as molybdenum or tungsten sulphide, as catalyst, at 550-700 DEG C. for 5-20 seconds. The reaction is preferably carried out with more than a 25% excess of sulphur. The small amount of CS2 in the reaction gas can be removed by washing it out with a suitable solvent or adsorbing it on activated carbon; or it may be removed by passage through a tower containing sulphur, sulphur for the reaction being taken from this tower and vaporized, addition of CO2 then converting the CS2 into COS. The mixture of reactants can also be obtained by passing pre-heated CO-containing gas through liquid sulphur.ALSO:Urea is obtained by reacting carbon monoxide or a carbon monoxide-containing gas with sulphur vapour at 300-700 DEG C. for 1-20 seconds to obtain carbonyl sulphide COS, cooling, adding ammonia and passing the mixture at 60-100 DEG C. over activated carbon. The first step may be carried out or reactor filled with ceramic material, which may be coated with a heavy metal sulphide catalyst, at 550-700 DEG C. for 5-20 seconds. The activated carbon in the second step may be stationary in one or more vertical towers, or may be moved countercurrent to the reactants. The urea deposited on the activated carbon may be dissolved in water and the solution concentrated to crystallise the urea.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEA35296A DE1158494B (en) | 1960-08-05 | 1960-08-05 | Process for the production of urea from carbon monoxide and ammonia |
DEA36604A DE1163311B (en) | 1961-01-28 | 1961-01-28 | Process for the production of urea from carbon monoxide and ammonia |
Publications (1)
Publication Number | Publication Date |
---|---|
GB957102A true GB957102A (en) | 1964-05-06 |
Family
ID=25963496
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB28616/61A Expired GB957102A (en) | 1960-08-05 | 1961-08-08 | Improvements relating to processes for the production of urea |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB957102A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9802153B2 (en) | 2016-03-04 | 2017-10-31 | Bogdan Wojak | Sulphur-assisted carbon capture and utilization (CCU) methods and systems |
CN114525157A (en) * | 2022-03-25 | 2022-05-24 | 上海科利蓝环境科技有限公司 | Coal gas fine desulfurization method and system |
-
1961
- 1961-08-08 GB GB28616/61A patent/GB957102A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9802153B2 (en) | 2016-03-04 | 2017-10-31 | Bogdan Wojak | Sulphur-assisted carbon capture and utilization (CCU) methods and systems |
CN114525157A (en) * | 2022-03-25 | 2022-05-24 | 上海科利蓝环境科技有限公司 | Coal gas fine desulfurization method and system |
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