GB1361078A - Method of controlling urea system - Google Patents
Method of controlling urea systemInfo
- Publication number
- GB1361078A GB1361078A GB4888771A GB4888771A GB1361078A GB 1361078 A GB1361078 A GB 1361078A GB 4888771 A GB4888771 A GB 4888771A GB 4888771 A GB4888771 A GB 4888771A GB 1361078 A GB1361078 A GB 1361078A
- Authority
- GB
- United Kingdom
- Prior art keywords
- urea
- carbon dioxide
- recycled
- ammonia
- ammonium carbamate
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
1361078 Urea I MAVROVIC 21 Oct 1971 [10 Nov 1970] 48887/71 Heading C2C Urea is produced in a process in which ammonia and carbon dioxide together with recycled ammonium carbamate are reacted at elevated temperature and pressure, wherein [1] the urea-reactor effluent is heated under reduced pressure in a decomposer to give an aqueous urea solution and to decompose ammonium carbamate to ammonia and carbon dioxide, [2] vaporized ammonia, carbon dioxide and water vapour from step [1] are passed to a condensing system in which the vapour stream is partially or totally condensed to give a liquid ammoniumcarbamate containing stream which is recycled to the urea reactor, and [3] the refractive index of the liquid phase recycled to the reactor is determined and the ratio of ammonium carbamate to water in this liquid phase is regulated as a function of this refractive index.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US8827270A | 1970-11-10 | 1970-11-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1361078A true GB1361078A (en) | 1974-07-24 |
Family
ID=22210405
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4888771A Expired GB1361078A (en) | 1970-11-10 | 1971-10-21 | Method of controlling urea system |
Country Status (11)
| Country | Link |
|---|---|
| JP (1) | JPS5613709B1 (en) |
| BE (1) | BE775178A (en) |
| BR (1) | BR7107475D0 (en) |
| CA (1) | CA952535A (en) |
| DE (1) | DE2154946A1 (en) |
| ES (1) | ES396661A1 (en) |
| FR (1) | FR2112875A5 (en) |
| GB (1) | GB1361078A (en) |
| IT (1) | IT941733B (en) |
| NL (1) | NL7115468A (en) |
| TR (1) | TR16644A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7048910B2 (en) | 2000-09-07 | 2006-05-23 | Merck Patent Gmbh | Use of ectoine or ectoine derivatives for oral care |
-
1970
- 1970-12-29 FR FR7047008A patent/FR2112875A5/fr not_active Expired
-
1971
- 1971-10-21 GB GB4888771A patent/GB1361078A/en not_active Expired
- 1971-11-02 CA CA126,683A patent/CA952535A/en not_active Expired
- 1971-11-04 ES ES396661A patent/ES396661A1/en not_active Expired
- 1971-11-05 DE DE19712154946 patent/DE2154946A1/en active Pending
- 1971-11-08 JP JP8834571A patent/JPS5613709B1/ja active Pending
- 1971-11-09 IT IT3087671A patent/IT941733B/en active
- 1971-11-09 BR BR747571A patent/BR7107475D0/en unknown
- 1971-11-10 NL NL7115468A patent/NL7115468A/xx active Search and Examination
- 1971-11-10 TR TR1664471A patent/TR16644A/en unknown
- 1971-11-10 BE BE775178A patent/BE775178A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| DE2154946A1 (en) | 1972-05-18 |
| TR16644A (en) | 1973-01-01 |
| JPS5613709B1 (en) | 1981-03-30 |
| FR2112875A5 (en) | 1972-06-23 |
| BE775178A (en) | 1972-03-01 |
| NL7115468A (en) | 1972-05-15 |
| IT941733B (en) | 1973-03-10 |
| CA952535A (en) | 1974-08-06 |
| BR7107475D0 (en) | 1973-04-19 |
| ES396661A1 (en) | 1974-05-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |