GB982785A - A process for the preparation of carbamic acid esters - Google Patents
A process for the preparation of carbamic acid estersInfo
- Publication number
- GB982785A GB982785A GB19566/63A GB1956663A GB982785A GB 982785 A GB982785 A GB 982785A GB 19566/63 A GB19566/63 A GB 19566/63A GB 1956663 A GB1956663 A GB 1956663A GB 982785 A GB982785 A GB 982785A
- Authority
- GB
- United Kingdom
- Prior art keywords
- alcohol
- pressure
- acid esters
- carbamic acid
- butanol
- 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
- C07C271/00—Derivatives of carbamic acids, i.e. compounds containing any of the groups, the nitrogen atom not being part of nitro or nitroso groups
- C07C271/06—Esters of carbamic acids
-
- 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
- Y02P20/582—Recycling of unreacted starting or intermediate materials
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Carbamic acid esters are prepared by mixing a C1- 8 monohydroxy aliphatic alcohol with urea in a proportion of at least two moles of alcohol per mole of urea and heating the mixture for not more than 1 1/2 hours in the absence of a reaction catalyst to a temperature in the range 180 DEG to 230 DEG C., while maintaining a pressure at least equal to the vapour pressure of said heated mixture and venting by-product ammonia gas from said heated mixture at a rate such that the pressure does not fall below the said vapour pressure. The above process may be adapted for continuous working. Specified alcohol reactants are methanol, ethanol, 2-methoxy-methanol, 2-chloroethanol, propanol, allyl alcohol, isopropanol, butanol, isobutanol, secondary-butanol, and primary and secondary amyl and octyl alcohols. Carbamic ester product may be separated from unreacted material by cooling to between - 70 DEG and - 20 DEG C.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US19699962A | 1962-05-23 | 1962-05-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB982785A true GB982785A (en) | 1965-02-10 |
Family
ID=22727604
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB19566/63A Expired GB982785A (en) | 1962-05-23 | 1963-05-16 | A process for the preparation of carbamic acid esters |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB982785A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0083764A2 (en) * | 1982-01-12 | 1983-07-20 | BASF Aktiengesellschaft | Process for the preparation of carbamates |
| US4443622A (en) * | 1981-05-15 | 1984-04-17 | West Point Pepperell, Inc. | Method for making carbamates |
| US5463109A (en) * | 1990-03-27 | 1995-10-31 | Ube Industries, Ltd. | Process for preparing carbamates |
| US5744633A (en) * | 1993-12-13 | 1998-04-28 | Bayer Aktiengesellschaft | Process for the production of diurethanes and their use for the production of diisocyanates |
| CN105777583A (en) * | 2016-05-07 | 2016-07-20 | 长春工业大学 | Method for preparing methyl carbamate by urea methanolysis method |
| WO2016147204A1 (en) * | 2015-03-13 | 2016-09-22 | Council Of Scientific And Industrial Research | Novel configuration and its use in process for synthesis of alkyl carbamates from alkyl alcohol and urea in a tubular reactor |
| CN115108943A (en) * | 2022-08-09 | 2022-09-27 | 山东禹城易澳科技有限公司 | A process for stabilizing hot water temperature in carbamate production |
-
1963
- 1963-05-16 GB GB19566/63A patent/GB982785A/en not_active Expired
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4443622A (en) * | 1981-05-15 | 1984-04-17 | West Point Pepperell, Inc. | Method for making carbamates |
| EP0083764A2 (en) * | 1982-01-12 | 1983-07-20 | BASF Aktiengesellschaft | Process for the preparation of carbamates |
| EP0083764A3 (en) * | 1982-01-12 | 1984-12-12 | Basf Aktiengesellschaft | Process for the preparation of carbamates |
| US5463109A (en) * | 1990-03-27 | 1995-10-31 | Ube Industries, Ltd. | Process for preparing carbamates |
| US5744633A (en) * | 1993-12-13 | 1998-04-28 | Bayer Aktiengesellschaft | Process for the production of diurethanes and their use for the production of diisocyanates |
| WO2016147204A1 (en) * | 2015-03-13 | 2016-09-22 | Council Of Scientific And Industrial Research | Novel configuration and its use in process for synthesis of alkyl carbamates from alkyl alcohol and urea in a tubular reactor |
| CN107771174A (en) * | 2015-03-13 | 2018-03-06 | 科学与工业研究委员会 | New configuration and its in tubular reactor by the method for alkylol and urea synthesizing amino alkyl formate in purposes |
| JP2018507902A (en) * | 2015-03-13 | 2018-03-22 | カウンシル オブ サイエンティフィック アンド インダストリアル リサーチ | A novel configuration and its use in the process of synthesizing alkyl carbamates from alkyl alcohol and urea in a tubular reactor |
| CN105777583A (en) * | 2016-05-07 | 2016-07-20 | 长春工业大学 | Method for preparing methyl carbamate by urea methanolysis method |
| CN115108943A (en) * | 2022-08-09 | 2022-09-27 | 山东禹城易澳科技有限公司 | A process for stabilizing hot water temperature in carbamate production |
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