GB982785A - A process for the preparation of carbamic acid esters - Google Patents

A process for the preparation of carbamic acid esters

Info

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
Application number
GB19566/63A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
WR Grace and Co
Original Assignee
WR Grace and Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by WR Grace and Co filed Critical WR Grace and Co
Publication of GB982785A publication Critical patent/GB982785A/en
Expired legal-status Critical Current

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.
GB19566/63A 1962-05-23 1963-05-16 A process for the preparation of carbamic acid esters Expired GB982785A (en)

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)

* Cited by examiner, † Cited by third party
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 Process for stabilizing water temperature of hot water in carbamate production

Cited By (10)

* Cited by examiner, † Cited by third party
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 Process for stabilizing water temperature of hot water in carbamate production

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