JPS57171953A - Improved method for condensing n-phenylcarbamic acid ester - Google Patents

Improved method for condensing n-phenylcarbamic acid ester

Info

Publication number
JPS57171953A
JPS57171953A JP56056771A JP5677181A JPS57171953A JP S57171953 A JPS57171953 A JP S57171953A JP 56056771 A JP56056771 A JP 56056771A JP 5677181 A JP5677181 A JP 5677181A JP S57171953 A JPS57171953 A JP S57171953A
Authority
JP
Japan
Prior art keywords
catalyst
carboxylic acid
acid ester
methylene
phenylcarbamic
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.)
Granted
Application number
JP56056771A
Other languages
Japanese (ja)
Other versions
JPS6247177B2 (en
Inventor
Shinsuke Fukuoka
Masazumi Chono
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.)
Asahi Kasei Corp
Asahi Chemical Industry Co Ltd
Original Assignee
Asahi Chemical Industry Co Ltd
Asahi Kasei Kogyo KK
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 Asahi Chemical Industry Co Ltd, Asahi Kasei Kogyo KK filed Critical Asahi Chemical Industry Co Ltd
Priority to JP56056771A priority Critical patent/JPS57171953A/en
Publication of JPS57171953A publication Critical patent/JPS57171953A/en
Publication of JPS6247177B2 publication Critical patent/JPS6247177B2/ja
Granted legal-status Critical Current

Links

Classifications

    • 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
    • Y02P20/52—Improvements relating to the production of bulk chemicals using catalysts, e.g. selective catalysts

Landscapes

  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)

Abstract

PURPOSE: To obtain the bis-condensate of the titled ester useful as a precursor of pure MDI, etc., in high selectivity, by reacting N-phenylcarbamic acid ester with a methylene-introducing agent using a fluorinated carboxylic acid resin as a catalyst.
CONSTITUTION: Methylene-bis-(4-phenylcarbamic acid ester) is prepared by reacting an N-phenylcarbamic acid ester of formulaI(R is alkyl, etc.; R' is H, alkyl, etc.; r is integer of 0W4) with a methylene-introducing agent (e.g. HCHO) at 10W 200°C under normal pressure or positive pressure, using a catalyst comprising a fluorinated carboxylic acid resin containing at least one kind of monomer unit having the carboxylic acid group such as the group of formula II.
EFFECT: Since the fluorinated carboxylic acid resin catalyst is solid in contrast with a liquid acid catalyst such as hydrochloric acid, there are remarkable industrial merits; i.e. non-corrosiveness to the reaction apparatus, easy separation and recovery of the catalyst from the reaction liquid, easy performance of continuous reaction, free from discharge of waste acid solution, etc.
COPYRIGHT: (C)1982,JPO&Japio
JP56056771A 1981-04-15 1981-04-15 Improved method for condensing n-phenylcarbamic acid ester Granted JPS57171953A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56056771A JPS57171953A (en) 1981-04-15 1981-04-15 Improved method for condensing n-phenylcarbamic acid ester

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56056771A JPS57171953A (en) 1981-04-15 1981-04-15 Improved method for condensing n-phenylcarbamic acid ester

Publications (2)

Publication Number Publication Date
JPS57171953A true JPS57171953A (en) 1982-10-22
JPS6247177B2 JPS6247177B2 (en) 1987-10-06

Family

ID=13036735

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56056771A Granted JPS57171953A (en) 1981-04-15 1981-04-15 Improved method for condensing n-phenylcarbamic acid ester

Country Status (1)

Country Link
JP (1) JPS57171953A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5384424A (en) * 1991-06-26 1995-01-24 Lucky Limited Process for the selective preparation of 4,4-methylene-bis-(N-phenylalkylcarbamate)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5384424A (en) * 1991-06-26 1995-01-24 Lucky Limited Process for the selective preparation of 4,4-methylene-bis-(N-phenylalkylcarbamate)

Also Published As

Publication number Publication date
JPS6247177B2 (en) 1987-10-06

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