JPS57159751A - Preparation of isocyanate - Google Patents

Preparation of isocyanate

Info

Publication number
JPS57159751A
JPS57159751A JP56044113A JP4411381A JPS57159751A JP S57159751 A JPS57159751 A JP S57159751A JP 56044113 A JP56044113 A JP 56044113A JP 4411381 A JP4411381 A JP 4411381A JP S57159751 A JPS57159751 A JP S57159751A
Authority
JP
Japan
Prior art keywords
isocyanate
bismuth
oxides
rare earth
thermal decomposition
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
JP56044113A
Other languages
Japanese (ja)
Other versions
JPS6338986B2 (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 JP56044113A priority Critical patent/JPS57159751A/en
Publication of JPS57159751A publication Critical patent/JPS57159751A/en
Publication of JPS6338986B2 publication Critical patent/JPS6338986B2/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

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

Abstract

PURPOSE: To prepare the titled compound useful as a raw material of polyurethane and carbamate pesticides, etc., by the thermal decomposition of a carbamic acid ester in the pesence of a catalyst containing element of rare earth matal, animony or bismuth, or their oxides, etc.
CONSTITUTION: An isocyanate is prepared by the thermal decomposition of a carbamic acid ester (e.g. methyl carbanylate, tricarbamic acid methyl ester, etc.) in a solvent inert to the isocyanate (e.g. hexane, heptane, etc.) preferably at 100W350°C, in the presence of a catalyst containing one or more substances selected from elementary rare earth metals (e.g. Sc, Y, La, etc.), antimony or bismuth, their oxides (e.g. LaAlO3, Sb2O3, Bi2O3, etc.), sulfides, and salts.
EFFECT: The side reaction of producing high-boiling substance can be suppressed, and the objective compound can be obtained in high yield.
COPYRIGHT: (C)1982,JPO&Japio
JP56044113A 1981-03-27 1981-03-27 Preparation of isocyanate Granted JPS57159751A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56044113A JPS57159751A (en) 1981-03-27 1981-03-27 Preparation of isocyanate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56044113A JPS57159751A (en) 1981-03-27 1981-03-27 Preparation of isocyanate

Publications (2)

Publication Number Publication Date
JPS57159751A true JPS57159751A (en) 1982-10-01
JPS6338986B2 JPS6338986B2 (en) 1988-08-03

Family

ID=12682544

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56044113A Granted JPS57159751A (en) 1981-03-27 1981-03-27 Preparation of isocyanate

Country Status (1)

Country Link
JP (1) JPS57159751A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59153962U (en) * 1983-03-31 1984-10-16 三菱重工業株式会社 folding machine
EP0555628A2 (en) * 1992-01-10 1993-08-18 Nippon Shokubai Co., Ltd. Process for preparing isocyanates
CN102276501A (en) * 2009-12-31 2011-12-14 中国科学院成都有机化学有限公司 Method for preparing isocyanate through catalytic decomposition of aryl (alkyl) carbamic acid ester
JP2016196498A (en) * 2011-07-13 2016-11-24 宇部興産株式会社 Method for producing isocyanate compound
WO2018212208A1 (en) 2017-05-15 2018-11-22 旭化成株式会社 Isocyanate production method

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57158746A (en) * 1981-03-25 1982-09-30 Asahi Chem Ind Co Ltd Preparation of isocyanate

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57158746A (en) * 1981-03-25 1982-09-30 Asahi Chem Ind Co Ltd Preparation of isocyanate

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59153962U (en) * 1983-03-31 1984-10-16 三菱重工業株式会社 folding machine
EP0555628A2 (en) * 1992-01-10 1993-08-18 Nippon Shokubai Co., Ltd. Process for preparing isocyanates
EP0555628A3 (en) * 1992-01-10 1995-01-18 Nippon Catalytic Chem Ind Process for preparing isocyanates
CN102276501A (en) * 2009-12-31 2011-12-14 中国科学院成都有机化学有限公司 Method for preparing isocyanate through catalytic decomposition of aryl (alkyl) carbamic acid ester
JP2016196498A (en) * 2011-07-13 2016-11-24 宇部興産株式会社 Method for producing isocyanate compound
WO2018212208A1 (en) 2017-05-15 2018-11-22 旭化成株式会社 Isocyanate production method

Also Published As

Publication number Publication date
JPS6338986B2 (en) 1988-08-03

Similar Documents

Publication Publication Date Title
JPS55102583A (en) 20-acyloxy-20-demethylmaytansinoid compound
JPS57158747A (en) Preparation of isocyanate
JPS57159751A (en) Preparation of isocyanate
JPS5488201A (en) Preparation of isocyanate from carbamic acid esters
JPS57136579A (en) Thiazolylurea derivative, its preparation, and pharmaceutical composition containing the same
DE3060471D1 (en) N-methyl-0-pyrazol(4)yl-carbamic acid esters, process for their synthesis and their use as pesticides
JPS5566586A (en) Novel maytansinoid compound and its preparation
JPS56161353A (en) Enol carbonate of acetoacetic ester
JPS57158746A (en) Preparation of isocyanate
DE2960269D1 (en) 2-cyclopropyl-pyrimidin(4)yl-thionophosphonic acid esters, process for their production, their utilisation as insecticides and acaricides, pesticidal compositions containing these compounds and process for the production of the pesticidal compositions
JPS5439002A (en) Preparation of isocyanates
JPS57158748A (en) Preparation of isocyanate
JPS53112855A (en) Preparation of alicyclic urethane containing fluoroalkyl group
JPS57112352A (en) Preparation of phenylacetic acid alkyl ester
IE46287L (en) Production of haloacylamides
JPS5585564A (en) Preparation of beta-trifluoromethylpyridine
JPS5738799A (en) 25-hydroxy-3,24-dioxocholesta-1,4,6-trienes and their preparations
JPS55160740A (en) Preparation of cyclopentenolone
DE2430207A1 (en) SCHAEDLINGS KEMPKINKAGEMANS / ITS ACTIVE INGREDIENTS
JPS57120570A (en) Preparation of 1,3-dialkyl-2-imidazolidinone
JPS5651489A (en) Triazine-dione compound and herbicide
JPS5350187A (en) Preparation of plyisocyanates
JPS52105115A (en) Preparation of acrylic ester dimer
JPS53130623A (en) Preparation of n-hydroxyalkyl-substituted phosphoroamidate
JPS55335A (en) Pantethine homologue and its preparation