FR2378749A1 - Procede de preparation d'isocyanates aliphatiques par decomposition thermique d'halogenures d'acides carbamiques aliphatiques - Google Patents

Procede de preparation d'isocyanates aliphatiques par decomposition thermique d'halogenures d'acides carbamiques aliphatiques

Info

Publication number
FR2378749A1
FR2378749A1 FR7802357A FR7802357A FR2378749A1 FR 2378749 A1 FR2378749 A1 FR 2378749A1 FR 7802357 A FR7802357 A FR 7802357A FR 7802357 A FR7802357 A FR 7802357A FR 2378749 A1 FR2378749 A1 FR 2378749A1
Authority
FR
France
Prior art keywords
aliphatic
thermal decomposition
preparation
carbamic acid
cycloaliphatic
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
FR7802357A
Other languages
English (en)
Other versions
FR2378749B1 (fr
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.)
BASF SE
Original Assignee
BASF SE
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 BASF SE filed Critical BASF SE
Publication of FR2378749A1 publication Critical patent/FR2378749A1/fr
Application granted granted Critical
Publication of FR2378749B1 publication Critical patent/FR2378749B1/fr
Granted legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C263/00—Preparation of derivatives of isocyanic acid
    • C07C263/04—Preparation of derivatives of isocyanic acid from or via carbamates or carbamoyl halides
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C2601/00—Systems containing only non-condensed rings
    • C07C2601/12—Systems containing only non-condensed rings with a six-membered ring
    • C07C2601/14—The ring being saturated

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

La présente invention a pour objet un procédé de préparation d'isocyanates aliphatiques ou cycloaliphatiques de formule : R-N=C=O où R représente un reste aliphatique en C1 à C10 ou un reste cycloaliphatique en C5 à C12 , par décomposition thermique d'halogénures d'acides carbamiques aliphatiques ou cycloaliphatiques. La décomposition thermique des chlorures d'acide carbamique est mise en oeuvre en présence d'un solvant organique inerte dont le point d'ébullition est inférieur à celui de l'isocyanate formé. La décomposition est effectuée dans un récipient de réaction muni d'un dispositif de rectification surmonté d'un réfrigérant à reflux, l'isocyanate formé étant condensé dans le dispositif de rectification à une température supérieure à la température d'ébullition du solvant
FR7802357A 1977-01-27 1978-01-27 Procede de preparation d'isocyanates aliphatiques par decomposition thermique d'halogenures d'acides carbamiques aliphatiques Granted FR2378749A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19772703281 DE2703281A1 (de) 1977-01-27 1977-01-27 Verfahren zur herstellung von aliphatischen isocyanaten

Publications (2)

Publication Number Publication Date
FR2378749A1 true FR2378749A1 (fr) 1978-08-25
FR2378749B1 FR2378749B1 (fr) 1983-09-30

Family

ID=5999663

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7802357A Granted FR2378749A1 (fr) 1977-01-27 1978-01-27 Procede de preparation d'isocyanates aliphatiques par decomposition thermique d'halogenures d'acides carbamiques aliphatiques

Country Status (6)

Country Link
US (1) US4162263A (fr)
JP (1) JPS5395915A (fr)
BE (1) BE863292A (fr)
DE (1) DE2703281A1 (fr)
FR (1) FR2378749A1 (fr)
GB (1) GB1593952A (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4124671A1 (de) * 1991-07-25 1993-01-28 Basf Ag Reaktor und verfahren zur thermischen spaltung von carbamidsaeureestern
CN102976976B (zh) * 2012-11-29 2014-11-26 湖南化工研究院 一种甲基异氰酸酯的制备方法

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1193034B (de) * 1963-07-12 1965-05-20 Bayer Ag Verfahren und Vorrichtung zur Herstellung von Alkylisocyanaten
FR1400863A (fr) * 1963-07-12 1965-05-28 Bayer Ag Procédé et dispositif de préparation d'isocyanates d'alkyle
DE2210285A1 (de) * 1972-03-03 1973-09-06 Basf Ag Verfahren zur herstellung von isocyanaten
DE2411442A1 (de) * 1974-03-11 1975-10-02 Basf Ag Verfahren zur herstellung von aliphatischen isocyanaten
FR2264007A1 (fr) * 1974-03-11 1975-10-10 Basf Ag
FR2270240A1 (fr) * 1974-05-08 1975-12-05 Basf Ag
DE2503270A1 (de) * 1975-01-28 1976-07-29 Basf Ag Verfahren zur herstellung von aliphatischen isocyanaten

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4082787A (en) * 1977-01-03 1978-04-04 E. I. Du Pont De Nemours And Company Methyl isocyanate process

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1193034B (de) * 1963-07-12 1965-05-20 Bayer Ag Verfahren und Vorrichtung zur Herstellung von Alkylisocyanaten
FR1400863A (fr) * 1963-07-12 1965-05-28 Bayer Ag Procédé et dispositif de préparation d'isocyanates d'alkyle
DE2210285A1 (de) * 1972-03-03 1973-09-06 Basf Ag Verfahren zur herstellung von isocyanaten
DE2411442A1 (de) * 1974-03-11 1975-10-02 Basf Ag Verfahren zur herstellung von aliphatischen isocyanaten
FR2264008A1 (fr) * 1974-03-11 1975-10-10 Basf Ag
FR2264007A1 (fr) * 1974-03-11 1975-10-10 Basf Ag
FR2270240A1 (fr) * 1974-05-08 1975-12-05 Basf Ag
DE2503270A1 (de) * 1975-01-28 1976-07-29 Basf Ag Verfahren zur herstellung von aliphatischen isocyanaten

Also Published As

Publication number Publication date
JPS5395915A (en) 1978-08-22
BE863292A (fr) 1978-07-25
DE2703281A1 (de) 1978-08-03
US4162263A (en) 1979-07-24
GB1593952A (en) 1981-07-22
FR2378749B1 (fr) 1983-09-30

Similar Documents

Publication Publication Date Title
US5294740A (en) Preparation of formic acid by thermal cleavage of quaternary ammonium formates
FR2359812A1 (fr) Procede de preparation d'oxalates dedialcoyle
US4883612A (en) Preparation of para-acyloxybenzene sulfonates
US4764309A (en) Preparation of chlorocarboxylic acid chlorides
CA1156257A (fr) Methode de preparation de 2-chloropropionate d'alkyle
US5196611A (en) Preparation of alkyl, alkenyl, and alkynyl chlorides
FR2378749A1 (fr) Procede de preparation d'isocyanates aliphatiques par decomposition thermique d'halogenures d'acides carbamiques aliphatiques
US6222060B1 (en) Process for preparing o-(carboalkoxy)phenylmethanesulfonyl chloride derivatives
GB798148A (en) Improvements in preparation of p-nitrodiphenylamine
US4379928A (en) Synthesis of amides
US3161676A (en) Preparation of substituted alkyl ureas
Breederveld The chemistry of the N‐alkylaldimines. II. The reaction of N‐propylpropanaldimine with acid chlorides
US4806286A (en) Process for the preparation of acid chlorides by phosgenation of acids, and catalysts for this process
Heller Preparation of 3-fluorophthalic anhydride
US4233450A (en) Preparation of oxazolidine-2,4-diones
US4146724A (en) Process for the manufacture of isopropyl 4-methylimidazole-5-carboxylate
US4085129A (en) Process for the preparation of chloroformic acid aryl esters and cyclic carbonates
EP0268820A2 (fr) Procédé pour la préparation de dérivés de 2-acylfuranne
SU799644A3 (ru) Способ получени монохлор-пиНАКОлиНА
FURUKAWA et al. Reaction of vinyl ethers with acidic imino compounds. A new synthesis of some N-vinyl imides
Gillis Cyclic sulfites and the Bissinger rearrangement
US3746757A (en) Process for manufacturing 6-nitro-2-oximinohexanoic acid derivatives
US4199527A (en) Removal of ketene impurities in the preparation of alpha-cyano-aryloxybenzyl alcohols
SU418469A1 (ru) Способ получения производных перфторкарбоновых кислот
US3032587A (en) Process for the preparation of n-alkyl-1,1 dihydroheptafluorobutylamines

Legal Events

Date Code Title Description
ST Notification of lapse