[go: up one dir, main page]

GB979259A - A process for the preparation of organic isocyanates - Google Patents

A process for the preparation of organic isocyanates

Info

Publication number
GB979259A
GB979259A GB48904/62A GB4890462A GB979259A GB 979259 A GB979259 A GB 979259A GB 48904/62 A GB48904/62 A GB 48904/62A GB 4890462 A GB4890462 A GB 4890462A GB 979259 A GB979259 A GB 979259A
Authority
GB
United Kingdom
Prior art keywords
phosgene
slurry
isocyanates
isocyanate
excess
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
GB48904/62A
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.)
Bayer Corp
Original Assignee
Mobay Corp
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 Mobay Corp filed Critical Mobay Corp
Publication of GB979259A publication Critical patent/GB979259A/en
Expired 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
    • C07C263/10—Preparation of derivatives of isocyanic acid by reaction of amines with carbonyl halides, e.g. with phosgene
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C263/00—Preparation of derivatives of isocyanic acid
    • C07C263/18—Separation; Purification; Stabilisation; Use of additives
    • C07C263/20—Separation; Purification
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C265/00—Derivatives of isocyanic acid
    • C07C265/14—Derivatives of isocyanic acid containing at least two isocyanate groups bound to the same carbon skeleton

Landscapes

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

Abstract

Isocyanates are prepared by reacting an amine with excess phosgene to form a carbamyl chloride-amine hydrochloride slurry, concentrating the slurry by dividing it, without distillation, into a high-solids content portion and a portion free of or with a low content of solids, heating the concentrated slurry, if desired after adding additional phosgene, to form the isocyanate, e.g. at at least 78 DEG C., and recycling excess phosgene to the first phosgenation step. An excess of phosgene of 10-600% is preferably used. Examples prepare toluylene-2, 4-diisocyanate, a mixture of toluylene-2, 4- and -2, 6-diisocyanates, p-chlorophenyl isocyanate, 4, 41-di-(isocyanatophenyl)-methane and phenyl isocyanate. Many other isocyanates are listed.
GB48904/62A 1962-01-02 1962-12-28 A process for the preparation of organic isocyanates Expired GB979259A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US16386562A 1962-01-02 1962-01-02

Publications (1)

Publication Number Publication Date
GB979259A true GB979259A (en) 1965-01-01

Family

ID=22591915

Family Applications (1)

Application Number Title Priority Date Filing Date
GB48904/62A Expired GB979259A (en) 1962-01-02 1962-12-28 A process for the preparation of organic isocyanates

Country Status (1)

Country Link
GB (1) GB979259A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1493360B1 (en) * 1965-03-09 1970-01-15 Upjohn Co Process for the preparation of aliphatic, cycloaliphatic or araliphatic polyisocyanates low in chlorine-containing impurities

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1493360B1 (en) * 1965-03-09 1970-01-15 Upjohn Co Process for the preparation of aliphatic, cycloaliphatic or araliphatic polyisocyanates low in chlorine-containing impurities

Similar Documents

Publication Publication Date Title
ES444780A1 (en) Polyisocyanates which contain carbodiimide groups and which are stable in storage
ES453465A1 (en) Process for the production of polyisocyanates which contain carbodiimide groups and which are stable in storage
ATE3032T1 (en) PROCESS FOR THE PREPARATION OF N,ODI-SUBSTITUTED URETHANES.
ATE2137T1 (en) PROCESSES FOR THE PRODUCTION OF ALIPHATIC AND CYCLOALIPHATIC DI- AND POLYURETHANES.
GB738480A (en) Diisocyanate-modified polyester or polyesteramide elastomers
GB1108190A (en) Novel isocyanate compositions and process
AU538536B2 (en) Preparation of urethanes
GB1474984A (en) Isocyanates
GB901377A (en) The preparation of organic isocyanates
IE44472L (en) Producing urethanes
GB979259A (en) A process for the preparation of organic isocyanates
RO79648A (en) PROCESS OF OBTAINING POLYURETHANE ELASTOMERS
GB1423993A (en) Process for the crystallisation of diphenylmethane diisocyanate from a crude undistilled polyisocyanate mixture
ES458388A1 (en) Process for the preparation of polyisocyanates having biuret groups
ES462358A1 (en) Process for the preparation of polyisocyanates containing urethane and biuret groups
GB908949A (en) Improvements in or relating to the manufacture of polymers
SE7612592L (en) WAY TO PREPARE STABLE DISPERSIONS
ES8207134A1 (en) Process for the preparation of N,O-disubstituted urethanes, and their use as raw materials in the manufacture of isocyanates.
ES258026A1 (en) Certain 1-arylsulfonyl-3-(cis-2-decalyl)ureas
ES443399A1 (en) PROCEDURE TO PREPARE AN ORGANIC ISOCYANATE.
GB1321930A (en) Process for the preparation of stable polyisocyanates which contain biuret groups
GB1057428A (en) Polyurethane articles
ES404894A1 (en) PROCEDURE FOR THE PREPARATION OF POLYURETHANE ELASTOMER POLYMERS.
GB980277A (en) Improvements in or relating to preparation of cyclic amines
GB893729A (en) Improvements in and relating to the preparation of aromatic isocyanates