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GB1088205A - Diisocyanate manufacture - Google Patents

Diisocyanate manufacture

Info

Publication number
GB1088205A
GB1088205A GB1885964A GB1885964A GB1088205A GB 1088205 A GB1088205 A GB 1088205A GB 1885964 A GB1885964 A GB 1885964A GB 1885964 A GB1885964 A GB 1885964A GB 1088205 A GB1088205 A GB 1088205A
Authority
GB
United Kingdom
Prior art keywords
monohydrochloride
mols
produced
diisocyanate
separated
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
GB1885964A
Inventor
John Alwyn Hall
Rae Hulse
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.)
Imperial Chemical Industries Ltd
Original Assignee
Imperial Chemical Industries Ltd
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
Priority to NL125829D priority Critical patent/NL125829C/xx
Application filed by Imperial Chemical Industries Ltd filed Critical Imperial Chemical Industries Ltd
Priority to GB1885964A priority patent/GB1088205A/en
Priority to SE589365A priority patent/SE308103B/xx
Priority to NL6505782A priority patent/NL6505782A/xx
Priority to FR16121A priority patent/FR1432358A/en
Publication of GB1088205A publication Critical patent/GB1088205A/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
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
    • C08G18/72—Polyisocyanates or polyisothiocyanates
    • C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
    • C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
    • C08G18/7657—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings
    • C08G18/7664—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing alkylene polyphenyl groups
    • C08G18/7671—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing alkylene polyphenyl groups containing only one alkylene bisphenyl group

Landscapes

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

Abstract

4,41 - Diisocyanatodiphenylmethane is produced by a process in which (1) 2-4 mols. of aniline are condensed with 1 mol. of formaldehyde in the presence of 1-4 mols. of acid at a raised temperature, (2) the monohydrochloride of the 4,41-diamino-diphenylmethane so produced is separated, (3) the dried separated monohydrochloride or the diamine regenerated therefrom is treated with an excess of phosgene at a temperature below 50 DEG C. and (4) the conversion to diisocyanate is completed at a temperature above 50 DEG C. but not above 120 DEG C. The phosgenation may be effected in an inert solvent, e.g. 0-dichlorobenzene, monochlorobenzene, xylene, toluene, ethyl acetate, butyl acetate or methyl isopropyl ketone. Examples are given.
GB1885964A 1964-05-06 1964-05-06 Diisocyanate manufacture Expired GB1088205A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
NL125829D NL125829C (en) 1964-05-06
GB1885964A GB1088205A (en) 1964-05-06 1964-05-06 Diisocyanate manufacture
SE589365A SE308103B (en) 1964-05-06 1965-05-05
NL6505782A NL6505782A (en) 1964-05-06 1965-05-06
FR16121A FR1432358A (en) 1964-05-06 1965-05-06 Manufacturing process of diisocyanates

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1885964A GB1088205A (en) 1964-05-06 1964-05-06 Diisocyanate manufacture

Publications (1)

Publication Number Publication Date
GB1088205A true GB1088205A (en) 1967-10-25

Family

ID=10119639

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1885964A Expired GB1088205A (en) 1964-05-06 1964-05-06 Diisocyanate manufacture

Country Status (3)

Country Link
GB (1) GB1088205A (en)
NL (2) NL6505782A (en)
SE (1) SE308103B (en)

Also Published As

Publication number Publication date
NL6505782A (en) 1965-11-08
SE308103B (en) 1969-02-03
NL125829C (en)

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