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BE756979A - PROCESS FOR PURIFICATION OF DIPHENYLMETHANE-4,4 '-DIISOCYANATE - Google Patents

PROCESS FOR PURIFICATION OF DIPHENYLMETHANE-4,4 '-DIISOCYANATE

Info

Publication number
BE756979A
BE756979A BE756979DA BE756979A BE 756979 A BE756979 A BE 756979A BE 756979D A BE756979D A BE 756979DA BE 756979 A BE756979 A BE 756979A
Authority
BE
Belgium
Prior art keywords
diphenylmethane
diisocyanate
purification
Prior art date
Application number
Other languages
French (fr)
Original Assignee
Bayer Ag
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.)
Publication date
Publication of BE756979A publication Critical patent/BE756979A/en

Links

Classifications

    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Polyurethanes Or Polyureas (AREA)
BE756979D 1969-10-04 PROCESS FOR PURIFICATION OF DIPHENYLMETHANE-4,4 '-DIISOCYANATE BE756979A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19691950101 DE1950101A1 (en) 1969-10-04 1969-10-04 Process for the purification of diphenyl methane-4,4'-diisocyanate

Publications (1)

Publication Number Publication Date
BE756979A true BE756979A (en) 1971-03-16

Family

ID=5747301

Family Applications (1)

Application Number Title Priority Date Filing Date
BE756979D BE756979A (en) 1969-10-04 PROCESS FOR PURIFICATION OF DIPHENYLMETHANE-4,4 '-DIISOCYANATE

Country Status (4)

Country Link
AU (1) AU2062170A (en)
BE (1) BE756979A (en)
DE (1) DE1950101A1 (en)
FR (1) FR2064979A5 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1517162A (en) * 1974-07-24 1978-07-12 Shell Int Research Purification of diisocyanate
DE19914291A1 (en) 1999-03-30 2000-10-05 Bayer Ag Process for the purification of a low molecular isocyanate, comprises addition of an oligomeric organic polyphosphate compound and heating for ten minutes below two hundred degrees
DE19914292A1 (en) 1999-03-30 2000-10-05 Bayer Ag Reduction of the chorine content of low molecular isocyanates comprises reaction with a tertiary or quaternary amine group containing anion exchanger for ten minutes at less than two hundred degrees
DE19922572A1 (en) 1999-05-17 2000-11-23 Bayer Ag Process for the purification of organic isocyanates, the organic isocyanates thus purified and their use

Also Published As

Publication number Publication date
DE1950101A1 (en) 1971-04-08
AU2062170A (en) 1972-04-13
FR2064979A5 (en) 1971-07-23

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