AT337669B - PROCESS FOR PURIFICATION OF DIPHENYLMETHANE-4,4'-DIISOCYANATE - Google Patents

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

Info

Publication number
AT337669B
AT337669B AT566075A AT566075A AT337669B AT 337669 B AT337669 B AT 337669B AT 566075 A AT566075 A AT 566075A AT 566075 A AT566075 A AT 566075A AT 337669 B AT337669 B AT 337669B
Authority
AT
Austria
Prior art keywords
diphenylmethane
diisocyanate
purification
Prior art date
Application number
AT566075A
Other languages
German (de)
Other versions
ATA566075A (en
Original Assignee
Shell Int Research
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 Shell Int Research filed Critical Shell Int Research
Publication of ATA566075A publication Critical patent/ATA566075A/en
Application granted granted Critical
Publication of AT337669B publication Critical patent/AT337669B/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)
AT566075A 1974-07-24 1975-07-22 PROCESS FOR PURIFICATION OF DIPHENYLMETHANE-4,4'-DIISOCYANATE AT337669B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3272174A GB1517162A (en) 1974-07-24 1974-07-24 Purification of diisocyanate

Publications (2)

Publication Number Publication Date
ATA566075A ATA566075A (en) 1976-11-15
AT337669B true AT337669B (en) 1977-07-11

Family

ID=10343032

Family Applications (1)

Application Number Title Priority Date Filing Date
AT566075A AT337669B (en) 1974-07-24 1975-07-22 PROCESS FOR PURIFICATION OF DIPHENYLMETHANE-4,4'-DIISOCYANATE

Country Status (12)

Country Link
JP (1) JPS5134137A (en)
AT (1) AT337669B (en)
BE (1) BE831413A (en)
BR (1) BR7504660A (en)
DD (1) DD118618A5 (en)
DE (1) DE2532722C2 (en)
ES (1) ES439618A1 (en)
FR (1) FR2279723A1 (en)
GB (1) GB1517162A (en)
IT (1) IT1039988B (en)
NL (1) NL7508717A (en)
SE (1) SE426167B (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4201066A (en) * 1978-03-29 1980-05-06 Damon Corporation Flexible shaft construction for a high inertia centrifuge
DE3329124A1 (en) * 1983-08-11 1985-02-28 Bayer Ag, 5090 Leverkusen METHOD FOR PURIFYING POLYISOCYANATES AND THE POLYISOCYANATES SO PURIFIED
DE3430022A1 (en) * 1984-08-16 1986-02-27 Bayer Ag, 5090 Leverkusen METHOD FOR OBTAINING PURE DIISOCYANATES
JPS62185917U (en) * 1986-05-20 1987-11-26
JPH0179269U (en) * 1987-11-18 1989-05-29
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
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
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
DE102004005319A1 (en) 2004-02-04 2005-08-25 Bayer Materialscience Ag Process for the preparation of high purity 2,4'-methylene diphenyl diisocyanate
JP2022170318A (en) * 2021-04-28 2022-11-10 旭化成株式会社 Method for producing isocyanate

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE756979A (en) * 1969-10-04 1971-03-16 Bayer Ag PROCESS FOR PURIFICATION OF DIPHENYLMETHANE-4,4 '-DIISOCYANATE

Also Published As

Publication number Publication date
DD118618A5 (en) 1976-03-12
BR7504660A (en) 1976-07-06
SE7508355L (en) 1976-01-26
BE831413A (en) 1976-01-16
DE2532722C2 (en) 1985-02-21
FR2279723B1 (en) 1977-12-09
JPS5134137A (en) 1976-03-23
SE426167B (en) 1982-12-13
ES439618A1 (en) 1977-01-16
JPS6123180B2 (en) 1986-06-04
AU8327375A (en) 1977-01-27
IT1039988B (en) 1979-12-10
GB1517162A (en) 1978-07-12
FR2279723A1 (en) 1976-02-20
NL7508717A (en) 1976-01-27
ATA566075A (en) 1976-11-15
DE2532722A1 (en) 1976-02-05

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Legal Events

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ELJ Ceased due to non-payment of the annual fee