BE756979A - PROCESS FOR PURIFICATION OF DIPHENYLMETHANE-4,4 '-DIISOCYANATE - Google Patents
PROCESS FOR PURIFICATION OF DIPHENYLMETHANE-4,4 '-DIISOCYANATEInfo
- 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
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)
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1517162A (en) * | 1974-07-24 | 1978-07-12 | Shell Int Research | Purification of diisocyanate |
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 |
-
0
- BE BE756979D patent/BE756979A/en unknown
-
1969
- 1969-10-04 DE DE19691950101 patent/DE1950101A1/en active Pending
-
1970
- 1970-10-02 AU AU20621/70A patent/AU2062170A/en not_active Expired
- 1970-10-02 FR FR7035776A patent/FR2064979A5/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
AU2062170A (en) | 1972-04-13 |
FR2064979A5 (en) | 1971-07-23 |
DE1950101A1 (en) | 1971-04-08 |
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