AT337669B - PROCESS FOR PURIFICATION OF DIPHENYLMETHANE-4,4'-DIISOCYANATE - Google Patents
PROCESS FOR PURIFICATION OF DIPHENYLMETHANE-4,4'-DIISOCYANATEInfo
- 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
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)
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 (8)
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 | ||
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 |
Family Cites Families (1)
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 |
-
1974
- 1974-07-24 GB GB3272174A patent/GB1517162A/en not_active Expired
-
1975
- 1975-07-16 BE BE1006784A patent/BE831413A/en not_active IP Right Cessation
- 1975-07-22 SE SE7508355A patent/SE426167B/en not_active IP Right Cessation
- 1975-07-22 DD DD18741575A patent/DD118618A5/xx unknown
- 1975-07-22 IT IT2565375A patent/IT1039988B/en active
- 1975-07-22 NL NL7508717A patent/NL7508717A/en not_active Application Discontinuation
- 1975-07-22 FR FR7522790A patent/FR2279723A1/en active Granted
- 1975-07-22 BR BR7504660A patent/BR7504660A/en unknown
- 1975-07-22 JP JP8893975A patent/JPS5134137A/en active Granted
- 1975-07-22 DE DE19752532722 patent/DE2532722C2/en not_active Expired
- 1975-07-22 ES ES439618A patent/ES439618A1/en not_active Expired
- 1975-07-22 AT AT566075A patent/AT337669B/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
JPS6123180B2 (en) | 1986-06-04 |
JPS5134137A (en) | 1976-03-23 |
NL7508717A (en) | 1976-01-27 |
FR2279723A1 (en) | 1976-02-20 |
ATA566075A (en) | 1976-11-15 |
DE2532722A1 (en) | 1976-02-05 |
BE831413A (en) | 1976-01-16 |
ES439618A1 (en) | 1977-01-16 |
GB1517162A (en) | 1978-07-12 |
IT1039988B (en) | 1979-12-10 |
DE2532722C2 (en) | 1985-02-21 |
BR7504660A (en) | 1976-07-06 |
FR2279723B1 (en) | 1977-12-09 |
SE426167B (en) | 1982-12-13 |
SE7508355L (en) | 1976-01-26 |
DD118618A5 (en) | 1976-03-12 |
AU8327375A (en) | 1977-01-27 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ELJ | Ceased due to non-payment of the annual fee |