BE856617A - PROCESS FOR PREPARING ISOMERS OF DIISOCYANATODIPHENYL-METHANE WITH A DETERMINED CONTENT OF CHLORINE COMPOUNDS - Google Patents
PROCESS FOR PREPARING ISOMERS OF DIISOCYANATODIPHENYL-METHANE WITH A DETERMINED CONTENT OF CHLORINE COMPOUNDSInfo
- Publication number
- BE856617A BE856617A BE179183A BE179183A BE856617A BE 856617 A BE856617 A BE 856617A BE 179183 A BE179183 A BE 179183A BE 179183 A BE179183 A BE 179183A BE 856617 A BE856617 A BE 856617A
- Authority
- BE
- Belgium
- Prior art keywords
- diisocyanatodiphenyl
- methane
- chlorine compounds
- determined content
- preparing isomers
- 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 |
---|---|---|---|
DE19762631168 DE2631168B2 (en) | 1976-07-10 | 1976-07-10 | Process for the preparation of diisocyanatodiphenylmethane isomers with an adjusted content of chlorine compounds |
Publications (1)
Publication Number | Publication Date |
---|---|
BE856617A true BE856617A (en) | 1978-01-09 |
Family
ID=5982715
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BE179183A BE856617A (en) | 1976-07-10 | 1977-07-08 | PROCESS FOR PREPARING ISOMERS OF DIISOCYANATODIPHENYL-METHANE WITH A DETERMINED CONTENT OF CHLORINE COMPOUNDS |
Country Status (6)
Country | Link |
---|---|
JP (1) | JPS539750A (en) |
BE (1) | BE856617A (en) |
DE (1) | DE2631168B2 (en) |
ES (1) | ES460560A1 (en) |
FR (1) | FR2357532A1 (en) |
GB (1) | GB1570741A (en) |
Families Citing this family (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS54102321A (en) * | 1978-01-31 | 1979-08-11 | Ricoh Kk | Removing bubbles in lens bonding |
JPS54103415A (en) * | 1978-01-31 | 1979-08-14 | Ricoh Kk | Lens bonding |
JPS54102320A (en) * | 1978-01-31 | 1979-08-11 | Ricoh Kk | Lens bonding and apparatus therefor |
DE2935318A1 (en) * | 1979-08-31 | 1981-03-26 | Bayer Ag, 51373 Leverkusen | NEW DIISOCYANATES OR DIISOCYANATE MIXTURES OF THE DIPHENYLMETHANE SERIES, METHOD FOR THE PRODUCTION THEREOF, AND THEIR USE AS CONSTRUCTION COMPONENT IN THE PRODUCTION OF POLYURETHANE PLASTICS BY THE ISOCYANATE POLYADDITION METHOD |
JPH02311452A (en) * | 1989-05-26 | 1990-12-27 | Daicel Chem Ind Ltd | Diisocyanate compound |
JP2875877B2 (en) * | 1990-10-23 | 1999-03-31 | 三井化学株式会社 | Method for producing methylene-crosslinked polyphenylene polyisocyanate |
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 |
EP1475367B1 (en) * | 2003-05-08 | 2010-07-07 | Bayer MaterialScience AG | Distillation process for separating diisocyanatodiphenylmethane isomers |
DE102004005319A1 (en) * | 2004-02-04 | 2005-08-25 | Bayer Materialscience Ag | Process for the preparation of high purity 2,4'-methylene diphenyl diisocyanate |
DE102005004170A1 (en) * | 2005-01-29 | 2006-08-03 | Bayer Materialscience Ag | Process for the distillation of a mixture of isomeric diisocyanatodiphenylmethanes |
DE102005026864A1 (en) | 2005-06-10 | 2006-12-14 | Bayer Materialscience Ag | Process for the preparation of 4,4'-diphenylmethane diisocyanate |
DE102005053065A1 (en) * | 2005-11-04 | 2007-05-10 | Basf Ag | Process for the preparation of polyisocyanate mixtures |
CN103298781B (en) | 2010-11-17 | 2015-04-22 | 巴斯夫欧洲公司 | Process for preparing methylene diphenyl diisocyanate |
BR112013012096A2 (en) | 2010-11-17 | 2016-08-16 | Basf Se | method for the purification of mixtures |
KR101903205B1 (en) | 2010-11-17 | 2018-10-01 | 바스프 에스이 | Method for purifying mixtures comprising 4,4'-methylenediphenyl diisocyanate |
US8907124B2 (en) | 2010-11-17 | 2014-12-09 | Basf Se | Process for preparing methylenedi(phenyl isocyanate) |
US9505711B2 (en) | 2010-11-17 | 2016-11-29 | Basf Se | Method for purifying mixtures comprising 4,4′-methylenediphenyl diisocyanate |
JP2015010183A (en) * | 2013-06-28 | 2015-01-19 | 旭化成ケミカルズ株式会社 | Diisocyanate composition |
CN107207422B (en) | 2015-01-30 | 2020-12-11 | 巴斯夫欧洲公司 | Low by-product polyphenylene polymethylene polyisocyanate |
EP3498689A1 (en) | 2017-12-14 | 2019-06-19 | Sulzer Chemtech AG | A plant and method for purifying an isomeric monomer, such as 4,4'-methylene diphenyl diisocyanate, from a crude mixture |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3219678A (en) * | 1963-02-28 | 1965-11-23 | Olin Mathieson | Process for reducing the hydrolyzable chlorine content of organic isocyanates |
GB1194459A (en) * | 1967-10-31 | 1970-06-10 | Takeda Chemical Industries Ltd | Method for the Purification of Isocyanates |
GB1398975A (en) * | 1971-08-16 | 1975-06-25 | Ici Ltd | Heat treatment and distillation of methylene bridged polyphenyl polyisocyanates |
GB1384065A (en) * | 1971-11-30 | 1975-02-19 | Ici Ltd | Process for the purification of organic isocyanates |
US3853936A (en) * | 1973-02-05 | 1974-12-10 | Olin Corp | Process for distillation of toluene diisocyanate |
US3912600A (en) * | 1974-05-09 | 1975-10-14 | Upjohn Co | Recovery of polymethylene polyphenyl polyisocyanate from a phoshenosed polyamine feed |
-
1976
- 1976-07-10 DE DE19762631168 patent/DE2631168B2/en not_active Ceased
-
1977
- 1977-07-07 GB GB2851477A patent/GB1570741A/en not_active Expired
- 1977-07-08 FR FR7721174A patent/FR2357532A1/en active Granted
- 1977-07-08 JP JP8111477A patent/JPS539750A/en active Pending
- 1977-07-08 BE BE179183A patent/BE856617A/en not_active IP Right Cessation
- 1977-07-08 ES ES460560A patent/ES460560A1/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
ES460560A1 (en) | 1978-05-16 |
GB1570741A (en) | 1980-07-09 |
JPS539750A (en) | 1978-01-28 |
DE2631168A1 (en) | 1978-01-12 |
FR2357532B1 (en) | 1980-10-17 |
DE2631168B2 (en) | 1979-03-08 |
FR2357532A1 (en) | 1978-02-03 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
RE | Patent lapsed |
Owner name: BAYER A.G. Effective date: 19840708 |