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 COMPOUNDS

Info

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
Application number
BE179183A
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.)
Filing date
Publication date
Application filed by Bayer Ag filed Critical Bayer Ag
Publication of BE856617A publication Critical patent/BE856617A/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)
BE179183A 1976-07-10 1977-07-08 PROCESS FOR PREPARING ISOMERS OF DIISOCYANATODIPHENYL-METHANE WITH A DETERMINED CONTENT OF CHLORINE COMPOUNDS BE856617A (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

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