JPS5218699B2 - - Google Patents

Info

Publication number
JPS5218699B2
JPS5218699B2 JP50055350A JP5535075A JPS5218699B2 JP S5218699 B2 JPS5218699 B2 JP S5218699B2 JP 50055350 A JP50055350 A JP 50055350A JP 5535075 A JP5535075 A JP 5535075A JP S5218699 B2 JPS5218699 B2 JP S5218699B2
Authority
JP
Japan
Legal status (The legal status 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 status listed.)
Expired
Application number
JP50055350A
Other versions
JPS50157346A (ja
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 filed Critical
Publication of JPS50157346A publication Critical patent/JPS50157346A/ja
Publication of JPS5218699B2 publication Critical patent/JPS5218699B2/ja
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
    • C08G18/72—Polyisocyanates or polyisothiocyanates
    • C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
    • C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
    • C08G18/7657—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings
    • C08G18/7664—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing alkylene polyphenyl groups
    • 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
JP50055350A 1974-05-09 1975-05-08 Expired JPS5218699B2 (ja)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US468246A US3912600A (en) 1974-05-09 1974-05-09 Recovery of polymethylene polyphenyl polyisocyanate from a phoshenosed polyamine feed

Publications (2)

Publication Number Publication Date
JPS50157346A JPS50157346A (ja) 1975-12-19
JPS5218699B2 true JPS5218699B2 (ja) 1977-05-24

Family

ID=23859029

Family Applications (1)

Application Number Title Priority Date Filing Date
JP50055350A Expired JPS5218699B2 (ja) 1974-05-09 1975-05-08

Country Status (11)

Country Link
US (1) US3912600A (ja)
JP (1) JPS5218699B2 (ja)
BR (1) BR7502764A (ja)
DD (1) DD118105A5 (ja)
DE (1) DE2515628B2 (ja)
ES (1) ES437487A1 (ja)
FR (1) FR2270276B1 (ja)
GB (1) GB1458323A (ja)
IT (1) IT1035443B (ja)
NL (1) NL171578C (ja)
SU (1) SU584763A3 (ja)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4189354A (en) * 1976-07-10 1980-02-19 Bayer Aktiengesellschaft Process for the production of diisocyanatodiphenyl methane isomers with an adjusted content of chlorine compounds
DE2631168B2 (de) * 1976-07-10 1979-03-08 Bayer Ag, 5090 Leverkusen Verfahren zur Herstellung von Diisocyanatodiphenylmethan-Isomeren mit einem eingestellten Gehalt an Chlorverbindungen
DE3145010A1 (de) * 1981-11-12 1983-05-19 Bayer Ag, 5090 Leverkusen Verfahren zur herstellung von 4,4'-diisocyanatodiphenylmethan
US4876380A (en) * 1988-08-31 1989-10-24 The Dow Chemical Company Color reduction of polymeric isocyanates via multiple solvent fractionation
US5202001A (en) * 1989-09-26 1993-04-13 Air Products And Chemicals, Inc. Preparation of urethane prepolymers having low levels of residual toluene diisocyanate
US5051152A (en) * 1989-09-26 1991-09-24 Air Products And Chemicals, Inc. Preparation of urethane prepolymers having low levels of residual toluene diisocyanate
US5185384A (en) * 1991-01-28 1993-02-09 The Dow Chemical Company Method for reducing hydrolyzable chloride in toluene diisocyanate
US5216042A (en) * 1991-07-10 1993-06-01 The Dow Chemical Company Process for preparing viscosity-stabilized reactive toluene diisocyanate distillation residues and blends thereof
DE4142769A1 (de) * 1991-12-23 1993-06-24 Bayer Hispania Ind S A Verfahren zur herstellung von isocyanaten und aufarbeitung des rueckstandes
US5312971A (en) * 1992-07-23 1994-05-17 Miles Inc. Color reduction of polymethylene polyphenyl polyisocyanates
SE9403929L (sv) * 1994-11-15 1996-05-16 Chematur Eng Ab Sätt vid fosgenering
US5942151A (en) * 1997-11-20 1999-08-24 Bayer Corporation Polymeric MDI color
DE10260082A1 (de) * 2002-12-19 2004-07-01 Basf Ag Verfahren zur kontinuierlichen Herstellung von Isocyanaten
DE10333929A1 (de) * 2003-07-25 2005-02-24 Bayer Materialscience Ag Herstellung von Mischungen von Di- und Polyisocyanaten der Diphenylmethanreihe mit hohen Gehalten an 4,4'-Methylendiphenyldiisocyanat und 2,4'-Methylendiphenyldiisocyanat
DE102004005320A1 (de) * 2004-02-04 2005-08-25 Bayer Materialscience Ag Herstellung von Di- und Polysocyanaten der Diphenylmethanreihe mit definierter Acidität
EP1831155A1 (de) * 2004-12-22 2007-09-12 Lanxess Deutschland GmbH Verfahren zur reduktion von chlorhaltigen komponenten in organischen isocyanaten
FR2925498B1 (fr) * 2007-12-21 2010-04-02 Rhodia Operations Procede de reduction de l'acidite residuelle d'isocyanatosilanes
JP2010120870A (ja) * 2008-11-18 2010-06-03 Nippon Polyurethane Ind Co Ltd メチレン架橋ポリフェニルポリイソシアネートの製造方法
US8907124B2 (en) 2010-11-17 2014-12-09 Basf Se Process for preparing methylenedi(phenyl isocyanate)
EP2640694B1 (de) 2010-11-17 2019-01-09 Basf Se Verfahren zur herstellung von methylendiphenyldiisocyanat
WO2018024711A1 (de) * 2016-08-04 2018-02-08 Covestro Deutschland Ag Verfahren zur regelung einer rektifikationskolonne

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1469105A (fr) * 1965-12-27 1967-02-10 Toulousaine De Prod Chim Toloc Procédé de fabrication d'esters isocyaniques
US3549504A (en) * 1966-05-05 1970-12-22 Takeda Chemical Industries Ltd Method for the purification of organic polyisocyanates by fractional distillation in presence of an inert gas or superheated vapor of an organic solvent
US3816496A (en) * 1972-01-03 1974-06-11 Olin Corp Solvent extraction and distillation technique for purification of organic isocyanates

Also Published As

Publication number Publication date
US3912600A (en) 1975-10-14
DE2515628B2 (de) 1979-03-15
NL171578B (nl) 1982-11-16
NL171578C (nl) 1983-04-18
IT1035443B (it) 1979-10-20
BR7502764A (pt) 1976-03-16
SU584763A3 (ru) 1977-12-15
ES437487A1 (es) 1977-04-16
DD118105A5 (ja) 1976-02-12
JPS50157346A (ja) 1975-12-19
FR2270276A1 (ja) 1975-12-05
GB1458323A (en) 1976-12-15
NL7505399A (nl) 1975-11-11
DE2515628A1 (de) 1975-11-20
FR2270276B1 (ja) 1979-10-05

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