IT1035443B - Perfezionamento nel procediamento di produzione di poliisocianati in particolare per ridurre la aciditane il contenuto di cloruro idrolizzabile in polimetilene e polifenilpolifenipoliisocianati - Google Patents

Perfezionamento nel procediamento di produzione di poliisocianati in particolare per ridurre la aciditane il contenuto di cloruro idrolizzabile in polimetilene e polifenilpolifenipoliisocianati

Info

Publication number
IT1035443B
IT1035443B IT49268/75A IT4926875A IT1035443B IT 1035443 B IT1035443 B IT 1035443B IT 49268/75 A IT49268/75 A IT 49268/75A IT 4926875 A IT4926875 A IT 4926875A IT 1035443 B IT1035443 B IT 1035443B
Authority
IT
Italy
Prior art keywords
polyphenylpolipolifenipolisocyanates
aciditane
polymethylene
polyisocyanates
improvement
Prior art date
Application number
IT49268/75A
Other languages
English (en)
Original Assignee
Upjohn Co
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 Upjohn Co filed Critical Upjohn Co
Application granted granted Critical
Publication of IT1035443B publication Critical patent/IT1035443B/it

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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Polyurethanes Or Polyureas (AREA)
IT49268/75A 1974-05-09 1975-04-23 Perfezionamento nel procediamento di produzione di poliisocianati in particolare per ridurre la aciditane il contenuto di cloruro idrolizzabile in polimetilene e polifenilpolifenipoliisocianati IT1035443B (it)

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 (1)

Publication Number Publication Date
IT1035443B true IT1035443B (it) 1979-10-20

Family

ID=23859029

Family Applications (1)

Application Number Title Priority Date Filing Date
IT49268/75A IT1035443B (it) 1974-05-09 1975-04-23 Perfezionamento nel procediamento di produzione di poliisocianati in particolare per ridurre la aciditane il contenuto di cloruro idrolizzabile in polimetilene e polifenilpolifenipoliisocianati

Country Status (11)

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

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
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
US5185384A (en) * 1991-01-28 1993-02-09 The Dow Chemical Company Method for reducing hydrolyzable chloride in toluene diisocyanate
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
US11235260B2 (en) * 2016-08-04 2022-02-01 Covestro Deutschland Ag Method for controlling a rectification column

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
JPS5218699B2 (it) 1977-05-24
DE2515628B2 (de) 1979-03-15
SU584763A3 (ru) 1977-12-15
DD118105A5 (it) 1976-02-12
BR7502764A (pt) 1976-03-16
DE2515628A1 (de) 1975-11-20
NL171578B (nl) 1982-11-16
NL171578C (nl) 1983-04-18
FR2270276A1 (it) 1975-12-05
JPS50157346A (it) 1975-12-19
ES437487A1 (es) 1977-04-16
US3912600A (en) 1975-10-14
FR2270276B1 (it) 1979-10-05
NL7505399A (nl) 1975-11-11
GB1458323A (en) 1976-12-15

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