DD110859A5 - - Google Patents

Info

Publication number
DD110859A5
DD110859A5 DD176626A DD17662674A DD110859A5 DD 110859 A5 DD110859 A5 DD 110859A5 DD 176626 A DD176626 A DD 176626A DD 17662674 A DD17662674 A DD 17662674A DD 110859 A5 DD110859 A5 DD 110859A5
Authority
DD
German Democratic Republic
Application number
DD176626A
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 DD110859A5 publication Critical patent/DD110859A5/xx

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
    • 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)
DD176626A 1973-02-20 1974-02-18 DD110859A5 (xx)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US334048A US3892634A (en) 1973-02-20 1973-02-20 Separation of 2,4{40 {0 and 4,4{40 {0 methylene bis(phenyl isocyanate) from polymethylene polyphenyl polyisocyanates

Publications (1)

Publication Number Publication Date
DD110859A5 true DD110859A5 (xx) 1975-01-12

Family

ID=23305353

Family Applications (1)

Application Number Title Priority Date Filing Date
DD176626A DD110859A5 (xx) 1973-02-20 1974-02-18

Country Status (6)

Country Link
US (1) US3892634A (xx)
JP (1) JPS524548B2 (xx)
DD (1) DD110859A5 (xx)
DE (1) DE2404170C3 (xx)
NL (1) NL162367C (xx)
SU (1) SU564806A3 (xx)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1039744B (it) * 1975-07-08 1979-12-10 Sir Soc Italiana Resine Spa Procedimento per la preparazione di diepossidi
DE3145010A1 (de) * 1981-11-12 1983-05-19 Bayer Ag, 5090 Leverkusen Verfahren zur herstellung von 4,4'-diisocyanatodiphenylmethan
US4792624A (en) * 1987-02-26 1988-12-20 The Dow Chemical Company Process for polymeric MDA, recycle of finished polymeric MDA
US4876380A (en) * 1988-08-31 1989-10-24 The Dow Chemical Company Color reduction of polymeric isocyanates via multiple solvent fractionation
US5209827A (en) * 1990-10-29 1993-05-11 Eastman Kodak Company Process for the purification of hydroxypivalyl hydroxypivalate
DE4142769A1 (de) * 1991-12-23 1993-06-24 Bayer Hispania Ind S A Verfahren zur herstellung von isocyanaten und aufarbeitung des rueckstandes
DE10245584A1 (de) * 2002-09-27 2004-04-08 Basf Ag Aufarbeitung von Reaktionsausträgen aus Phosgenierreaktoren
EP1518874B1 (de) * 2003-09-24 2006-12-13 Basf Aktiengesellschaft Monomerarmes Gemisch, enthaltend polymeres MDI
DE102005026864A1 (de) * 2005-06-10 2006-12-14 Bayer Materialscience Ag Verfahren zur Herstellung von 4,4'-Diphenylmethandiisocyanat
EP3571185A1 (de) * 2017-01-18 2019-11-27 Covestro Deutschland AG Verfahren zur rückgewinnung von diisocyanaten aus destillationsrückständen

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3211631A (en) * 1965-10-12 Noilvttitsig gnv noijovhlxh
US3183112A (en) * 1955-12-06 1965-05-11 Bayer Ag Isocyanates and method of preparing same
US3140305A (en) * 1962-12-17 1964-07-07 Fmc Corp Preparation of diisocyanates
US3457291A (en) * 1965-04-01 1969-07-22 Union Carbide Corp Production of isocyanates
US3410888A (en) * 1965-05-18 1968-11-12 Upjohn Co Process for recovering aromatic diisocyanates
BE755243Q (fr) * 1965-07-08 1971-02-01 Upjohn Co Procedes de fabrication d'isocyanates et de polyisocyanates
FR1469105A (fr) * 1965-12-27 1967-02-10 Toulousaine De Prod Chim Toloc Procédé de fabrication d'esters isocyaniques
GB1109413A (en) * 1967-03-13 1968-04-10 Paul Alfred Johnson Improvements in wall plaques, statuettes, advertising devices and the like
US3565768A (en) * 1968-04-19 1971-02-23 Du Pont Process for refining 4,4'-methylenebis (cyclohexyl isocyanate)
US3554872A (en) * 1968-07-24 1971-01-12 American Cyanamid Co Process for separation of 2,6-tolylene diisocyanate from isomeric mixtures
DE1923214B2 (de) * 1969-05-07 1973-08-02 Verfahren zur gleichzeitigen herstellung von reinem 4,4'-diphenylmethandiisocyanat und einem polyphenyl-polymethylen-polyisocyanatgemisch, polyphenylpolymethylen-polyisocyanate und deren verwendung zur herstellung von polyurethanlacken

Also Published As

Publication number Publication date
NL162367C (nl) 1980-05-16
DE2404170C3 (de) 1979-11-22
DE2404170B2 (de) 1979-04-05
JPS524548B2 (xx) 1977-02-04
JPS49134660A (xx) 1974-12-25
SU564806A3 (ru) 1977-07-05
US3892634A (en) 1975-07-01
DE2404170A1 (de) 1974-09-19
NL7401500A (xx) 1974-08-22
NL162367B (nl) 1979-12-17

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