BR8206567A - Processo para preparacao de 4,4'-diisocianatodifenilmetano - Google Patents

Processo para preparacao de 4,4'-diisocianatodifenilmetano

Info

Publication number
BR8206567A
BR8206567A BR8206567A BR8206567A BR8206567A BR 8206567 A BR8206567 A BR 8206567A BR 8206567 A BR8206567 A BR 8206567A BR 8206567 A BR8206567 A BR 8206567A BR 8206567 A BR8206567 A BR 8206567A
Authority
BR
Brazil
Prior art keywords
diisocianatodiphenylmetan
preparation
Prior art date
Application number
BR8206567A
Other languages
English (en)
Inventor
Ellendt Gunther
Gleitsmann Gunter
Scheidel Max
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 BR8206567A publication Critical patent/BR8206567A/pt

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
BR8206567A 1981-11-12 1982-11-11 Processo para preparacao de 4,4'-diisocianatodifenilmetano BR8206567A (pt)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19813145010 DE3145010A1 (de) 1981-11-12 1981-11-12 Verfahren zur herstellung von 4,4'-diisocyanatodiphenylmethan

Publications (1)

Publication Number Publication Date
BR8206567A true BR8206567A (pt) 1983-09-27

Family

ID=6146267

Family Applications (1)

Application Number Title Priority Date Filing Date
BR8206567A BR8206567A (pt) 1981-11-12 1982-11-11 Processo para preparacao de 4,4'-diisocianatodifenilmetano

Country Status (6)

Country Link
US (1) US4414074A (pt)
EP (1) EP0079516B1 (pt)
JP (1) JPS5890540A (pt)
BR (1) BR8206567A (pt)
DE (2) DE3145010A1 (pt)
ES (1) ES517281A0 (pt)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2875877B2 (ja) * 1990-10-23 1999-03-31 三井化学株式会社 メチレン架橋ポリフェニレンポリイソシアネートの製造方法
DE4200236A1 (de) * 1992-01-08 1993-07-15 Bayer Ag Verfahren zur isolierung von polyisocyanat-isomeren aus polyisocyanatgemischen
EP1475367B1 (de) * 2003-05-08 2010-07-07 Bayer MaterialScience AG Verfahren zur Destillation eines Gemisches isomerer Diisocyanatodiphenylmethane
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
DE102004005319A1 (de) * 2004-02-04 2005-08-25 Bayer Materialscience Ag Verfahren zur Herstellung von hochreinem 2,4'-Methylendiphenyldiisocyanat
DE102004005320A1 (de) * 2004-02-04 2005-08-25 Bayer Materialscience Ag Herstellung von Di- und Polysocyanaten der Diphenylmethanreihe mit definierter Acidität
DE102005026864A1 (de) * 2005-06-10 2006-12-14 Bayer Materialscience Ag Verfahren zur Herstellung von 4,4'-Diphenylmethandiisocyanat
JP6046043B2 (ja) 2010-11-17 2016-12-14 ビーエーエスエフ ソシエタス・ヨーロピアＢａｓｆ Ｓｅ ４，４’−メチレンジフェニルジイソシアネートを含む混合物を精錬するための方法
KR101898745B1 (ko) 2010-11-17 2018-09-13 바스프 에스이 메틸렌디(페닐 이소시아네이트)의 제조 방법
US9505711B2 (en) 2010-11-17 2016-11-29 Basf Se 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)
WO2012066001A1 (de) 2010-11-17 2012-05-24 Basf Se Verfahren zur aufreinigung von 4,4'-methylendiphenyldiisocyanat enthaltenden mischungen
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
HUE057045T2 (hu) 2018-01-05 2022-04-28 Covestro Intellectual Property Gmbh & Co Kg Eljárás metilén-difenilén-diizocianátok és polimetilén-polifenilén-poliizocianátok elõállítására
CN112142623A (zh) * 2019-06-27 2020-12-29 万华化学（宁波）有限公司 一种低活性的mdi-50产品的制备方法及应用

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3155699A (en) * 1960-03-30 1964-11-03 Mobay Chemical Corp Purification of isocyanates by reduction of the hydrolyzable chlorine and acid content
BE755243Q (fr) * 1965-07-08 1971-02-01 Upjohn Co Procedes de fabrication d'isocyanates et de polyisocyanates
GB1229181A (pt) 1968-08-01 1971-04-21
US3658656A (en) * 1968-11-07 1972-04-25 Takeda Chemical Industries Ltd Purification of xylylene organic diisocyanate by fractional distillation in the presence of an inert gas or superheated vapor of an organic solvent
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
US3816496A (en) * 1972-01-03 1974-06-11 Olin Corp Solvent extraction and distillation technique for purification of organic isocyanates
US3892634A (en) * 1973-02-20 1975-07-01 Upjohn Co Separation of 2,4{40 {0 and 4,4{40 {0 methylene bis(phenyl isocyanate) from polymethylene polyphenyl polyisocyanates
US3912600A (en) * 1974-05-09 1975-10-14 Upjohn Co Recovery of polymethylene polyphenyl polyisocyanate from a phoshenosed polyamine feed
US4118286A (en) * 1974-09-25 1978-10-03 Texaco Development Corp. Process for reducing the acidity of organic polymeric isocyanates
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
JPS5927896B2 (ja) * 1978-11-06 1984-07-09 富士写真フイルム株式会社 ハロゲン化銀カラ−感光材料

Also Published As

Publication number Publication date
EP0079516B1 (de) 1986-01-22
EP0079516A2 (de) 1983-05-25
ES8307721A1 (es) 1983-08-01
DE3145010A1 (de) 1983-05-19
JPH0219824B2 (pt) 1990-05-07
ES517281A0 (es) 1983-08-01
JPS5890540A (ja) 1983-05-30
DE3268708D1 (en) 1986-03-06
US4414074A (en) 1983-11-08
EP0079516A3 (en) 1984-10-10

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Legal Events

Date Code Title Description
B21A Expiry acc. art. 78, item i of ipl- expiry of the term of protection

Free format text: PATENTE EXTINTA EM 11/11/97