ES8505388A1 - Procedimiento para la purificacion de poliisocianatos en bruto - Google Patents

Procedimiento para la purificacion de poliisocianatos en bruto

Info

Publication number
ES8505388A1
ES8505388A1 ES535092A ES535092A ES8505388A1 ES 8505388 A1 ES8505388 A1 ES 8505388A1 ES 535092 A ES535092 A ES 535092A ES 535092 A ES535092 A ES 535092A ES 8505388 A1 ES8505388 A1 ES 8505388A1
Authority
ES
Spain
Prior art keywords
purified
polyisocyanates
temperature
polyisocyanate
solvent
Prior art date
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
ES535092A
Other languages
English (en)
Other versions
ES535092A0 (es
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bayer AG
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 ES535092A0 publication Critical patent/ES535092A0/es
Publication of ES8505388A1 publication Critical patent/ES8505388A1/es
Expired legal-status Critical Current

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
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Polyurethanes Or Polyureas (AREA)

Abstract

PROCEDIMIENTO PARA LA PURIFICACION DE POLIISOCIANATOS EN BRUTO.COMPRENDE, A) EXTRAER EL POLIISISOCIANATO A PURIFICAR CON UN AGENTE DE EXTRACCION CONSISTENTE EN UN DISOLVENTE CON POLIISOCIANATO PURIFICADO DEL POLIISOCIANATO A PURIFICAR, A UNA TEMPERATURA ENTRE 80 Y 180JC Y CON UNA PROPORCION EN VOLUMEN DE POLIISOCIANATO/AGENTE DE EXTRACCION DE 5:1, PARA FORMAR UN SISTEMA BIFASICO COMPUESTO POR UNA FASE PRINCIPAL Y UNA FASE SECUNDARIA CON UNA RELACION EN VOLUMEN DE 20:1, B) SEPARAR A LA FASE PRINCIPAL COMPUESTA DE LA CANTIDAD PRINCIPAL DEL DISOLVENTE Y DE POLIISOCIANATO PURIFICADO, DE LA FASE SECUNDARIA COMPUESTA POR LOS COMPONENTES DE MAYOR PESO E IMPUREZAS A PURIFICAR Y REDUCIDAS CANTIDADES DE DISOLVENTE, C) ENFRIAR A LA FASE PRINCIPAL A UNA TEMPERATURA 50JC INFERIOR A LA TEMPERATURA DE EXTRACCION, PARA OBTENER UNA FASE INFERIOR COMPUESTA DE POLIISOCIANATO PURIFICADO Y CANTIDADES RESIDUALES DE DISOLVENTE Y UNA FASE SUPERIOR COMPUESTA DE DISOLVENTE SATURADO CON POLIISOCIANATO PURIFICADO Y D)SEPARAR A LA FASE INFERIOR DE LA FASE SUPERIOR.
ES535092A 1983-08-11 1984-08-10 Procedimiento para la purificacion de poliisocianatos en bruto Expired ES8505388A1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19833329124 DE3329124A1 (de) 1983-08-11 1983-08-11 Verfahren zur reinigung von polyisocyanaten und die so gereinigten polyisocyanate

Publications (2)

Publication Number Publication Date
ES535092A0 ES535092A0 (es) 1985-05-16
ES8505388A1 true ES8505388A1 (es) 1985-05-16

Family

ID=6206376

Family Applications (1)

Application Number Title Priority Date Filing Date
ES535092A Expired ES8505388A1 (es) 1983-08-11 1984-08-10 Procedimiento para la purificacion de poliisocianatos en bruto

Country Status (7)

Country Link
US (1) US4774357A (es)
EP (1) EP0133538B1 (es)
JP (1) JPS6058955A (es)
BR (1) BR8404026A (es)
CA (1) CA1243332A (es)
DE (2) DE3329124A1 (es)
ES (1) ES8505388A1 (es)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
DE4111212A1 (de) * 1991-04-06 1992-10-08 Bayer Ag Verfahren zur konditionierung und/oder reinigung von organischen isocyanaten
DE4208359A1 (de) * 1992-03-16 1993-09-23 Bayer Ag Verfahren zur herstellung von isocyanaten oder isocyanatgemischen und deren verwendung zur herstellung von polyurethanschaumstoffen
US5364958A (en) * 1992-06-23 1994-11-15 Mitsui Toatsu Chemicals, Incorporated Process for the production of methylene-crosslinked polyphenylene polyisocyanate
ES2123171T3 (es) * 1994-04-07 1999-01-01 Bayer Ag Procedimiento para la fabricacion de isocianatos o mezclas de isocianatos.
DE19711447A1 (de) * 1997-03-19 1998-09-24 Basf Ag Verfahren zur Herstellung von Isocyanaten mit heller Farbe
US5962728A (en) * 1997-10-31 1999-10-05 Arco Chemical Technology, L.P. Isocyanate residue purification
DE19928741A1 (de) 1999-06-23 2000-12-28 Basf Ag Helle Isocyanate, Verfahren zu deren Herstellung und deren Verwendung
DE102005026864A1 (de) * 2005-06-10 2006-12-14 Bayer Materialscience Ag Verfahren zur Herstellung von 4,4'-Diphenylmethandiisocyanat
EP1976898B1 (de) * 2006-01-13 2019-03-13 Basf Se Isocyanathaltige zubereitungen
DE102006002157A1 (de) * 2006-01-17 2007-07-19 Bayer Materialscience Ag Verfahren zur Herstellung heller Isocyanate
KR101502441B1 (ko) * 2006-04-12 2015-03-17 바스프 에스이 폴리우레탄의 제조 방법
ES2400332T3 (es) 2008-11-19 2013-04-09 Basf Se Método para la producción de un isocianato
ES2608486T5 (es) 2008-11-26 2020-05-19 Huntsman Int Llc Procedimiento para fabricar isocianatos
KR20120050444A (ko) 2009-07-16 2012-05-18 바스프 에스이 디페닐메탄 디이소시아네이트 계열의 명색 이소시아네이트의 제조 방법
US8907124B2 (en) 2010-11-17 2014-12-09 Basf Se Process for preparing methylenedi(phenyl isocyanate)
WO2012065927A1 (de) 2010-11-17 2012-05-24 Basf Se Verfahren zur herstellung von methylendiphenyldiisocyanat
HUE027504T2 (en) 2011-10-21 2016-10-28 Covestro Deutschland Ag Process for the preparation of light-colored polyisocyanates
KR102334680B1 (ko) 2019-10-31 2021-12-07 주식회사 잉크테크 유기 형광 안료 분산액 및 유기 형광 안료 분산액의 제조방법

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3144474A (en) * 1964-08-11 Purification process for isocyanates
GB887874A (en) * 1959-06-12 1962-01-24 Ici Ltd Purification process for isocyanates
NL291785A (es) * 1962-09-12
US3479384A (en) * 1964-12-28 1969-11-18 Mobay Chemical Corp Crude polyisocyanate compositions and preparation thereof
US3816496A (en) * 1972-01-03 1974-06-11 Olin Corp Solvent extraction and distillation technique for purification of organic isocyanates
US3987075A (en) * 1972-01-03 1976-10-19 Olin Corporation Solvent extraction and distillation technique for purification of organic isocyanates
GB1517162A (en) * 1974-07-24 1978-07-12 Shell Int Research Purification of diisocyanate
DD127328A1 (es) * 1976-07-27 1977-09-21

Also Published As

Publication number Publication date
JPS6058955A (ja) 1985-04-05
EP0133538A2 (de) 1985-02-27
DE3329124A1 (de) 1985-02-28
CA1243332A (en) 1988-10-18
ES535092A0 (es) 1985-05-16
EP0133538B1 (de) 1990-03-14
BR8404026A (pt) 1985-07-16
DE3481609D1 (de) 1990-04-19
US4774357A (en) 1988-09-27
EP0133538A3 (en) 1987-12-16

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Legal Events

Date Code Title Description
FD1A Patent lapsed

Effective date: 19970612