[go: up one dir, main page]

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 ES8505388A1 publication Critical patent/ES8505388A1/es
Publication of ES535092A0 publication Critical patent/ES535092A0/es
Granted 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 Granted ES535092A0 (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
ES8505388A1 true ES8505388A1 (es) 1985-05-16
ES535092A0 ES535092A0 (es) 1985-05-16

Family

ID=6206376

Family Applications (1)

Application Number Title Priority Date Filing Date
ES535092A Granted ES535092A0 (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) ES535092A0 (es)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
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
EP0676391B1 (de) * 1994-04-07 1998-10-14 Bayer Ag Verfahren zur Herstellung von Isocyanaten oder Isocyanatgemischen
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
WO2007082789A1 (de) * 2006-01-13 2007-07-26 Basf Se Isocyanathaltige zubereitungen
DE102006002157A1 (de) * 2006-01-17 2007-07-19 Bayer Materialscience Ag Verfahren zur Herstellung heller Isocyanate
DE502007004865D1 (de) * 2006-04-12 2010-10-07 Basf Se Verfahren zur herstellung von polyurethanen
US8853443B2 (en) 2008-11-19 2014-10-07 Basf Se Process for preparing an isocyanate
WO2010060773A1 (en) 2008-11-26 2010-06-03 Huntsman International Llc Process for manufacturing isocyanates
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)
KR101898745B1 (ko) 2010-11-17 2018-09-13 바스프 에스이 메틸렌디(페닐 이소시아네이트)의 제조 방법
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
JP2022170318A (ja) * 2021-04-28 2022-11-10 旭化成株式会社 イソシアネートの製造方法

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

Similar Documents

Publication Publication Date Title
ES8505388A1 (es) Procedimiento para la purificacion de poliisocianatos en bruto
US3404103A (en) Method of decomposing urethane polymer
EP0124309A3 (en) Extraction process
US4159972A (en) Dissolution of polyurethane foams and re-use of the products therefrom
IE53080B1 (en) Spent oil recovery process
US4406778A (en) Spent oil recovery process
EP0013350B1 (de) Verfahren zur Auftrennung von Polyurethanhydrolysaten in Polyol und Polyamin
US3694323A (en) Separation of distillable isocyanates from their phosgenation masses
US3410888A (en) Process for recovering aromatic diisocyanates
US3140305A (en) Preparation of diisocyanates
EP0986535A1 (en) Method for the preparation of organic isocyanates
US3211631A (en) Noilvttitsig gnv noijovhlxh
US4399236A (en) Process for separating polyurethane hydrolyzates into polyether and diamine
EP0268906A3 (en) Compatibilized blends of alpha, omega-alkylene glycols and polyether polyols and process for preparing the same
US4871828A (en) Purification/isolation of isocyanate condensates
IL42774A (en) Purification of phosphoric acid
US3729386A (en) Organic isocyanate recovery process by distillation with a tar-thinning agent and a stripping agent
EP0000871B1 (en) Method of preparing 2,2'-dithiodianiline
JP2002533424A (ja) ビスフェノールａの調製方法
US2680131A (en) Trans vinylene diisocyanate and method of preparation
US3994892A (en) Process for purifying cyanuric acid
EP0116847A2 (en) Process for using sediments developed during storage of pure MDI
US3282966A (en) Recovery of purified propylene oxide by plural stage distillation
US3123607A (en) Recovery of diazabicyclo-octane
GB1522072A (en) Process for the production of soluble high molecular weight polyurethanes which are free from isocyanate groups

Legal Events

Date Code Title Description
FD1A Patent lapsed

Effective date: 19970612