ES2083652T3 - Procedimiento para la preparacion de poliisocianatos. - Google Patents

Procedimiento para la preparacion de poliisocianatos.

Info

Publication number
ES2083652T3
ES2083652T3 ES92118832T ES92118832T ES2083652T3 ES 2083652 T3 ES2083652 T3 ES 2083652T3 ES 92118832 T ES92118832 T ES 92118832T ES 92118832 T ES92118832 T ES 92118832T ES 2083652 T3 ES2083652 T3 ES 2083652T3
Authority
ES
Spain
Prior art keywords
boiling
deposit
column
debut
zone
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 - Lifetime
Application number
ES92118832T
Other languages
English (en)
Inventor
Andreas Dr Hauner
Hans-Joachim Dr Hennig
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
Application granted granted Critical
Publication of ES2083652T3 publication Critical patent/ES2083652T3/es
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • C07C263/04—Preparation of derivatives of isocyanic acid from or via carbamates or carbamoyl halides

Landscapes

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

Abstract

UN PROCESO PARA LA FABRICACION CONTINUA, LIBRE DE CATALIZADORES DE POLIISOCIANATOS A TRAVES DE DESDOBLAMIENTO TERMICO DEL N ESTER ACIDO CARBAMICO SUSTITUIDO CORRESPONDIENTE A LOS POLIISOCIANATOS, DONDE EL ESTER DE ACIDO CARBAMICO A SOMETER A PROCESO DE DESDOBLAMIENTO EN FORMA DE UNA SOLUCION DE 5 HASTA 90% EN PESO SE CALIENTA EN UN DISOLVENTE DE ALTA EBULLICION INERTE SOBRE UNA TEMPERATURA DESDE 100 HASTA 400 C Y A CONTINUACION BAJO RELAJACION SE CONDUCE COMO CORRIENTE LATERAL EN UNA COLUMNA 4 DE DESTILACION, EN CUYO DEPOSITO SE OBTIENE UNA PRESION DENTRO DE LA ZONA DE 0,001 HASTA 5 BAR Y UNA TEMPERATURA DENTRO DE LA ZONA DE 150 HASTA 400 C, DE FORMA QUE EL ELEMENTO DE ALTA EBULLICION SE RETIENE EN EL DEPOSITO EN EL PROCESO DE EBULLICION, CON LO QUE AL MISMO TIEMPO LOS PRODUCTOS DE DESDOBLAMIENTO SON CONDENSADOS DE FORMA CONTINUA SELECTIVA EN LA CABEZA DE LA COLUMNA DE DESTILACION Y SE CENTRIFUGA SOBRE EL DESARROLLO DE BAJADA DEL DEPOSITO DE FORMA CONTINUA DE UNA CANTIDAD TAL DEL ELEMENTO DE ALTA EBULLICION QUE CONTIENE EVENTUALMENTE IMPUREZAS, QUE CORRESPONDE EN LA PRIMERA APROXIMACION DE LA CANTIDAD DEL ELEMENTO DE ALTA EBULLICION, QUE ES ALIMENTADO COMO DISOLVENTE PARA EL ESTER ACIDO CARBAMICO EN LA COLUMNA.
ES92118832T 1991-11-14 1992-11-03 Procedimiento para la preparacion de poliisocianatos. Expired - Lifetime ES2083652T3 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE4137428A DE4137428A1 (de) 1991-11-14 1991-11-14 Verfahren zur herstellung von polyisocyanaten

Publications (1)

Publication Number Publication Date
ES2083652T3 true ES2083652T3 (es) 1996-04-16

Family

ID=6444776

Family Applications (1)

Application Number Title Priority Date Filing Date
ES92118832T Expired - Lifetime ES2083652T3 (es) 1991-11-14 1992-11-03 Procedimiento para la preparacion de poliisocianatos.

Country Status (7)

Country Link
US (1) US5284969A (es)
EP (1) EP0542106B1 (es)
JP (1) JP3274514B2 (es)
CA (1) CA2082786C (es)
DE (2) DE4137428A1 (es)
ES (1) ES2083652T3 (es)
MX (1) MX9206304A (es)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4342426A1 (de) * 1993-12-13 1995-06-14 Bayer Ag Verfahren zur Herstellung von Diurethanen und ihre Verwendung zur Herstellung von Diisocyanaten
DE59705128D1 (de) * 1996-03-15 2001-12-06 Bayer Ag Verfahren zur thermischen Spaltung von Carbamidsäureestern
DE19813107A1 (de) 1998-03-25 1999-09-30 Basf Ag Verfahren zur Herstellung von Polyurethanschaumstoffen
DE19907648A1 (de) * 1999-02-23 2000-08-24 Basf Ag Verfahren zur Herstellung von Isocyanaten durch Spaltung von Urethanen
DE60113814T2 (de) 2000-02-29 2006-06-29 Huntsman International Llc, Salt Lake City Verfahren zur herstellung organischer polyisocyanate
DE10111645A1 (de) * 2001-03-10 2002-09-19 Basf Ag Verfahren zur Herstellung von organischen Polyisocyanaten
EP2011782A1 (en) * 2007-07-02 2009-01-07 Huntsman International Llc Process for the synthesis of carbamates using co2
CN101531619B (zh) * 2009-04-21 2013-04-03 山东润兴化工科技有限公司 一种氨基烷酸酯热解制备异氰酸酯的装置
CN101870665B (zh) * 2010-05-18 2014-04-30 中国科学院过程工程研究所 用于氨基甲酸酯热解反应的气液固三相逆流反应装置及其方法
ES2714602T3 (es) 2010-10-04 2019-05-29 Asahi Chemical Ind Método de separación y método para producir isocianato
CN105143177B (zh) 2013-04-03 2018-07-10 三井化学株式会社 苯二甲撑二异氰酸酯的制造方法及苯二甲撑二异氰酸酯的制造装置
JP2019199427A (ja) * 2018-05-15 2019-11-21 旭化成株式会社 イソシアネートの製造方法
EP4431490A4 (en) 2021-11-08 2025-03-05 Asahi Kasei Kabushiki Kaisha PROCESS FOR PRODUCING ISOCYANATE COMPOUNDS, PROCESS FOR PRODUCING CARBAMATE COMPOUNDS, PROCESS FOR RECOVERING AMINE COMPOUNDS AND ISOCYANATE COMPOSITION

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2409712A (en) * 1944-02-03 1946-10-22 Du Pont Chemical process and products
US3870739A (en) * 1973-03-05 1975-03-11 Air Prod & Chem Isocyanates from urethanes
US3962302A (en) * 1974-03-08 1976-06-08 Atlantic Richfield Company Production of isocyanates from esters of carbamic acids (urethanes)
US3919278A (en) * 1974-06-13 1975-11-11 Atlantic Richfield Co Production of isocyanates from lower alkyl esters of mononuclear aromatic carbamic acids
US3919279A (en) * 1974-06-26 1975-11-11 Atlantic Richfield Co Catalytic production of isocyanates from esters of carbamic acids
US3919280A (en) * 1974-07-05 1975-11-11 Atlantic Richfield Co Recovery of solvents employed in the production of isocyanates from esters of carbamic acids
DE2512514C2 (de) * 1975-03-21 1982-12-30 Basf Ag, 6700 Ludwigshafen Verfahren zur Herstellung von aliphatischen Isocyanaten
JPS5219624A (en) * 1975-08-07 1977-02-15 Mitsui Toatsu Chem Inc Process for preparation of isocyanates
US3992430A (en) * 1975-09-11 1976-11-16 Chevron Research Company Process for preparing aromatic isocyanates
DE2756928A1 (de) * 1977-12-21 1979-07-05 Bayer Ag Verfahren zur kontinuierlichen herstellung von monoisocyanaten
DE2806214A1 (de) * 1978-02-14 1979-08-16 Bayer Ag Verfahren zur kontinuierlichen aufarbeitung von bei der phosgenierung von monoaminen anfallenden loesungen
DE2942543A1 (de) * 1979-10-20 1981-05-07 Basf Ag, 6700 Ludwigshafen Verfahren zur herstellung von arylisocyanaten durch thermische spaltung von arylurethanen
DE3339300A1 (de) * 1983-10-29 1985-05-09 Basf Ag, 6700 Ludwigshafen Verfahren zur herstellung von isocyanaten durch thermische spaltung von urethanen
WO1988005430A1 (fr) * 1987-01-13 1988-07-28 Daicel Chemical Industries, Ltd. Procede de preparation de composes d'isocyanate

Also Published As

Publication number Publication date
EP0542106A3 (en) 1993-07-21
US5284969A (en) 1994-02-08
DE4137428A1 (de) 1993-05-19
EP0542106A2 (de) 1993-05-19
JP3274514B2 (ja) 2002-04-15
MX9206304A (es) 1993-05-01
CA2082786A1 (en) 1993-05-15
JPH05255227A (ja) 1993-10-05
CA2082786C (en) 2003-10-14
EP0542106B1 (de) 1995-12-27
DE59204836D1 (de) 1996-02-08

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