GB1423993A - Process for the crystallisation of diphenylmethane diisocyanate from a crude undistilled polyisocyanate mixture - Google Patents

Process for the crystallisation of diphenylmethane diisocyanate from a crude undistilled polyisocyanate mixture

Info

Publication number
GB1423993A
GB1423993A GB2084772A GB2084772A GB1423993A GB 1423993 A GB1423993 A GB 1423993A GB 2084772 A GB2084772 A GB 2084772A GB 2084772 A GB2084772 A GB 2084772A GB 1423993 A GB1423993 A GB 1423993A
Authority
GB
United Kingdom
Prior art keywords
crystallisation
diphenylmethane diisocyanate
polyisocyanate mixture
crude undistilled
undistilled
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
GB2084772A
Other languages
English (en)
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.)
Imperial Chemical Industries Ltd
Original Assignee
Imperial Chemical Industries Ltd
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 Imperial Chemical Industries Ltd filed Critical Imperial Chemical Industries Ltd
Priority to GB2084772A priority Critical patent/GB1423993A/en
Priority to BE130601A priority patent/BE798934A/xx
Priority to FR7315953A priority patent/FR2183237B3/fr
Priority to ES414392A priority patent/ES414392A1/es
Priority to BR323573A priority patent/BR7303235D0/pt
Priority to JP48050213A priority patent/JPS4947355A/ja
Priority to AR24784773A priority patent/AR195612A1/es
Priority to DE19732322574 priority patent/DE2322574A1/de
Priority to NL7306235A priority patent/NL7306235A/xx
Publication of GB1423993A publication Critical patent/GB1423993A/en
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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Polyurethanes Or Polyureas (AREA)
GB2084772A 1972-05-04 1972-05-04 Process for the crystallisation of diphenylmethane diisocyanate from a crude undistilled polyisocyanate mixture Expired GB1423993A (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
GB2084772A GB1423993A (en) 1972-05-04 1972-05-04 Process for the crystallisation of diphenylmethane diisocyanate from a crude undistilled polyisocyanate mixture
BE130601A BE798934A (fr) 1972-05-04 1973-04-30 Procede de cristallisation
FR7315953A FR2183237B3 (https=) 1972-05-04 1973-05-03
ES414392A ES414392A1 (es) 1972-05-04 1973-05-04 Procedimiento para la separacion de difenilmetandiisociato a partir de una mezcla en bruto y no destilada de poliiso- cianatos.
BR323573A BR7303235D0 (pt) 1972-05-04 1973-05-04 Processo de cristalizacao de di-isocianatos em uma mistura de poli-isocianatos e as misturas de poli-isocianatos obtidas pelo dito processo
JP48050213A JPS4947355A (https=) 1972-05-04 1973-05-04
AR24784773A AR195612A1 (es) 1972-05-04 1973-05-04 Un procedimiento para la sparacion de difenilmetan diisocianato con respecto a una mezcla de poliisocianato no destilado crudo
DE19732322574 DE2322574A1 (de) 1972-05-04 1973-05-04 Verfahren zur abtrennung von diphenylmethandiisocyanat aus einem rohen undestillierten polyisocyanatgemisch
NL7306235A NL7306235A (https=) 1972-05-04 1973-05-04

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2084772A GB1423993A (en) 1972-05-04 1972-05-04 Process for the crystallisation of diphenylmethane diisocyanate from a crude undistilled polyisocyanate mixture

Publications (1)

Publication Number Publication Date
GB1423993A true GB1423993A (en) 1976-02-04

Family

ID=10152731

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2084772A Expired GB1423993A (en) 1972-05-04 1972-05-04 Process for the crystallisation of diphenylmethane diisocyanate from a crude undistilled polyisocyanate mixture

Country Status (9)

Country Link
JP (1) JPS4947355A (https=)
AR (1) AR195612A1 (https=)
BE (1) BE798934A (https=)
BR (1) BR7303235D0 (https=)
DE (1) DE2322574A1 (https=)
ES (1) ES414392A1 (https=)
FR (1) FR2183237B3 (https=)
GB (1) GB1423993A (https=)
NL (1) NL7306235A (https=)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7649108B2 (en) 2003-05-08 2010-01-19 Bayer Materialscience Ag Process for the distillation of a mixture of isomeric diisocyanatodiphenylmethanes
WO2010040675A3 (en) * 2008-10-06 2010-06-24 Huntsman International Llc Process for the simultaneous production of different mixtures of diisocyanate isomers of the diphenylmethane series
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
CN112979500A (zh) * 2021-05-10 2021-06-18 中国科学院过程工程研究所 一种提纯苯二亚甲基二异氰酸酯的装置与方法

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5348285A (en) * 1976-10-14 1978-05-01 Citizen Watch Co Ltd Feed mechanism in system for controlling turning angle of spindle for lathe
JPS56146648A (en) * 1980-04-08 1981-11-14 Mitsubishi Heavy Ind Ltd Method of detecting speed of main shaft drive system of numerical-controlled machine tool
JPS57162047U (https=) * 1981-03-31 1982-10-12
US4360476A (en) 1981-12-24 1982-11-23 The Dow Chemical Company Method of concentrating a solution of methylene diphenyl diisocyanate in diphenyl oxide
JPS6090601A (ja) * 1983-10-20 1985-05-21 Seibu Denki Kogyo Kk 円形断面形状を有する被加工物の旋削加工方法及び装置

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7649108B2 (en) 2003-05-08 2010-01-19 Bayer Materialscience Ag Process for the distillation of a mixture of isomeric diisocyanatodiphenylmethanes
WO2010040675A3 (en) * 2008-10-06 2010-06-24 Huntsman International Llc Process for the simultaneous production of different mixtures of diisocyanate isomers of the diphenylmethane series
CN102171180A (zh) * 2008-10-06 2011-08-31 亨茨曼国际有限公司 同时生产二苯甲烷系列的二异氰酸酯异构体的不同混合物的方法
EP2423183A1 (en) * 2008-10-06 2012-02-29 Huntsman International LLC Process for the simultaneous production of different mixtures of diisocyanate isomers of the diphenylmethane series
EP2423184A1 (en) * 2008-10-06 2012-02-29 Huntsman International LLC Process for the simultaneous production of different mixtures of diisocyanate isomers of the diphenylmethane series
AU2009301226B2 (en) * 2008-10-06 2013-08-22 Huntsman International Llc Process for the simultaneous production of different mixtures of diisocyanate isomers of the diphenylmethane series
RU2496771C2 (ru) * 2008-10-06 2013-10-27 Хантсмэн Интернэшнл Ллс Способ одновременного получения различных смесей изомеров диизоцианатов ряда дифенилметана
US8779182B2 (en) 2008-10-06 2014-07-15 Huntsman International Llc Process for the simultaneous production of different mixtures of diisocyanate isomers of the diphenylmethane series
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
CN112979500A (zh) * 2021-05-10 2021-06-18 中国科学院过程工程研究所 一种提纯苯二亚甲基二异氰酸酯的装置与方法

Also Published As

Publication number Publication date
JPS4947355A (https=) 1974-05-08
BR7303235D0 (pt) 1974-07-18
FR2183237B3 (https=) 1976-04-23
BE798934A (fr) 1973-10-30
FR2183237A1 (https=) 1973-12-14
ES414392A1 (es) 1976-02-01
AR195612A1 (es) 1973-10-23
NL7306235A (https=) 1973-11-06
DE2322574A1 (de) 1973-11-22

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee