ES414392A1 - Procedimiento para la separacion de difenilmetandiisociato a partir de una mezcla en bruto y no destilada de poliiso- cianatos. - Google Patents

Procedimiento para la separacion de difenilmetandiisociato a partir de una mezcla en bruto y no destilada de poliiso- cianatos.

Info

Publication number
ES414392A1
ES414392A1 ES414392A ES414392A ES414392A1 ES 414392 A1 ES414392 A1 ES 414392A1 ES 414392 A ES414392 A ES 414392A ES 414392 A ES414392 A ES 414392A ES 414392 A1 ES414392 A1 ES 414392A1
Authority
ES
Spain
Prior art keywords
crystallisation
diphenylmethane diisocyanate
polyisocyanate mixture
crude
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
ES414392A
Other languages
English (en)
Spanish (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.)
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
Publication of ES414392A1 publication Critical patent/ES414392A1/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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Polyurethanes Or Polyureas (AREA)
ES414392A 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. Expired ES414392A1 (es)

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
ES414392A1 true ES414392A1 (es) 1976-02-01

Family

ID=10152731

Family Applications (1)

Application Number Title Priority Date Filing Date
ES414392A Expired 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.

Country Status (9)

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

Families Citing this family (9)

* 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 (fr) * 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
EP1475367B1 (fr) 2003-05-08 2010-07-07 Bayer MaterialScience AG Procédé de séparation par distillation de mélanges d'isomères de diisocyanato diphénylméthane
RU2496771C2 (ru) * 2008-10-06 2013-10-27 Хантсмэн Интернэшнл Ллс Способ одновременного получения различных смесей изомеров диизоцианатов ряда дифенилметана
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
CN112979500B (zh) * 2021-05-10 2024-06-18 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 (fr) 1974-05-08
BR7303235D0 (pt) 1974-07-18
DE2322574A1 (de) 1973-11-22
AR195612A1 (es) 1973-10-23
FR2183237B3 (fr) 1976-04-23
NL7306235A (fr) 1973-11-06
FR2183237A1 (fr) 1973-12-14
BE798934A (fr) 1973-10-30
GB1423993A (en) 1976-02-04

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