GB1083910A - Distillation of organic polyisocyanates - Google Patents

Distillation of organic polyisocyanates

Info

Publication number
GB1083910A
GB1083910A GB4120165A GB4120165A GB1083910A GB 1083910 A GB1083910 A GB 1083910A GB 4120165 A GB4120165 A GB 4120165A GB 4120165 A GB4120165 A GB 4120165A GB 1083910 A GB1083910 A GB 1083910A
Authority
GB
United Kingdom
Prior art keywords
distillation
thin film
organic polyisocyanates
polyisocyanates
polyoxypropylated
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
GB4120165A
Inventor
Andrew John Nicholas
Harry James Twitchett
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
Priority to FR1495259D priority Critical patent/FR1495259A/fr
Application filed by Imperial Chemical Industries Ltd filed Critical Imperial Chemical Industries Ltd
Priority to GB4120165A priority patent/GB1083910A/en
Priority to NL6613340A priority patent/NL6613340A/xx
Publication of GB1083910A publication Critical patent/GB1083910A/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)

Abstract

Polyisocyanates are isolated from crude mixtures by mixing the latter with a polyalkylene polyether and distilling the polyisocyanate from an agitated thin film of the resultant mixture. In examples, tolylene diisocyanate is thus obtained from a tolylenediamine phosgenation product in o-dichlorobenzene, by addition of polyoxypropylated-isooctanol or -butanol; and distillation from a wiped-wall thin film evaporator.
GB4120165A 1965-09-28 1965-09-28 Distillation of organic polyisocyanates Expired GB1083910A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
FR1495259D FR1495259A (en) 1965-09-28
GB4120165A GB1083910A (en) 1965-09-28 1965-09-28 Distillation of organic polyisocyanates
NL6613340A NL6613340A (en) 1965-09-28 1966-09-21

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4120165A GB1083910A (en) 1965-09-28 1965-09-28 Distillation of organic polyisocyanates

Publications (1)

Publication Number Publication Date
GB1083910A true GB1083910A (en) 1967-09-20

Family

ID=10418585

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4120165A Expired GB1083910A (en) 1965-09-28 1965-09-28 Distillation of organic polyisocyanates

Country Status (3)

Country Link
FR (1) FR1495259A (en)
GB (1) GB1083910A (en)
NL (1) NL6613340A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002012209A1 (en) * 2000-08-10 2002-02-14 Bayer Cropscience Ag Method for purifying 2-chloro-5-chloromethyl thiazole
WO2004031132A1 (en) * 2002-09-27 2004-04-15 Basf Aktiengesellschaft Reprocessing of reaction material discharged from phosgenation reactors
US7531067B2 (en) * 2004-03-22 2009-05-12 Toyo Kasei Kogyo Company, Limited Process for purification of 2-chloro-5-chloromethyl-1,3-thiazole
WO2018134238A1 (en) * 2017-01-18 2018-07-26 Covestro Deutschland Ag Method for extracting diisocyanates from distillation residues
EP3597632A1 (en) * 2018-07-18 2020-01-22 Covestro Deutschland AG Method for recovering diisocyantes from distillation remnants

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6955744B2 (en) 2000-08-10 2005-10-18 Bayer Cropscience Ag Method for purifying 2-chloro-5-chloromethylthiazole
KR100812657B1 (en) 2000-08-10 2008-03-13 바이엘 크롭사이언스 아게 Method for purifying 2-chloro-5-chloromethyl thiazole
WO2002012209A1 (en) * 2000-08-10 2002-02-14 Bayer Cropscience Ag Method for purifying 2-chloro-5-chloromethyl thiazole
US7592479B2 (en) 2002-09-27 2009-09-22 Basf Aktiengesellschaft Reprocessing of reaction material discharged from phosgenation reactors
WO2004031132A1 (en) * 2002-09-27 2004-04-15 Basf Aktiengesellschaft Reprocessing of reaction material discharged from phosgenation reactors
US7846304B2 (en) 2004-03-22 2010-12-07 Toyo Boseki Kabushiki Kaisha Process for purification of 2-chloro-5-chloromethyl-1,3-thiazole
US7531067B2 (en) * 2004-03-22 2009-05-12 Toyo Kasei Kogyo Company, Limited Process for purification of 2-chloro-5-chloromethyl-1,3-thiazole
WO2018134238A1 (en) * 2017-01-18 2018-07-26 Covestro Deutschland Ag Method for extracting diisocyanates from distillation residues
CN110167913A (en) * 2017-01-18 2019-08-23 科思创德国股份有限公司 The method of diisocyanate is recycled from bottoms
EP3597632A1 (en) * 2018-07-18 2020-01-22 Covestro Deutschland AG Method for recovering diisocyantes from distillation remnants
WO2020016142A1 (en) * 2018-07-18 2020-01-23 Covestro Deutschland Ag Method for recovering diisocyanates from distillation residues
CN112384496A (en) * 2018-07-18 2021-02-19 科思创德国股份有限公司 Process for recovering diisocyanates from distillation residues
CN112384496B (en) * 2018-07-18 2024-02-02 科思创德国股份有限公司 Method for recovering diisocyanate from distillation residue

Also Published As

Publication number Publication date
FR1495259A (en) 1967-12-18
NL6613340A (en) 1967-03-29

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