GB1353787A - Process for the purification of isocyanates - Google Patents

Process for the purification of isocyanates

Info

Publication number
GB1353787A
GB1353787A GB1353787DA GB1353787A GB 1353787 A GB1353787 A GB 1353787A GB 1353787D A GB1353787D A GB 1353787DA GB 1353787 A GB1353787 A GB 1353787A
Authority
GB
United Kingdom
Prior art keywords
isocyanates
sept
isocyanate
inert liquid
purification
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
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 GB1353787A publication Critical patent/GB1353787A/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

1353787 Purifying isocyanates IMPERIAL CHEMICAL INDUSTRIES Ltd 6 Sept 1972 [27 Sept 1971] 44880/71 Heading C2C In a process for the continuous distillation of high melting isocyanates, the isocyanate is fed to the distillation apparatus in the form of a dispersion in an inert liquid of boiling point higher than that of the isocyanate. The inert liquid may be a high boiling aliphatic, aromatic or araliphatic hydrocarbon or mixture thereof, preferably liquid paraffin.
GB1353787D 1971-09-27 1971-09-27 Process for the purification of isocyanates Expired GB1353787A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4488071 1971-09-27

Publications (1)

Publication Number Publication Date
GB1353787A true GB1353787A (en) 1974-05-22

Family

ID=10435100

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1353787D Expired GB1353787A (en) 1971-09-27 1971-09-27 Process for the purification of isocyanates

Country Status (5)

Country Link
JP (1) JPS4840719A (en)
DE (1) DE2246920A1 (en)
FR (1) FR2155362A5 (en)
GB (1) GB1353787A (en)
NL (1) NL7213043A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5354432A (en) * 1991-12-23 1994-10-11 Bayer Aktiengesellschaft Process for the production of isocyanates and for working up the residue
EP3736263A1 (en) * 2019-05-07 2020-11-11 Covestro Deutschland AG Method for the purification of isocyanates

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6054349A (en) * 1983-09-05 1985-03-28 Mitsui Toatsu Chem Inc Purification of organic isocyanate
JP4995383B2 (en) * 2001-08-03 2012-08-08 日本曹達株式会社 Method for purifying high melting point and high boiling point polyisocyanates
WO2021148419A1 (en) * 2020-01-22 2021-07-29 Covestro Deutschland Ag Method for recovering diisocyanates from distillation residues

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5354432A (en) * 1991-12-23 1994-10-11 Bayer Aktiengesellschaft Process for the production of isocyanates and for working up the residue
EP3736263A1 (en) * 2019-05-07 2020-11-11 Covestro Deutschland AG Method for the purification of isocyanates
WO2020225088A1 (en) * 2019-05-07 2020-11-12 Covestro Intellectual Property Gmbh & Co. Kg Method for the purification of isocyanates
CN114026064A (en) * 2019-05-07 2022-02-08 科思创知识产权两合公司 Method for purifying isocyanates

Also Published As

Publication number Publication date
NL7213043A (en) 1973-03-29
FR2155362A5 (en) 1973-05-18
JPS4840719A (en) 1973-06-15
DE2246920A1 (en) 1973-04-05

Similar Documents

Publication Publication Date Title
GB1389240A (en) Hydrocarbon separation process
CA982157A (en) Process for separating and purifying acetylene from a gaseous mixture comprised of acetylene and ethylene
GB1276792A (en) Acetone purification process
GB1402436A (en) Selective adsorption of butene-1
GB1353787A (en) Process for the purification of isocyanates
GB1174953A (en) Method of Manufacture of Terephthalic Acid
ES306649A1 (en) A procedure for continuous recovery of p-xylene from liquid mixtures containing p-xylene. (Machine-translation by Google Translate, not legally binding)
GB1384065A (en) Process for the purification of organic isocyanates
GB1386850A (en) Hydrocarbon separation process
GB1104395A (en) Separation process
CA972313A (en) Method of reducing corrosion of equipment in a process for the purification of a chlorinated hydrocarbon
GB1129637A (en) Process for separating chlorine from phosgene
GB1359274A (en) Purification of crude 2-mercaptobenzothiazole
GB1041442A (en) Process for the purification of hexamethylenediamine
GB1457065A (en) Photochemical method of preparing hydrocarbon derivarives
ES403904A1 (en) Process for the production and separation of hydroxylamino anthraquinone isomers
ES381332A1 (en) Process for producing a mixture of high-purity c{11 aromatic hydrocarbons
ES442261A1 (en) Process for the preparation of halogenoanthraquinones
ES364169A1 (en) Dehydrocyclization process
GB1338901A (en) Production of propylene oxide
GB1413224A (en) Purifying 1,4-dicyanobutenes
GB1320879A (en) Purification of amines
GB944309A (en) Polymerisation of organic isocyanates
GB1219738A (en) A process for the separation of nitroethane from a mixture of nitroalkanes
ES378040A1 (en) Process for the manufacture of boric acid

Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees