GB1320879A - Purification of amines - Google Patents

Purification of amines

Info

Publication number
GB1320879A
GB1320879A GB1320879DA GB1320879A GB 1320879 A GB1320879 A GB 1320879A GB 1320879D A GB1320879D A GB 1320879DA GB 1320879 A GB1320879 A GB 1320879A
Authority
GB
United Kingdom
Prior art keywords
diamines
ortho
treatment
isomeric
diamine
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 GB1320879A publication Critical patent/GB1320879A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
    • C08G18/72—Polyisocyanates or polyisothiocyanates
    • C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
    • C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
    • C08G18/7614—Polyisocyanates or polyisothiocyanates cyclic aromatic containing only one aromatic ring
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
    • C08G18/72—Polyisocyanates or polyisothiocyanates
    • C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
    • C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
    • C08G18/7614—Polyisocyanates or polyisothiocyanates cyclic aromatic containing only one aromatic ring
    • C08G18/7621—Polyisocyanates or polyisothiocyanates cyclic aromatic containing only one aromatic ring being toluene diisocyanate including isomer mixtures

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

1320879 Purification of aromatic diamines IMPERIAL CHEMICAL INDUSTRIES Ltd 2 Feb 1972 [24 Feb 1971] 5338/71 Heading C2C Ortho-aromatic diamines are removed from a mixture of isomeric aromatic diamines by a process which comprises in sequence (1) removing ortho-diamines by physical treatment of the mixture and (2) further reducing the content of ortho-diamines by chemical treatment of the product of (1) from which ortho-diamines have already been partly removed. The physical treatment is preferably a distillation process and the chemical treatment preferably involves treatment with compounds containing the -NH-CO-NH- moiety or a compound which gives a compound containing this moiety by reaction with the diamine. The isomeric aromatic diamine is preferably isomeric tolylene diamine.
GB1320879D 1971-02-24 1971-02-24 Purification of amines Expired GB1320879A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB533871 1971-02-24

Publications (1)

Publication Number Publication Date
GB1320879A true GB1320879A (en) 1973-06-20

Family

ID=9794243

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1320879D Expired GB1320879A (en) 1971-02-24 1971-02-24 Purification of amines

Country Status (5)

Country Link
DE (1) DE2207492A1 (en)
FR (1) FR2127732A5 (en)
GB (1) GB1320879A (en)
IT (1) IT947736B (en)
NL (1) NL7202359A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001070666A1 (en) * 2000-03-20 2001-09-27 Albemarle Corporation Separation of 2,4-toluenediamine from an isomeric mixture of toluenediamines

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001070666A1 (en) * 2000-03-20 2001-09-27 Albemarle Corporation Separation of 2,4-toluenediamine from an isomeric mixture of toluenediamines
US6469212B1 (en) 2000-03-20 2002-10-22 Albemarle Corporation Separation of 2,4-toluenediamine from an isomeric mixture of toluenediamines

Also Published As

Publication number Publication date
FR2127732A5 (en) 1972-10-13
NL7202359A (en) 1972-08-28
IT947736B (en) 1973-05-30
DE2207492A1 (en) 1972-11-23

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Legal Events

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