GB1271991A - Production and refining of isocyanates - Google Patents

Production and refining of isocyanates

Info

Publication number
GB1271991A
GB1271991A GB08545/69A GB1854569A GB1271991A GB 1271991 A GB1271991 A GB 1271991A GB 08545/69 A GB08545/69 A GB 08545/69A GB 1854569 A GB1854569 A GB 1854569A GB 1271991 A GB1271991 A GB 1271991A
Authority
GB
United Kingdom
Prior art keywords
reaction zone
phosgene
organic
organic amine
april
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
GB08545/69A
Inventor
Brenton Robinson Grant Jr
Carl Francis Irwin
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.)
EIDP Inc
Original Assignee
EI Du Pont de Nemours and Co
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 EI Du Pont de Nemours and Co filed Critical EI Du Pont de Nemours and Co
Publication of GB1271991A publication Critical patent/GB1271991A/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
    • C07C263/10—Preparation of derivatives of isocyanic acid by reaction of amines with carbonyl halides, e.g. with phosgene
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C2601/00—Systems containing only non-condensed rings
    • C07C2601/12—Systems containing only non-condensed rings with a six-membered ring
    • C07C2601/14—The ring being saturated

Landscapes

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

Abstract

1,271,991. Production of isocyanates. E. I. DU PONT DE NEMOURS & CO. 10 April, 1969 [11 April, 1968; 19 April, 1968], No. 18545/69. Heading C2C. A continuous process for the preparation of organic isocyanates comprises (1) continuously introducing an organic amine, at least 5 parts of an inert organic solvent per part by weight of organic amine, and at least 1À25 moles of phosgene per equivalent of organic amine into a constant composition primary reaction zone providing an average liquid residence time of from 20 to 120 minutes at a temperature of at least 105‹ C., (2) continuously removing from said primary reaction zone a gaseous mixture of phosgene and by-product HCl and a liquid reaction mass, (3) continuously contacting, in a secondary reaction zone, said removed liquid reaction mass with at least 0À75 moles of phosgene per equivalent of organic amine fed to said primary reaction zone, said secondary reaction zone providing an average liquid residence time of 5-45 minutes at a temperature of at least 130‹ C. and (4) continuously removing a gaseous mixture of phosgene and by-product hydrogen chloride and a solution of organic isocyanate from said secondary reaction zone.
GB08545/69A 1968-04-11 1969-04-10 Production and refining of isocyanates Expired GB1271991A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US72063068A 1968-04-11 1968-04-11
US72255968A 1968-04-19 1968-04-19

Publications (1)

Publication Number Publication Date
GB1271991A true GB1271991A (en) 1972-04-26

Family

ID=27110284

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08545/69A Expired GB1271991A (en) 1968-04-11 1969-04-10 Production and refining of isocyanates

Country Status (1)

Country Link
GB (1) GB1271991A (en)

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Legal Events

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