GB988966A - Purification of organic isocyanates - Google Patents

Purification of organic isocyanates

Info

Publication number
GB988966A
GB988966A GB1088563A GB1088563A GB988966A GB 988966 A GB988966 A GB 988966A GB 1088563 A GB1088563 A GB 1088563A GB 1088563 A GB1088563 A GB 1088563A GB 988966 A GB988966 A GB 988966A
Authority
GB
United Kingdom
Prior art keywords
isocyanate
so2cl
cocl
compound
formula
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
GB1088563A
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.)
Olin Corp
Original Assignee
Olin Corp
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 Olin Corp filed Critical Olin Corp
Publication of GB988966A publication Critical patent/GB988966A/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
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D307/00—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom
    • C07D307/02—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings
    • C07D307/04—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings having no double bonds between ring members or between ring members and non-ring members
    • C07D307/10—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings having no double bonds between ring members or between ring members and non-ring members with substituted hydrocarbon radicals attached to ring carbon atoms
    • C07D307/14—Radicals substituted by nitrogen atoms not forming part of a nitro radical

Landscapes

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

Abstract

An organic isocyanate is recovered from a crude reaction mixture containing said isocyanate by distilling the isocyanate from the said mixture in the presence of from about 5% to about 200%, based on the weight of the said isocyanate, of a material which is a liquid under the conditions of the distillation and has a boiling point higher than that of the isocyanate under the conditions of the distillation, the said material consisting of (A) a compound of the formula CH3(CH2)nR, wherein R is -COCl or -SO2Cl and n is an integer of 5 to 20, (B) a compound of the formula R1(CH2)nR2, wherein R1 is phenyl or naphthyl, R2 is -COCl or -SO2Cl and n is an integer of 1 to 4, (C) a compound of the formula <FORM:0988966/C2/1> wherein R3 is hydrogen or an alkyl radical containing 1 to 5 carbon atoms and R4 is -COCl or -SO2Cl, or (D) a compound of the formula <FORM:0988966/C2/2> wherein R5 is an alkyl radical containing 1 to 5 carbon atoms and R6 is -COCl or -SO2Cl. The initial crude reaction mixture may be obtained, for example, by reacting phosgene with an amine or amine salt. Many suitable carboxylic and sulphonic acid chlorides of the above types are specified. The isocyanate may be an unsubstituted or substituted aliphatic, cycloaliphatic, aromatic or heterocyclic compounds, many being specified. Examples are given.
GB1088563A 1962-04-02 1963-03-19 Purification of organic isocyanates Expired GB988966A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US18451262A 1962-04-02 1962-04-02

Publications (1)

Publication Number Publication Date
GB988966A true GB988966A (en) 1965-04-14

Family

ID=22677183

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1088563A Expired GB988966A (en) 1962-04-02 1963-03-19 Purification of organic isocyanates

Country Status (4)

Country Link
BE (1) BE630474A (en)
DE (1) DE1231689B (en)
GB (1) GB988966A (en)
NL (1) NL290965A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011051467A1 (en) 2011-06-30 2013-01-03 Buss-Sms-Canzler Gmbh Process for the recovery of tolylene diisocyanate from liquid residues of toluene diisocyanate production

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2437867A (en) * 1946-06-01 1948-03-16 Du Pont Organic isocyanates

Also Published As

Publication number Publication date
NL290965A (en) 1965-06-25
BE630474A (en) 1963-11-04
DE1231689B (en) 1967-01-05

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