GB817368A - Preparation of isocyanates - Google Patents

Preparation of isocyanates

Info

Publication number
GB817368A
GB817368A GB14492/57A GB1449257A GB817368A GB 817368 A GB817368 A GB 817368A GB 14492/57 A GB14492/57 A GB 14492/57A GB 1449257 A GB1449257 A GB 1449257A GB 817368 A GB817368 A GB 817368A
Authority
GB
United Kingdom
Prior art keywords
isocyanate
lithium
isothiocyanate
phosphorus
chloride
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
GB14492/57A
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.)
Virginia Carolina Chemical Corp
Original Assignee
Virginia Carolina Chemical 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 Virginia Carolina Chemical Corp filed Critical Virginia Carolina Chemical Corp
Publication of GB817368A publication Critical patent/GB817368A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B25/00—Phosphorus; Compounds thereof
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B25/00—Phosphorus; Compounds thereof
    • C01B25/10—Halides or oxyhalides of phosphorus
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B33/00—Silicon; Compounds thereof
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
    • C01C3/00—Cyanogen; Compounds thereof
    • C01C3/20—Thiocyanic acid; Salts thereof

Landscapes

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

Abstract

A silicon isocyanate or isothiocyanate, or a phosphorus isocyanate or isothiocyanate, is produced together with lithium chloride by reacting silicon tetrachloride or phosphorus trichloride with lithium isocyanate or isothiocyanate. Depending on the amount of lithium isocyanate or isothiocyanate employed one or more chlorine atoms of the silicon tetrachloride or phosphorus trichloride are replaced by an isocyanate or isothiocyanate group. The silicon or phosphorus chloride may be added to a suspension of lithium isocyanate or isothiocyanate in an inert organic liquid which is a solvent for the isocyanate product but not for the lithium chloride also produced and heating the mixture under reflux. Solvents specified are benzene, toluene, xylene, mesitylene, ethylbenzene, n-propylbenzene, cumene, naphthalene and tetrahydronaphthalene. The lithium chloride product may be converted into lithium carbonate by reaction with sodium carbonate, and the lithium carbonate may be converted into lithium isocyanate or isothiocyanate for recycling to the process by heating with urea or thiourea. Three examples are given.
GB14492/57A 1956-07-03 1957-05-07 Preparation of isocyanates Expired GB817368A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US817368XA 1956-07-03 1956-07-03

Publications (1)

Publication Number Publication Date
GB817368A true GB817368A (en) 1959-07-29

Family

ID=22166053

Family Applications (1)

Application Number Title Priority Date Filing Date
GB14492/57A Expired GB817368A (en) 1956-07-03 1957-05-07 Preparation of isocyanates

Country Status (1)

Country Link
GB (1) GB817368A (en)

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