Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal
Patent
1977-02-14
1978-07-25
Gotts, Lewis
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
C-metal
C07C 6802
Patent
active
041029127
ABSTRACT:
An improvement in the process of preparing a polyhalodiphenyl carbonate containing 6-10 halogen atoms from a reaction in a basic aqueous medium of a polyhalophenol and a carbonate precursor in the presence of a suitable catalyst, the improvement comprising reacting the components at a pH above about 10.5 in the presence of a solvent in which the polyhalodiphenyl carbonate is essentially insoluble and in which color bodies associated with polyhalophenol are soluble and retained. The improved process produces a polyhalodiphenyl carbonate which is essentially colorless and which possesses a low residual chloride content.
REFERENCES:
patent: 3017424 (1962-01-01), Meyer et al.
patent: 3275674 (1966-09-01), Bottenbruch et al.
patent: 4016190 (1977-04-01), Bockmann et al.
Eakin Molly C.
General Electric Company
Gotts Lewis
Mitri Salvatore C.
Mufatti William F.
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