Method for preparing bischloroformate compositions

Organic compounds -- part of the class 532-570 series – Organic compounds – Halocarbonate esters

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C07C 6996, C07C 6802

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046018581

ABSTRACT:
Bischloroformate compositions are prepared by passing gaseous phosgene into an agitated aqueous solution of a di-(alkali metal) salt of an organic dihydroxy compound such as bisphenol A, while maintaining said solution at a temperature within the range of about 0.degree.-50.degree. C. Phosgene passage and agitation are continued until the bischloroformate composition has precipitated. The reaction is typically complete when the pH of the aqueous phase drops below 7.

REFERENCES:
patent: 3189640 (1965-06-01), Dietrich et al.
patent: 3254051 (1966-05-01), Schmitt
patent: 3959335 (1976-05-01), Vernaleken et al.

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