Process for obtaining halogenated diphenols
AssigneeGeneral Electric Company
InventorsVictor Mark, Charles A. Wilson, II
Life of this patent
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Abstract
Highly pure dihalodiphenols or predetermined, statistical mixtures of unreacted, monohalo- and dihalodiphenols are obtained reacting the diphenol, which is suspended or dissolved in a suitable solvent, with a halogen while concurrently purging the reaction with a gas that is inert to the reaction.
Claims13
A halogenated diphenol mixture having a significantly reduced quantity of trihalo substituted and tetrahalo substituted diphenol, said mixture containing predetermined, statistical quantities of unreacted diphenol, monohalodiphenol and dihalodiphenol, said halogenated diphenol being represented by the general formula:
- ##STR9## wherein Xm and Xn are each independently a halogen and mixtures thereof;
- Y is independently selected from the group consisting of C.sub.1 -C.sub.4 alkyl and hydrogen;
- m and n are each 0-2 with the proviso that m+n equal at least 0.1, but more than 2.0;
- and, W is a member selected from the following group:
- (a) --CH.sub.2 --.sub.r wherein r is 0-10 with the proviso that when both Xm and Xn are chlorine and m and n are each 1, r is 0 or 2-10;
- (b) ##STR10## wherein R is a member of the group consisting of C.sub.1 -C.sub.10 alkyl and C.sub.6 -C.sub.14 aryl;
- (c) ##STR11## wherein R and R' can each independently be the same as R in (b) above;
- (d) ##STR12## wherein p and q can each independently be 0-1;
- and, (e) --O-- (e) cyclohexylidene;
- (f) 2,2,2-trichloroethylidene;
- (h) dichlorovinylidene.
Dependencies are inferred from the claim text.