Process for preparing perfluorinated bromoalkanes, or perfluorinated bromoalkanes containing ether groups
AssigneeHoechst Aktiengesellschaft
InventorHans Millauer
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Abstract
Perfluorinated bromoalkanes of the formula X--(CF.sub.2).sub.p --Br (I), in which X is hydrogen or fluorine and p is an integer from 2 to 10, or perfluorinated bromoalkanes which contain ether groups, of the formula ##STR1## in which q is zero or an integer from 1 to 4, are obtained by electrolytic decarboxylation of a perfluorinated alkanecarboxylic acid of the formula X--(CF.sub.2).sub.p --COOH (II), in which X is hydrogen or fluorine and p is an integer from 2 to 10, or an alkanecarboxylic acid which contains ether groups, of the formula ##STR2## in which q is zero or an integer from 1 to 4. The electrolytic decarboxylation is carried out in an aqueous electrolyte in the presence of bromine and an aliphatic nitrile.
Claims15
A process for preparing perfluorinated bromoalkanes of the formula
- X--(CF.sub.2).sub.p --Br (I) ,
- in which X is hydrogen or fluorine and p is an integer from 2 to 10, or perfluorinated bromoalkanes which contain ether groups, of the formula ##STR5## in which q is zero or an integer from 1 to 4, which comprises subjecting a perfluorinated alkanecarboxylic acid of the formula
- X--(CF.sub.2).sub.p --COOH (II),
- in which X is hydrogen or fluorine and p is an integer from 2 to 10, or an alkanecarboxylic acid which contains ether groups, of the formula ##STR6## in which q is zero or an integer from ! to 4, to electrolytic decarboxylation in an aqueous electrolyte in the presence of bromine and an aliphatic nitrile.
Dependencies are inferred from the claim text.