Catalyst for dehalogenation of alpha-halogenated carboxylic acids/esters
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United States of America Patent
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Jan 11, 1994
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app pub date -
Oct 30, 1992
filing date -
Apr 7, 1989
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Abstract
The alpha-halogenated carboxylic acids/esters are dehalogenated by reaction with hydrogen in the presence of a catalytically effective amount of (i) a Group VIII precious metal catalyst and (ii) either sulfur or a sulfur compound, or (iii) a novel precious metal/sulfur solid phase catalyst; the subject dehalogenation is especially adapted for enriching the monochloroacetic acid content of MCAA/DCAA mixtures.
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