Vapor phase dechlorination process

摘要

This invention provides a selective dechlorination process that comprises contacting a vaporized mixture of methyl 2,5-dichlorobenzoate and hydrogen, in a molar ratio respectively of 1:3-4, optionally together with between about 1% and about 10% of methanol by weight of methyl 2,5-dichlorobenzoate with a nickel catalyst at a temperature between about 200 DEG C. and about 300 DEG C. and for a residence time of between about 2.0 seconds and about 5.0 seconds.