PROCESS FOR PREPARING VINYL ESTERS OF TERTIARY CARBOXYLIC ACIDS

摘要

A process for preparing vinyl esters of tertiary carboxylic acids by liquid phase addition of acetylene and tertiary carboxylic acids in the presence of metal salts of the tertiary carboxylic acids is disclosed. By subjecting the catalyst into a pre-activation and controlling the per pass conversation rate of free tertiary carboxylic acid during the reaction, the activity of catalyst, the selectivity of tertiary carboxylic acid for vinyl ester thereof, the per pass conversion rate of acetylene, and/or the selectivity of acetylene for vinyl ester of the tertiary carboxylic acid are improved.