Process for the preparation of tetrachloroterephthaloyl dichloride by means of the chlorination of terephthaloyl dichloride with gaseous chlorine

摘要

The invention relates to a process for the preparation of tetrachloroterephthaloyl dichloride by means of the chlorination of terephthaloyl dichloride with gaseous chlorine, characterized in that said chlorination is carried out in the vapor phase in the presence of activated charcoal as catalyst. The invention relates also to the synthesis processes in which the compound prepared according to the process said is used as an intermediate.