Process for separation of indole using X and Y type zeolites

摘要

A process for separating indole from a mixture of indole with at least one hydrocarbon or its derivative which comprises the steps of contacting the mixture with a faujasite structured zeolite to selectively adsorb indole on the zeolite and contacting a desorbent A selected from the group consisting of C2-10 aliphatic or C7-10 aromatic ether compounds, C2-10 aliphatic ester compounds and C3-10 aliphatic ketone compounds with the indole-adsorbed zeolite to separate indole and the process which comprises, in addition, the step of contacting at least one desorbent B of the formula, <IMAGE> wherein R1 is a C1-3 alkyl group, and R2 is a hydrogen atom or a C1-3 alkyl group, with the indole-adsorbed zeolite prior to the contact of the desorbent A with the indole-adsorbed zeolite.