Patent ID: 9556083
Date: 2017-01-31
CPC Classifications: B01J,C07C,Y02P

Claim:
1. A process comprising: introducing an input stream comprising an aromatic compound and a first level of catalyst poisons into a preliminary alkylation system, wherein the preliminary alkylation system comprises a preliminary alkylation catalyst that is a zeolite beta; withdrawing a first output stream from the preliminary alkylation system, wherein the first output stream comprises a second level of catalyst poisons that is at least 10% less than the first level of catalyst poisons; introducing at least a part of the first output stream and an alkylating agent into an alkylation system, wherein the alkylation system comprises an alkylation catalyst that is a zeolite MCM-22, wherein the alkylation system has a first SiO operating the alkylation system under alkylation conditions to produce an alkylaromatic compound; and withdrawing from the first alkylation system a second output stream comprising the alkylaromatic compound.