Dilute liquid phase alkylation

摘要

Methods of forming ethylbenzene are described herein. In one embodiment, the method includes contacting dilute ethylene with benzene in the presence of an alkylation catalyst to form ethylbenzene, wherein such contact occurs in a liquid phase reaction zone and recovering ethylbenzene from the reaction zone.

主权项

1. A method of forming ethylbenzene comprising:
contacting a dilute ethylene stream with benzene at a molar ratio of benzene to ethylene of about 10:1 or less in a catalyst bed in a presence of an alkylation catalyst comprising a zeolite beta promoted with cerium and having a silica to alumina molar ratio of from about 10:1 to about 200:1 to thereby react the benzene with the ethylene, forming ethylbenzene and the catalyst becomes deactivated, wherein the contact occurs in a liquid phase reaction zone, and wherein the dilute ethylene stream comprises less than about 50% ethylene, and wherein the dilute ethylene stream is produced from fluid catalytic cracking; recovering a product stream comprising the ethylbenzene from the liquid phase reaction zone; and regenerating the deactivated alkylation catalyst to produce a regenerated catalyst comprising: taking a reactor of the liquid phase reaction zone offline; purging the alkylation catalyst disposed in the reactor with an inert gas at a purging temperature; heating the alkylation catalyst to a first temperature for a time period sufficient to provide an output stream having an oxygen content of about 0.5%; heating the alkylation catalyst to a second temperature higher than the first temperature for time period sufficient to provide an output stream having an oxygen content of about 2.0%; wherein the first and second temperature are from about 50° C. to 200° C. above the purging temperature; and reusing the regenerated catalyst.