Uop Lcc

Peter J Van Opdorp

Paolo Palmas

Robert L Mehlberg

Lev Davydov

Michael S Sandacz

Daniel Robert Johnson

Mohammad-Reza Mostofi-Ashtiani

Thomas W Lorsbach

Chad R Huovie

Lisa M Wolschlag

Karthikeyan Paramanandam

David A Lomas

Russell C Schulz

Richard R DeGraff

Brian Murray Wood

A process and apparatus for mixing streams of regenerated and carbonized catalyst involves passing a catalyst stream into and out of a chamber in a lower section of a riser. The chamber fosters mixing of the catalyst streams to reduce their temperature differential before contacting hydrocarbon feed.

Process and apparatus for mixing two streams of catalyst

Fluid catalytic cracking (FCC) processes are described, in which hydroprocessed hydrocarbon streams or other hydrocarbon feed streams having a low coking tendency are subjected to direct heat exchange with the FCC reactor effluent, for example in the FCC main column. The processes operate with sufficient severity such that little or no net FCC main column bottoms liquid (e.g., with a 343&#xb0; C. (650&#xb0; F.) distillation cut point) is generated. Regeneration temperatures with the representative low coking tendency feeds are beneficially increased by using an oxygen-enriched regeneration gas stream.

Direct feed/effluent heat exchange in fluid catalytic cracking

A process for the alkylation of aromatic hydrocarbons such as cumene and ethylbenzene is disclosed. A portion of the effluent stream from an alkylation reactor passes through an indirect heat exchanger to transfer heat to a flashed stream containing the product aromatic hydrocarbons. The heat exchanger recovers the exothermic heat of reaction from the effluent stream for use elsewhere in the process. This method of heat exchange is especially useful in alkylation processes where the temperature of the effluent stream is relatively low, such as where the alkylation reactor contains a zeolite catalyst.

Alkylation process with reactor effluent heat recovery

A process for the production of alkylaromatic hydrocarbons uses a high water content in an alkylation zone and a low water content in a transalkylation zone to improve yields improve process yields and catalyst life. An aromatic feed and an acyclic feed are first passed through the alkylation reaction zone that operates at a high water content. A separator receives the effluent from the alkylation reaction zone and removes water from a sidecut of unreacted aromatic feed. The sidecut of aromatic feed and a stream of polyalkylated aromatics are contacted in the transalkylation zone. The differing water content improves the operation of both the alkylation zone and the transalkylation zone.

Process for wet aromatic alkylation and dry aromatic transalkylation

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Naperville, IL, United States of America

Peter J Van Opdorp