Exxon Research and Engineering Company

Exxon Chemical Patents, Inc.

Exxon Chemical Pateuts Inc.

Larry L Iaccino

Jeremy W Bedard

Romain Ov Lemoine

Wenyih F Lai

Robert J Wittenbrink

Nicolas P Coute

Stephen Mark Davis

Kevin Cp Leung

Ramesh Gupta

Edward Stanley Ellis

James J Schorfheide

Henry Jung

Barrington M Hammond

Derrick D Pete

David D Rosenfeld

Christopher M Evans

Kevin Leung

Karl G Strohmaier

Robert T Carr

A hydroprocessing process includes a cocurrent flow liquid reaction stage, a countercurrent flow liquid reaction stage and a vapor reaction stage in which feed components are catalytically hydroprocessed by reacting with hydrogen. Both liquid stages both produce a liquid and a vapor effluent, with the cocurrent stage liquid effluent the feed for the countercurrent stage and the countercurrent stage liquid effluent the hydroprocessed product liquid. Both liquid stage vapor effluents are combined and catalytically reacted with hydrogen in a vapor reaction stage, to form a hydroprocessed vapor. This vapor is cooled to condense and recover a portion of the hydroprocessed hydrocarbonaceous vapor components as additional product liquid. The uncondensed vapor is rich in hydrogen and is cleaned up if necessary, to remove contaminants, and then recycled back into the cocurrent stage as hydrogen-containing treat gas. Fresh hydrogen is introduced into the countercurrent stage and the countercurrent stage effluent contains sufficient, and preferably all of the hydrogen for the vapor stage reaction.

Combination cocurrent and countercurrent staged hydroprocessing with a

A process for upgrading petroleum feedstocks boiling in the distillate plus range, which feedstocks, when cracked, result in unexpected high yields of olefins. The feedstock is hydroprocessed in at least one reaction zone countercurrent to the flow of a hydrogen-containing treat gas. The hydroprocessed feedstock is then subjected to thermal cracking in a steam cracker or to catalytic cracking in a fluid catalytic cracking process. The resulting product slate will contain an increase in olefins compared with the same feedstock, but processed in by a conventional co-current hydroprocessing process.

Process for increased olefin yields from heavy feedstocks

The present invention relates to a process for heteroatom removal, particularly during process excursions, from petroleum and chemical hydrocarbon streams. The invention is comprised of at least two zones through which the hydrocarbon stream and a hydrogen containing treat gas flow. The first zone contains a bed of heteroatom hydroprocessing catalyst in contact with hydrogen-containing treat gas and the second zone contains heteroatom sorbent material(s) through which the hydrocarbon stream flows countercurrent to the up flowing hydrogen-containing treat gas.

Heteroatom removal through countercurrent sorption

A process for converting a Fischer-Tropsch light oil stream to jet fuel by reacting said stream with a hydroisomerization catalyst in a reaction zone where the stream flows countercurrent to upflowing hydrogen-containing treat gas.

Conversion of fischer-tropsch light oil to jet fuel by countercurrent

A process for converting Fischer-Tropsch wax streams to lubricants by reacting said stream with a dewaxing catalyst in a reaction zone where the stream flows countercurrent to upflowing hydrogen-containing treat gas.

Conversion of fisher-tropsch waxes to lubricants by countercurrent

The present invention provides a process for cracking or decomposing a feedstream containing a major proportion of at least one dialkyl ether to produce the corresponding olefins comprising contacting the feedstream with a faujasite aluminosilicate catalyst which is characterized in that at least about 50 wt. % of the alkali metal content originally present in said faujasite has been exchanged by at least one alkaline earth metal. The decomposition is preferably conducted in the vapor phase at preferred temperatures in the range of from about 125.degree. F. to about 600.degree. F. The process offers the advantages of longer catalyst life coupled with high yield and selectivity rates towards olefin production.

Production of olefins

Growing community of inventors

Friendswood, TX, United States of America

Larry L Iaccino