Chevron Chemical Company LLC

Chevron Phillips Chemical Company LP

Chevron Research & Technology Company

Chevron U.s.a. Inc.

Chevron Research Company

Other

Charles D. Buscemi

John V. Heyse

John V Heyse

Bernard F Mulaskey

Daniel P Hagewiesche

Robert A Innes

Steven E Trumbull

Alan G Kunze

Robert L Hise

David C Kramer

William James Cannella

Paul M Spindler

Hye Kyung Cho Timken

Gale L Hubred

Rahul Shankar Bhaduri

Steven Clay Moore

Viorel Duma

Jeff Johns

Paul G Johnson

Charles D Buscemi

Randall J Harris

Paul F Bryan

Dennis L Holtermann

Hye Kyung Timken

David R Johnson

Warren E Brown

Bernard F Mulasky

Donald F Byrne

Provided is a hydro-regeneration catalyst system, comprising:

Regeneration of an ionic liquid catalyst by hydrogenation using a macroporous noble metal catalyst

The present disclosure provides a macroporous noble metal catalyst and processes employing such catalysts for the regeneration of deactivated ionic liquid catalyst containing conjunct polymer.

Carburization and metal-dusting while hydrodealkylating a hydrodealkylatable hydrocarbon are reduced even in the substantial absence of added sulfur.

Hydrodealkylation processes

A improved hydrocarbon conversion process, comprising applying a plating, cladding, paint or other coating to at least a portion of a hydrocarbon conversion reactor system which is used to convert hydrocarbons to products in the presence of steam, said coating being effective to reduce the amount of undesirable by-products in said process; and operating the hydrocarbon conversion process at a steam to hydrocarbon ratio that is lower than the steam to hydrocarbon ratio at which said process was operated prior to applying said coating. Preferred hydrocarbon conversion process includes steam cracking of hydrocarbons to produce ethylene and dehydrogenation of ethylbenzene to styrene.

Increasing production in hydrocarbon conversion processes

Disclosed is a method for reforming hydrocarbons comprising contacting the hydrocarbons with a catalyst in a reactor system of improved resistance to carburization and metal dusting under conditions of low sulfur.

Apparatus for hydrocarbon processing

Methods for cracking hydrocarbons in reactor systems having improved resistances to carburization and coking. The reactor system comprises a steel portion having provided thereon a chromium protective layer to isolate the steel portion from hydrocarbons, applied to a thickness effective for completely isolating the steel portion from the hydrocarbon environment. The protective layer is anchored to the steel substrate through an intermediate carbide-rich, bonding layer.

Cracking processes

A method of protecting carbon and low-alloy steels from high temperature hydrogen attack. A carbon or low-alloy steel portion of a reactor system that is to be contacted with high pressure hydrogen at elevated temperatures is provided with an intermetallic, diffusion barrier layer that reduces the rate of hydrogen attack at least ten-fold compared to the steel portion without the diffusion barrier layer.

Diffusion barriers for preventing high temperature hydrogen attack

Low-sulfur reforming process

Carburization and metal-dusting while hydrodealkylating a hydrodealkylatable hydrocarbon are reduced even in the substantial absence of sulfur.

Methods for cracking hydrocarbons in reactor systems having improved resistances to carburization and coking. The reactor system comprises a steel portion having provided thereon a Group VIB metal protective layer to isolate the steel portion from hydrocarbons, applied to a thickness effective for isolating the steel portion from the hydrocarbon environment. The protective layer is anchored to the steel substrate through an intermediate carbide-rich, bonding layer.

A hydrocarbon conversion process wherein austenitic stainless steel portions that are subject to halide stress-corrosion cracking conditions, such as the colder portions of the process equipment including effluent coolers, knockout drums, accumulation drums, and piping low points, are provided with a protective layer having improved halide stress-corrosion cracking resistance. The method comprises applying a metal cladding, plating, paint or other coating to a stressed portion of austenitic stainless steel hydrocarbon conversion process equipment, optionally curing the coated steel to form intermetallic compounds to protect the steel portions; converting hydrocarbons utilizing a halided catalyst or under conditions where a halogen-containing compound is added or evolved or both; and subjecting the protected steel portion to halide stress-corrosion cracking conditions. A preferred coating material comprises tin, and preferably one or more intermetallic layers are provided to at least a portion of an austenitic stainless steel substrate to improve its stress-corrosion cracking resistance.

Hydrocarbon processing in equipment having increased halide

Disclosed are methods for dehydrogenation in reactor systems of improved resistance to carburization under dehydrogenation conditions.

Dehydrogenation processes, equipment and catalyst loads therefor

Method for increasing carburization resistance

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Crockett, CA, United States of America

John V Heyse