Chevron Phillips Chemical Company LP

Chevron Research & Technology Company

Chevron U.s.a. Inc.

Chevron Research Company

Chevron Chemical Company LLC

Other

Chevron Limited

Dennis L Holtermann

Stacey Ian Zones

Donald S Santilli

Robert A Innes

James Nathan Ziemer

Theresa A Pecoraro

Tin-Tack Peter Cheung

Andrew Rainis

Charles R Wilson

Christopher D Blessing

Lawrence W Jossens

Gyanesh P Khare

Daniel M Hasenberg

Scott H Brown

Daniel B Knorr, Jr

David J Glova

Warren E Brown

Max P McDaniel

Qing R Yang

Leslie Ann Field

Ted H Cymbaluk

Bernard F Mulaskey

Robert L Jacobson

Joseph Bergmeister, Iii

Daniel P Hagewiesche

Richard C Robinson

David W Dockter

Michio Sugimoto

Robert L Hise

Hiroshi Ohashi

Hong Chiu Chen

Geoffrey E Scanlon

Richard M Wolpert

Lawrence E Huff

Wayne S Masumura

Tony R Crain

John V Heyse

William A Blanton, Jr

James V Kennedy

Harris E Kluksdahl

Stacy I Zones

Daniel B Knorr

Ann Marie Hall

Methods for preparing single and dual metallocene catalyst systems containing an activator-support are disclosed. These methods can include precontacting of the activator-support and an organoaluminum compound, as well as sequential contacting of two different metallocene compounds to form a dual metallocene catalyst system.

Processes for preparing metallocene-based catalyst systems

A method of removing a metal protective layer from a surface of a reactor component comprising treating the metal protective layer with one or more chemical removal agents to remove at least a portion of the metal protective layer from the reactor component. A method of removing a metal protective layer from a surface of a reactor component comprising treating the metal protective layer to remove the metal protective layer from the reactor component, and determining a thickness of the reactor component following treatment.

Methods of removing a protective layer

A hydrocarbon aromatization process comprising adding a nitrogenate, an oxygenate, or both to a hydrocarbon stream to produce an enhanced hydrocarbon stream, and contacting the enhanced hydrocarbon stream with an aromatization catalyst, thereby producing an aromatization reactor effluent comprising aromatic hydrocarbons, wherein the catalyst comprises a non-acidic zeolite support, a group VIII metal, and one or more halides. Also disclosed is a hydrocarbon aromatization process comprising monitoring the presence of an oxygenate, a nitrogenate, or both in an aromatization reactor, monitoring at least one process parameter that indicates the activity of the aromatization catalyst, modifying the amount of the oxygenate, the nitrogenate, or both in the aromatization reactor, thereby affecting the parameter.

Method of enhancing an aromatization catalyst

A method for reducing catalyst contamination in a hydrocarbon conversion reactor system, comprising the steps of contacting at least a portion of a metal-coated hydrocarbon conversion reactor system comprising a reactive metal with a getter to produce a movable metal; and fixating the movable metal.

Method for removing reactive metal from a reactor system

A method of removing reactive metal from a metal-coated reactor system, comprising contacting at least a portion of a metal-coated reactor system containing reactive metal with a getter to produce movable metal, and fixating the movable metal, the getter, or both. The contacting is preferably done prior to catalyst loading. A preferred coating metal comprises tin and a preferred getter comprises HCl. The invention is also a method for reducing catalyst contamination from a metal which was used to coat a reactor system. The method comprises contacting a metal-coated reactor system, with a gaseous halogen-containing compound to produce movable metal; thereafter or simultaneously, at least a portion of the movable metal is removed from the reactor system. Then a halided catalyst is loaded into the reactor system.

A catalytic reforming process comprising the catalytic conversion of hydrocarbons to aromatics, said process comprising treating a halided zeolite catalyst (hiz-cat) containing a Group VIII metal at commercial startup conditions and then reforming hydrocarbons, wherein said catalyst is prepared by washing a bound zeolite catalyst base or a bound zeolite catalyst before halide addition. A preferred hiz-cat is a non-acidic Pt K L-zeolite catalyst prepared by a process that includes the steps of preparing a calcined silica-bound K L-zeolite catalyst base; washing said bound zeolite catalyst base with a liquid comprising water; and incorporating Pt and halogen-containing compound(s) comprising chlorine and fluorine into said washed catalyst base. Ammonium chloride and ammonium fluoride are preferred halide sources.

Reforming using a bound halided zeolite catalyst

A crystalline zeolite SSZ-25 is prepared using an adamantane quaternary ammonium ion as a template.

Isomerization process using zeolite SSZ-25

A catalytic reforming process using a halided zeolite catalyst containing platinum in a metal-coated reactor system where, prior to catalyst loading and reforming, halide acid is removed from the catalyst. The process comprises providing a reforming reactor system having a metal coating; providing a halided zeolite catalyst containing platinum prepared by a method which includes removing volatile halide acid; loading said catalyst into said reactor system; and catalytically reforming hydrocarbons to aromatics, wherein metal from the metal-coated reactor system does not deactivate the catalyst. The coating metal preferably comprises tin and the zeolite catalyst is preferably a platinum L-zeolite catalyst. The invention is also a method for reducing catalyst contamination from a metal which was used to coat a reactor system. The method comprises pretreating a halided catalyst with hydrogen to remove volatile halide acid. The resulting catalyst is then loaded into a metal-coated reactor system and hydrocarbons are converted.

Reforming process with catalyst pretreatment

A process for regenerating a coke contaminated reforming catalyst comprising platinum on a molecular sieve, said process consisting essentially of contacting said catalyst with a halogen-free oxygen-containing gas at a temperature of less than 780.degree. F. for a sufficient period of time such that the aromatization activity is restored to within 20.degree. F. of the activity said catalyst possessed at the start of the previous run cycle.

Low temperature regeneration of coke deactivated reforming catalysts

A crystalline low-aluminum boron beta zeolite is used for dewaxing hydrocarbonaceous feeds.

Low-Aluminum boron beta zeolite

Growing community of inventors

Crockett, CA, United States of America

Dennis L Holtermann