Chevron U.s.a. Inc.

Chevron Limited

Allen W Burton, Jr

Stacey Ian Zones

Cong-Yan Chen

Ann J Liang

Tracy Margaret Davis

Charles Kibby

Kenneth Ong

Robert James Saxton

Kandaswamy Jothimurugesan

Theodorus Ludovicus Michael Maesen

Tapan Kumar Das

Berend Smit

Tecle S Rufael

Ramzy M Shayib

Alfred Haas

Edith Beerdsen

Cabral M Williams

Tatsuya Okubo

Simon Holz

Shanmugam Palani Elangovan

A method of treating a cold-start engine exhaust gas stream comprising hydrocarbons and other pollutants, the method comprising: flowing the exhaust gas stream over a molecular sieve bed, the molecular sieve bed comprising an alkali metal cation-exchanged molecular sieve having intersecting 10- and 12-membered ring pore channels, to provide a first exhaust stream; flowing the first exhaust gas stream over a catalyst to convert any residual hydrocarbons and other pollutants contained in the first exhaust gas stream to innocuous products to provide a treated exhaust stream; and discharging the treated exhaust stream into the atmosphere.

Treatment of cold start engine exhaust

An aluminosilicate ZSM-12 may be prepared de novo in a small crystalline form from a reaction mixture containing a source of silica and a source of alumina. A small crystalline form of aluminosilicate ZSM-12 may also be prepared from a small crystalline form of borosilicate ZSM-12 by replacement of boron in the borosilicate ZSM-12 framework with aluminum. The aluminosilicate ZSM-12 is useful as an isomerization selective catalyst in processes such as isomerization dewaxing hydrocarbon feedstocks.

Method for making aluminosilicate ZSM-12

The present invention relates to a method for preparing LTA-type zeolites using tris[2-(isopropylamino)ethyl]amine as a structure directing agent.

Method for preparing LTA-type zeolites using a novel structure directing agent

The present invention is directed to processes using a borosilicate ZSM-48 as a catalyst for the selective hydroconversion of heavy normal paraffins into lighter normal paraffin products, with minimal formation of isoparaffins. The borosilicate ZSM-48 molecular sieve has a mole ratio of between 40 and 400 of silicon oxide to boron oxide, synthesized using novel structure directing agents.

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The present invention is directed to a borosilicate ZSM-48 molecular sieve having a mole ratio of between 40 and 400 of silicon oxide to boron oxide, synthesized using novel structure directing agents. Also disclosed are processes using a borosilicate ZSM-48 as a catalyst for the selective hydroconversion of heavy normal paraffins into lighter normal paraffin products, with minimal formation of isoparaffins.

Method for making borosilicate ZSM-48 molecular sieves

An aluminosilicate ZSM-12 may be prepared de novo in a small crystalline form from a reaction mixture containing a source of silica and a source of alumina A small crystalline form of aluminosilicate ZSM-12 may also be prepared from a small crystalline form of borosilicate ZSM-12 by replacement of boron in the borosilicate ZSM-12 framework with aluminum. The aluminosilicate ZSM-12 is useful as an isomerization selective catalyst in processes such as isomerization dewaxing hydrocarbon feedstocks.

Process for isomerizing a hydrocarbonaceous feedstock using aluminosilicate ZSM-12

The present invention is directed to a method for making a new crystalline molecular sieve designated SSZ-83 using a 1,4-bis(N-butylpiperidinium)butane dication or a 1,4-bis(N-butylpyrrolidinium)butane dication as a structure directing agent.

Method for making molecular sieve SSZ-83

The present invention is directed to a new crystalline molecular sieve designated SSZ-83 synthesized using a 1,4-bis(N-butylpiperidinium)butane dication or a 1,4-bis(N-butylpyrrolidinium)butane dication as a structure directing agent.

Molecular sieve SSZ-83

A process is disclosed for converting a feed comprising synthesis gas to liquid hydrocarbons within a single reactor at essentially common reaction conditions. The synthesis gas contacts a catalyst bed comprising a mixture of a synthesis gas conversion catalyst on a support containing an acidic component and a dual functionality catalyst including a hydrogenation component and a solid acid component. The hydrocarbons produced are liquid at about 0&#xb0; C., contain at least 25% by volume Cand are substantially free of solid wax.

Process of synthesis gas conversion to liquid fuels using mixture of synthesis gas conversion catalyst and dual functionality catalyst

A process is described for converting synthesis gas containing carbon monoxide and hydrogen to hydrocarbons via methanol as an intermediate, by contacting the synthesis gas with a catalyst system containing a mixture of gallium silicate zeolite catalyst and a methanol catalyst. The process results in reduced amounts of undesirable low carbon number hydrocarbons, e.g., Cand lower, undesirable high carbon number hydrocarbons, e.g., Cand higher, and aromatic hydrocarbons. The process provides higher yields of useful, high octane hydrocarbons boiling in the gasoline range.

Process for conversion of synthesis gas to hydrocarbons using a zeolite-methanol catalyst system

A process for directly preparing aluminum-containing molecular sieve SSZ-26 using a structure directing agent comprising a cis-N,N-diethyldecahydroquinolinium cation or mixture of a cis-N,N-diethyldecahydroquinolinium cation and a trans-N,N-diethyldecahydroquinolinium cation.

Process for preparing aluminum-containing molecular sieve SSZ-26

The present invention is directed to a new crystalline molecular sieve designated SSZ-82, a method for preparing SSZ-82 using a 1,6-bis(N-cyclohexylpyrrolidinium) hexane dication as a structure directing agent, and uses for SSZ-82. The molecular sieve has a mole ratio of 20 or greater of (1) an oxide of a first tetravalent element, e.g., silicon oxide to (2) an oxide of a trivalent element, pentavalent element or a second tetravalent element different from the first, e.g., aluminum oxide, gallium oxide, iron oxide, boron oxide, titanium oxide, or indium oxide.

Molecular sieve SSZ-82 composition of matter and synthesis thereof

The present invention relates to new crystalline molecular sieve SSZ-74 prepared using a hexamethylene-1,6-bis-(N-methyl-N-pyrrolidinium) dication as a structure-directing agent, and its use in treating engine exhaust.

Treatment of engine exhaust using molecular sieve SSZ-74

The present invention relates to new crystalline molecular sieve SSZ-75 having STI topology prepared using a tetramethylene-1,4-bis-(N-methylpyrrolidinium) dication as a structure-directing agent, and methods for synthesizing SSZ-75.

Molecular sieve SSZ-75 composition of matter and synthesis thereof

The present invention is directed to a process for preparing NES-type zeolites using novel nitrogen-based structure directing agents. The structure directing agents used in preparing NES-type zeolites selected from the group consisting of 1,4-bis(N,N-dimethylcyclohexylammonium) butane dications and 1,5-bis(N,N-dimethylcyclohexylammonium) pentane dications.

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Richmond, CA, United States of America

Allen W Burton, Jr