Abstract: The present invention is directed to a process for preparing CHA-type molecular sieves using at least one cationic 1,4-diazabicyclo[2.2.2]octane-based structure directing agent in conjunction with at least one cationic cyclic nitrogen-containing structure directing agent.
Abstract: 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.
Abstract: The present invention is directed to a process for isomerizing light paraffins by using a catalyst containing a zeolite selected from the group consisting of CON- and TUN-type zeolites, and at least one Group VIII metal. It has been found that the CON- and TUN-type zeolite catalysts of the present invention selectively convert C6 paraffins into the more favorable higher octane C6 isomer, namely 2,3-dimethylbetane (RON 101.0), over the less favorable C6 isomer, namely octane 2,2-dimethylbutane (RON 91.8).
Abstract: The present invention relates to new crystalline molecular sieve SSZ-75 prepared using a tetramethylene-1,4-bis-(N-methylpyrrolidinium) dication as a structure-directing agent, and its use in catalysts for hydrocarbon conversion reactions.
Type:
Grant
Filed:
January 14, 2010
Date of Patent:
May 15, 2012
Assignee:
Chevron U.S.A. Inc.
Inventors:
Stacey Zones, Allen Burton, Theodorus Ludovicus Michael Maesen, Berend Smit, Edith Beerdsen
Abstract: 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.
Abstract: 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.
Abstract: 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.
Abstract: Disclosed is a method for preparing crystalline small pore molecular sieves, said method comprising (a) preparing a reaction mixture comprising (1) at least one active source of an oxide of a tetravalent element or mixture of tetravalent elements, (2) optionally at least on active source of an oxide of a trivalent element or mixture of trivalent elements, (3) at least one active source of an alkali metal, (4) seed crystals capable of forming the small pore molecular sieve, (5) a structure directing agent capable of forming the small pore molecular sieve, and (6) an amount of water that is not substantially in excess of the amount required to cause and maintain crystallization of the small pore molecular sieve; and (b) heating said reaction mixture at crystallization conditions for sufficient time to form crystallized material containing crystals of the small pore molecular sieve.
Abstract: Crystalline molecular sieves are prepared using a mixture comprising an organic structure directing agent capable of forming the molecular sieve, and an N,N,N-trialkyl benzyl quaternary ammonium cation.
Abstract: 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.
Abstract: The present invention relates to new crystalline molecular sieve SSZ-75 prepared using a tetramethylene-1,4-bis-(N-methylpyrrolidinium) dication as a structure-directing agent, and its use in catalysts for hydrocarbon conversion reactions.
Type:
Grant
Filed:
January 14, 2010
Date of Patent:
March 15, 2011
Assignee:
Chevron U.S.A. Inc.
Inventors:
Stacey Zones, Allen Burton, Theodorus Ludovicus Michael Maesen, Berend Smit, Edith Beerdsen
Abstract: The present invention is directed to a method for making new crystalline molecular sieve designated SSZ-79 using 1,8-dimethyl-1,4,8,11-tetraazacyclotetradecane or 1,4,8,11-tetramethyl-1,4,8,11-tetraazacyclotetradecane as a structure directing agent.
Abstract: The present invention is directed to a new crystalline molecular sieve designated SSZ-79 synthesized using 1,8-dimethyl-1,4,8,11-tetraazacyclotetradecane or 1,4,8,11-tetramethyl-1,4,8,11-tetraazacyclotetradecane as a structure directing agent.
Abstract: The present invention relates to a method for oxidizing CO, comprising: passing a first feed comprising CO and a second feed comprising oxygen, in an oxidation zone, over a catalyst comprising highly dispersed gold on sulfated zirconia, at oxidation conditions, to produce an effluent comprising a lower level of CO than in the first feed.
Abstract: 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.
Abstract: 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.
Abstract: The present invention is directed to a process for preparing zeolites belonging to the SSZ-26/33 family of zeolites using novel nitrogen-based structure directing agents. The process for preparing the SSZ-26/33 family of zeolites involves using a structure directing agent selected from the group consisting of 1,5-bis(N,N-dimethylcyclohexylammonium)pentane dications, 1,4-bis(N-cyclohexylpiperidinium)butane dications and 1,4-bis(N-cyclopentylpiperidinium)butane dications.
Abstract: The present invention is directed to a process for producing crystalline zeolites from a reaction mixture containing an N,N,N-trialkyl benzyl quaternary ammonium cation as a structure directing agent.
Abstract: 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 methods for synthesizing SSZ-74.
Type:
Grant
Filed:
December 21, 2006
Date of Patent:
March 31, 2009
Assignee:
Chevron U.S.A. Inc.
Inventors:
Stacey I. Zones, Allen W. Burton, Jr., Kenneth Ong
Abstract: The present invention relates to novel battery having a first electrode comprising an electrode active material represented by the general formula AaMb(XY4)2Zd, a second electrode which is a counter-electrode to the first electrode; and an electrolyte.
Type:
Grant
Filed:
September 9, 2005
Date of Patent:
September 18, 2007
Assignee:
Valence Technology, Inc.
Inventors:
Jeremy Barker, M. Yazid Saidi, Jeffrey Swoyer