Crystalline chromosilicates and process uses

Patent · Tue Dec 14 04:00:00 EST 1982

OSTI ID:6582919

Klotz, M R

There are provided crystalline chromosilicates, their methods of preparation, and process uses. A first crystalline chromosilicate comprises a molecular sieve material providing a specific x-ray diffraction pattern and having the following composition in terms of mole ratios of oxides: 9 + or - 0.2 (Wr/sub 2/O+(1-W)M/sub 2/NO):Cr/sub 2/O/sub 3/:YSIO/sub 2/:ZH/sub 2/ wherein R is an alkyl ammonium cation, M is at least one cation having a valence of n, Y is a value within the range of about 4 to about 500, Z is a value within the range of about 0 to about 160, and W is a value that is greater than or equal to 0 and L than or equal to 1. A second crystalline chromosilicate comprises a molecular sieve material providing a specific x-ray diffraction pattern and having the following composition in terms of mole ratios of oxides: 9 + or - 0.2M/sub 2//NO:Cr/sub 2/O/sub 3/:YSIO/sub 2/:ZH/sub 2/ wherein M is at least one cation having a valence of n, Y is within the range of about 4 to about 500, and Z is within the range of about 0 to about 160. The first crystalline chromosilicate is a precursor of the second. There is provided also a process for the conversion of a hydrocarbon stream, which process comprises contacting said stream under hydrocarbon conversion conditions with a catalyst comprising the second crystalline chromosilicate. In addtion, there is provided a process for the isomerization of a xylene feed, which process comprises contacting said feed under isomerization conditions with a catalyst comprising the second crystalline chromosilicate.

• Assignee: Standard Oil Co (Indiana)
• Patent Number(s): US 4363718
• OSTI ID: 6582919
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020400* -- Petroleum-- Processing
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
ADSORBENTS
ADSORPTION
CATALYSTS
CHEMICAL PREPARATION
CHEMICAL REACTIONS
CHROMIUM COMPOUNDS
CHROMIUM SILICATES
COHERENT SCATTERING
CONVERSION
CRYSTAL STRUCTURE
DIFFRACTION
HYDROCARBONS
ISOMERIZATION
MOLECULAR SIEVES
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
SCATTERING
SILICATES
SILICON COMPOUNDS
SORPTION
SYNTHESIS
TRANSITION ELEMENT COMPOUNDS
USES
X-RAY DIFFRACTION