Silica-modified zeolite catalyst and conversion therewith
AssigneeMobil Oil Corporation
InventorPaul G. Rodewald
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Abstract
A catalyst is provided, which is especially applicable for the selective production of certain desired hydrocarbons, comprising a crystalline aluminosilicate zeolite having a silica to alumina ratio of at least about 12, a constraint index, as hereinafter defined, within the approximate range of 1 to 12 and having contained within the interior crystalline structure thereof added amorphous silica in an amount of at least about 0.1 and preferably between about 2 and about 10 weight percent. The invention described herein also encompasses synthesis of the specified catalyst and use of the same in selectively producing low molecular weight olefins and/or para-xylene from appropriate charge stocks.
Claims7
A process for producing a hydrocarbon mixture rich in C.sub.2 -C.sub.3 olefins which comprises contacting, under conversion conditions, a charge consisting essentially of one or more lower monohydric alcohols having up to four carbon atoms, the ethers derived therefrom or mixtures of said alcohols and ethers with a catalyst composition comprising a crystalline aluminosilicate zeolite having a silica to alumina ratio of at least about 12, a constraint index within the approximate range of 1 to 12 and containing interdispersed within the interior crystalline structure thereof added amorphous silica in an amount of at least about 0.1 weight percent.
Dependencies are inferred from the claim text.