Hydrocarbon conversion catalyst and process for preparing same

Claim 2

A hydrocarbon conversion catalyst consisting essentially of 3 to 40 weight percent of a crystalline aluminosilicate zeolite and 60 to 97 weight percent of an alumina-magnesia matrix having a magnesia content of 2 to 50 weight percent, wherein the crystalline aluminosilicate zeolite is supported on the alumina-magnesia matrix.

Claim 3

The catalyst of claim 1, wherein the content of said crystalline aluminosilicate zeolite in said catalyst is in the range of 5 to 30 weight percent, and the content of said alumina-magnesia matrix in said catalyst is in the range of 70 to 95 weight percent.

Claim 4

The catalyst of claim 1, wherein the content of magnesia in said alumina-magnesia matrix is in the range of 4 to 30 weight percent.

Claim 5

A process for preparing a hydrocarbon conversion catalyst comprising 3 to 40 weight percent of zeolite and 60 to 97 weight percent of alumina-magnesia matrix, which process comprises adding an alkali to a mixture of an alumina hydrate and a magnesia hydrate to adjust the pH of said mixture into a weak alkaline side of pH 9 to 12, ageing said mixture with stirring at a temperature of 50° to 100° C. to form an alumina-magnesia hydrogel slurry, then mixing said hydrogel slurry with a crystalline aluminosilicate zeolite slurry and thereafter drying the resultant mixture.

Claim 6

A process for preparing a hydrocarbon conversion catalyst comprising 3 to 40 weight percent of zeolite and 60 to 97 weight percent of alumina-magnesia matrix, which process comprises adding an alkali to a mixture of an alumina hydrate and a magnesia hydrate to adjust the pH of said mixture into a weak alkaline side of pH 9 to 12, ageing said mixture with stirring at a temperature of 50° to 100° C. to form an alumina-magnesia hydrogel slurry, then mixing said hydrogel slurry with a crystalline aluminosilicate zeolite slurry and thereafter drying the resultant mixture.

Claim 7

A process for preparing a hydrocarbon conversion catalyst comprising 3 to 40 weight percent of a crystalline aluminosilicate zeolite and 60 to 97 weight percent of an alumina-magnesia matrix, characterized in that a basic compound is adsorbed on said zeolite before mixing said zeolite with said alumina-magnesia matrix.

Claim 8

A process for preparing a hydrocarbon conversion catalyst comprising 3 to 40 weight percent of a crystalline aluminosilicate zeolite and 60 to 97 weight percent of an alumina-magnesia matrix, characterized in that a basic compound is adsorbed on said zeolite before mixing said zeolite with said alumina-magnesia matrix.