TRIMETALLIC REFORMING CATALYST PREPARATION PROCESS Russian patent published in 2007 - IPC B01J37/02 B01J37/08 B01J23/644 B01J23/656 

FIELD: petroleum processing catalysts.

SUBSTANCE: catalyst containing platinum, rhenium, antimony, and chlorine on alumina are prepared by impregnation of carrier with aqueous solution of compounds of indicated elements, antimony being deposited as first or second component. Once antimony or platinum-antimony combination, or rhenium-antimony combination deposited, catalyst is dried at 130°C and then calcined in air flow at 500°C. Reduction of catalyst is performed at 300-600°C and pressure 0.1-4.0 MPa for 4 to 49 h. After deposition of antimony or two elements (platinum-antimony or rhenium-antimony) and drying-calcination procedures, second and third or only third element are deposited followed by drying and calcination. Final reduction of catalyst is accomplished in pilot plant reactor within circulating hydrogen medium at pressure 0.3-4.0 MPa and temperature up to 600°C for a period of time 12 to 48 h.

EFFECT: enhanced aromatization and isomerization activities of catalyst and also its stability.

2 cl, 1 tbl, 8 ex