Patent ID: 7262147
Filing Date: 2007-08-28
Classification: B01J

Abstract:
1. A method for producing a dehydrocyclodimerization catalyst comprising an amorphous phosphorus-modified alumina hydrogel, the method comprising admixing an alumina hydrosol with a phosphorus-containing compound and a zeolite, commingling the phosphorus-modified admixture with a gelling agent which is hydrolyzable at an elevated temperature, dispersing the commingled admixture as droplets in a suspending medium under conditions effective to transform the droplets into hydrogel particles, aging the hydrogel particles in a suspending medium, washing the hydrogel particles with water, drying the hydrogel particles, calcining the hydrogel particles, depositing a gallium component on the hydrogel particles, treating the hydrogel particles containing the zeolite and the gallium component with a fluid comprising water and having a concentration of total nitrogen of less than 0.01 mass %, and drying the hydrogel particles containing the zeolite and the gallium component to obtain dehydrocyclodimerization catalyst.