Hydrocarbon hydrocracking process

Claim 1

A process for hydrocracking hydrocarbon feedstocks to lower boiling components which comprises: (a) combining said hydrocarbon feedstock and hydrogen containing gas with hot solid zeolitic active catalyst particles, the weight ratio of catalyst to oil being within the range between 1 and 15, with hydrogen pressure being maintained within the range between 200 psig and 2000 psig, to form a suspension; (b) passing said suspension through a riser reaction zone at a temperature between about 600° F. and less than 1000° F. to catalytically crack said feedstock while avoiding thermal conversion of said feedstock and providing a hydrocarbon residence time between about 1 second and 10 minutes; (c) separating and recovering said lower boiling components and said solid catalyst particles; (d) regenerating at least a portion of the separated solid catalyst particles with a water-free oxygen-containing gas in a fluidized bed operated at conditions to produce regenerated catalyst and gaseous products consisting essentially of carbon monoxide and carbon dioxide; and (e) returning at least a portion of the regenerated catalyst combined with the hydrocarbon feedstock and hydrogen.