Patent ID: 6709571
Filing Date: 2004-03-23
Classification: C10G

Abstract:
A hydrocracking process for converting a heavy hydrocarbon feed to a lighter fraction having a 300Â° F. end point, the process comprising:feeding a heavy hydrocarbon feed and hydrogen in a fixed catalyst bed comprising a hydrocracking catalyst comprising a large pore zeolite catalyst loaded with a metal selected from the group consisting of noble metals and transition metals, said heavy hydrocarbon feed having a boiling point range from about 200Â° F. to about 900Â° F. and comprising at least 13 percent by weight hydrogen, less than 2 percent by weight heteroatoms, and less than 40 percent by weight aromatics; hydrocracking said heavy hydrocarbon feed at a hydrogen partial pressure of from about 300 to about 540 psig to convert the heavy hydrocarbon feed to a lighter fraction having a boiling end point of less than about 300Â° F. and a heavy fraction; separating said lighter fraction from said heavy fraction; recovering said lighter fraction as product; and recycling said heavy fraction to said fixed catalyst bed to substantially convert all of said heavy fraction to a lighter fraction having a boiling end point of less than about 300Â° F.; wherein said hydrocracking catalyst stabilizes to an aging rate of less than about 0.6Â° F. per day after 30 days on stream.