Patent ID: 6174430
Filing Date: 2001-01-16
Classification: B01J,C10G

Abstract:
A process for hydrocracking hydrocarbon streams comprising contacting the streams in the presence of hydrogen with a hydrocracking catalyst comprising:a) from about 70 to about 90 weight percent of a Y zeolite, based on the catalyst having a sillica to alumina mole ratio of from about 4.8 to less than 6.0, a unit cell constant within the range of about 24.50 to about 24.57, a Na.sub.2 O level of less than or equal to about 0.25 weight percent;b) from about 10 to about 30 weight percent, based on the catalyst of an alumina having a pore volume (by mercury intrusion method) within the range of about 0.55 to about 0.85 cc/g; andc) from about 0.5 to 0.9weight percent, based on the catalyst of a noble metal; wherein said hydrocracking catalyst have a dispersivity of the noble metal of equal or greater than about 50% by hydrogen chemisorption measurement, a surface area of greater than or equal to 700 m.sup.2 /g by BET measurement, a compacted bulk density with the range of from 0.40 to 0.58 g/cc, and a pore volume (by mercury intrusion method) within the range of from about 0.4 to about 0.7 ml/g, at a temperature within the range of about 100.degree. C. to about 500.degree. C.