Claims
- 1. A catalyst useful for mild hydrocracking of a hydrocarbon feedstock having a substantial proportion of components boiling below about 1000.degree. F. comprising about 2.0 to about 6.0 wt. % of an oxide of a Group VIII metal; about 12.0 to about 25.0 wt. % of an oxide of molybdenum and 0 to about 3.0 wt. % of an oxide of phosphorus all supported on a porous alumina support containing about 10.0 to about 25.0 wt. %, based on the weight of the support; of silica in such a manner that the molybdenum gradient of the catalyst has a value between about 1 and about 10 and wherein the catalyst is further characterized by having a total surface area of about 150 to about 250 m.sup.2 /g and a total pore volume of about 0.75 to about 0.92 cc/g with a pore diameter distribution such that pores having diameters of less than 100 .ANG. constitute about 20.0 to about 40.0%, pores having diameters of 100-160 .ANG. constitute 28.4 to 34.1%; pores having diameters less than 160 .ANG. constitute about 50.0 to about 70.0%, pores having diameters greater than 160 .ANG. constitute about 30.0 to about 50.0%, of the total pore volume of the said catalyst and macropores having diameters greater than 250 .ANG. constitute about 25.0 to about 40.0% of the total pore volume of said catalyst.
- 2. The catalyst of claim 1 wherein the said catalyst contains about 0.1 to about 2.0 wt. % of phosphorus oxide.
- 3. The catalyst of claim 1 wherein the said Group VIII metal is selected from the group consisting of nickel and cobalt.
- 4. The catalyst of claim 1 wherein the said Group VIII metal is nickel.
- 5. The catalyst of claim 1 wherein the said Group VIII metal is cobalt.
- 6. The catalyst of claim 1 wherein the said catalyst comprises about 2.5 to about 3.5 wt. % NiO and about 12.0 to about 18.0 wt. % MoO.sub.3 supported on the said porous alumina support containing about 16 to about 25.0 wt. % of silica based on the weight of the support.
- 7. The catalyst of claim 1 wherein the molybdenum gradient of the catalyst has a value between about 1 and about 10.
Parent Case Info
This is a division, of application Ser. No. 07/890,206, filed May 29, 1992, now U.S. Pat. No. 5,320,743.
US Referenced Citations (3)
Number |
Name |
Date |
Kind |
3755147 |
Michelson |
Aug 1973 |
|
4426279 |
Antos et al. |
Jan 1984 |
|
4463104 |
Antos et al. |
Jul 1984 |
|
Divisions (1)
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Number |
Date |
Country |
Parent |
890206 |
May 1992 |
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