Claims
- 1. A process for demetalizing and desulfurizing a residual oil which comprises:
- (a) mixing said residual oil with an aromatic solvent;
- (b) passing the resulting mixture of residual oil and solvent together with hydrogen in contact with a catalyst prepared by
- (i) calcining an alpha alumina monohydrate or pseudo boehmite at a temperature of about 1400.degree. F.,
- (ii) mixing the resultant calcined product with between about 25 to about 185 percent of its own weight with uncalcined alumina monohydrate or pseudo boehmite; and
- (iii) calcining the resultant mixture at a temperature of about 1400.degree. F.; and
- (iv) recovering a mixture of aluminas having two concentrations of pore sizes, one concentrated in the range of diameters of between about 90 and about 200 Angstrom units and having also a pore volume of between about 0.35 and about 0.7 cc per gram of alumina and a second having pore diameters between about 1000 and about 5000 Angstrom and a pore volume of about 0.2 cc per gram of alumina;
- (c) recovering from the resulting product stream a residual oil having a substantially reduced sulfur and metals content obtained using substantially reduced amounts of hydrogen compared to known processes.
- 2. The process of claim 1 wherein said solvent is selected from the group consisting of benzene, toluene, xylene and light cycle oil reformates.
- 3. The process of claim 1 wherein the step of passing (b) is conducted at a temperature between about 300.degree. C. and about 425.degree. C.
- 4. The process of claim 1 wherein the step of passing (b) is conducted at an LHSV between about 0.1 and about 5.
- 5. The process of claim 1 wherein said step of passing in (b) is conducted at a hydrogen pressure of between about 300 and about 3000 psig.
- 6. The process of claim 1 wherein the volumetric ratio of aromatic solvent to residual oil is between 0.5 and 10.
- 7. The process of claim 1 wherein said process is conducted as a batch process.
- 8. The process of claim 1 wherein the period of contact time is between about one-half and about 4 hours.
- 9. The process of claim 1 wherein the uncalcined monohydrate or pseudo boehmite of step (ii) is present in the mixture before final calcination in a concentration of between about 65 and about 20 percent by weight.
- 10. The process of claim 1 wherein the resultant calcined alumina of (i) is present in the mixture of (ii) in a concentration of between about 35 and about 80 percent by weight.
- 11. The process of claim 1 wherein the uncalcined alumina of (ii) is present in the mixture of ii in a concentration of about 35 percent by weight.
- 12. The process of claim 1 wherein the resultant calcined alumina (ii) is present in the mixture of (ii) in a concentration of about 65 percent by weight.
Parent Case Info
This is a continuation of copending application Ser. No. 490,076, filed on Apr. 29, 1983 now abandoned.
US Referenced Citations (17)
Continuations (1)
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Number |
Date |
Country |
Parent |
490076 |
Apr 1983 |
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