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US 6,620,313 B1Granted
Hydroconversion process using bulk group VIII/Group VIB catalysts
AssigneeExxonMobil Research and Engineering Company
InventorsRichard Alan Demmin, Kenneth Lloyd Riley, Stuart Leon Soled, Sabato Miseo
Life of this patent
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Abstract
Hydroconversion process of petroleum and chemical feedstocks using bulk Group VIII/Group VIB catalysts. Preferred catalysts include those comprised of Ni—Mo—W.
Claims29
A process for selectively hydroconverting a raffinate produced from solvent refining a lubricating oil feedstock which comprises:
- (a) conducting the lubricating oil feedstock to a solvent extraction zone and separating therefrom an aromatics rich extract and a paraffins rich raffinate;
- (b) stripping the raffinate of solvent to produce a raffinate feed having a dewaxed oil viscosity index from about 80 to about 105 and a final boiling point of no greater than about 650° C.;
- (c) passing the raffinate feed to a first hydroconversion zone and processing the raffinate feed in the presence of a bulk metal catalyst under hydroconversion conditions wherein the bulk metal catalyst comprises a non-noble metal Group VIII molybdate in which at least a portion but less than all of the molybdenum is replaced by tungsten to produce a first hydroconverted raffinate;
- and
- (d) passing the first hydroconverted raffinate to a second reaction zone and conducting cold hydrofinishing of the first hydroconverted raffinate in the presence of a hydrofinishing catalyst under cold hydrofinishing conditions wherein the bulk metal catalyst is represented by the formula:
- (X)b(Mo)c(W)dOz
- wherein X is a non-noble Group VIII metal, the molar ratio of b:
- (c+d) is 0.5/1 to 3/1, the molar ratio of c:d is >0.01/1, and z=[2b+6(c+d)]/2.
5 more elements
A process for selectively hydroconverting a raffinate produced from solvent refining a lubricating oil feedstock which comprises:
- (a) conducting the lubricating oil feedstock to a solvent extraction zone and separating therefrom an aromatics rich extract and a paraffins rich raffinate;
- (b) stripping the raffinate of solvent to produce a raffinate feed having a dewaxed oil viscosity index from about 80 to about 105 and a final boiling point of no greater than about 650° C.;
- (c) passing the raffinate feed to a first hydroconversion zone and processing the raffinate feed in the presence of a bulk metal catalyst under hydroconversion conditions wherein the bulk metal catalyst comprises a non-noble metal Group VIII molybdate in which at least a portion but less than all of the molybdenum is replaced by tungsten to produce a first hydroconverted raffinate;
- (d) passing the hydroconverted raffinate from the first hydroconversion zone to a second hydroconversion zone and processing the hydroconverted raffinate in the presence of a hydroconversion catalyst under hydroconversion conditions to produce a second hydroconverted raffinate;
- (e) passing the second hydroconverted raffinate to a hydrofinishing reaction zone and conducting cold hydrofinishing of the second hydroconverted raffinate in the presence of a hydrofinishing catalyst under cold hydrofinishing conditions wherein the bulk metal catalyst is represented by the formula:
- (X)b(Mo)c(W)dOz
- wherein X is a non-noble Group VIII metal, the molar ratio of b:
- (c+d) is 0.5/1 to 3/1, the molar ratio of c:d is >0.01/1, and z=[2b+6(c+d)]/2.
5 more elements
A process for selectively hydroconverting a raffinate produced from solvent refining a lubricating oil feedstock which comprises:
- (a) conducting the lubricating oil feedstock to a solvent extraction zone and separating therefrom an aromatics rich extract and a paraffins rich raffinate;
- (b) stripping the raffinate of solvent to produce a raffinate feed having a dewaxed oil viscosity index from about 80 to about 105 and a final boiling point of no greater than about 650° C.;
- (c) passing the raffinate feed to a first hydroconversion zone and processing the raffinate feed in the presence of a hydroconversion catalyst under hydroconversion conditions to produce a first hydroconverted raffinate;
- (d) passing the hydroconverted raffinate from the first hydroconversion zone to a second hydroconversion zone and processing the hydroconverted raffinate in the presence of a bulk metal catalyst under hydroconversion conditions wherein the bulk metal catalyst comprises a non-noble metal Group VIII molybdate in which at least a portion but less than all of the molybdenum is replaced by tungsten to produce a second hydroconverted raffinate;
- (e) passing the second hydroconverted raffinate to a hydrofinishing reaction zone and conducting cold hydrofinishing of the second hydroconverted raffinate in the presence of a hydrofinishing catalyst under cold hydrofinishing conditions wherein the bulk metal catalyst is represented by the formula:
- (X)b(Mo)c(W)dOz
- wherein X is a non-noble Group VIII metal, the molar ratio of b:
- (c+d) is 0.5/1 to 3/1, the molar ratio of c:d is >0.01/1, and z=[2b+6(c+d)]/2.
5 more elements
Dependencies are inferred from the claim text.