Hydrorefining process for production of base oils
AssigneeStar Enterprise
InventorsJohn Robert Powers, Gerald Foley Prescott, James Roger Whiteman
Life of this patent
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Abstract
A process for saturating aromatics in a lube range hydrocarbon is disclosed. The process can be used to raise the viscosity index of the lube range products. The process is carried out over a noble metal catalyst under mild process conditions. The catalyst is resistant to sulfur and nitrogen compounds.
Claims32
A process comprising contacting a dewaxed aromatics saturation reactor feed having a combined sulfur and nitrogen content of about 5 ppm and a boiling range within the range of 500.degree. F. to 1100.degree. F. and a viscosity in the range of about 50 SUS to about 600 SUS and an aromatics content in the range of about 20% to about 35% by volume with an aromatics saturation catalyst comprising noble metals on an inorganic oxide support at a temperature in the range of about 350.degree. F. to about 700.degree. F. and hydrogen at a partial pressure in the range of about 150 psig to 3500 psig to produce a dewaxed, dearomatized oil product having a significantly lower aromatics content than the dewaxed aromatics saturation reactor feed.
A process comprising conducting hydrodesulfurization/hydrodenitrogenation on a dewaxed hydrodesulfurization/hydrodenitrogenation feed to form a dewaxed aromatics saturation reactor feed having a combined sulfur and nitrogen content of about 5 ppm and a boiling range within the range of 500.degree. F. to 1100.degree. F. and a viscosity in the range of about 50 SUS to about 600 SUS at 100.degree. F.;
- and contacting the dewaxed aromatics saturation reactor feed with an aromatics saturation catalyst comprising noble metals on an inorganic oxide support at a temperature in the range of about 350.degree. F. to about 700.degree. F. and hydrogen at a partial pressure in the range of about 150 psig to 3500 psig to produce a dewaxed, dearomatized oil product having a significantly lower aromatics content than the dewaxed aromatics saturation reactor feed.
A process comprising catalytically dewaxing a catalytic dewaxer feed at a temperature in the range of from about 500.degree. F. to about 800.degree. F. and at a pressure in the range of from about 200 to about 5,000 psig to form a dewaxed aromatics saturation reactor feed, said dewaxed aromatics saturation reactor feed having a combined sulfur and nitrogen content of about 5 ppm and a boiling range within the range of 500.degree. F. to 1100.degree. F. and a viscosity in the range of about 50 SUS to about 600 SUS at 100.degree. F.;
- and contacting the dewaxed aromatics saturation reactor feed with an aromatics saturation catalyst comprising noble metals on an inorganic oxide support at a temperature in the range of about 350.degree. F. to about 700.degree. F. and hydrogen at a partial pressure in the range of about 150 psig to 3500 psig to produce a dewaxed, dearomatized oil product, wherein the dewaxed aromatics saturation reactor feed has an aromatics content in the range of about 20% to about 35% by volume and the dewaxed, dearomatized oil product has a significantly lower aromatics content than the dewaxed aromatics saturation reactor feed.
A process comprising catalytically dewaxing a catalytic dewaxer feed in the presence of a catalytic dewaxing catalyst at a temperature in the range of from about 500.degree. F. to about 800.degree. F. and at a pressure in the range of from about 200 to about 5,000 psig to form a dewaxed aromatics saturation reactor feed having a combined sulfur and nitrogen content of about 5 ppm and a boiling range within the range of 500.degree. F. to 1100.degree. F. and a viscosity in the range of about 50 SUS to about 600 SUS at 100.degree. F.;
- and contacting the dewaxed aromatics saturation reactor feed with an aromatics saturation catalyst comprising noble metals on an inorganic oxide support at a temperature in the range of about 350.degree. F. to about 700.degree. F. and hydrogen at a partial pressure in the range of about 150 psig to 3500 psig to produce a dearomatized oil product having a significantly lower aromatics content than the dewaxed aromatics saturation reactor feed, wherein the catalytic dewaxing catalyst comprises a zeolite-containing support having deposited thereon a catalytic agent selected from the group consisting of nickel, nickel/tungsten, platinum and palladium and the catalytic dewaxing is conducted at an LHSV in the range of from about 0.5 v.sub.o /Hr/v.sub.c to about 2 v.sub.o /Hr/v.sub.c and from about 3,000 scf to about 8,000 scf of hydrogen are contacted with the catalytic dewaxing catalyst with each barrel of the catalytic dewaxer feed.
A process comprising solvent dewaxing a solvent dewaxer feed using a wax-selective solvent to form a dewaxed aromatics saturation reactor feed having a combined sulfur and nitrogen content of about 5 ppm and a boiling range within the range of 500.degree. F. to 1100.degree. F. and a viscosity in the range of about 50 SUS to about 600 SUS at 100.degree. F.;
- and contacting the dewaxed aromatics saturation reactor feed with an aromatics saturation catalyst comprising noble metals on an inorganic oxide support, at a temperature in the range of about 350.degree. F. to about 700.degree. F., and hydrogen at a partial pressure in the range of about 150 psig to 3500 psig to produce a dewaxed, dearomatized oil product having a significantly lower aromatics content than the dewaxed aromatics saturation reactor feed.
Dependencies are inferred from the claim text.