Premium synthetic lubricant base stock having at least 95% non-c

Details Premium synthetic lubricant base stock having at least 95% non-c Premium synthetic lubricant base stock having at least 95% non-c

1998-09-04

2000-06-27

Knode, Marian C.

Mineral oils: processes and products

Products and compositions

Lubricating oils

208 19, 585 1, C10G 7100, C07C 720

Patent

active

060803010

ABSTRACT:
A premium synthetic lubricating oil base stock having a high VI and low pour point is made by hydroisomerizing a Fischer-Tropsch synthesized waxy, paraffinic feed wax and then dewaxing the hydroisomerate to form a 650-750.degree. F.+ dewaxate. The waxy feed has an initial boiling point in the range of about 650-750.degree. F., from which it continuously boils up to at least 1050.degree. F. and has a T.sub.90 -T.sub.10 temperature difference of at least 350.degree. F. The feed is preferably hydroisomerized without any pretreatment, other than optional fractionation. The 650-750.degree. F.+ dewaxate is fractionated into two or more base stocks of different viscosity.

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