Mineral oils: processes and products – Paraffin wax; treatment or recovery – Chemical treatment
Patent
1998-09-04
2000-08-15
Myers, Helane E.
Mineral oils: processes and products
Paraffin wax; treatment or recovery
Chemical treatment
585734, 585739, 585737, 208950, 208112, 208 58, 208130, 208143, 518700, C10G 2500
Patent
active
061030996
ABSTRACT:
A lubricating base stock useful for forming lubricants such as a multigrade automotive oils, automatic transmission oils, greases and the like is prepared by hydroisomerizing a waxy hydrocarbon feed fraction having an initial boiling point in the 650-750.degree. F. range and an end point of at least 1050.degree. F., synthesized by a slurry Fischer-Tropsch hydrocarbon synthesis process. The hydroisomerization forms a hydroisomerate containing the desired base stock which is recovered, without dewaxing the hydroisomerate. The hydroisomerization is conducted at conditions effective to convert at least 67 wt. % of the 650-750.degree. F.+ waxy feed hydrocarbons to lower boiling hydrocarbons. When combined with a standard lubricant additive package, these base stocks have been formed into multigrade automotive crankcase oils, transmission oils and hydraulic oils meeting the specifications for these oils.
REFERENCES:
patent: 5362378 (1994-11-01), Borghard et al.
patent: 5866748 (1999-02-01), Wittenbrink et al.
Boate Douglas R.
Ryan Daniel F.
Wittenbrink Robert J.
Exxon Research and Engineering Company
Myers Helane E.
Simon Jay
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