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U.S. Department of Energy
Office of Scientific and Technical Information

Two-stage catalytic process to produce lubricating oils

Patent ·
OSTI ID:6784822
A high viscosity index mineral lubricating oil is produced by processing a heavy hydrocarbon feedstock, e.g., a deasphalted residiuum in two (2) catalytic steps. The feedstock is first catalytically hydrocracked, hydrotreated then catalytically hydrogenated and can be fractionated and dewaxed to provide a finished product. Improved step (1) catalysts comprise at least one group vib metal, group viii metal and mixtures thereof on a support involving both silica-alumina and alumina.
Assignee:
Atlantic Richfield Co
Patent Number(s):
US 4238316
OSTI ID:
6784822
Country of Publication:
United States
Language:
English