Solvent dewaxing of lubricating oils

Details Solvent dewaxing of lubricating oils Solvent dewaxing of lubricating oils

1990-05-23

1991-04-09

McFarlane, Anthony

Mineral oils: processes and products

Paraffin wax; treatment or recovery

Separation of paraffin from oil

208 28, 208187, 208188, 208311, 208321, 208 37, 208 18, C10G 7100, C10G 7306

Patent

active

050062220

ABSTRACT:
An improvement has been discovered in a process for solvent dewaxing a hydrocarbon lubricating oil stock. Solvent dewaxed oils are steam stripped and then vacuum dehydrated at 2.5 psia at the steam stripping temperature of 350.degree. F. to 450.degree. F. Nitrogen or natural gas having a dew point of -100.degree. F. or lower is contacted with the oil at 0.5 to 1 SCF/bbl. A solvent free lubricating oil is produced which is water haze free in cold storage.

REFERENCES:
patent: 3001604 (1961-09-01), Worley
patent: 3096380 (1963-07-01), Bolen
patent: 4180457 (1979-12-01), Popp et al.

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