Login| Sign Up| Help| Contact|

Patent Searching and Data

Document Type and Number:
Japanese Patent JPS5420201
Kind Code:
Screened and drained used lubricating oil stock is predistilled in a steam stripping still for about 4 hours or more. The thus predistilled used oil then flows to an evaporator for a vacuum distillation at a temperature below the cracking temperature of the stock, about 480 DEG -650 DEG F., to effect an evaporation of the used lubricating oil and its separation from a concentrate by-product of heavy lube hydrocarbons and additives.

Application Number:
Publication Date:
July 20, 1979
Filing Date:
September 01, 1976
Export Citation:
Click for automatic bibliography generation   Help
International Classes:
C10G7/06; C10G53/02; C10G53/12; C10M175/00; F16N39/00

Previous Patent: JPS5420200

Next Patent: JPS5420202