Polyvinylpyrrolidone dewaxing aid for bright stocks

Details Polyvinylpyrrolidone dewaxing aid for bright stocks Polyvinylpyrrolidone dewaxing aid for bright stocks

C - Chemistry, Metallurgy

10

G

196/257

C10G 73/12 (2006.01) C10G 73/04 (2006.01)

Patent

CA 1143317

(U.S. 972,230) ABSTRACT OF THE DISCLOSURE Polyvinylpyrrolidone having a number average molecular weight ranging from about 150,000 to 400,000 has been found to be an effective dewaxing aid for bright stock in ketone dewaxing processes. Using as little as 100 ppm based on the waxy oil can result in almost a 50% increase in the filter rate of the dewaxed oils from the wax.

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