Polyvinylpyrrolidone dewaxing aid for bright stocks

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

1978-12-22

1980-05-20

Levine, Herbert

Mineral oils: processes and products

Paraffin wax; treatment or recovery

Separation of paraffin from oil

208 38, C10G 4306, C10G 4308

Patent

active

042038243

ABSTRACT:
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.

REFERENCES:
patent: 3239445 (1966-03-01), Leonard et al.

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