Combination extraction-dewaxing of waxy petroleum oils

Details Combination extraction-dewaxing of waxy petroleum oils Combination extraction-dewaxing of waxy petroleum oils

1976-06-17

1978-03-28

Levine, Herbert

Mineral oils: processes and products

Paraffin wax; treatment or recovery

Separation of paraffin from oil

208 33, C10G 4308

Patent

active

040813525

ABSTRACT:
Waxy oils are solvent refined in a relatively low temperature, combination extraction-dewaxing process wherein the waxy oil is simultaneously extracted and at least partially dewaxed in a dilution chilling zone, sequentially followed by a second extraction and a second dewaxing to produce wax and useful lube oils, and wherein solvent does not have to be removed from the oil as it passes from step to step of the process. Further, if the second dewaxing is performed in a dilution chilling zone, then scraped-surface chillers are not required prior to filtering the wax from the oil.

REFERENCES:
patent: 3972802 (1976-08-01), Bushnell

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