Solvent dewaxing process

Details Solvent dewaxing process Solvent dewaxing process

1977-07-05

1978-05-09

Levine, Herbert

Mineral oils: processes and products

Paraffin wax; treatment or recovery

Separation of paraffin from oil

208 37, C10G 4308

Patent

active

040885658

ABSTRACT:
A process for dewaxing waxy petroleum distillate oil stock wherein one volume waxy oil stock is mixed with about 0.5-2 volumes aromatic hydrocarbon dewaxing solvent, and the oil/aromatic solvent mixture heated to a temperature for dissolving all solid wax therein, wherein the oil/aromatic solvent mixture is cooled at a rate of about 1.degree.-8.degree. F./min. to a selected separation temperature for precipitating wax crystals and forming a wax/oil/aromatic solvent mixture, wherein the wax/oil/aromatic solvent mixture is mixed with 0.5-2 volumes of ketone dewaxing solvent at said separation temperature for a residence time of about 15 seconds to two minutes for precipitating additional wax, and wherein solid wax and dewaxed oil are recovered as products of the process.

REFERENCES:
patent: 2698279 (1954-12-01), Mondria
patent: 3871991 (1975-03-01), Shaw

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