Solvent dewaxing process

Details Solvent dewaxing process Solvent dewaxing process

1977-07-05

1978-09-19

Levine, Herbert

Mineral oils: processes and products

Paraffin wax; treatment or recovery

Separation of paraffin from oil

208 37, C10G 4308

Patent

active

041152441

ABSTRACT:
A process for dewaxing a waxy petroleum distillate charge stock, wherein a mixture of waxy oil and solvent, heated for dissolving all solid wax therein, is cooled to a first temperature about 40.degree.-50.degree. F (22.degree. to 28.degree. C) above a selected separation temperature, and is held at such first temperature for a period of 1-2 minutes for equilibrating wax crystallization, wherein said oil-solvent mixture, at said first temperature, is cooled to a second temperature about 15.degree.14 20.degree. F (8.degree.-11.degree. C) above said separation temperature and is held at said second temperature for 1-2 minutes for equilibration of wax crystallization, wherein said oil-solvent mixture, at said second temperature, is cooled to said separation temperature, and wherein solid wax is separated from oil-solvent mixture at said separation temperature.

REFERENCES:
patent: 3249526 (1966-05-01), Bodington
patent: 3850740 (1974-11-01), Gudelis et al.
Chen et al., "Chemical Engineering" Mar. 19, 1973, pp. 105 -111.

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