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

041152450

ABSTRACT:
A solvent dewaxing process wherein an intermediate range waxy distillate oil, heated for dissolving all wax therein, is mixed with about 1-4 volumes dewaxing solvent having a temperature in the range of 60.degree.-80.degree. F for forming an oil-solvent mixture having a temperature below depressed cloud point. The oil-solvent mixture is subsequently cooled at 1.degree.-8.degree. F/min to a selected separation temperature for precipitating wax and forming a first wax/oil/solvent mixture. Additional solvent, at about the separation temperature, is mixed with first wax/oil/solvent mixture in an amount equivalent to about 1-2 volumes of waxy oil charge for precipitating additional wax and forming a second wax/oil/sovent mixture. Precipitated wax is separated, at said separation temperature from said second wax/oil/solvent mixture.

REFERENCES:
patent: 2410483 (1946-11-01), Dons et al.
patent: 3720599 (1973-03-01), Gould
patent: 3764517 (1973-10-01), Bodemuller
Chen et al., "Chemical Engineering", Mar. 19, 1973, pp. 105 to 111.

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