Mineral oils: processes and products – Paraffin wax; treatment or recovery – Separation of paraffin from oil
Patent
1977-07-05
1978-09-19
Levine, Herbert
Mineral oils: processes and products
Paraffin wax; treatment or recovery
Separation of paraffin from oil
208 38, C10G 4308
Patent
active
041152417
ABSTRACT:
A solvent dewaxing process wherein a waxy oil charge, heated for melting wax therein, is cooled to a temperature about 5.degree.-15.degree. F below the cloud point, wherein the cooled waxy oil charge is mixed under conditions of good mixing with solvent having a temperature 20.degree.-40.degree. F above a selected separation temperature in a solvent to oil ratio of about 1:1 to 5:1 for precipitating wax from the resulting mixture, and wherein the wax/oil/solvent mixture is further cooled in a second cooling zone at a rate of ca. 1.degree.-8.degree. F./min to said selected separation temperature for precipitating additional wax. Precipitated wax is separated from the mixture at the separation temperature, producing a wax free solvent-oil solution. Dewaxed oil is recovered by fractionation from the wax free solvent-oil solution.
REFERENCES:
patent: 2410483 (1946-11-01), Dons et al.
patent: 3350297 (1967-10-01), Torobin
patent: 3720599 (1973-03-01), Gould
patent: 3764517 (1973-10-01), Bodemuller
patent: 4013542 (1977-03-01), Gudelis et al.
Chen et al., "Chemical Engineering", Mar. 19, 1973, pp. 105 to 111.
Bozeman, Jr., deceased Paul P.
Harrison Charles W.
Levine Herbert
May, Jr. Douglas H.
Ries Carl G.
Texaco Inc.
Whaley Thomas H.
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