Process for separating bituminous materials

Details Process for separating bituminous materials Process for separating bituminous materials

1980-06-30

1981-06-16

Hearn, Brian E.

Mineral oils: processes and products

Fractionation

Liquid extraction with solvents

208 45, 208309, B65D 8546

Patent

active

042736447

ABSTRACT:
A process for separating a solvent from a bituminous material by pressure reduction and steam stripping without carry-over of entrained bituminous material. A fluid-like phase comprising bituminous material and solvent is reduced in pressure by passage through a pressure reduction valve to vaporize a portion of the solvent. The reduction in pressure also results in dispersing a mist of fine bituminous material particles in the vaporized solvent. The stream of vaporized solvent, mist and fluid-like bituminous material then is introduced into a static mixer. The static mixer intimately mixes the mist with the fluid-like material and causes the mist to recombine with the fluid-like material from which it was formed. The resulting stream is introduced into a steam stripper to separate the solvent remaining in the bituminous material. The vaporized solvent and steam are withdrawn from the stripper substantially free of entrained bituminous material and condensed. The liquid stream is introduced into a solvent surge vessel having a water draw. The solvent then is recycled in the process.

REFERENCES:
patent: 2940920 (1960-06-01), Garwin
patent: 3403093 (1968-09-01), Mills
patent: 3830732 (1974-08-01), Gatsis
patent: 4017383 (1977-04-01), Beavon
patent: 4101415 (1978-07-01), Crowley
patent: 4125459 (1978-11-01), Garwin
patent: 4211633 (1980-07-01), Gleim

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