Recovery of organic solvents from liquid mixtures

Details Recovery of organic solvents from liquid mixtures Recovery of organic solvents from liquid mixtures

1982-04-05

1985-04-02

Sever, Frank

Distillation: processes, separatory

Plural distillations performed on same material

One a distillation under positive pressure or vacuum

203 85, 203 95, 208356, 208361, 208367, 585835, B01D 338

Patent

active

045085978

ABSTRACT:
A method of recovering light organic solvent from a liquid mixture containing the solvent and a product material, such as asphaltenes or coal liquefaction products. The solvent-product material mixture is treated to separate a first vapor phase rich in solvent and a first liquid phase rich in product material. The first liquid phase is then intimately contacted with steam, under shearing conditions, in a static or dynamic mixer. The steam-liquid phase mixture is then treated to separate a second vapor phase, rich in steam and solvent, and a second liquid phase, rich in product material and substantially depleted of solvent. Solvent is recovered from the first and second vapor phases.

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Description in Prior Art Statement of Steam Stripping Conducted in Multi-Tray Vessel.

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