Distillation: processes – separatory – Vaporization zone under positive pressure or vacuum – Including the addition of water or steam
Patent
1982-09-27
1987-05-19
Bascomb, Wilbur
Distillation: processes, separatory
Vaporization zone under positive pressure or vacuum
Including the addition of water or steam
203 88, 203 97, 203 98, 203DIG25, 208349, 208358, 208361, 208363, 208367, 585800, B01D 306, B01D 338, C10G 700
Patent
active
046665625
ABSTRACT:
A method of recovering light organic solvent from a liquid mixture containing the solvent and a process material, such as asphaltenes or coal liquefaction products. The solvent-process material mixture is treated in a solvent separation zone to separate a first vapor phase rich in solvent and a first liquid phase rich in process material. At least a portion of the liquid in the solvent separation zone is transferred to a mixing zone, where the liquid is intimately contacted with steam, under shearing conditions. The steam-liquid phase mixture thus produced is returned to the solvent separation zone and treated to separate a second vapor phase, rich in steam and solvent, and a second liquid phase, rich in process material and substantially depleted of solvent. Solvent is recovered from the first and second vapor phases.
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Addison William G.
Bascomb Wilbur
Kerr-McGee Refining Corporation
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