Distillation: apparatus – Apparatus – Systems
Patent
1981-04-27
1983-03-01
Bascomb, Jr., Wilbur L.
Distillation: apparatus
Apparatus
Systems
202172, 202173, 202180, 202235, 196 1452, 196134, 203 26, 203 43, 203 49, 203 73, 203 88, 203DIG20, 203DIG25, 208321, 208339, 208352, 208353, 210511, 422260, 422290, 422291, B01D 306, B01D 1104
Patent
active
043753876
ABSTRACT:
Process and apparatus for extracting an organic liquid from an organic liquid solute/solvent mixture. The mixture is contacted with a fluid extractant which is at a temperature and pressure to render the extractant a solvent for the solute but not for the solvent. The resulting fluid extract of the solute is then depressurized to give a still feed which is distilled to form still overhead vapors and liquid still bottoms. The enthalpy required to effect this distillation is provided by compressing the still overhead vapors to heat them and indirectly to heat the still feed. The process is particularly suitable for separating mixtures which form azeotropes, e.g., oxygenated hydrocarbon/water mixtures. The energy required in this process is much less than that required to separate such mixtures by conventional distillation techniques.
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deFilippi Richard P.
Vivian J. Edward
Bascomb, Jr. Wilbur L.
Critical Fluid Systems, Inc.
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