Distillation: processes – separatory – With measuring – testing or inspecting – Of temperature or pressure
Patent
1978-04-14
1980-11-11
Bascomb, Jr., Wilbur L.
Distillation: processes, separatory
With measuring, testing or inspecting
Of temperature or pressure
203 22, 203 23, 203 25, 203 85, 203 96, 203 87, 202173, 202177, 202180, 202186, B01D 342, B01D 336
Patent
active
042331200
ABSTRACT:
An improved solvent recovery process comprising distilling soiled solvent in a main still and conducting hot solvent vapor through a heat exchanger associated with a tank in which an azeotropic mixture of water and soiled solvent is maintained, which mixture boils at a temperature lower than the boiling point of the solvent alone. A series of tanks feed soiled solvent to the azeotropic mixture tank and then to the main still, and heat exchangers fed by the vapor from the main still and the vapor from the azeotropic mixture tank pre-heat the soiled solvent. Automatic control of water injection into the azeotropic mixture tank in dependence upon the temperature of conductivity of the tank contents maintains the composition of the azeotropic mixture, the injected water being taken from separators which separate water from condensate of the main still and azeotropic mixture tank vapors.
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patent: 3968002 (1976-07-01), Standiford
Bascomb, Jr. Wilbur L.
John Gladstone & Company (Engineering) Limited
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