Liquid purification or separation – Processes – Ion exchange or selective sorption
Patent
1986-10-27
1988-06-28
Fisher, Richard V.
Liquid purification or separation
Processes
Ion exchange or selective sorption
134 11, 134 12, 203 41, 2101951, 210196, 2102571, 210266, 210689, 210774, 210799, 210805, 210806, B01D 1500, B08B 704
Patent
active
047537353
ABSTRACT:
A method, liquid and apparatus is disclosed that is capable of effectively removing contaminated liquids from nonabsorbent articles. Articles wet with such liquids are immersed in azeotropic mixtures. Liquid film is displaced by the azeotrope which, in turn, is purified through a still and recycled. Articles moved through a vapor phase are clean and dry. In a typical operation, articles to be cleansed and dried are introduced into the solvent then rinsed and then elevated into a vapor zone. Suitable heating coils maintain the desired temperatures in the various compartments. In the vapor zone, all liquid film is changed to vapor while the article temperature is raised above ambient to prevent moisture condensation on the surface of the article upon removal from the system. In the solvent treating or reprocessing compartment, solvent with any accumulated moisture contained is processed through a molecular sieve (solvent dessicant) and filtered and the solvent collected and recirculated. Solvent is continuously pumped and filtered to remove any particulate matter. The filtered product is then fed through a still and through a flow control valve and the solvent is distilled to separate all nonvolatile impurities. In a solvent desiccant section any residual moisture is removed before the solvent is filtered and is returned. Where the needs warrant, ultrasonic means may be employed as the desired agitation means in lieu of or in addition to the agitators and/or turbulence generated by the boiling action of the solvent.
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Simon, Cleaning System Tailored for Water-Extendables, Industrial Finishing, pp. 44-45, 12/84.
Allied-Signal Inc.
Fisher Richard V.
Friedenson Jay P.
Jones W. Gary
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