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Abstract

The apparatus and method includes the heating of an inert gas stream, such as nitrogen or inert gas with a low oxygen content, to remove volatile organic compounds from an adsorption bed. The inert gas is then cooled by an evaporator to precipitate or condense the volatile organic compounds into a sump. Gas sensors sense the various volatile organic compound gas concentrations at the inlet and discharge of the evaporator and send signals representative of the concentrations to a signal processor and control logic module. The signal processor and control logic module selectively opens and closes valves which lead from the sump to various containers thereby separating various volatile organic compounds into selected containers. Further, the signal processor and control logic module can generate process control signals to vary the operation of the heating of the gas stream, the cooling of the gas stream, and the circulation of the gas stream.

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First Claim