Importance

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Abstract

A method for removal and condensation of vapors from within an enclosed space is disclosed. An enclosed space containing hydrocarbonaceous material is surrounded by an insulative permeable layer having a lowering temperature gradient between the inner surface and the outer surfaces. The insulative layer may also be covered by an impermeable layer. Heating the material in the enclosed space causes the formation of vapors at a positive pressure within the enclosed space. Vapors pass through the inner surface of the insulative permeable layer and contact the permeable materials and are condensed by the lowering temperature within the insulative layer. The condensate liquid passes downwardly through the insulative layer and is then collected. The positive pressure within the heated enclosed space and the condensation and lowering of pressure and temperature within the insulative layer serves to draw additional vapors from within the enclosed space into the insulative layer which facilitates condensation and subsequent collection.

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First Claim