Drying and gas or vapor contact with solids – Apparatus – With means to treat gas or vapor
Patent
1985-04-11
1987-04-07
Makay, Albert J.
Drying and gas or vapor contact with solids
Apparatus
With means to treat gas or vapor
34 23, 34 36, 34155, 34228, F26B 304
Patent
active
046549803
ABSTRACT:
Non-aqueous solvents are removed from a web material, e.g., paper, by contacting the material with a condensable, heat transfer vapor, e.g. saturated steam, in countercurrent fashion. The heat transfer vapor is employed in the process in amounts of at least 50% by weight of the solvent to be removed. The process allows effective and efficient total removal and recovery of the solvent without damage to the web material. The condensable heat transfer vapor, as well as being the source of energy for evaporating the solvent, acts as a solvent vapor carrier. Condensation of the mixture in a recovery apparatus, e.g., condenser or still, allows easy recovery of the solvent.
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James Rivers Corporation
Makay Albert J.
Westphal David W.
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