Coating processes – With post-treatment of coating or coating material – Heating or drying
Patent
1981-12-18
1983-12-20
Smith, John D.
Coating processes
With post-treatment of coating or coating material
Heating or drying
427391, 427345, 34 76, 34 23, 34 37, 81493, 162136, 162165, 162207, B05D 304
Patent
active
044217943
ABSTRACT:
Non-aqueous solvents are removed from a substrate, e.g., paper, by contacting the substrate with a condensable, vaporous heat transfer medium that is in a superheated state, e.g., superheated steam, and maintaining said substrate in contact with said superheated heat transfer medium, while also maintaining said heat transfer medium in superheated state, for a period of time sufficient to effect removal of said non-aqueous liquid from said substrate without concomitant condensation of said superheated heat transfer medium thereon. The superheated heat transfer medium, as well as being the source of energy for evaporating the solvent, acts as a solvent vapor transport medium. Upon evaporation of the solvent, the solvent vapor-heat transfer medium mixture can be sent to a recovery zone to easily recover said solvent via condensation of the mixture and thereby avoid the discharge of said solvent vapors into the atmosphere.
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Hunter, "The Use of Superheated Steam as a Drying Medium," American Dyestuff Reporter, Apr. 12, 1954, pp. 236-238.
Daane et al. "An Analysis of Air-Impingement Drying" Tappi, Jan. 1961, vol. 44, No. 1, pp. 73-80.
"Pulp-Drying Process Saves Energy, Cuts Market Pulp Production Costs," Pulp and Paper, Jun. 1980, pp. 186-187.
James River Corporation
Plantz Bernard F.
Smith John D.
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