Vapor exchange medium

Stock material or miscellaneous articles – Structurally defined web or sheet – Discontinuous or differential coating – impregnation or bond

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428228, 428289, 502 70, B32B 516

Patent

active

054458765

ABSTRACT:
A vapor exchange medium comprises a multiplicity of porous desiccant particles and a binder holding the particles together to form a solid shape. The binder includes a multiplicity of substantially spherical, covalently-bonded silica particles derived from a silica sol which are small enough to ensure sufficient covalent bonding of the silica particles to maintain the structural integrity of the vapor exchange medium, yet large enough relative to the pore size of the desiccant particles such that the silica particles do not materially adversely affect the adsorption properties of the desiccant particles. The vapor exchange medium has an isotherm separation factor of 0.07 to 0.1 The vapor exchange medium may be impregnated into a fibrous carrier to form a heat exchange element or device. Apparatus for making the a exchange device is also disclosed.

REFERENCES:
patent: 4391667 (1983-07-01), Vangbo et al.
patent: 4595403 (1986-06-01), Sago et al.
patent: 4875520 (1989-10-01), Steele et al.
patent: 5052188 (1991-10-01), Komarneni et al.
Hackh's Chemical Dictionary, 3rd ed., McGraw-Hill, p. 213 (1944).

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