Desiccant

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desiccant

[′des·i·kənt]
(chemistry)

Desiccant

 

(or drying agent), a liquid or solid that takes up moisture, used for drying gases, liquids and, more rarely, solids. Desiccants are divided into three major groups: (1) water-adsorbing desiccants, (2) desiccants that form hydrates with water, and (3) desiccants that form other chemical compounds with water. The first group includes aluminum oxide, silica gel, and other adsorbents; the second group comprises certain anhydrous salts and fused hydroxides; and the third group includes metallic sodium and calcium, calcium oxide, and phosphorus pentoxide. The state of aggregation of the substance to be dried, the moisture content of the substance, and the drying conditions determine the selection of a particular desiccant. It is absolutely essential that the desiccant does not react with the substance to be dried.

desiccant

Any absorbent or adsorbent, liquid or solid, that will remove water or water vapor from a material. In a refrigeration circuit, the desiccant should be insoluble in the refrigerant.
References in periodicals archive ?
Galka recommends that home owners always control the existing moisture level in their homes by placing DampRid environmentally friendly calcium chloride moisture absorbers in key areas such as bathrooms, kitchens, laundry rooms, basements, and garages.
Place DampRid moisture absorbers in bathrooms, kitchen and laundry areas, and closets to create fresher, healthier indoor air.
Place DampRid moisture absorbers in key areas such as bathrooms, kitchens, laundry rooms, closets, basements, and garages.
Chemical, one of Japan's leading makers of mothballs, aromatics and moisture absorbers, said the brisk sales and cost reduction more than offset extraordinary losses caused by appraisal losses on its securities holdings and restructuring costs.
Consumers hate paying for yucky moisture absorbers in fresh meat and poultry packages.
If the condensation is just on the windows, try putting moisture absorbers (B&Q, pounds 8.
Products such as DampRid Moisture Absorbers remove excess moisture from the air and automatically bring relative humidity to just the right level.