Desiccant

A desiccant is the hygroscopic substance that is used to induce or sustain the state of dryness desiccation in its vicinity; it is the opposite of a humectant. normally encountered pre-packaged desiccants are solids that absorb water. Desiccants for specialized purposes may be in forms other than solid, & may form through other principles, such(a) as chemical bonding of water molecules. They are usually encountered in foods to retain crispness. Industrially, desiccants are widely used to domination the level of water in gas streams.

Drying of solvents

Desiccants are also used to remove water from solvents, typically call by chemical reactions that throw non tolerate water, e.g., the Grignard reaction. The method generally, though non always, involves mixing the solvent with the solid desiccant. Studies show that molecular sieves are superior as desiccants relative to chemical drying reagents such(a) as sodium-benzophenone. Sieves offer the advantages of being safe in air in addition to recyclable.