Pourable solid filter material, particularly for the removal of

Details Pourable solid filter material, particularly for the removal of Pourable solid filter material, particularly for the removal of

1974-05-31

1978-01-24

Guynn, Herbert B.

Compositions

Co, s, negative element, or acid, bindant containing

With absorbents

252184, 252186, 252192, 252193, 2522595, 423230, 423237, 423239, 423244, 428407, C01K 300

Patent

active

040703002

ABSTRACT:
A pourable solid filter material for the removal of foreign gases, particularly unpleasant odors, from the air comprises a granular composition. The granular composition is a mixture of at least one acid or basic chemosorptive substance which reacts chemically with the foreign gas, and a substance which stores moisture. A binder which binds the chemosorptive substance into the form of granules is preferably also used as the moisture storing substance. The granules may consist of spherical particles between 0.5 to 5 mm. in diameter. Suitable acid chemosorpents include organic carboxylic acids, amidosulphonic acid, p-toluene sulphonic acid, boric acid, sodium, potassium and ammonium hydrogen sulphates and phthalic andydride. Preferred basic chemosorbents include sodium and potassium carbonates, oxides or hydroxides of calcium and barium, sodium metasilicate, lithium carbonate, hydroxides of sodium or potassium, cement, and potash, double, and soda water glass. Suitable for the water soluble (or capable of swelling) binder or adhesive are cellulose derivatives, e.g., methyl-, carboxymethyl-, hydroxyethyl- and ethyl-cellulose, cellulose derivatives of the Tylose or Culminal grades, polyvinyl alcohol, collagen, alginates, pectins and starch.

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