Filter medium which permits increased amount of filtration

Details Filter medium which permits increased amount of filtration Filter medium which permits increased amount of filtration

1973-05-15

1976-02-17

Wyse, Thomas G.

Liquid purification or separation

Filter

Material

210506, 210510, B01D 3920

Patent

active

039390799

ABSTRACT:
A filter medium which permits an increased amount of filtration. The filter medium can be prepared by blending 100 parts by weight of aggregate particles, 5-18 parts by weight of an inorganic bonding material having a chemical composition of about 10-50% by weight of SiO.sub.2 and about 5-20% by weight of B.sub.2 O.sub.3 and containing at least 70% by weight of a non-vitreous substance such as talc or boric acid, and about 3-15 parts by weight of a combustible substance such as wheat flour, kneading the mixture with a caking material and water, molding the kneaded mixture, drying it, and then calcining the dried mixture at a temperature not lower than about 1100.degree.C. The size and number of the air-permeable pores in the filter medium can be controlled by adjusting the amounts of the bonding material and combustible substance.

REFERENCES:
patent: 3524548 (1970-08-01), McDonald et al.
patent: 3747765 (1973-07-01), Nowak

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