Diatomaceous earth filteraid and method for its manufacture

Details Diatomaceous earth filteraid and method for its manufacture Diatomaceous earth filteraid and method for its manufacture

1978-12-27

1980-02-05

Sever, Frank

Liquid purification or separation

With alarm, indicator, register, recorder, signal or...

Responsive to fluid flow

210 38R, 210 79, 210 81, 252449, B01D 1506

Patent

active

041871740

ABSTRACT:
A method is provided for treating diatomaceous earth filteraids having a beer-soluble iron content of less than about 0.01% to further reduce the beer-soluble iron content by maintaining the filteraids in contact with a relatively small volume of an acid. In the filteraids so produced, the beer-soluble iron content can be reduced by as much as 70% to 100%. In making the filteraids of this invention, sulfuric acid in about 0.1 to about 3.0 normal solution can be used to treat the starting filteraids.

REFERENCES:
patent: Re20844 (1938-09-01), Calvert et al.
patent: 665652 (1901-01-01), Enzinger
patent: 1992547 (1935-02-01), Schvetz
patent: 2322674 (1940-11-01), Thomas
patent: 2701240 (1951-06-01), Bregar
patent: 3013981 (1961-12-01), Riede
patent: 3940498 (1976-02-01), Butterworth et al.

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