Method of purifying waste water

Details Method of purifying waste water Method of purifying waste water

1975-10-16

1976-12-21

Hart, Charles N.

Liquid purification or separation

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

Responsive to fluid flow

210 40, 162 29, B01D 1500

Patent

active

039987302

ABSTRACT:
The dissolution and loss of granular .gamma.-alumina in acidic water conted with the alumina for purification from lignin and its derivatives can be reduced or eliminated by adding to the acidic waste water an aluminum salt of mineral acid. A flocculate of aluminum hydroxide having the impurities adsorbed thereon is formed on the granular aluminum oxide, and is converted to .gamma.-alumina when the granular material is calcined in air for combustion of the organic waste material.

REFERENCES:
patent: 3429660 (1959-02-01), Keith et al.
patent: 3468625 (1969-09-01), Nightingale et al.
patent: 3625886 (1971-12-01), Mattia
patent: 3763040 (1973-10-01), Timpe et al.
patent: 3853789 (1974-12-01), Warthern et al.

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