Treatment for reducing impurities in aqueous liquor

Details Treatment for reducing impurities in aqueous liquor Treatment for reducing impurities in aqueous liquor

1990-06-29

1992-05-26

Spear, Frank

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

210652, B01D 6104

Patent

active

051165074

ABSTRACT:
The invention relates to a method of treating an aqueous liquor, such as effluent liquor formed during coal gasification. The method comprises subjecting the liquor to dephenolation and ammonia stripping treatment to remove phenolic compounds and "free" ammonia from the liquor and then subjecting the resulting liquor, which still contains ammonium compounds and thus "fixed" ammonia, to reverse osmosis treatment to produce a permeate which is substantially free from impurities, including "fixed" ammonia.

REFERENCES:
patent: 4170550 (1979-10-01), Kamody
patent: 4606830 (1986-08-01), Cleaver et al.

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