Elimination of bleach effluents
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United States of America Patent
Stats
-
Jul 7, 1992
Grant Date -
N/A
app pub date -
Aug 23, 1989
filing date -
Aug 23, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A process is provided for the treatment of an acidic aqueous effluent derived from a chlorine or chlorine compound bleaching process. The acidic effluent is reacted with a neutralizing base selected from carbonates, hydroxides and oxides of Al, Cr, Co, Fe, Mg, Mn, and Ni. The neutralized effluent is concentrated and residual base and HCl are subsequently recovered. The concentration of neutralized effluent may be accomplished by passing the neutralized effluent through the cooling tower of the pulp mill.
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