公开(公告)号：US5127992A

公开(公告)日：1992-07-07

申请号：US397683

申请日：1989-08-23

申请人： Christopher J. Davies ,  Volkmar J. Bohmer ,  Michael D. Birkett

发明人： Christopher J. Davies ,  Volkmar J. Bohmer ,  Michael D. Birkett

IPC分类号： D21C9/12 ,  D21C9/14 ,  D21C11/00

CPC分类号： D21C11/0007 ,  D21C9/14

摘要： 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.