公开(公告)号：US3847757A

公开(公告)日：1974-11-12

申请号：US36654573

申请日：1973-06-04

Applicant: NAT STEEL CORP

Inventor： SMITH R

IPC: B01J49/00 ,  C25D21/22 ,  C23F13/00 ,  C01G37/00 ,  C23B5/16

CPC classification number: C25D21/22 ,  B01J49/08

Abstract: Chromium values are recovered from wash water following a chemical treatment step in electrotinplating lines in a process comprising treating in a cation exchange zone, treating in an anion exchange zone, regenerating the anion exchange zone, treating effluent from said regeneration in a cation exchange zone and passing effluent from the cation exchange zone to a storage zone, passing effluent from said regeneration to the storage zone without intermediate cation exchange treatment.

Abstract translation: 在电镀锡线中的化学处理步骤之后，在阳离子交换区中进行处理，在阴离子交换区中处理，再生阴离子交换区，在阳离子交换区中处理来自所述再生的流出物，以及 将流出物从阳离子交换区传递到储存区，将来自所述再生的流出物传递到储存区而不进行中间阳离子交换处理。