公开(公告)号：US3692670A

公开(公告)日：1972-09-19

申请号：US3692670D

申请日：1969-12-29

Applicant: WATER TREATMENT CORP

Inventor： BURNS WILLIAM C ,  ROBINSON DONALD ,  NEWBERRY SIDNEY H

IPC: B01J49/00 ,  B01D15/06

CPC classification number: B01J49/09

Abstract: A METHOD FOR PURIFYING, RECONDITIONING AND SEPARATING MIXTURES OF CATION EXCHANGE RESINS AND ANION EXCHANGE RESINS WHICH ARE CONTAMINATED WITH SOLID PARTICLES OF FERRIC OXIDE AND OTHER METAL OXIDES SUCH AS CUPRIC OXIDE BY CONTACTING SAID MIXTURE OF EXCHANGE RESINS WITH A REDUCING AGENT WHICH WILL REDUCE THE FERRIC OXIDE TO THE FERROUS STATE AND FORM A WATER SOLUBLE FERROUS SALT AND, IF NECESSARY, REDUCE THE CUPRIC OXIDE TO THE CORRESPONDING WATER SOLUBLE CUPROUS SALT THEREBY EASILY REMOVING SAID OXIDES. AT THE SAME TIME, THE CATION OF THE REDUCING AGENT AS WELL AS THE FERROUS ION SUBSTANTIALLY EXHAUSTS THE CATION EXCHANGE RESIN WHILE THE ANION OF THE REDUCING AGENT SUBSTANTIALLY EXHAUSTS THE ANION EXCHANGE RESIN THEREBY CREATING A SIGNIFICANT DESITY DIFFERENTIAL BETWEEN THE ANION AND CATION EXCHANGE RESIN SO THAT SAID RESINS CAN BE EASILY SEPARATED PRIOR TO REGENERATION.