| 摘要 |
PROBLEM TO BE SOLVED: To separate chloride at low cost in a device for collecting ammonium sulfate, or the like.SOLUTION: A chloride separation method includes passing a solution L1 containing NHand Clthrough an amphoteric ion exchange resin 9, and separating a solution which has high Clconcentration and low NHconcentration from a discharge liquid of the amphoteric ion exchange resin 9. Alkaline earth metal salt can be added to a solution L4 containing NHand Clbefore passing through the amphoteric ion exchange resin 9. The solution containing NHand Clbefore passing through the amphoteric ion exchange resin 9 can be a concentrated solution.SELECTED DRAWING: Figure 1 |
