PRODUCT & SERVICE

| Ultrapure Water Producing Plant | Process Water Treatment Plant | Standard Equipment | | Separation & Purification | Ion Exchange Resin | Water Treatment Chemicals |

< Comparison of each resin for boric acid removal property>

The ion exchange resin having N-methylglucamine as a function group is practically used for the adsorption of boric acid. The following table shows the column test result of each resin sold in Japan.

< Test condition >
Resin volume : 50 ml-R at OH form Flow rate : SV 5 Raw water analysis	Components Concentration (g/l) NaCl 2.9 MgSO4 4.8 CaCl2 0.055 NaF 0.02 NaNO3 0.6 NH4Cl 0.014 H2BO3 0.57 Total 8.96

< Profile of service run >

< Elution by sulfuric acid >

It is known to elute boric acid from the exhausted resin by using hydrochloric acid or sulfuric acid. The following figure shows the elution profile by 5% sulfuric acid.

< Refining and reuse >

There contains much chloride or sulfate in the above eluted solution. The following shows the typical treatment for the separation of boric acid and sulfuric acid by weakly basic anion resin.