Dissolution of turbidity by deionizer resins

Technical Report · Fri Feb 20 04:00:00 EST 1959

OSTI ID:5257572

Baumann, E W

Laboratory experiments have confirmed that ..beta..-Al/sub 2/O/sub 3/.3H/sub 2/O, the principal constituent of turbidity, dissolves in the presence of the deionizer resins. The cation resin, Amberlite IR-120-H, can be converted completely to the Al/sup +3/ form in this way. The anion resin, Amberlite IRA-400-OH, apparently can be only 10 to 20% converted to the AlO/sub 2/ form in this way. The rate of dissolution is dependent on the alumina/resin ratio. For an alumina content of 3 wt %, which is the amount found in the resins from the 105-P deionizer3, the rate of cation resin exhaustion will be at most 0.4%/day. This concentration of 3 wt % amounts to more than enough alumina to completely exhaust the cation resin in the deionizer. Removal of turbidity prior to deionization would eliminate this problem, but the long lifetimes of the deionizers currently experienced indicate this is not urgent. However, it is suggested that a given deionizer should not be used intermittently but rather that it should be used continuously to breakthrough, since this dissolution will proceed whether or not the deionizer is on line, once the deionizer contains some turbidity. Also, a deionizer once in service and then out of service for several months should not be counted on to deionizer, since it may become exhausted in the meantime due to dissolution of alumina. This dissolution process is too slow to be a practical method for removal of turbidity from the moderator system.

• Research Organization: Du Pont de Nemours (E.I.) and Co., Aiken, SC (USA). Savannah River Lab.
• DOE Contract Number: AC09-76SR00001
• OSTI ID: 5257572
• Report Number(s): DPST-59-202; ON: DE84005572
• Country of Publication: United States
• Language: English

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