Selective separation of borate ions in water

Liquid purification or separation – Processes – Ion exchange or selective sorption

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210670, 210674, 210679, 210683, C02F 128

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045966591

ABSTRACT:
Borate ions dissolved at low concentration in water are separated efficiently with the use of a hydroxide or hydrous oxide of a rare earth element as the adsorbent. By contacting a borate ion-containing water with the adsorbent, borate ions are separated by adsorption, and the adsorbent having adsorbed borate ions is desorbed and regenerated for reuse with a desorbing solution adjusted to pH about 2 to about 4 or pH about 12 to about 14.

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