公开(公告)号：US4717554A

公开(公告)日：1988-01-05

申请号：US758805

申请日：1985-07-25

申请人： Junji Nomura ,  Hideaki Imai ,  Yuzuru Ishibashi ,  Tokuzo Konishi

发明人： Junji Nomura ,  Hideaki Imai ,  Yuzuru Ishibashi ,  Tokuzo Konishi

IPC分类号： C02F1/58 ,  C02F1/00 ,  C02F1/28 ,  C02F1/52 ,  C01F17/00

CPC分类号： C02F1/5245 ,  C02F1/281 ,  C02F1/66 ,  C02F2101/14 ,  C02F2103/00 ,  C02F2209/06 ,  Y10S210/915

摘要： Fluorine or fluorine compounds dissolved at low concentrations in water are efficiently separated by use of hydrated rare earth oxides or insoluble hydrated rare earth salts, particularly hydrous rare earth fluorides or hydrous rare earth phosphates, as the adsorbent. By bringing fluorine dissolved water of pH 2-7 into contact with said adsorbent, fluorine is adsorbed on the adsorbent, and the adsorbed fluorine can be desorbed by contact with an alkali solution of pH 10 to 14 to regenrate said adsorbent. Also, by addition of a precipitating agent for fluorine to the desorbed solution, fluorine compounds can be separated by precipitation and the filtrate can be reused as the regenerating solution for the adsorbent.

摘要翻译： 作为吸附剂，通过使用水合稀土氧化物或不溶性水合稀土盐，特别是含水稀土氟化物或含水稀土磷酸盐，可有效地分离在水中以低浓度溶解的氟或氟化合物。 通过使pH 2-7的氟溶解水与吸附剂接触，氟吸附在吸附剂上，吸附的氟可通过与pH10至14的碱溶液接触来解吸，以再生所述吸附剂。 此外，通过向解吸溶液中添加氟用沉淀剂，可以通过沉淀分离氟化合物，并且滤液可以再次用作吸附剂的再生溶液。