公开(公告)号：US4036751A

公开(公告)日：1977-07-19

申请号：US681781

申请日：1976-04-30

申请人： Nobuhiro Orita ,  Koichi Yabe ,  Akifumi Kawanami

发明人： Nobuhiro Orita ,  Koichi Yabe ,  Akifumi Kawanami

IPC分类号： C25D21/22 ,  B01J39/04 ,  B01J41/04 ,  C02F1/42 ,  B01D15/06 ,  B01J1/09 ,  C02B1/56 ,  C02B1/76

CPC分类号： B01J39/046

摘要： A method of treating water containing chromate by bringing the water-to-be-treated into contact with ion-exchange resins, which comprises: passing the water-to-be-treated through a bed of weakly acidic cation exchange resin in H-form at first; subsequently passing the same water through a bed of weakly basic anion exchange resin in salt form thereby to remove said chromate from the water; introducing an alkali metal hydroxide solution into said weakly basic anion exchange resin bed in the reverse direction relative to the direction of passing of the water thereby to elute chromate; and further introducing an acid solution therein thereby to convert the weakly basic anion exchange resin into salt form.

摘要翻译： 一种通过使被处理水与离子交换树脂接触来处理含铬酸盐的方法，其包括：将待处理的水通过弱酸性阳离子交换树脂床形成H型 首先; 随后将相同的水通过盐碱形式的弱碱性阴离子交换树脂床，从而从水中除去所述铬酸盐; 将碱金属氢氧化物溶液相对于水的通过方向反向引入所述弱碱性阴离子交换树脂床中，从而洗脱铬酸盐; 并进一步在其中引入酸溶液，从而将弱碱性阴离子交换树脂转化为盐形式。