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    • 2. 发明授权
    • Heavy metal adsorbent process
    • 重金属吸附剂工艺
    • US3970553A
    • 1976-07-20
    • US525513
    • 1974-11-20
    • Kazuki TerajimaShigeru TomitaYoshindo MatsudaKeiji Abe
    • Kazuki TerajimaShigeru TomitaYoshindo MatsudaKeiji Abe
    • B01J20/22C02F1/28C02F9/00B01D15/00C02B1/52
    • C02F1/62B01J20/22C02F1/286C22B3/24C02F2101/20Y02P10/234Y10S210/912
    • A process for removing heavy metal ions from aqueous solutions with an adbent comprising granules of a mixture of nitrohumic acid and at least one binder selected from the group consisting of a carboxyl group-containing polymeric compound and a water-insoluble salt thereof. These heavy metal adsorbents are produced advantageously by either a process wherein a mixture of nitrohumic acid and a carboxyl group-containing polymeric compound is kneaded with an aqueous solution of alkali and the kneaded mixture is first subjected to an acid treatment and then shaped into granules, or a process wherein nitrohumic acid and a carboxyl group-containing polymeric compound are dissolved in an aqueous solution of alkali, the solution is acidified to form a precipitate and then the precipitate is separated and shaped into granules. The granular products thus obtained can be further improved in mechanical strength by means of a heat treatment.
    • 一种从含水溶液中除去重金属离子的方法,该吸附剂含有硝基琥珀酸与至少一种选自含羧基的聚合物及其非水溶性盐的粘合剂的混合物的混合物的颗粒。 这些重金属吸附剂有利地通过以下方法生产:其中将硝基酸和含羧基的聚合物的混合物与碱的水溶液混合,然后将捏合的混合物进行酸处理,然后成型为颗粒, 或其中将硝基酸和含羧基的聚合物溶解在碱的水溶液中的方法,将该溶液酸化以形成沉淀物,然后将沉淀物分离并成型为颗粒。 通过热处理可以进一步提高由此获得的粒状产品的机械强度。