Heavy metal adsorbent process
    2.
    发明授权
    Heavy metal adsorbent process 失效
    重金属吸附剂工艺

    公开(公告)号:US3970553A

    公开(公告)日:1976-07-20

    申请号:US525513

    申请日:1974-11-20

    摘要: 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.

    摘要翻译: 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。

    Nitrohumic acid-containing adsorbents and process for producing same
    3.
    发明授权
    Nitrohumic acid-containing adsorbents and process for producing same 失效
    含有硝酸的吸附剂及其制备方法

    公开(公告)号:US4013585A

    公开(公告)日:1977-03-22

    申请号:US489505

    申请日:1974-07-18

    CPC分类号: C02F1/286 C02F3/34

    摘要: New adsorbents comprising granules of a mixture of nitrohumic acid and oner more proteins. These adsorbents are utilizable effectively for adsorbing heavy metals and oils contained in water. They are produced advantageously by either a process wherein a mixture of nitrohumic acid and a protein 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 protein 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.

    摘要翻译: 新的吸附剂包括硝基酸和一种或多种蛋白质的混合物的颗粒。 这些吸附剂可有效地用于吸附水中所含的重金属和油。 它们有利地通过以下方法产生:其中将硝基琥珀酸和蛋白质的混合物与碱的水溶液混合,并将捏合的混合物首先进行酸处理,然后成型为颗粒,或其中将硝基酸和 将蛋白质溶解在碱的水溶液中,将溶液酸化以形成沉淀物,然后将沉淀物分离并成形为颗粒。 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。

    Oil adsorbent and a method of producing same
    5.
    发明授权
    Oil adsorbent and a method of producing same 失效
    油吸附剂及其制备方法

    公开(公告)号:US4072794A

    公开(公告)日:1978-02-07

    申请号:US738438

    申请日:1976-11-03

    摘要: An oil adsorbent comprising natural fibers the surface of which is coated with a water-repellent paraffin layer which is in turn coated with an elastic rubber layer. The adsorbent is manufactured by treating the surface of the natural fibers with a paraffin emulsion, drying the fibers to form a water repellent paraffin layer thereon, treating the product with a latex, and then curing the latex to form an elastic rubber layer on the paraffin layer. The oil adsorbent has such advantages that it floats on the surface of water stably for a long period of time retaining its original form, that the contained paraffin is not back extracted by adsorbed oil and that it does not cause any trouble on burning.

    摘要翻译: 一种油吸附剂,其包含天然纤维,其表面涂覆有斥水石蜡层,其又被弹性橡胶层涂覆。 通过用石蜡乳液处理天然纤维的表面来制造吸附剂,干燥纤维以在其上形成拒水石蜡层,用胶乳处理产物,然后固化胶乳以在石蜡上形成弹性橡胶层 层。 油吸附剂具有这样的优点,即在长时间内稳定地保持其原始形状的水稳定地悬浮在水中,所含的石蜡不被吸附油反萃取,并且不会引起燃烧故障。