Modified, fine-particle, water-insoluble aziridine polymer and use
therefore for removing heavy metals from aqueous solution
    41.
    发明授权
    Modified, fine-particle, water-insoluble aziridine polymer and use therefore for removing heavy metals from aqueous solution 失效
    改性,细颗粒,水不溶性的氮丙啶聚合物及其用于从水溶液中除去重金属的用途

    公开(公告)号:US6063286A

    公开(公告)日:2000-05-16

    申请号:US147170

    申请日:1998-10-22

    Abstract: Process for preparing fine-particle, water-insoluble polymers of aziridines by polymerizing aziridines, preferably ethylenimine, in the presence of crosslinkers which contain at least two functional groups, and in at least one ether, and also modified, water-insoluble polymers of aziridines which can be obtained by reacting fine-particle, water-insoluble, crosslinked polymers of aziridines, in aqueous medium, with carbon disulfide or formaldehyde and a nucleophilic agent from the group consisting of alkali metal cyanides, primary amines, secondary amines, alkali metal sulfites and alkali metal phosphites, and use of the modified and non-modified fine-particle, water-insoluble polymers for immobilizing active compounds, as absorbents for aldehydes, ketones and acids, and also for removing heavy metal ions from wastewaters.

    Abstract translation: PCT No.PCT / EP97 / 02062 Sec。 371日期:1998年10月22日 102(e)日期1998年10月22日PCT 1997年4月23日PCT公布。 WO97 / 40088 PCT公开 日期1997年10月30日通过在含有至少两个官能团的交联剂和至少一种醚以及改性的水的存在下聚合氮丙啶,优选乙烯亚胺来制备氮丙啶的微粒,水不溶性聚合物的方法 不溶性的氮丙啶聚合物,其可以通过将水性介质中的微粒,水不溶性,交联的丙烯腈交联聚合物与二硫化碳或甲醛反应而获得,并且亲核试剂由碱金属氰化物,伯胺,仲 胺,碱金属亚硫酸盐和碱金属亚磷酸盐,以及用于固定活性化合物的改性和未改性的微粒,水不溶性聚合物作为醛,酮和酸的吸收剂,以及用于从废水中除去重金属离子 。

    Process for the recovery of gold
    45.
    发明授权
    Process for the recovery of gold 失效
    回收黄金的过程

    公开(公告)号:US5885327A

    公开(公告)日:1999-03-23

    申请号:US708479

    申请日:1996-09-05

    CPC classification number: B01J45/00 C22B11/08 C22B3/24 Y02P10/234

    Abstract: Recovery of gold from alkaline cyanide leach solutions using ion exchange adsorbents, comprising (a) contacting the cyanide leach solution containing the gold with an extraction reagent comprised of a solid adsorbent carrying an organic base functionality of a compound having a pK.sub.a between about 9-14, such as a guanidyl functionality, to adsorb gold and eluting the adsorbed gold from the solid adsorbent with an aqueous alkaline eluant solution having a pH above about 12 and containing an alkali metal salt of an aromatic or aliphatic carboxylic acid having from about 4-14 carbon atoms, the eluant solution having incorprated therein from about 0.001 moles to about 0.2 moles per liter of an alkali metal cyanide salt. The solid adsorbent containing the aurocyanide complex may be contacted with a concentrated aqueous solution of a zinc tetracyanide salt whereby the aurocyanide complex is displaced with a zinc tetracyanide complex before treatment with the eluant solution.

    Abstract translation: 使用离子交换吸附剂从碱性氰化物浸出溶液中回收金,其包括(a)使含有金的氰化物浸提溶液与由含有pKa在约9-14之间的化合物的有机碱官能团的固体吸附剂组成的萃取试剂接触 ,例如胍基官能团,用pH高于约12的含水碱性洗脱剂溶液吸附金并从固体吸附剂洗脱金,并含有约4-14的芳族或脂族羧酸的碱金属盐 碳原子,洗脱剂溶液中含有约0.001摩尔至约0.2摩尔/升的碱金属氰化物盐。 可以将含有氰化亚胺配合物的固体吸附剂与浓缩的四氰化锌盐水溶液接触,由此在用洗脱剂溶液处理之前,用四氰化锌络合物置换亚硝酰胺络合物。

    Extraction of metal ions from an aqueous solution
    49.
    发明授权
    Extraction of metal ions from an aqueous solution 失效
    从水溶液中萃取金属离子

    公开(公告)号:US5738791A

    公开(公告)日:1998-04-14

    申请号:US714870

    申请日:1996-09-17

    CPC classification number: B01J45/00

    Abstract: A method for the making and use of a porous, preferably dimensionally stable, hydrophobic polymer for the extraction of metal ions from an aqueous solution, with the polymer being in the form of a regenerative granulate or powder having an average particle diameter of from 0.1 to 10 mm and pores of from 0.1 to 50 .mu.m, which is obtained by the dissolving of a polymer, with heating, at a temperature above the upper critical demixing temperature Tc in a complexing agent containing hydrophobic liquid, followed by lowering of the temperature, resulting in a porous polymer filled with the hydrophobic liquid, and the mechanical diminution of the solidified mass is disclosed. Favorable results have been attained using polypropylene as the hydrophobic polymer, bis(2,4,4-trimethylpentyl)thio acid as the complexing agent, and with a mixture of dibenzyl toluene and/or polypropylene glycol ether being part of the hydrophobic liquid.

    Abstract translation: 一种用于制备和使用多孔的,优选尺寸稳定的疏水性聚合物用于从水溶液中萃取金属离子的方法,聚合物为再生颗粒或粉末的形式,其具有平均粒径为0.1至 10mm,孔隙为0.1〜50μm,通过在含有疏水性液体的络合剂中,在高于上限临界分层温度Tc的温度下加热溶解聚合物而获得,随后降低温度, 导致填充有疏水液体的多孔聚合物,并且公开了固化物料的机械减小。 使用聚丙烯作为疏水性聚合物,双(2,4,4-三甲基戊基)硫代酸作为络合剂,以及二烷基甲苯和/或聚丙二醇醚作为疏水液体的一部分的混合物已经获得了有利的结果。

    Use a solvent impregnated crosslinked matrix for metal recovery
    50.
    发明授权
    Use a solvent impregnated crosslinked matrix for metal recovery 失效
    使用溶剂浸渍的交联基质进行金属回收

    公开(公告)号:US5578217A

    公开(公告)日:1996-11-26

    申请号:US346809

    申请日:1994-11-30

    Abstract: A composition comprising a crosslinked, highly porous body derived from a water-soluble hydrogel polymer, said porous body being characterized in that it has an open-celled three-dimensional lattice structure, a density of less than about 1.0 g/cm.sup.3, a surface area of equal to or greater than about 300 m.sup.2 /g, a compression strength of equal to or less than about 10 percent yield at 300 psi, and an average pore diameter of less than about 500 Angstroms, wherein said hydrogel polymer is selected from the group consisting of alginates, gums, starch, dextrins, agar, gelatins, casein, collagen, polyvinyl alcohol, polyethylenimine, acrylate polymers, starch/acrylate copolymers, and mixtures and copolymers thereof; and a metal extractant.The composition may be used in removing and/or recovering metal ions from aqueous streams.A process of recovering metal ions from an aqueous metal ion solution including the steps of impregnating a metal extractant within the porous body described above, contacting the aqueous ion solution with the impregnated porous body in order to remove the metal ions therefrom, and separating the ions from the impregnated porous body.

    Abstract translation: 一种组合物,其包含衍生自水溶性水凝胶聚合物的交联的高度多孔体,所述多孔体的特征在于其具有开孔三维晶格结构,密度小于约1.0g / cm 3,表面 面积等于或大于约300m 2 / g,在300psi下的压缩强度等于或小于约10%,平均孔径小于约500埃,其中所述水凝胶聚合物选自 由藻酸盐,树胶,淀粉,糊精,琼脂,明胶,酪蛋白,胶原,聚乙烯醇,聚乙烯亚胺,丙烯酸酯聚合物,淀粉/丙烯酸酯共聚物及其混合物和共聚物组成的组。 和金属萃取剂。 该组合物可用于从水流中除去和/或回收金属离子。 一种从金属离子水溶液中回收金属离子的方法,包括以下步骤:将金属萃取剂浸渍在上述多孔体内,使离子水溶液与浸渍的多孔体接触,以从其中除去金属离子,并将离子 从浸渍的多孔体。

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