摘要:
An agent for treating metal ions in an aqueous solution, in particular for treating noble metal complex ions such as gold cyano ions in plating waste waters for recovering a noble metal therefrom, which comprises an anthrahydroquinone compound and a metal supported on a carbonaceous carrier.
摘要:
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/cm3, a surface area of equal to or greater than about 300 m2/g, a compression strength of equal to or less than about 10 percent yield at 300 psi, and an average port diameter of less than about 500 Angstroms, wherein said hydrogen 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.
摘要:
L'invention concerne la récupération dans des catalyseurs usés, de molybdène et de vanadium à l'état sensiblement pur. Elle est caractérisée par une succession d'étapes comportant notamment une lixiviation des molybdate et vanadate, une adsorption sur résine échangeuse d'ions et à une élution sélective pour récupérer séparément le molybdène et le vanadium.
摘要:
A process for recovery of gold from an impure precious and base metal-bearing acidic chloride or mixed chloride/sulphate solution comprises the steps of contacting the acidic solution with a polymeric acrylic ester adsorbent ion exchange resin to selectively adsorb gold, and stripping the gold from the loaded resin by elution with water.
摘要:
A process for recovery of gold from an impure precious and base metal-bearing acidic chloride or mixed chloride/sulphate solution comprises the steps of contacting the acidic solution with a polymeric acrylic ester adsorbent ion exchange resin to selectively adsorb gold, and stripping the gold from the loaded resin by elution with water.
摘要:
A process for recovery of gallium from aqueous solution containing gallium by adsorbing gallium to a chelate resin is disclosed. According to this process, the aqueous solution containing gallium is contacted batchwise with a chelate resin having a high selective adsorptivity for gallium or by flowing the aqueous solution through the resin at a rate of at least 20 parts by volume/hr of the aqueous solution per 1 part by volume of the resin.