ruthenium recycling

admin1 Precious metals 2021-04-03 13:43 0

   In particular, ruthenium recovery preferably selects the chloride concentration to minimize the formation of anionic chloride complexes, especially ferric iron. In a preferred embodiment of ruthenium acetate recovery, chloride ions are derived from metal chloride and hydrochloric acid, and the chloride ion concentration is calculated based on the amount of chloride ions in the solution of the two metals, such as chloride and hydrochloric acid in the leaching solution. In a particularly preferred embodiment, the amount of hydrochloric acid may be in the range of, and the amount of metal chloride, such as magnesium chloride, may be in the range of. Preferably, based on the specific ore to be leached and the adjustment of the temperature, the ruthenium acetate adjusts the ratio of the metal chloride metal expressed as the mass percentage in the leaching to the hydrochloric acid to optimize the leaching. The metal ratio of the chloride leaching agent solution in the leaching step may be in the range of, preferably in the range of. The leaching is best carried out at a temperature of about, until the boiling point of the leaching solution is about at room temperature. Preferred examples of alkali metal peroxides are sodium peroxide and potassium peroxide.
 

 
   Preferred examples of Unicore Recycling Pte Ltd perchlorate are sodium perchlorate and potassium perchlorate. Ruthenium acetate can be leached with a leaching agent with a low concentration of hydrochloric acid. The hydrochloric acid is preferably added in an amount sufficient to leach out all base metals and iron if necessary and to obtain the selected amount. Therefore, the amount of hydrochloric acid added is preferably the stoichiometric amount of acid required to leach the selected valuable metal and keep the leaching agent in the selected one. The ruthenium particles range and are more preferably slightly excessive, for example. Therefore, the amount of acid added to the leaching agent can be determined by monitoring the leaching agent during the leaching step and adding additional acid as the leaching agent increases above a selected value. The amount of acid required will vary depending on the concentration of valuable metals in the ore in the ore composition. Especially if the ore is more concentrated, a higher amount of acid will generally be required. Also in the leaching process, different sulfides require different amounts of acid. For example, the overall reactions that may occur during the leaching process are as follows. Chalcopyrite, chalcopyrite, boronite, anhydrite, bentonite, calcium and magnesium ore is cobalt ore galena.


 
   For example, compared with the unicor recovery of ruthenium acetate, the nickel concentrate recovered from ruthenium acetate requires more acid. For example, times the mass ratio . The use of such a low concentration of hydrochloric acid and the control of the sum of redox potentials are considered to be an important aspect of controlling the form of sulfur obtained from the sulfide in the ore, that is, the conversion of the sulfide. Sulfur becomes hydrogen sulfide instead of sulfate ions. The amount and type of oxidant used are the controlling factors. In a particularly preferred embodiment, the leaching conditions and leaching conditions are selected so that the ruthenium particles are leached from the base metal sulfide ore, but platinum, as discussed herein, does not substantially leached the metal group and gold, that is, and gold It remains as part of the solids in the leaching and is separated as solids by liquid-solid separation. The umicore catalyst in Pasadena, Texas controls leaching to separate gold into solids. The umicore specialty material carpet simplifies the subsequent steps to recover valuable metals. It should be understood that in the preferred embodiment of ruthenium recovery, the leaching step is controlled so that the sulfide sulfur in the sulfide ore material is converted to hydrogen sulfide instead of hydrogen sulfide, and the ruthenium particles are basically not leached and gold, for example, ruthenium acetate and Gold is less than preferably less than, more preferably less than. However, it will be understood that, depending on the subsequent recovery step, some gold and gold may be leached during the base metal leaching step and some sulfates may be produced. As described herein, in a preferred embodiment of ruthenium particles, the leaching step is controlled so that the sulfur in the sulfide ore material is converted to hydrogen sulfide instead of hydrogen sulfate. In this embodiment, hydrogen sulfide is stripped from the leaching solution in a continuous manner, and umicore smelting is most preferably stripped from the leaching solution in a continuous manner, so that the concentration of hydrogen sulfide in the leaching solution is low.


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