METHOD FOR PLATINUM GROUP METALS RECOVERY FROM SPENT CATALYSTS

    公开(公告)号:US20170145542A1

    公开(公告)日:2017-05-25

    申请号:US15318459

    申请日:2015-06-18

    CPC classification number: C22B11/06 B01J19/08 C01G55/005 C22B11/048 Y02P10/214

    Abstract: A method for recovery of platinum group metals from a spent catalyst is described. The method includes crushing the spent catalyst to obtain a catalyst particulate material including particles having a predetermined grain size. The method includes subjecting the catalyst particulate material to a chlorinating treatment in the reaction zone at a predetermined temperature for a predetermined time period by putting the catalyst particulate material in contact with the chlorine containing gas. The method also includes applying an electromagnetic field to the chlorine-containing gas in the reaction zone to provide ionization of chlorine; thereby to cause a chemical reaction between platinum group metals and chlorine ions and provide a volatile platinum group metal-containing chloride product in the reaction zone. Following this, the volatile platinum group metal-containing chloride product is cooled to convert the product into solid phase platinum group metal-containing materials.

    METHOD FOR GOLD RECOVERY AND EXTRACTION FROM ELECTRONIC WASTE OR GOLD CONTAINING MINERALS, ORES AND SANDS

    公开(公告)号:US20200332391A1

    公开(公告)日:2020-10-22

    申请号:US16759751

    申请日:2018-11-01

    Abstract: A method for recovery of gold from gold-containing materials, such as electronic waste material, minerals and sands is described. The method includes crushing the gold containing material to obtain a particulate material. The particulate material is then preheated in an oxygen-containing gas environment in a preheating zone. The method also includes mixing the oxidized particulate material with a chlorine-containing material and treating the mixture in a reaction zone. The treatment is carried out by heating the mixture to provide thermal decomposition of the chlorine-containing material and produce a chlorine-containing gas mixture, and by applying an electromagnetic field to the chlorine-containing gas mixture to provide ionization of chlorine. A volatile gold-containing chloride product, produced in the reaction zone as a result of a chemical reaction between gold and chlorine ions, is then cooled to convert the volatile gold-containing chloride product into solid phase gold-containing materials.

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