公开(公告)号：US20240352610A1

公开(公告)日：2024-10-24

申请号：US18685739

申请日：2022-04-20

Applicant: THE BOARD OF TRUSTEES OF THE UNIVERSITY OF ILLINOIS

Inventor： Xiao SU ,  Stephen COTTY

IPC: C25C1/20 ,  B01J38/48

CPC classification number: C25C1/20 ,  B01J38/485

Abstract: Herein disclosed is a new electrochemical approach to catalyst capture and recycling that overcomes conventional industrial recovery methods using functionalized redox-polymer electrodes. This technology provides a redox electro-separation system comprising polyvinylferrocene that was able to capture platinum group metal based catalysts directly from products and transfer to fresh reactants achieving 99.5% recovery without disturbing catalyst activity. Several reactions were tested along with various solvent-electrolyte matrices, showing >99% recovery efficiencies for platinum species as low as 1.6 ppm.

公开(公告)号：US20230416871A1

公开(公告)日：2023-12-28

申请号：US18022571

申请日：2022-10-31

Applicant: China University of Mining and Technology

Inventor： Peng Li ,  Chenlong Duan ,  Guofo Dai

IPC: C22B11/00 ,  B01D61/02 ,  B01D69/02 ,  C23G1/08 ,  C25C1/20

CPC classification number: C22B11/04 ,  B01D61/027 ,  B01D69/02 ,  C23G1/085 ,  C25C1/20 ,  B01D2325/0283

Abstract: The present disclosure provides a method for extracting and recovering gold from an aqueous solution, the method including: (1) gold extraction from an aqueous solution through electrocoagulation, in which an electrocoagulation reaction is performed in an electrolytic cell to produce iron hydroxide in-situ, so as to capture gold in the aqueous solution and reduces the gold into gold nanoparticles in-situ; (2) pickling and liquefaction of the precipitated iron sludge, in which the obtained precipitate is dissolved in nitric acid to dissolve iron flocs after washing treatment; and (3) separation and recovery of gold through a nanofiltration membrane system, in which the resulting solution after pickling the precipitated iron sludge is subjected to cut-off treatment using a nanofiltration membrane to separate nano-sized elemental gold from the solution, and then the resultant is washed with water to obtain elemental gold. The extraction and recovery method of the present disclosure has characteristics of high gold extraction efficiency (up to 100%), low cost, simple process, good stability and environmental protection, and can recover high-grade elemental gold (with a comprehensive recovery rate greater than 95%). The method is of an important significance for technical guidance and practical engineering application for the extraction and recovery of gold in various gold smelting and extraction processes.

公开(公告)号：US11673817B2

公开(公告)日：2023-06-13

申请号：US17528774

申请日：2021-11-17

Applicant: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Jong-In Han ,  Sumin Yoo ,  Ga Yeong Kim ,  Seok Hwan Jeon ,  Jieun Son

IPC: C25C1/00 ,  C02F1/461 ,  C02F1/467 ,  C25C1/20 ,  C25C7/02 ,  C02F103/34

CPC classification number: C02F1/46109 ,  C02F1/4678 ,  C25C1/20 ,  C25C7/02 ,  C02F2001/46138 ,  C02F2103/34 ,  C02F2201/46135 ,  C02F2209/02 ,  C02F2305/08

Abstract: The present invention relates to a carbon-nanotube/nano-adsorption-material-based electrode and an electrochemical valuable-metal recovery device using the same, and more particularly to an environmentally friendly carbon-nanotube/nano-adsorption-material-based electrode and an electrochemical valuable-metal recovery device using the same, in which valuable metals selectively adsorbed from e-waste wastewater are oxidized using, as an anode, an electrode including carbon nanotubes and a nano adsorption material capable of selectively adsorbing valuable metals and are simultaneously reduced at a cathode, thereby separating and recovering valuable metals.

公开(公告)号：US20230002923A1

公开(公告)日：2023-01-05

申请号：US17570239

申请日：2022-01-06

Applicant: Greene Lyon Group, Inc.

Inventor： Svitlana Moskovchenko ,  Andre Brosseau

IPC: C25C1/20 ,  C01G5/00 ,  C22B3/08 ,  C22B3/06 ,  C22B11/00 ,  C25C7/00 ,  C01G7/00 ,  C25C7/02

Abstract: Recovery of noble metals (including the recovery of gold and/or silver from gold and/or silver containing material) is generally described. The gold and/or silver can be recovered selectively, in some cases, such that gold and/or silver are at least partially separated from non-silver and/or non-gold material. Gold and/or silver may be recovered from material using mixtures of acids, in some instances. In some cases, the mixture can comprise nitric acid and at least one supplemental acid, such as sulfuric acid, phosphoric acid, and/or a sulfonic acid. The amount of nitric acid within the mixture can be, in some instances, relatively small compared to the amount of sulfuric acid or phosphoric acid within the mixture. In some cases, the recovery of gold and/or silver using the acid mixtures can be enhanced by transporting an electric current between an electrode and the gold and/or silver of the material. In some cases, acid mixtures can be used to recover silver from particular types of materials, such as material comprising silver metal and cadmium oxide and/or material comprising silver metal and tungsten metal.

公开(公告)号：US11384443B2

公开(公告)日：2022-07-12

申请号：US16652991

申请日：2018-09-03

Applicant: INSTITUTE OF PROCESS ENGINEERING, CHINESE ACADEMY OF SCIENCES

Inventor： Hui Zhang ,  Tao Qi

IPC: C25C1/20 ,  C25C7/02 ,  C25C7/04

Abstract: A method for producing metallic silver by electro-deposition, including electrolyzing an electrolyte solution containing Ce(NO3)3 in an anode zone and an electrolyte solution containing AgNO3 in a cathode zone by using an electrolytic cell with a specific diaphragm, wherein the electrolyte solution in the anode zone is not allowed to enter the cathode zone. After the electrolyzing is complete, the metallic silver with a high purity is obtained at the cathode, and a Ce4+-containing solution is obtained in the anode zone.

公开(公告)号：US11035023B2

公开(公告)日：2021-06-15

申请号：US16524429

申请日：2019-07-29

Applicant: Battelle Energy Alliance, LLC

Inventor： Tedd E. Lister ,  Jacob A. Parkman ,  Luis A. Diaz Aldana ,  Gemma Clark ,  Eric J. Dufek ,  Philip Keller

IPC: C22B3/00 ,  C22B3/08 ,  C22B3/10 ,  C22B3/44 ,  C25C1/06 ,  C25C1/08 ,  C25C1/12 ,  C25C1/14 ,  C25C1/16 ,  C25C1/18 ,  C25C1/20 ,  C25C1/22 ,  C25C7/02 ,  C25C7/06 ,  C22B11/00

Abstract: A method of recovering metals from electronic waste comprises providing a powder comprising electronic waste in at least a first reactor and a second reactor and providing an electrolyte comprising at least ferric ions in an electrochemical cell in fluid communication with the first reactor and the second reactor. The method further includes contacting the powders within the first reactor and the second reactor with the electrolyte to dissolve at least one base metal from each reactor into the electrolyte and reduce at least some of the ferric ions to ferrous ions. The ferrous ions are oxidized at an anode of the electrochemical cell to regenerate the ferric ions. The powder within the second reactor comprises a higher weight percent of the at least one base metal than the powder in the first reactor. Additional methods of recovering metals from electronic waste are also described, as well as an apparatus of recovering metals from electronic waste.

公开(公告)号：US20200024762A1

公开(公告)日：2020-01-23

申请号：US16415531

申请日：2019-05-17

Applicant: Purdue Research Foundation

Inventor： Robert Graham Cooks ,  Anyin Li ,  Thalappil Pradeep ,  Zane Baird

IPC: C25C7/06 ,  C25C7/00 ,  C25C1/22 ,  C25C1/20

Abstract: The invention generally relates to systems and methods for producing metal clusters; functionalized surfaces; and droplets including solvated metal ions. In certain aspects, the invention provides methods that involve providing a metal and a solvent. The methods additionally involve applying voltage to the solvated metal to thereby produce solvent droplets including ions of the metal containing compound, and directing the solvent droplets including the metal ions to a target. In certain embodiments, once at the target, the metal ions can react directly or catalyze reactions.

公开(公告)号：US20180237933A1

公开(公告)日：2018-08-23

申请号：US15958525

申请日：2018-04-20

Applicant: Novellus Systems, Inc.

Inventor： Steven T. Mayer ,  David W. Porter

IPC: C25D3/60 ,  C25C7/00 ,  C25C1/20 ,  C25D21/18 ,  C25D21/14 ,  C25D5/02 ,  C25D7/12 ,  C25D17/00 ,  C25D21/12 ,  C25D5/48 ,  C25D3/56

CPC classification number: C25D3/60 ,  C25C1/20 ,  C25C7/00 ,  C25D3/56 ,  C25D5/022 ,  C25D5/48 ,  C25D7/123 ,  C25D17/001 ,  C25D17/002 ,  C25D21/12 ,  C25D21/14 ,  C25D21/18

Abstract: An apparatus for continuous simultaneous electroplating of two metals having substantially different standard electrodeposition potentials (e.g., for deposition of Sn—Ag alloys) comprises an anode chamber for containing an anolyte comprising ions of a first, less noble metal, (e.g., tin), but not of a second, more noble, metal (e.g., silver) and an active anode; a cathode chamber for containing catholyte including ions of a first metal (e.g., tin), ions of a second, more noble, metal (e.g., silver), and the substrate; a separation structure positioned between the anode chamber and the cathode chamber, where the separation structure substantially prevents transfer of more noble metal from catholyte to the anolyte; and fluidic features and an associated controller coupled to the apparatus and configured to perform continuous electroplating, while maintaining substantially constant concentrations of plating bath components for extended periods of use.

公开(公告)号：US10034387B2

公开(公告)日：2018-07-24

申请号：US14962250

申请日：2015-12-08

Applicant: Entegris, Inc.

Inventor： André Brosseau ,  Svitlana Grigorenko ,  Ping Jiang ,  Michael B. Korzenski

IPC: H05K3/22 ,  C22B7/00 ,  C25C1/20 ,  C23F1/44 ,  C22B3/00

CPC classification number: H05K3/22 ,  C22B7/007 ,  C22B7/008 ,  C22B11/046 ,  C23F1/44 ,  C25C1/20 ,  H05K2203/176 ,  H05K2203/178 ,  Y02P10/214 ,  Y02P10/234 ,  Y02P20/582 ,  Y02P70/613 ,  Y02W30/54 ,  Y10T29/49815

Abstract: Processes for recycling printed wire boards using environmentally-friendly compositions, wherein electronic components, precious metals and base metals may be collected for reuse and recycling.

公开(公告)号：US20180051382A1

公开(公告)日：2018-02-22

申请号：US15537279

申请日：2015-12-15

Applicant: UNIVERSITÉ LAVAL

Inventor： Marc-André FORTIN ,  Mathieu BOUCHARD ,  Christian SARRA-BOURNET ,  Stéphane TURGEON

IPC: C25C7/06 ,  B22F1/00 ,  B22F9/16 ,  C25C1/20 ,  C25C5/02 ,  C25C7/02 ,  H05H1/24

CPC classification number: C25C7/06 ,  B22F1/0014 ,  B22F1/0018 ,  B22F9/12 ,  B22F9/16 ,  B22F2301/255 ,  B22F2999/00 ,  C25C1/20 ,  C25C5/02 ,  C25C7/00 ,  C25C7/02 ,  H05H1/00 ,  H05H1/2406 ,  H05H2001/2412 ,  H05H2242/10 ,  H05H2245/124 ,  B22F9/24 ,  B22F2202/13 ,  B22F2201/013 ,  B22F2201/02 ,  B22F2201/03 ,  B22F2201/04 ,  B22F2201/05 ,  B22F2201/10 ,  B22F2201/50

Abstract: A dielectric barrier discharge (DBD) plasma apparatus for synthesizing metal particles is provided. The DBD plasma apparatus includes an electrolyte vessel for receiving an electrolyte solution comprising metal ions; an electrode spaced-apart from the electrolyte vessel; a dielectric barrier interposed between the electrolyte vessel and the electrode such that, when the electrolyte solution is present in the electrolyte vessel, the dielectric barrier and an upper surface of the electrolyte solution are spaced-apart from each other and define a discharge area therebetween; and gas inlet and outlet ports in fluid communication with the discharge area such that supplying gas in the discharge area while applying an electrical potential difference between the electrode and the electrolyte solution cause a plasma to be produced onto the electrolyte solution, the plasma interacting with the metal ions and synthesizing metal particles. A method for synthesizing metal particles using a DBD plasma apparatus is also provided.