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US20140105797 Precipitation of Zinc from Solution  
A method of precipitating a zinc containing solid from an acidic solution containing dissolved zinc and magnesium comprising contacting the solution with a calcium containing neutralising agent to...
US20150252446 Method for Producing a High-purity Nanometer Zinc Oxide from Steel Plant Smoke and Dust by Ammonia Decarburization  
Disclosed is a method for producing a high-purity nanometer zinc oxide from steel plant smoke and dust by ammonia decarburization. The method comprises: leaching with an ammonia water-ammonium...
US20050069473 Integration processes of the treatments of zinc silicate concentrates or zinc silicate ore and roasted concentrates of zinc sulphides  
The invention refers to the many ways of integrating and joining the processes for treating ore and silicate concentrates of zinc with the product of the sulphide roaster in the zinc industry....
US20150240327 Method for Producing a High-purity Nanometer Zinc Oxide from Low-grade Zinc Oxide Ore by Ammonia Decarburization  
Disclosed is a method for producing a nanometer zinc oxide from low-grade zinc oxide ore by ammonia decarburization. The method comprises: taking ammonia water-ammonium bicarbonate solution as a...
US20150225811 RECOVERY OF ZINC FROM LEAD SLAG  
A method for recovering zinc from slag derived from lead smelting comprises subjecting the slag to a leaching step under conditions in which zinc is dissolved into solution and silica present in...
US20140205519 PROCESS FOR RECOVERING ZINC AND/OR ZINC OXIDE II  
A process for recovering zinc from a zinc containing material, the process including the steps of: leaching the zinc containing material with an alkaline lixiviant comprising an aqueous mixture of...
US20100034716 Separation method for zinc sulfide  
The separation method for zinc sulfide, in the hydrometallurgical process by a High Pressure Acid Leach for nickel oxide ore comprising leaching and solid/liquid separation step, neutralization...
US20140120012 METHOD FOR SELECTIVE PRECIPITATION OF IRON, ARSENIC AND ANTIMONY  
A method for selectively processing a polymetallic oxide solution containing a plurality of base metals comprising at least one of: Cu, Co, Ni, Zn associated with iron, comprising acid leaching...
US20110274598 SUSTAINABLE RECOVERY OF METAL COMPOUNDS  
Disclosed is a process for removing metals from waste, particularly electronic waste (or “e-waste”). The process generally includes the steps of dissolving at least some of the metals from the...
US20130064743 PROCESS FOR PURIFYING ZINC OXIDE  
A process for separating zinc from a feedstock containing a mixture of metals and metal compounds. The process includes leaching a zinc-containing feedstock with a concentrated basic solution,...
US20130216456 SELECTIVE LEACH RECOVERY OF ZINC FROM A COMPOSITE SULPHIDE ORE DEPOSIT, TAILINGS, CRUSHED ORE OR MINE SLUDGE  
Zinc and lead are usually concomitantly present in Zn—Pb ores and tailings. A novel non-polluting hydrometallurgical process for selectively leaching and recovering zinc (Zn) from a composite lead...
US20140322108 TREATMENT OF SULPHIDIC MATERIALS  
A process for treating a mixed sulphidic material containing lead sulphide and at least one other metal sulphide. The process includes the steps of subjecting the mixed sulphidic material to...
US20070098609 Hydrometallurgical process for the treatment of metal-bearing sulfide mineral concentrates  
A hydrometallurgical process for the treatment of complex silver-bearing sulfide ores and concentrates that recovers substantially all silver, lead, antimony, zinc, copper and sulfur, along with...
US20120251417 Method for Recovering Metal, and Reagent and Kit for Recovery of Metal for Use in the Same  
A method for recovering a metal, capable of recovering a metal easily without requiring the use of an organic medium, is provided. A complex between a chelating agent and a metal present in a...
US20140121138 PROCESS FOR REMOVAL OF ZINC, IRON AND NICKEL FROM SPENT COMPLETION BRINES AND PRODUCED WATER  
Zinc, nickel and iron can be recovered from spent brines and produced water using a method that includes admixing an aqueous fluid with hydrazine to form a hydrazine complex and then filtering or...
US20060127291 High density, high stability, sized metal oxide powder and process for making same  
The present invention relates generally to a novel approach to treating spent pickling acids, and a useful product resulting from such treatment or recycling approach. More specifically, the...
US20120201729 Method and Device for Separation of Recoverable Material from Products Containing Mercury  
Method of separating recoverable material from products containing mercury. The method including crushing products to form crushed material, mixing crushed material with a liquid which has an...
US20120251390 Method for Recovering Metal and Kit for Recovery of Metal for Use in the Same  
A method for recovering a metal, capable of recovering a metal easily without requiring the use of an organic medium, is provided. A first complex between a first chelating agent and a metal...
US20110123418 Process for Forming High Density Sulfides  
A process for the recovery of a metal sulfide from a metal ion containing solution, including the steps of: a) providing a slurry containing seed panicles of said metal sulfide; h) adding a...
US20150361525 METHOD OF MERCURY DECONTAMINATION  
Methods of mercury decontamination are provided that include: contacting elemental mercury with a metal salt having a standard reduction potential sufficient to oxidize elemental mercury to an...
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