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Assignee: Drinkard Metalox, Inc.


Location: Charlotte, NC
No. of patents: 8

NumberTitleIssue Date
8038767Method of recovering metal values from ores
An improved method for processing of nickel bearing saprolite and limonite ores to recover the valuable minerals contained therein, comprising leaching the ore with nitric acid to form a slurry; separating the iron values by precipitation, removing the iron values; ...
10/18/2011
8016913Nickel-laterite process
An improved method for processing of nickel-bearing ores, laterite ores, saprolite and limonite ores, oxidic and sulfide ores, metallurgical wastes, and other metal-bearing materials, to recover the valuable minerals contained therein, comprising comminuting ore to ...
09/13/2011
6264909Nitric acid production and recycle
An improved process for either the manufacturing of nitric acid, recycling of nitric acid, or recovering of nitric acid, comprising the steps of: providing a source of NOx ; reacting NO from the source of NOx with HNO3 in ...
07/24/2001
5997718Recycling of CdTe photovoltaic waste
A method for extracting and reclaiming metals from scrap CdTe photovoltaic cells and manufacturing waste by leaching the waste with a leaching solution comprising nitric acid and water, skimming any plastic material from the top of the leaching solution, ...
12/07/1999
5980842Separation of calcium from metal compounds
A method of separating calcium from mixtures of metal oxides, sulfides, nitrates and carbonates. Particulate calcium containing mixtures are leached with nitric acid to form calcium nitrate and metal nitrates, which are heated to dryness and to form metal...
11/09/1999
5912402Metallurgical dust recycle process
A treatment of metallurgical dust and recovery of valuable chemical commodities, comprising the steps of: leaching salts from the dust with water to create a washed EAF dust; reacting the washed EAF dust in a nitric acid solution resulting in a nearly com...
06/15/1999
5897685Recycling of CdTe photovoltaic waste
A method for extracting and reclaiming metals from scrap CdTe photovoltaic cells and manufacturing waste by leaching the metals in dilute nitric acid, leaching the waste with a leaching solution comprising nitric acid and water, skimming any plastic mater...
04/27/1999
5779877Recycling of CIS photovoltaic waste
A method for extracting and reclaiming metals from scrap CIS photovoltaic cells and associated photovoltaic manufacturing waste by leaching the waste with dilute nitric acid, skimming any plastic material from the top of the leaching solution, separating ...
07/14/1998
 
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