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The present invention is concerned with a method for the substantially selective extraction of tellurium from copper electrorefining slimes. The method comprises maintaining a molar ratio Ag/Se, Ag/S or Ag/Se+S at a value of about 2 or less in the slimes during leaching thereof in an autoclave. The excess of selenium and/or sulphur allows the formation of Ag.sub.2 Se or Ag.sub.2 S, which ...

Patent Buddy is the world ... 6,395,059 Situ desulfurization scrubbing process for refining blister copper ... 5,939,042 Tellurium extraction from copper ... Get Price; Tellurium extraction from copper electrorefining … Tellurium extraction from copper electrorefining slimes ... tellurium from copper electrorefining slimes ... tellurium from ...

nickel and copper ores (Chizhikov and Shchastlivyi, 1970). The extraction processes of tellurium from tellurium bearing-ma-terials have been reported as a challenging and complicated process (Chizhikov and Shchastlivyi, 1970; Cooper, 1971). The methods and the degree of treatment of tellurium-bearing ores affect the efficiency of

Elemental Selenium Or Tellurium Patents and Patent. Abstract: A method of increasing the extraction of tellurium from copper electrorefining slime comprises leaching the slime with dilute sulphuric acid in a reactor under a partial oxygen pressure of up to 150 psi and at an elevated temperature between about 100.degree. and 200.degree.

USPTO patent application no. 09122379 in the United States Patent and Trademark Office. ... Tellurium Extraction From Copper Electrorefining Slimes Patent Application United States Patent and Trademark Office, Patent Application No. 09122379 Examiner Steven J Bos, presiding. No tags have been applied so far.

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Extraction of copper and gold from anode slime of Sarcheshmeh Copper Complex mortaza zivdar 2016, Journal of the Southern African Institute of Mining and Metallurgy

US5939042A * Noranda, Inc. Tellurium extraction from copper electrorefining slimes DE19983250T1 * Asahi Chemical Ind Verfahren zur Herstellung eines...

An improved process for extraction of copper, selenium, tellurium and gold from anode slime ofcopper electrorefining plant which comprises:(i) grinding the anode slime of composition such as herein described to 140 - 160 µm in size,(ii) characterised in that adding sulphuric acid and additive

A method of increasing the extraction of tellurium from copper electrorefining slime comprises leaching the slime with dilute sulphuric acid in a reactor under a partial oxygen pressure of up to 150 psi and at an elevated temperature between about 100.degree. and 200.degree. C. until copper, nickel and substantially all of the tellurium is dissolved, thereby forming a leach slurry, and ...

U.S. Pat. No. 5,160,588 teaches a process for removing tellurium from copper slimes, wherein a copper electrode plate is suspended in a bath containing a solution of copper and tellurium sulphate, for precipitating copper telluride thereon. U.S. Pat. No. 5,271,909 is concerned with an improved method for extracting tellurium from copper slimes.

The present invention is concerned with a method for the substantially selective extraction of tellurium from copper electrorefining slimes. The method comprises maintaining a molar ratio Ag/Se, Ag/S or Ag/Se+S at a value of about 2 or less in the slimes during leaching thereof in an autoclave. The excess of selenium and/or sulphur allows the formation of Ag2Se or Ag2S, which remains insoluble ...

a method of increasing the extraction of tellurium from copper electrorefining slime comprises leaching the slime with dilute sulphuric acid in a reactor under a partial oxygen pressure of up to...

United States Patent 8277772 ... Tellurium extraction from copper electrorefining slimes: : Stafiej et al. ... There have been various reports and patents concerning extracting tellurium from tetradymites or other Te-containing raw materials with wet process, and lots of works have been done by the experts. ...

The present invention is concerned with a method for the substantially selective extraction of tellurium from copper electrorefining slimes. The method comprises maintaining a molar ratio Ag/Se, Ag/S or Ag/Se+S at a value of about 2 or less in the slimes during leaching thereof in an autoclave.The excess of selenium and/or sulphur allows the formation of Ag 2 Se or Ag 2 S, which remains ...

Hoffmann (1989) noted that tellurium in anode slimes is present as intermetallic compound of copper, silver and gold such as Cu 2 Te and (Ag, Au)Te 2 with tellurium concentration of 2-10%. Shibasaki et al., 1992, Knockaert, 2005 report typical concentrations of tellurium in the copper anode slimes from different producers .

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This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO). ... The present invention is concerned with a method for the substantially selective extraction of tellurium from copper electrorefining slimes. The method comprises maintaining a ...

Yavuz and Ziyadanogullari (2000) studied the recovery The precipitate from the previous step was washed with of gold and silver from copper anode slime. The slime water. Then 4 M nitric acid was added with phase ratio 1:10 contained Cu, Te, and Se in addition to Ag and Au. Pressure (solid to liquid).

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