method of recovering metallic tellurium

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  • method of recovering metallic tellurium

Biosynthesis and recovery of rod-shaped tellurium ...

Thus methods are needed to recover tellurium from waste streams. The objectives of this study was to determine the feasibility of utilizing upflow anaerobic sludge bed (UASB) reactors to convert toxic tellurite (Te IV ) oxyanions to non-toxic insoluble elemental tellurium (Te 0 ) nanoparticles (NP) that are amendable to separation from aqueous ...

Tellurium, from Copper Anode Slime to High Purity Product ...

Tellurium is a rare metalloid that is vastly produced from copper anode slime, which is a by-product of the copper electrorefining process. Choosing the proper recovery method strongly depends on the slimes composition, mineralogy, and tellurium concentration. In addition, correctly selecting the right method of leaching, purification, and precipitation in …

Recovery of 131I from alkaline solution of n-irradiated ...

The tellurium activity was drawn freely through the column by using a vacuum pump and was collected and stored for recovery of target material. The mean recovery of the tellurium from the targets was 96±2.5 (standard deviation) % (n=8). The Dowex-1 column which retained the I-131 was washed with 10 ml of water and 5 ml of ethanol.

Bacterial recovery and recycling of tellurium from ...

This study demonstrates an alternative, bacterially mediated tellurium recovery process. Methods and results: We show that the hydrothermal vent microbe Pseudoalteromonas sp. strain EPR3 can convert tellurium from a wide variety of compounds, industrial sources and devices into metallic tellurium and a gaseous tellurium species. These compounds ...

SEPARATION OF TELLURIUM BY SOLVENT EXTRACTION METHOD

A method for separating tellurium according to the present disclosure may separate and recover tellurium as a high-priced metallic element from a material, such as a Bi 2 Te 3-based waste thermoelectric material, which contains not only the tellurium but also other metallic elements, simply and economically using a solvent extraction, whereby ...

RECYCLING OF CdTe PHOTOVOLTAIC MODULES: RECOVERY …

recover the tellurium from the leach solution, we explored several precipitation methods. They included (1) precipitating tellurium as tellurium dioxide using sodium hydroxide or sodium carbonate, (2) precipitating tellurium as tellurium sulfide using sodium sulfide, (3) reducing/precipitating tellurium as metallic tellurium

C22B 3 - Extraction of metal compounds from ores or ...

CN101045958A Lixiviation method for treatment substance containing selenium and/or tellurium, ... Method of recovering rare earth element from ...

A new approach to recover platinum-group metals from spent ...

After this step, the solution was kept at 65 °C overnight. To recover the trace dissolved PGMs, tellurium co-precipitation was carried out. The details of the tellurium co-precipitation are described in the literature (Enzweiler et al., 1995; Jackson et al., 1990). The remaining solid material was dissolved in aqua regia and then diluted to 50 mL.

Patents in Class 423/558

Method of recovering metallic tellurium A method of recovering metallic tellurium from a residue dust containing a major amount of lead oxide, a minor amount of tellurium oxide, and a minor amount of iron oxide which comprises the steps... 58 : 4284608

Metals | Free Full-Text | Selective Recovery of Tellurium ...

Nevertheless, a reduction in tellurium dioxide to metallic tellurium by sulfur dioxide is another important method for tellurium recovery . However, using sulfur dioxide as a reducing agent has a certain environmental risk. Therefore, it is of great interest to develop an efficient and clean treatment or separation of tellurium from TSCS.

Biomineralization of Metallic Tellurium by Bacteria ...

Reduction of tellurite into pure metallic elemental tellurium (Te 0) can be observed as formation of black tellurium precipitate (Tucker et al. 1962). Production and recovery of this scarce metalloid is required for the sustainability of green technologies such as solar cells in the future.

A process for the recovery of tellurium from minerals and ...

A process and method for recovering elemental tellurium from minerals and acidic solutions using a reducing sugar as the reducing agent in order to reduce and precipitate tellurium as tellurium dioxide (TeO2) from which elemental tellurium may be recovered. ... "Preparation of metallic tellurium", JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, …

Identification and Description of Mineral Processing ...

the recovery of tellurium metal and purification of the recovered tellurium. The process f low diagrams for a typical recovery process are presented in Exhibits 1 through 3. Exhibit 1 shows the s teps involved in producing tellurous acid from copper anode slimes. The process flow diagrams for two methods of recovering tellurium metal from

Processing technologies for gold-telluride ores

with tellurium minerals. The cooccurrence of tellurium with noble metals such as gold and silver was attributed to the semi-metallic nature of tellurium. The composition varied significantly from different tellurium minerals. For instance, ... These methods can possibly enhance the recovery of gold, however, the consumption of reagents and ...

Selective Separation and Recovery of Tellurium from Copper ...

Tellurium is a critical metalloid element that is majorly produced from copper anode slime and is widely consumed in solar energy systems. In this research, a sustainable recovery of tellurium from copper anode slime obtained from Sarcheshmeh Copper Complex, Iran, was investigated. At first, the dissolution of tellurium and other impurities from copper …

A simple method of recovery of I-131 from tellurium ...

1539 Objectives One of the most important radionuclides that is used in nuclear medicine for treatment of thyroid gland cancer and imaging of thyroid is I-131. Radioiodines are generally produced from irradiated tellurium (Te), either as metallic Te or tellurium-di-oxide (TeO2). A new and simple wet method of separation of I-131 from TeO2 using a tiny Dowex 1 column …

Tellurium separation and recovery method - Patent JP ...

Tellurium separation and recovery method - Patent JP-6708065-B2 - PubChem. National Center for Biotechnology Information. 8600 Rockville Pike, Bethesda, MD, 20894 USA. Contact. Policies. FOIA. National Library of Medicine. National Institutes of Health.

Bacterial recovery and recycling of tellurium from ...

mediated tellurium recovery process. Methods and Results: We show that the hydrothermal vent microbe Pseudoalteromonas sp. strain EPR3 can convert tellurium from a wide variety of compounds, industrial sources and devices into metallic tellurium and a gaseous tellurium species. These compounds include metallic tellurium (Te0), tellurite (TeO 3

Progress in recovery of tellurium from copper anode slime ...

A few methods on recovery of tellurium from copper anode slime, such as soda roasting, high pressure alkali leaching, sulfuric acid roasting, oxidizing acid …

Bacterial recovery and recycling of tellurium from ...

This study demonstrates an alternative, bacterially mediated tellurium recovery process. Methods and Results. We show that the hydrothermal vent microbe Pseudoalteromonas sp. strain EPR3 can convert tellurium from a wide variety of compounds, industrial sources and devices into metallic tellurium and a gaseous tellurium species.

C25C 1 - Electrolytic production, recovery or refining of ...

CN102994747A Technology for recovering metallic copper from ... CN102953081A Method and system for respectively recycling tellurium and cadmium from ... CN102925707A Recovery method for manganese ...

Bacterial Approaches to the Recovery of Scarce Metals

This thesis describes biological methods for the recovery of some of these metals, specifically the lanthanides and tellurium. ... and devices into metallic tellurium and a gaseous tellurium species. These include metallic tellurium, tellurite, copper autoclave slime, tellurium dioxide, tellurium-based PV material (cadmium telluride), and ...

Preparation of TeO2 based thin films by nonhydrolytic sol ...

Results from DTA and XRD analyses show that metallic tellurium, β-TeO 2 and α-TeO 2 phase appeared in the film during heat-treatment process at around 300, 350 and 400°C, respectively. The formation of metallic tellurium can be alleviated through preheating the gel films under O 2 atmosphere or by additions of the second component.

Tellurides Process Method - 911 Metallurgist

After filtration the tellurium may be precipitated with metallic zinc and purified by treatment with chlorine and H2SO4. The chloride of silver left in the pulp-residue may be decomposed by means of zinc and HCl, the metallic silver dissolved by H2SO4 and re-precipitated from the sulphate solution by means of metallic copper.

Tellurium - Process, Production, Technology, Applications ...

The second stage involves the recovery of tellurium metal and purification of the recovered tellurium. A common method for obtaining tellurium is to pass an electric current through dissolved tellurium dioxide (TeO2). The current breaks the tellurium dioxide down into oxygen and tellurium ... Method of Recovering Metallic Tellurium;

Bacterial recovery and recycling of tellurium from ...

This study demonstrates an alternative, bacterially mediated tellurium recovery process. Methods and Results We show that the hydrothermal vent microbe Pseudoalteromonas sp. strain EPR3 can convert tellurium from a wide variety of compounds, industrial sources and devices into metallic tellurium and a gaseous tellurium species.

Selective Recovery of Tellurium from the Tellurium-Bearing ...

large consumption of acid and alkaline and long production cycle, tellurium has a relatively low recovery rate and a high production cost [17]. Nevertheless, a reduction in tellurium dioxide to metallic tellurium by sulfur dioxide is another important method for tellurium recovery [18]. However, using sulfur dioxide as a reducing agent has a ...

Tellurium Production

Tellurium is extracted by sulphide ores processing from semi-products of copper, lead-zinc manufacture, as well as from some gold ores. Copper electrolysis sludge which contains from 0.5 to 2% Tellurium, as well as silver, gold, selenium and copper may me used as main feed stock in Tellurium production. For this purpose sludge first should be freed from copper and selenium; …

Reclaiming metallic material from an article comprising a ...

The metallic material can be precipitated out in elemental form or as a compound. First Embodiment. A preferred example of a method of separating a predetermined metallic material from an article comprising a non-metallic friable substrate is the recycling of cadmium telluride photovoltaic (CdTe PV) solar cell modules 10 (FIG. 2).

US2039256A - Process of treating refinery sludges or ...

US2039256A US711622A US71162234A US2039256A US 2039256 A US2039256 A US 2039256A US 711622 A US711622 A US 711622A US 71162234 A US71162234 A US 71162234A US 2039256 A US2039256 A US 2039256A Authority US United States Prior art keywords selenium slimes sludges tellurium copper Prior art date Legal status …

C25C 1 - Electrolytic production, recovery or refining of ...

CN101787547B Method for recovering valuable metals from waste printed circuit board 06/15/2011 CN101660069B Complex alloy used for anode plate for refining metallic copper by electrolysis and ...

US2076738A - Recovery of tellurium - Google Patents

US2076738A US67998A US6799836A US2076738A US 2076738 A US2076738 A US 2076738A US 67998 A US67998 A US 67998A US 6799836 A US6799836 A US 6799836A US 2076738 A US2076738 A US 2076738A Authority US United States Prior art keywords tellurium selenium sulphuric acid mixture precipitates Prior art date Legal status (The legal …

US5939042A - Tellurium extraction from copper ...

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, …

Selection of reductants for extracting selenium and ...

This paper focused on investigating high-efficient reductants of recovering selenium and tellurium from degoldized solution of copper anode slimes. Firstly, the effect of various reductants on recovery rates of Se and Te was investigated based on thermodynamic analysis of various metallic ions in degoldized solution.

US2981595A - Recovery of tellurium - Google Patents

US2981595A US769555A US76955558A US2981595A US 2981595 A US2981595 A US 2981595A US 769555 A US769555 A US 769555A US 76955558 A US76955558 A US 76955558A US 2981595 A US2981595 A US 2981595A Authority US United States Prior art keywords tellurium copper residue slimes sulfate Prior art date Legal status (The …

JP2020158855A - Method for separating and recovering ...

To provide a method for recovering at least one of platinum and palladium and/or at least one of selenium and tellurium.SOLUTION: A method for separating and recovering at least one of platinum and palladium and/or at least one of selenium and tellurium, including a step of preparing a precipitate containing at least one of platinum and palladium and containing at …

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