Complete precipitation of tellurium was attained at 80 °C, using both cuprous ion and metallic copper. The cementation method employed has proven the possibility of tellurium ion reduction solely with the metallic copper. The generated cuprous telluride precipitate was eventually alkaline leached and electroplated from solution on a …

The results show that the tellurium purity can reach up to 99.97% and the tellurium recovery rate was above 99%. The cadmium and sulfur contents in the tellurium were 0.0061% and 0.0194% ...

Abstract The results of study aimed at extraction of tellurium from its compound with copper in the form of oxides by the pyrometallurgical method are presented in the paper. Technical copper telluride of Kazakhmys Corporation LLP containing crystalline phases (%) 36.5 Cu7Te4, 28.5 Cu5Te3, 12.9 Cu2Te, 16.2 Cu2.5SO4(OH)3·2H2O, and …

Tellurium (Te) is a member of the chalcogen group, which includes oxygen, sulphur, selenium (Se) and polonium [ 1 ]. The first three members of the chalcogen group have crucial functions in biochemistry, biology and medicine, whereas Te is a strange element with no apparent role in biological systems. Moreover, it belongs to the group of …

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. ... and (iii) reduction, where the metallic ions are reduced and precipitated …

During the process tellurite was transformed into metallic tellurium. The process, when carried out in a 2-1 continuously stirred tank reactor in the presence of sucrose and diammonium hydrogen ...

Methods of tel- lurium recovery are based on hydro- metallurgical treatment either by direct leaching of the raw slimes with sulfuric acid in the presence of oxygen (pres- sure) or …

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.

After tellurium precipitation, the generated rich electrolyte can be recirculated to the electrowinning cycle [12–17]. This study has mainly focused on the process develop-ment of the tellurium recovery from the copper anode slime of Sarchechmeh Copper Complex. Regardless of all known methods in tellurium recovery from the copper anode slime,

However, Se and Te recovery are of secondary importance, so various methods are raised for metals recovery . The chemical and physical specifications of selenium are akin to tellurium, which is an arduous purification process [ 7, 10, 11, 12 ].

A method for recovering a metal from either an acidic or a basic solution using an aluminum cementation process is disclosed. The method involves adding an aluminum-containing powder to a tellurium-containing solution to precipitate tellurium from the tellurium-containing solution and then removing the precipitated tellurium therefrom.

carry out the process of obtaining high-purity tellurium by the vacuum distillation method, a reactor design consisting of high-purity quartz glass and graphite is proposed. During the process, the tellurium melt evaporates; and the vapor is transferred from the hot part of the system to the colder one and condenses in the form of a solid …

In this paper, a novel process for selective recovery of tellurium from the sodium carbonate slag by sodium sulfide leaching, followed by cyclone electrowinning, was proposed. 88% of tellurium …

Method of recovering metallic tellurium US4352786A (en) * : : Institute Of Nuclear Energy Research: Treatment of copper refinery anode slime US8900543B2 (en) * : : Korea Institute Of Science And Technology: Separation of tellurium by solvent extraction method ...

To date, few results have been reported for logic circuits with modern tellurium growth methods. ... A superconducting state is also observed in the metallic phase of Te above 4 GPa 110,111.

The recovery rate of tellurium and bismuth were 84.9% and 97.1%, respectively. ... The traditional smelting process of bismuth sulphide concentrate faces problems of low metallic bismuth recovery, ... Moreover, some other traditional methods were also employed to recovery tellurium such as burning [8], chemical precipitation …

Tellurium (Te) is a semimetal rare element in nature. Together with oxygen, sulfur (S), and selenium (Se), Te is considered a member of chalcogen group. Over recent decades, Te applications continued to emerge in different fields including metallurgy, glass industry, electronics, and applied chemical industries. Along these lines, Te has recently …

The invention provides a kind of method reclaiming tellurium from alloy, step is as follows: step S1: is mixed homogeneously with water by the alloyed scrap after broken sieving, adds hydrochloric acid reaction and form the first mixed liquor；Step S2: add oxidant to the first mixed liquor, reaction forms the second mixed liquor；Step S3: filter the second mixed …

As a rule, ball mill alkali leaching followed by purification, sulfuric acid neutralization, sodium hydroxide leaching, and electrowinning, has been used widely for the recovery …

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 …

The main constituent phase of the condensate is tellurium oxide (TeO2), which can be further processed during one operation to elemental chalcogen by thermal reduction or electrolytic method ...

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.

Silver is readily cemented on metallic copper or raw slimes. Selenium requires a somewhat longer cementation time, while tellurium is more resistant to cementation than selenium. ... There are three methods for recovering elemental tellurium from the mud: (1) direct reduction by heating with flour under a borax cover; excessive fuming of ...

The recovery of tellurium from the aqueous solution was finally realized by reduction with Na 2 SO 3 under the parameters of Na 2 SO 3 /Te mole ratio of 3.2, …

Numerous viable approaches have been developed to produce metallic Te, including the chemical method, electrowinning, vacuum distillation, and zone melting (Fan et al., 2016; Guo et al., 2015; Kowalik et al., 2015). ... An environmental-friendly process for recovery of tellurium and copper from copper telluride. Journal of Cleaner Production ...

mediated tellurium recovery process. Methods and Results: We show that the hydrothermal vent microbe Pseudoalteromonas sp. strain EPR3 can convert tellurium …

Method of recovering metallic tellurium US4299810A (en) * : : Kennecott Corporation: Process for separating selenium and telurium from each other US4792405A (en) * : : Shell Oil Company: Removal of hydrogen selenide liquids US4790945A (en ...

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 ...

The figure shows the leaching efficiency of tellurium increases from 84% to 90% as pressure increased from 0.5 to 1.0 MPa. Meanwhile, the leaching efficiency of …

A method of production of iodine-131 which comprises subjecting a compound of tellurium selected from the group consisting of tellurium oxide and telluric acid to neutron irradiation resulting in the production of iodine- 131, precipitating the resultant compound in an aqueous solution of an alkaline earth as an iodine-containing salt, heating ...