· The recoveries from solution were 98 and 96%. The concentrate grades were 7.2-7.6% Re, low principally because of the high elemental sulfur content. The sulfur can form by reaction of some of the H2S with reduced sulfur species eluted from the resin.

 · Recovery of Molybdenum and Rhenium Using Selective Precipitation Method from Molybdenite Roasting Dust in Alkali Leaching Solution Sung-Ho Joo 1,2, Young-Uk Kim 1, Jin-Gu Kang 2, Ho-Sung Yoon 2, Dong-Su Kim 3 and Shun Myung Shin 1,2, + 1 Department of Resource Recycling, University of Science & Technology (UST), Daejon …

 · Abstract. Rhenium is an irreplaceable component in some catalysts and heat-resistant alloys. Although much required, rhenium production from natural minerals is limited due to its scarcity and ...

and uranium production. Therefore, the recovery of rhenium from them is usually carried out by a hydrometallurgical process.3ﾂｭ6)The hydrometallurgical process for the produc- tion of rhenium from the related by-products can be divided into two major successive processes, which are leaching process and recovery process. In the leaching process, the

 · Recovery of rhenium by solvent extraction can be considered to be a two step process involving concentration of a low grade highly contaminated dilute feed to a relatively pure concentrated feed, and final …

 · The base mineral raw materials for recovery of rhenium in Kazakhstan are by-products of copper, lead and uranium production. In pyrometallurgical processing of …

 · Molybdenum and Rhenium Recovery. Figure 8 details the process sequence employed for recovering molybdenum and rhenium from the electrooxidation reaction pulp. Liquid-solids separation was …

 · DOI: 10.1016/J.SEPPUR.2017.09.021 Corpus ID: 104125676; Selective recovery of rhenium from molybdenite flue-dust leach liquor using solvent extraction with TBP @article{Cheema2018SelectiveRO, title={Selective recovery of rhenium from molybdenite flue-dust leach liquor using solvent extraction with TBP}, author={Humma …

 · This paper introduces a resin-in-pulp (RIP) hydrometallurgical process, which is widely used in gold leaching and recovery industry, to recover rhenium effectively and economically from ...

The U.S. Department of Energy's Office of Scientific and Technical Information

 · Recovery of rhenium by solvent extraction can be considered to be a two step process involving concentration of a low grade highly …

 · In the adsorption process, the recovery rate of rhenium reached 97.13% after approximately 960 BVs of leach solution flow. The loaded resins were eluated using …

The nickel-based superalloys are most suitable for gas turbine construction, especially aircraft turbines. Recovery of rhenium from superalloy waste is of economic interest because it is a relatively scarce and precious metal. In some special superalloys, rhenium is found in a proportion of up to 6% by weight.

 · Highlights This paper discusses the recovery of rhenium from copper-bearing leach solutions using weakly basic anion exchange resins. Rheium was successfully …

 · Rhenium is recovered during pyrometallurgical processing of molybdenum sulfide and copper sulfide ores; the traditional technology involves removing rhenium (VII) oxide, …

RECOVERY OF RHENIUM FROM A CATALYST SUPPORT. 2285994 - EP09741884B1 - EPO Application May 06, 2009 - Publication Jun 10, 2015 Nabil RIZKALLA Andrzej ROKICKI.

A process for rhenium recovery by the use of an anion exchange resin, characterized in that rhenium is eluted from the rhenium-adsorbed anion exchange resin with a hydrochloric acid solution containing a metal chloride selected from the group consisting of cadmium chloride and zinc chloride. 2. A process for rhenium recovery by the use of an ...

Major part of rhenium production comes from processing of mineral resources. Commonly this metal is recovered as by-product at smelting of copper concentrates or rousting of molybdenite concentrates. Volatile rhenium heptoxide Re 2 O 7 is trapped by off-gas cleaning systems and appears in the sulfuric acid solutions in form of perrhenate anion.

 · Separation of molybdenum and rhenium in an aqueous solution has been demonstrated previously. Fisher and Melache absorbed molybdenum and rhenium from a 1-M NaOH solution with a strong base anion-exchange resin. Molybdenum, was eluted with a 2.5-M NaOH solution, after which rhenium was eluted with a 7-M HCl solution.

 · Figure 5 —USBM SX/EW process flowsheet for rhenium recovery (Churchward and Rosenbaum, 1963). Figure 4 — Flowsheet for the recovery of rhenium from sulfuric acid scrubbing solution (Abisheva ...

There is provided a hydrometallurgical process of recovering rhenium values from mixtures thereof with other metal values in which the rhenium values constitute a minority amount, for example...

 · Recovery of rhenium from molybdenite calcine by a resin-in ：of,by,a,Resin,from,From,resin,,FROM, …

 · There is provided a hydrometallurgical process of recovering rhenium values from mixtures thereof with other metal values in which the rhenium values constitute a minority amount, for example super-alloys, which comprises subjecting the mixture to strongly oxidizing acid conditions, preferably an aqueous mixture of hydrochloric acid and …

The U.S. Department of Energy's Office of Scientific and Technical Information

 · In the chloridizing leaching process using H 2 SO 4 and NaClO 3, the following reactions occur for the bismuth sulfide in the separation residue form recovery process of …

The base mineral raw materials for recovery of rhenium are solid and liquid by-products of molybdenum, copper, lead and uranium production. Therefore, the recovery of rhenium from them is usually carried out by a hydrometallurgical process.3­6) The hydrometallurgical process for the produc-tion of rhenium from the related by-products can be ...

Justia Patents Group Viib Metal (mn, Tc, Or Re) US Patent for Recovery of rhenium Patent (Patent # 4,521,381) Recovery of rhenium . Nov 7, 1984 - GTE Products Corporation. In a process is disclosed for recovering rhenium from tungsten and rhenium bearing material by oxidizing and fusing the starting material, solubilizing the tungsten and ...

the process consists of: (a) adjusting the ph of the relatively impure solution to from about 9.0 to about 10.0 to precipitate impurities contained therein and form a purified tungsten …

 · Rhenium production from copper and molybdenum sulphides involves the use of a pyrometallurgical process. In traditional pyrometallurgy processes, gases emissions produce unacceptable air pollution and damage the extractive metallurgy equipment, leading to high production cost. Due to the environmental disadvantages presented by the …

The Federal Bureau of Mines has successfully demonstrated an electrooxidation-solvent extraction-carbon adsorption process for recovering molybdenum and rhenium from offgrade concentrates. The flow sequence consists of dissolution of metal values by electrooxidation, liquid-solid separation by thickening, acidification and chlorate ion removal ...

OSTI.GOV Patent: RECOVERY OF RHENIUM AND MOLYBDENUM VALUES FROM SOLUTION. RECOVERY OF RHENIUM AND MOLYBDENUM VALUES FROM SOLUTION. Full Record; Other Related Research; Inventors: Litz, J E Publication Date: Sat Jan 01 00:00:00 EST 1972

 · Conditions at which Re2O7 is reduced to rhenium metal by S2 have been identified and key process conditions are outlined to maximize performance of the LSO scheme and rhenium recovery. View Show ...