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Manufacturing method of perrhenic acid aqueous solution from rhenium sulfide

A manufacturing method and technology for aqueous solutions, applied in chemical instruments and methods, rhenium compounds, inorganic chemistry, etc.

Pending Publication Date: 2018-12-25
PAN PACIFIC COPPER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

On this point, although it is described in Patent Document 3 that rhenium sulfide is oxidized to rhenium oxide by roasting, and that rhenium oxide is gasified at a temperature above 150° C. and accumulated in dust, the removal of impurities is still unclear. room for improvement

Method used

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  • Manufacturing method of perrhenic acid aqueous solution from rhenium sulfide
  • Manufacturing method of perrhenic acid aqueous solution from rhenium sulfide
  • Manufacturing method of perrhenic acid aqueous solution from rhenium sulfide

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Embodiment

[0088] Hereinafter, examples of the present invention will be described, but the examples are for the purpose of illustration and are not intended to limit the invention.

[0089] (Verification of the effect by the first roasting)

[0090] Crude rhenium sulfide having the analytical values ​​described in Table 1 was prepared. The content rate of each component was measured by chemical analysis (analyzed by ICP-OES.).

[0091] 【Table 1】

[0092]

[0093] For 500 g of the crude rhenium sulfide, the first firing was carried out for 120 to 140 minutes under various furnace atmosphere temperature conditions, and then the furnace was cooled to room temperature. A kiln is used as the roasting furnace, and air is used as the oxygen-containing gas. In any case, the oxygen equivalent was in the range of 1.9 to 2.2. In addition, it can be seen that when the air is preheated to a predetermined temperature (here, 140° C.) and supplied to the kiln, the temperature of the atmosphere i...

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Abstract

To provide a method which can manufacture highly-pure perrhenic acid using a dry process from crude rhenium sulfide. A manufacturing method of perrhenic acid aqueous solution contains a process of gasifying and discharging sulfur oxide and getting rhenium oxide as burning residual by performing furst burning of rhenium sulfide in presence of oxygen content gas and producing the rhenium oxide and the sulfur oxide; a process of collecting gasified rhenium oxide by performing second burning of the burning residual in presence of the oxygen content gas; a process of cooling and solidifying the gasified rhenium oxide or a process getting a perrhenic acid aqueous solution by dissolving the gasified rhenium oxide in water while cooling with water; and a process of getting the perrhenic acid aqueous solution by dissolving the solidified rhenium oxide in water, or heating and gasifying the solidified rhenium oxide and dissolving it in water, when the rhenium oxide is solidified.

Description

[0001] This application is a divisional application of 201380023732.6. The filing date of the original application is May 24, 2013. The invention title of the original application is a method for manufacturing perrhenic acid aqueous solution from rhenium sulfide technical field [0002] The present invention relates to a method for producing an aqueous perrhenic acid solution from rhenium sulfide. In particular, the invention relates to a process for the production of ammonium perrhenate from rhenium sulfide via perrhenic acid. Background technique [0003] Rhenium is a rare metal that accompanies only molybdenite ore and copper ore, and is an important metal used as an additive element for catalysts, an additive element for thermocouples and superalloys, and a material for high-vacuum electron tubes. [0004] As one of the promising raw materials for recovering rhenium industrially, there is crude rhenium sulfide. Examples of impurities in crude rhenium sulfide include zin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G47/00C22B61/00
CPCC01G47/00C22B1/02C01P2006/80C22B61/00Y02P10/20
Inventor 隅田育伸河野雄仁浜本真
Owner PAN PACIFIC COPPER CO LTD
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