Method for producing aqueous solution of perrhenic acid from rhenium sulfide

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

Inactive Publication Date: 2015-01-07
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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  • Method for producing aqueous solution of perrhenic acid from rhenium sulfide
  • Method for producing aqueous solution of perrhenic acid from rhenium sulfide
  • Method for producing aqueous solution of perrhenic acid from rhenium sulfide

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Embodiment

[0087] 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.

[0088] (Verification of the effect by the first roasting)

[0089] 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.).

[0090] 【Table 1】

[0091]

[0092] 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

Provided is a method that enables high-purity perrhenic acid to be produced from crude rhenium sulfide using a dry process. This method for producing an aqueous solution of perrhenic acid includes: 1) a step in which a first roasting is performed on rhenium sulfide in the presence of an oxygen-containing gas, generating rhenium oxide and sulfur oxide, and then gasifying and discharging the sulfur oxide to obtain rhenium oxide as a roasting residue; 2) a step in which a second roasting is performed on the roasting residue in the presence of an oxygen-containing gas, and gasified rhenium oxide is collected; 3) a step in which the gasified rhenium oxide is solidified by cooling, or a step in which an aqueous solution of perrhenic acid is obtained by dissolving the gasified rhenium oxide in water while cooling the gasified rhenium oxide; and 4) and a step in which, if the rhenium oxide was solidified, an aqueous solution of perrhenic acid is obtained either by dissolving the solidified rhenium oxide in water, or by dissolving the solidified rhenium oxide in water after heating and gasifying the solidified rhenium oxide.

Description

technical field [0001] 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 [0002] 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. [0003] As one of the promising raw materials for recovering rhenium industrially, there is crude rhenium sulfide. Examples of impurities in crude rhenium sulfide include zinc, bismuth, and the like. [0004] Conventionally, there is known a method for producing potassium perrhenate from rough rhenium sulfide as described in JP-A-62-148327 (Patent Document 1). In this document, crude rhenium sulfide is oxidized and leached using an o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B61/00C01G47/00C22B1/02C22B3/44C22B5/12
CPCC22B1/02C22B61/00C22B5/12C01G47/00C22B3/44C01P2006/80Y02P10/20
Inventor 隅田育伸河野雄仁浜本真
Owner PAN PACIFIC COPPER CO LTD
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