Title:
METHOD FOR SEPARATING RHENIUM AND ARSENIC, AND METHOD FOR PURIFYING RHENIUM
Document Type and Number:
WIPO Patent Application WO/2013/129130
Kind Code:
A1
Abstract:
The purpose of the present invention is to obtain rhenium with low-grade arsenic in a stable manner by separating and removing arsenic, as an impurity, in a stable state from raw materials containing rhenium and arsenic, and reducing the amount of arsenic circulating in a rhenium purification process. The present invention pertains to a method for separating rhenium and arsenic in a rhenium purification process in which: raw materials containing rhenium and arsenic are leached by oxidation, and separated into a leachate containing a perrhenate, arsenic acid and arsenous acid, and arsenate-containing leach residue; and rhenium from the leachate is purified. An alkali is then added to the leachate to obtain an arsenic-containing precipitate and a rhenium-containing solution; the rhenium is separated from the rhenium-containing solution that was obtained; an arsenic-containing solution and a hydroxide precipitation are obtained by adding an alkali to one or both of the arsenic-containing precipitate and arsenate-containing leach residue that were obtained, and the arsenic in the arsenic-containing solution that was obtained is fixed as a precipitate.
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Inventors:
ASANO SATOSHI (JP)
KUBOTA NAOKI (JP)
TAKEDA KAZUNORI (JP)
KOMORI SHINTAROU (JP)
KUBOTA NAOKI (JP)
TAKEDA KAZUNORI (JP)
KOMORI SHINTAROU (JP)
Application Number:
PCT/JP2013/053634
Publication Date:
September 06, 2013
Filing Date:
February 15, 2013
Export Citation:
Assignee:
SUMITOMO METAL MINING CO (JP)
ASANO SATOSHI (JP)
KUBOTA NAOKI (JP)
TAKEDA KAZUNORI (JP)
KOMORI SHINTAROU (JP)
ASANO SATOSHI (JP)
KUBOTA NAOKI (JP)
TAKEDA KAZUNORI (JP)
KOMORI SHINTAROU (JP)
International Classes:
C22B61/00; C22B3/04; C22B3/44; C22B30/04
Foreign References:
| JP2011058016A | 2011-03-24 | |||
| JPH0770665A | 1995-03-14 | |||
| JP2010077499A | 2010-04-08 | |||
| JP2009242935A | 2009-10-22 | |||
| JPH07286221A | 1995-10-31 | |||
| JP2011058016A | 2011-03-24 | |||
| JP2008105921A | 2008-05-08 |
Other References:
See also references of EP 2792758A4
Attorney, Agent or Firm:
KOIKE, Akira et al. (JP)
Akira Koike (JP)
Akira Koike (JP)
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Claims:
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