Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
METHOD FOR RECOVERING SCANDIUM
Document Type and Number:
WIPO Patent Application WO/2016/151959
Kind Code:
A1
Abstract:
Provided is a method for recovering scandium, which enables easy and efficient recovery of high-quality scandium from an acidic solution containing scandium. According to this method for recovering scandium, an acidic solution containing scandium is used and a scandium dissolution liquid after purification is obtained by a double sulfate precipitation step including the steps [A]-[C] described below, and scandium is then recovered from the thus-obtained scandium dissolution liquid. [A] A precipitation step wherein sodium sulfate is added into the acidic solution containing scandium, so that a precipitate of a scandium double sulfate is obtained [B] A neutralization step wherein pure water is added to the precipitate of a scandium double sulfate obtained in the precipitation step so as to dissolve the precipitate of a scandium double sulfate therein, and scandium hydroxide is obtained by adding a neutralizing agent into the thus-obtained dissolution liquid [C] A re-dissolution step wherein an acid is added to the scandium hydroxide obtained in the neutralization step, so that a scandium dissolution liquid after purification, in which the scandium hydroxide is dissolved, is obtained

Inventors:
NAGAI, Hidemasa (C/O Niihama Research Laboratories, SUMITOMO METAL MINING CO. LTD., 17-5, Isoura-cho, Niihama-sh, Ehime 02, 〒7920002, JP)
KUDO, Keiji (C/O Niihama Research Laboratories, SUMITOMO METAL MINING CO. LTD., 17-5, Isoura-cho, Niihama-sh, Ehime 02, 〒7920002, JP)
MATSUMOTO, Shin-ya (C/O Niihama Research Laboratories, SUMITOMO METAL MINING CO. LTD., 17-5, Isoura-cho, Niihama-sh, Ehime 02, 〒7920002, JP)
KOBAYASHI, Hiroshi (C/O Niihama Research Laboratories, SUMITOMO METAL MINING CO. LTD., 17-5, Isoura-cho, Niihama-sh, Ehime 02, 〒7920002, JP)
ASANO, Satoshi (C/O Niihama Research Laboratories, SUMITOMO METAL MINING CO. LTD., 17-5, Isoura-cho, Niihama-sh, Ehime 02, 〒7920002, JP)
Application Number:
JP2015/084409
Publication Date:
September 29, 2016
Filing Date:
December 08, 2015
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
SUMITOMO METAL MINING CO., LTD. (11-3, Shimbashi 5-chome Minato-k, Tokyo 16, 〒1058716, JP)
International Classes:
C22B59/00; C22B3/08; C22B3/24; C22B3/44
Foreign References:
JPS5489904A1979-07-17
JP2014218719A2014-11-20
JP2004175652A2004-06-24
Attorney, Agent or Firm:
SHOBAYASHI, Masayuki et al. (Sapia Tower, 1-7-12 Marunouchi, Chiyoda-k, Tokyo 05, 〒1000005, JP)
Download PDF: