Title:
低α線放出量の酸化第一錫の製造方法
Document Type and Number:
Japanese Patent JP7314658
Kind Code:
B2
Abstract:
What is provided is stannous oxide having an α-ray emission amount of 0.002 cph/cm2 or less after heating in an atmosphere at 100° C. for 6 hours. Tin containing lead as an impurity is dissolved in a sulfuric acid aqueous solution to prepare a tin sulfate aqueous solution, and lead sulfate is precipitated in the aqueous solution and removed. While stirring the tin sulfate aqueous solution from which lead sulfate has been removed, a lead nitrate aqueous solution containing lead having an α-ray emission amount of 10 cph/cm2 or less is added to cause lead sulfate to be precipitated in the tin sulfate aqueous solution, and simultaneously the tin sulfate aqueous solution is circulated while removing the lead sulfate from the aqueous solution. A neutralizing agent is added to the tin sulfate aqueous solution to collect stannous oxide.
Inventors:
Hirotaka Hirano
Yoshihiro Yoshida
Takuma Katase
Yoshihiro Yoshida
Takuma Katase
Application Number:
JP2019125029A
Publication Date:
July 26, 2023
Filing Date:
July 04, 2019
Export Citation:
Assignee:
Mitsubishi Materials Corporation
International Classes:
C01G19/02; C25D21/14
Domestic Patent References:
| JP2007302496A | ||||
| JP3223112A | ||||
| JP11310415A | ||||
| JP2014506554A | ||||
| JP2016074969A |
Foreign References:
| WO2007004394A1 | ||||
| WO2017154740A1 |
Other References:
長倉三郎ほか,岩波 理化学辞典,第5版, ISBN4-00-080090-6,東京:株式会社岩波書店,2004年,p. 1287, 全2頁,特に、050 崩壊定数
Attorney, Agent or Firm:
Masayoshi Suda
Akira Murasawa
Akira Murasawa