Title:
高濃度スルホン酸錫水溶液及びその製造方法
Document Type and Number:
Japanese Patent JP6773241
Kind Code:
B2
Abstract:
The present invention provides a high-concentration tin sulfonate aqueous solution, in which a divalent tin ion (Sn2+) concentration is 360 g/L to 420 g/L, a tetravalent tin ion (Sn4+) concentration is 10 g/L or less, a free methanesulfonic acid concentration is 40 g/L or less, a Hazen unit color number (APHA) is 240 or less, and a turbidity is 25 FTU or less. This aqueous solution is produced such that stannous oxide powder whose temperature is adjusted to a temperature of 10°C or lower is added to an aqueous methanesulfonic acid solution having a concentration of 60% by mass to 90% by mass when the aqueous solution circulates in a state of being maintained at the temperature of 10°C or lower, and the stannous oxide powder is dissolved.
Inventors:
Koji Tatsumi
Kyohei Mineo
Hirotaka Hirano
Kyohei Mineo
Hirotaka Hirano
Application Number:
JP2020018835A
Publication Date:
October 21, 2020
Filing Date:
February 06, 2020
Export Citation:
Assignee:
Mitsubishi Materials Corporation
International Classes:
C25D3/30; C25D21/14
Domestic Patent References:
| JP2013227641A | ||||
| JP11152595A | ||||
| JP741999A |
Attorney, Agent or Firm:
Masayoshi Suda
Akira Murasawa
Akira Murasawa