Stannous oxide powder

Patent metadata

Field	Value
Publication number	US-11772981-B2
Application number	US-201916494021-A
Country	US
Kind code	B2
Filing date	Apr 11, 2019
Priority date	Jul 25, 2018
Publication date	Oct 3, 2023
Grant date	Oct 3, 2023

Abstract

Provided is a stannous oxide powder that can be suitably used for supplying tin ions, and has improved solubility and at the same time has an improved handling property. A stannous oxide powder comprising stannous oxide and inevitable impurities, wherein a content of stannous oxide in a dry mass is 99.9% by mass or more; a specific surface area is from 0.1 to 1.0 m 2 /g; a TAP density is from 2 to 4 g/cm; a 50% particle diameter is from 30 to 60 μm; and an angle of repose is from 10 to 33°.

First claim

What is claimed is:

1. A stannous oxide powder comprising stannous oxide and inevitable impurities, wherein:
a content of stannous oxide in a dry mass is 99.9% by mass or more;
a specific surface area is from 0.1 to 1.0 m 2 /g;
a TAP density is from 2 to 4 g/cm 3 ;
a 50% particle diameter is from 30 to 60 μm; and
an angle of repose is from 10 to 33°;
wherein the stannous oxide powder has each content of Ag, As, Bi, Ca, Cd, Co, Cr, Cu, Fe, In, K, Mg, Mn, Na, Ni, Pb, Th, Tl, U, and Zn of 1 ppm or less, each content of P and S of 10 ppm or less, a content of Cl of 1 ppm or less, and a content of Sb of from 1 to 5 ppm.

2. The stannous oxide powder according to claim 1 , wherein the stannous oxide powder has a chlorine content of 1 ppm or less and a sulfur content of 10 ppm or less.

3. The stannous oxide power according to claim 2 , wherein when 100 g/L of stannous oxide powder is added to a solution having a methanesulfonic acid concentration of 100 g/L, the stannous oxide is dissolved in the solution for 30 seconds or less, and has a turbidity after dissolution of 20 degrees.

4. The stannous oxide power according to claim 1 , wherein when 100 g/L of stannous oxide powder is added to a solution having a methanesulfonic acid concentration of 100 g/L, the stannous oxide is dissolved in the solution for 30 seconds or less, and has a turbidity after dissolution of 20 degrees.

Assignees

• Jx Nippon Mining & Metals Corp
• Jx Metals Corp

Inventors

• Takemoto Koichi

Classifications

• C01G19/02 Primary

  Oxides · CPC title

• C01P2004/61

  Micrometer sized, i.e. from 1-100 micrometer · CPC title

• C01P2006/11

  Powder tap density · CPC title

• C01P2006/12

  Surface area · CPC title

• C01P2006/80

  Compositional purity · CPC title