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Stannous oxide and method for producing same

A technology of tin monoxide and a manufacturing method, applied in the directions of tin oxide, chemical instruments and methods, and chemical methods for reacting liquids with liquids, etc., can solve problems such as difficulty in reducing chloride ions or sulfate ions, and achieve excellent solubility. Effect

Pending Publication Date: 2020-04-10
JX NIPPON MINING & METALS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this technique has a disadvantage that it is difficult to sufficiently reduce chloride ions or sulfate ions derived from the tin solution used as a raw material in the produced tin monoxide.

Method used

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  • Stannous oxide and method for producing same
  • Stannous oxide and method for producing same
  • Stannous oxide and method for producing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0105] [production of tin monoxide]

[0106] Add 1L of ammonium bicarbonate aqueous solution with a concentration of 100g / L to a 3L beaker, heat and keep it at 65-70°C, and add tin concentration of 80g / L to the aqueous ammonium bicarbonate solution dropwise over 2 hours while stirring with a stirrer. 1 L of stannous sulfate solution, and neutralization reaction (first stage). After the reaction, the temperature was further raised to 75 to 80° C. and maintained for 1 hour (second stage). The temperature during the reaction is divided into two stages, the first stage and the second stage, and maintained for a specific time as described above. During the neutralization reaction, ammonium bicarbonate solution was added to adjust the pH value. The details of the conditions are summarized in Table 1. Thus, particulate tin monoxide was obtained. The reaction formula of this neutralization reaction is shown below:

[0107] SnSO 4 +2(NH 4 )HCO 3 →SnO+(NH 4 ) 2 SO 4 +H 2 O+2...

Embodiment 2～6

[0120] Examples 2-6 were performed by the same procedure as Example 1. The details of the conditions are summarized in Table 1. In Examples 2, 5, and 6, carbon dioxide was blown while injecting an ammonium bicarbonate aqueous solution. In Example 2, ammonia water was further added while throwing in the ammonium bicarbonate aqueous solution. The obtained particulate tin monoxide was evaluated in the same manner as in Example 1. The same applies to the solubility test. The obtained results are collectively shown in Table 1. Regarding Example 4, a photograph of the appearance of the solution at the point in time when the dissolution was judged to be complete is shown as Figure 1A .

[0121] [SEM image]

[0122] The obtained particulate tin monoxide was observed by SEM (Hitachi High-Technologies Co., Ltd., electron microscope S-3000N). Regarding Example 4, a photograph of the obtained SEM image is shown as Figure 1B .

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Abstract

Provided is a method for producing stannous oxide, comprising a step for subjecting stannous sulfate to neutralization in an aqueous solution using ammonium carbonate or ammonium bicarbonate, and thereby precipitating stannous oxide. This production method is a novel means for producing stannous oxide in which chlorine, sulfur, sodium, and potassium are sufficiently reduced, and which has excellent solubility.

Description

technical field [0001] The present invention relates to a kind of tin oxide and its preparation method. Background technique [0002] When performing tin plating, there are cases where an insoluble electrode (platinum, noble metal oxide, etc.) is used as an anode instead of metallic tin. At this time, tin monoxide is often added to replenish tin ions consumed from the electrolytic solution. Tin monoxide (SnO) and tin dioxide (SnO 2 ) is faster than the dissolution rate, and it is easy to make a replenishment solution. [0003] In order to produce soluble tin oxide, it has been considered ideal to use tin chloride as the starting material. Therefore, for example, Patent Document 1 (Japanese Patent No. 6095929) discloses a technique for producing tin monoxide using stannous chloride as a raw material. However, this technique has a disadvantage that it is difficult to sufficiently reduce chlorine, which is an impurity contained in the produced tin monoxide. Therefore, for ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G19/02
CPCC01G19/02C01P2004/03C01P2004/61C01P2004/51C01P2006/11C01P2006/12C01P2006/82C01P2006/80C25D3/30C01P2004/62C25D17/10B01J19/0086B01J14/00B01J19/0013B01J19/0006
Inventor 竹本幸一伊森彻
Owner JX NIPPON MINING & METALS CORP
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