Molten metal oxidation-resistant chelating reducer

Abstract

The invention belongs to a molten metal oxidation-resistant chelating reducer used for manufacturing electronic products. The molten metal oxidation-resistant chelating reducer comprises polyoxyethylene nonyl phenyl ether phosphate, ammonium biphosphate and hydroxyl ammonium succinate, and comprises the following parts by weight: 55-95 parts of the polyoxyethylene nonyl phenyl ether phosphate, 10-40 parts of the ammonium biphosphate and 2-10 parts of the hydroxyl ammonium succinate. The molten metal oxidation-resistant chelating reducer has the beneficial effects of high reduction efficiency,being nontoxic, no carcinogen, little smoke, and no corrosion to machines due to neutral pH value. The reducer also can help remove excess metals and oxidation impurities released on tin surface froma tin furnace to play the role of purification; and the reducer can react with a carbonizing soldering flux in a high-temperature furnace, thus further improving reduction effect and releasing metallic elements. The reducer has the advantages of being capable of further improving electronic industry quality, saving energy and reducing consumption, and being safe, efficient and convenient.

Description

【Technical field】 [0001] The invention relates to a molten metal anti-oxidation chelating reducing agent, which belongs to a chemical chelating reducing agent, in particular to a molten metal anti-oxidizing chelating reducing agent used in the manufacture of electronic products. 【Background technique】 [0002] Molten metals are often used in the manufacture of electronic products. Molten metals (or alloys) will be oxidized when they encounter air, melted and oxidized in a high-temperature furnace, and continue to circulate in the furnace, the oxidation speed will be accelerated, and the amount of oxidized metal will increase. It will increase, and the oxide will contain carbonized flux that contains a lot of tin, and it will accumulate and float on the tin surface to affect the flow of tin and the quality of tin on the surface, so it can only be salvaged. After the tin slag is salvaged, the height of the tin surface will be reduced, so tin strips should be added frequently. ...

AI Technical Summary

Problems solved by technology

In order to solve the above problems, reducing powder is often used in the prior art. Due to the raw material composition of molten metal reducing powder, this type of reducing powder has the following defects: poisonous, low reduction rate; because there is strong acid in the ingredients, most of them are strong acids Strong alkali is corrosive to the machine, and the smoke is large

In addition, there is also a type of molten metal reducing agent. This type of reducing agent is also toxic. It contains carcinogens and is irritating to the human body. The smoke has a strong smell and is corrosive to the machine. The residue is gelatinous and difficult to clean. Defects that do not meet environmental protection standards and are very expensive

In the prior art, there is also the use of a molten metal reduction machine. This solution has the following problems: the quality of the molten metal itself after reduction is poor, and it consumes electricity, manpower management and space placement.

In addition, the chelating effect of the current antioxidant chelating reducing agent is not obvious, so that the metal content of the recycled tin sludge is relatively high, so that the oxide content in the tin water increases, and the processed product will produce empty welding, which will affect the quality of the processed product