What are the main methods for preparing cuprous oxide

The main methods for preparing cuprous oxide are as follows:

Dry method: After removing impurities, the copper powder is mixed with copper oxide, and then sent into the calcining furnace to be heated to 800-900°C to be calcined into cuprous oxide. After taking it out, use a magnet to suck away mechanical impurities, and then pulverize to 325 mesh to obtain a finished cuprous oxide. If copper sulfate is used as the raw material, the copper in the copper sulfate is first reduced with iron, and the subsequent reaction steps are the same as the method using copper powder as the raw material.

Glucose reduction method: the copper sulfate solution is mixed with glucose and then added with sodium hydroxide solution to react to produce cuprous oxide, which is filtered, rinsed, dried and crushed to obtain the cuprous oxide product.

The electrolysis method is in iron: in an electrolytic cell lined with polyvinyl chloride, a cast copper plate is used as an anode, a red copper plate is used as a cathode, potassium chromate is used as an additive, and a salt solution is used as an electrolyte. The sodium chloride is 290～ Under the conditions of 310g/L, potassium chromate 0.3～0.5g/L, temperature 70～90 ℃, pH 8～12, current density 1500 A/m2, electrolysis will produce cuprous oxide, which will be separated by precipitation, rinsed, filtered, Drying produces cuprous oxide.

Hydrazine reduction method: Pour 3～5mL 20% hydrazine aqueous solution into 50mL high-concentration copper acetate aqueous solution to reduce the divalent copper ions. The solution turns green at first and generates nitrogen gas. After a period of time, yellow to orange-yellow cuprous oxide is precipitated. The precipitate was washed with water, ethanol and ether. Because excessive hydrazine can further reduce the cuprous oxide to metallic copper, the amount of hydrazine should not be excessive.

Glucose reduction synthesis method of film solution: 50g copper sulfate pentahydrate and 75g potassium sodium tartrate are respectively dissolved in 200mL cold water, and the two are mixed when the solution is cooled to room temperature. In addition, 75 g of sodium hydroxide was dissolved in 200 mL of water to prepare an alkaline solution. In the case of stirring the mixed solution, slowly add the alkali solution, and be careful to maintain the temperature of the solution, so that the temperature of the solution does not rise, so that the solution turns dark blue. Heat the divalent copper salt solution to a boil, and add 10% glucose solution until the blue color disappears, and red cuprous oxide is precipitated. Then put it in 1L cold water, let it stand for about 15min, discard the supernatant liquid; add water and stir, after decantation, filter with Buchner funnel; wash the precipitate twice with 15mL water, and then wash it with ethanol three times , And finally dry in an air bath.

Direct oxidation of metallic copper: Hang the metallic copper in a vertical tubular electric furnace with platinum wire, and heat it at 1000°C for 24h in a nitrogen atmosphere containing 1% (volume fraction) of oxygen to obtain cuprous oxide. Or the stoichiometric mixture of metallic copper and copper oxide is enclosed in a vacuum tube, and heated at 1000° C. for 5 hours to react to obtain cuprous oxide.

Overview of cuprous oxide Cu2O powder

Cuprous oxide, whose chemical formula is Cu2O, is an oxide of monovalent copper. It is a bright red powdery solid and is almost insoluble in water. It disproportionates to divalent copper and copper element in acidic solution, and gradually oxidizes to black in humid air. Copper oxide. Cuprous oxide is mainly used in the manufacture of antifouling paint on the bottom of ships (used to kill low-level marine animals), insecticides, various copper salts, analytical reagents, red glass, and also used in the preparation of copper plating and copper alloy plating solutions .

Solubility: insoluble in water and alcohol, soluble in hydrochloric acid, ammonium chloride, ammonia, and slightly soluble in nitric acid. Dissolved in hydrochloric acid to produce white cuprous chloride crystalline powder. Meet dilute sulfuric acid and dilute nitric acid to produce copper salt. Will quickly turn blue in the air. It can be dissolved in concentrated alkali, ferric chloride and other solutions.

Application of cuprous oxide Cu2O powder

Cuprous oxide is used to make antifouling paint on the bottom of ships (to kill low-level marine animals). Used as a fungicide, ceramic and enamel coloring agent, red glass coloring agent, and also used in the manufacture of various copper salts, analytical reagents and rectifier electroplating in the electrical industry, crop bactericide and rectifier materials. Cuprous oxide is also commonly used as a catalyst for the synthesis of organic compounds.

1. Suitable for pesticides.

2. Suitable for antibacterial fibers and clothing.

3. Cuprous oxide is also suitable for agricultural fungicides.

4. As a preservative, it is suitable for ship primer to prevent pollution and microorganisms.

5. Used in the manufacture of various copper salts and analytical reagents.

6. Used as a catalyst for organic synthesis.

Copper oxide Cu2O powder price

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Supplier of Cuprous Oxide Cu2O Powder

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