Method for continuously producing copper oxide

Abstract

The invention discloses a method for continuously producing copper oxide, belongs to the technical field of metal oxide preparation, and aims to provide a method for continuously producing the copperoxide with low energy consumption and high conversion efficiency. The technical key points of the method sequentially include the following steps: continuously introducing a copper-containing solutionand an alkali solution into a tubular reactor according to a mol ratio of 2: 1-1.3, reacting in the tubular reactor under the condition of pH value of 8-14 to obtain a copper hydroxide-containing solution, and using reaction heat to raise the temperature of the solution to partially decompose the solution into the copper oxide; continuously heating to raise the reaction temperature to 60-95 DEG Cfor further decomposing copper hydroxide into the copper oxide, and controlling the length of a reaction tube and the flow rate of the reaction solution to control the granularity of the copper oxideproduct; and separating the reacted product mixture by a continuous centrifuge to obtain the copper oxide.

Description

technical field [0001] The invention discloses a method for producing copper oxide, in particular, a method for continuously producing copper oxide, which belongs to the technical field of metal oxide preparation. Background technique [0002] Copper oxide is the raw material for the manufacture of copper compounds, and is widely used in copper smelting, electroplating, rayon, ceramic and enamel colorants, petroleum desulfurizers, insecticides, catalysts, colored glass and other fields, and has a large market demand. [0003] Chinese patent ZL201710404654.4 discloses a preparation method of copper oxide, which includes the following steps: a. using a strong base to configure the first dispersion; b. adding a copper source to the first dispersion, and at the first temperature After reacting for a period of time, reacting at a second temperature for a period of time, the first temperature is lower than the second temperature; c. and beating, washing and drying to produce coppe...

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Problems solved by technology

[0003] Chinese patent ZL201710404654.4 discloses a preparation method of copper oxide, which includes the following steps: a. using a strong base to configure the first dispersion; b. adding a copper source to the first dispersion, and at the first temperature After reacting for a period of time, reacting at a second temperature for a period of time, the first temperature is lower than the second temperature; c. and beating, washing and drying to produce copper oxide, the chlorine content in the copper oxide is less than 30ppm , but this method consumes a lot of energy

[0004] Chinese patent ZL201710404654.4 discloses a preparation method of copper hydroxide or copper oxide, using soluble copper-containing ions (copper nitrate, copper chloride, copper sulfate) produced in the production of circuit boards as raw materials and alkaline copper chloride ammonia Ions or sodium hydroxide are synthesized to generate basic copper salts (basic copper nitrate, basic copper sulfate, basic copper chloride), and then the basic copper salt products are reacted with sodium hydroxide to generate copper hydroxide or copper oxide, and Adding glycerin as a stabilizer, the product produced by this method is a mixture of copper hydroxide and copper oxide, which needs to be separated later, and continuous production cannot be achieved, which requires a lot of human resources

The present invention uses acidic etching waste liquid as a raw material, and prepares copper hydroxide by purifying and removing impurities, synthesizing basic copper chloride intermediate, reacting basic copper chloride and ammonia water, and converting copper hydroxide into copper oxide in a hot alkali solution. Then wash, dry, and calcinate to obtain active copper oxide powder. The prepared active copper oxide powder has higher purity and lower impurity content, but this method also consumes a lot of energy, and there is no way to realize continuous production.

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