Method for preparing high-purity basic cupric carbonate by outer-coil internal-stirring type reaction kettle

Abstract

The invention discloses a method for preparing high-purity basic cupric carbonate by an outer-coil internal-stirring type reaction kettle. The method comprises the following steps: taking pure copper, liquid ammonia and high-purity carbon dioxide as raw materials; firstly preparing strong ammonia water; introducing high-purity carbon dioxide into the strong ammonia water to prepare carbonated aqueous ammonia; reacting the carbonated aqueous ammonia with pure copper under a certain air pressure to obtain a copper-ammonia complex solution; and at last utilizing the outer-coil internal-stirring type reaction kettle to prepare the high-purity basic cupric carbonate. The method improves the reaction speed, shortens the production cycle, improves the product purity, greatly improves the production efficiency, lowers the production cost, significantly improves the quality and can be widely used for more products. At the same time, by adoption of the outer-coil internal-stirring type reaction kettle, the yield is high, the heat dissipation is low, the reaction time is short, the coal resource is saved, and the production cost is greatly reduced while the environmental protection requirement is better met.

Description

technical field [0001] The invention belongs to the field of production and application of copper carbonate, and in particular relates to a method for preparing high-purity alkaline copper carbonate by using an internal stirring reactor in an outer coil. Background technique [0002] Basic copper carbonate is a widely used raw material in the chemical industry. It is used in the manufacture of various copper compounds in the inorganic industry, as a catalyst for organic synthesis in the organic industry, as an additive for copper ions in the electroplating industry, and in agriculture. It can be used as a preventive agent for smut, and can also be used as an insecticide for seeds. In animal husbandry, it can be used as an additive to copper in feed. It is also an important medicinal material. In addition, it is also used in pyrotechnics and pigment production. Substitutes for arsenic trioxide. The method commonly used at present to produce basic copper carbonate uses copp...

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Problems solved by technology

The method commonly used at present to produce basic copper carbonate uses copper sulfate, copper chloride or copper nitrate to synthesize basic copper carbonate with sodium carbonate or sodium bicarbonate in a dissolved state, and its disadvantages are long cycle, large energy consumption, and production cost. The amount of waste water is large, the fineness and precision of the product cannot meet the market requirements, and the quality cannot be guaranteed; there are also methods for producing basic copper carbonate by the ammonia method, and the early method of producing basic copper carbonate by the ammonia method is mainly at room temperature Strictly follow Cu+(NH4)2CO3+2NH3[o]→Cu(NH3)4CO3 is carried out. Due to the volatility of ammonia and low temperature, the reaction For a long time, it is difficult to obtain basic copper carbonate monomer. Although this method has been improved later, as the patent application number is 92109468. The mixture of copper material and ammonium bicarbonate solution adopts a pressure-swing reaction in the whole process, and then thermally decomposes at a temperature of 80°C to 100°C, and then obtains basic copper carbonate by washing and drying, but this method does not affect the reaction pressure. The adjustment requirements are high. At the same time, the thermal decomposition device mostly uses a reaction kettle to collect basic copper carbonate through a coil. First, pressure changes increase the difficulty of production. Second, it is easy to accumulate and scale in the coil, which affects the yield of basic copper carbonate. At the same time, it is easy to bring impurities into the basic copper carbonate, especially the increase of iron impurities, thus affecting the quality of basic copper carbonate

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