Method for preparing heavy highly-pure basic cupric carbonate

Abstract

The invention discloses a method for preparing heavy highly-pure basic cupric carbonate. The method takes copper, liquid ammonia and high-purity carbon dioxide as raw materials and includes the following steps: preparing stronger ammonia water firstly, then introducing high-purity carbon dioxide into the stronger ammonia water, controlling the carbonization degree to prepare and obtain carbonated aqueous ammonia; performing the reaction of the carbonated aqueous ammonia and copper under a certain air pressure to obtain a copper ammonia complex solution; and then obtaining the heavy highly-pure basic cupric carbonate through heating, ammonia stilling, separation, washing, drying and sieving. According to the invention, carbon dioxide is directly used and taken as a raw material, heavy metal ions and chloride ions are prevented from being brought in, the reaction speed is improved, the production cycle is shortened, the production efficiency is greatly improved, the product purity is higher, few impurities can be generated, the quality is greatly improved, and the application range of the product is wider. Besides, through the adoption of the method, the yield is high, less heat is emitted, the energy consumption is lower, and the environmental requirement can be better met while the production cost is greatly reduced.

Description

technical field [0001] The invention belongs to the field of production and application of copper carbonate, in particular to a method for preparing heavy high-purity copper carbonate. 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. At present, the commonly used method for producing basic copper carbonate uses copper sulfate, copper chloride or copper nitrate to synthesize b...

AI Technical Summary

Problems solved by technology

At present, the commonly used method for producing 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, high energy consumption, and production The amount of waste water produced 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 process, and the early method of producing basic copper carbonate by the ammonia process is mainly at room temperature Under strict compliance with Cu+(NH 4 ) 2 CO 3 +2NH 3 [o] →Cu(NH 3 ) 4 CO 3 This synthesis principle is carried out, because the volatility of ammonia, low temperature and other reasons cause the reaction time to be long, and it is difficult to obtain basic copper carbonate monomer. Although this method has been improved later, as the patent application number is 92109468.X " A high-efficiency process for producing basic copper carbonate or copper oxide. The process uses a mixture of heated copper material and ammonium bicarbonate solution. The whole process adopts a pressure-swing reaction, and then thermally decomposes at a temperature of 80 ° C to 100 ° C. Then, basic copper carbonate is obtained by washing and drying, but this method has high requirements on the pressure adjustment of the reaction. At the same time, most thermal decomposition devices use reactors to collect basic copper carbonate through coils. First, the pressure change increases the difficulty of production. Second, it is easy to accumulate and scale in the coil, which affects the yield of basic copper carbonate and also easily increases the impurities in the basic copper carbonate, especially iron, thereby affecting the quality of basic copper carbonate