Preparation of Basic Copper Carbonate with High Crystallinity by Improved Two-Step Precipitation Method
Basic copper carbonate, with the chemical formula Cu2(OH)2CO3, is an important copper salt product. In this article, the process of the second reaction in the preparation of basic copper carbonate using a two-step precipitation method was optimized and adjusted. By combining characterization methods such as XRD and SEM, the two-stage reaction was compared and investigated for different concentrations of acidic and alkaline solutions, alkaline solution distribution ratios, reaction temperatures, and aging conditions. It was ultimately found that the crystallinity of the product was best when using lower concentrations of acid and alkali solutions, with n(Na2CO3):n(NaOH)=1:2 in the alkali solution, lower heating temperature of water bath, and stirring aging method. High crystallinity basic copper carbonate samples were successfully prepared using this modified two-step precipitation method.
Basic copper carbonateMalachiteTwo-step precipitation methodControl of morphologyReactive crystallization
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