Method for preparing copper-aluminium hydrotalcite

The invention relates to a method for preparing copper-aluminium hydrotalcite. The method comprises the main steps as follows: (1) in a conical flask, aluminum sulfate solution and basic cupric carbonate are used for preparing a mixed liquor, an aluminium/copper molar ratio of which is from 1:1 to 1:50, and the pH of the mixed liquor is regulated to 6.8 to 7.2; (2) the conical flask is put onto amagnetic stirrer, and the solution is kept in a suspended state to continuously react for 30 to 40 days; (3) the pH of the suspension is regulated from 6.8-7.2 to 8.5-9.5, solid-liquid separation is carried out after sufficient stirring, and a solid phase is collected; (4) a solid-phase separated matter is cleaned and dried, so that Cu6Al(OH)16CO3.4H2O is obtained. When used for preparing the Cu6Al(OH)16CO3.4H2O, the method disclosed by the invention is easy to operate, and a preparation process is simplified. 种制备铜铝水滑石的方法，主要步骤为：1)用硫酸铝溶液和碱式碳酸铜在锥形瓶中配制铝/铜摩尔比为1:1-1:50的混合液，调节混合液的pH为6.8-7.2；2)将锥形瓶放在磁力搅拌器上，使溶液保持悬浮状态，持续反应30-4