铜铬类水滑石的表征及其催化性能

The CuCr-Hydrotalcite-like Compounds were synthesized by co-precipitation method. The samples were characterized by XRD, FTIR and N₂-adsorption/desorption measurements. The catalytic performance of the material synthesized was evaluated for the synthesis of benzion methyl ether with benzaldehyde and methanol. The result show that well crystallized hydrotalcites are obtained when n_Cu/n_Cr molar ratio is 2.0 and final value of pH is 4.3±0.2. The crystal shape is remained the same while crystallinity, surface area, pore structure and activity vary with the molar ratio of Cu to Cr. The catalytic activity is the best when the molar ratio of Cu to Cr is 2.0 at 50 ℃ andreaction time is 90 min. The highest conversion of benzaldehyde could reach 89.56％,while the selectivity of benzoin methyl ether is nearly 100％.