Method for continuously synthesizing benzimidazole compound
A technology for benzimidazole and compound, which is applied in the field of continuous synthesis of benzimidazole compounds, can solve the problems of complicated production operation, high discharge of three wastes, low production efficiency, etc. The effect of product yield
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Embodiment 1
[0040] K / Al was first prepared by equal volume impregnation method 2 o 3 , to 10g specific surface area is 300m 2 g -1 , with an average pore diameter of 8nm and a pore volume of 0.8cm 3 / g, the particle size is 20 mesh Al 2 o 3 Add 8mL of KNO containing 0.5gK dropwise to the carrier 3 solution, impregnated for 8 hours, then dried at 100°C for 8 hours, and then fired at 400°C for 5 hours in an air atmosphere to obtain K / Al 2 o 3 . K / Al 2 o 3 Add 100mL of water, stir, adjust the temperature to 40°C, add 10mL of H 2 PdCl 4 solution (Pd content is 0.04g / mL) and 10mL Cu(NO 3 ) 2 solution (Cu content is 0.05g / mL), kept at 40°C for 5 hours, added KOH solution dropwise to adjust the pH value to 8, kept the solution temperature and stirred for 1.5 hours; filtered, and the filter cake was washed with deionized water until neutral; Vacuum drying at 110°C for 4h; then, calcining at 260°C for 4h, and finally reducing with hydrogen at 260°C for 4h to obtain Cu5wt%-Pd4wt%-K5wt...
Embodiment 2
[0042] Mg / Al was first prepared by equal volume impregnation method 2 o 3 , to 10g specific surface area is 250m 2 g -1 , with an average pore diameter of 6nm and a pore volume of 0.7cm 3 / g, the particle size is 30 mesh Al 2 o 3 Add 7mL of Mg(NO 3 ) 2 solution, impregnated for 16h, then dried at 105°C for 10h, and then calcined at 450°C for 6h in an air atmosphere to obtain Mg / Al 2 o 3 . Mg / Al 2 o 3 Add 100mL of water, stir, adjust the temperature to 60°C, add 10mL of Pd(NO 3 ) 2 solution (Pd content is 0.05g / mL) and 10mL CuCl 2 solution (Cu content is 0.03g / mL), kept at 60°C for 3 hours, then added dropwise (NH 4 ) 2 CO 3 Adjust the pH value of the solution to 9, keep the solution temperature and stir for 2.5h; filter, wash the filter cake with deionized water until neutral; vacuum dry at 100°C for 5h; then, roast at 300°C for 6h, and finally at 300°C Reduction with hydrogen for 5h, that is, the corresponding loading of Cu3wt%-Pd5wt%-Mg2wt% / Al 2 o 3 cataly...
Embodiment 3
[0044] Na / Al was first prepared by equal volume impregnation method 2 o 3 , to 10g specific surface area is 280m 2 g -1 , with an average pore diameter of 12nm and a pore volume of 1.0cm 3 / g, the particle size is 40 mesh Al 2 o 3 Add dropwise 10mL of NaNO containing 0.4gNa to the carrier 3 solution, impregnated for 30h, then dried at 110°C for 12h, and then calcined at 500°C for 3h in an air atmosphere to obtain Na / Al 2 o 3 . Na / Al 2 o 3 Add 100mL of water, stir, adjust the temperature to 70°C, add dropwise 10mL of Pd(C 2 h 3 o 2 ) 2 solution (Pd content is 0.02g / mL) and 10mL Cu(NO 3 ) 2 solution (Cu content is 0.07g / mL), kept at 70°C for 7 hours, added dropwise NaOH solution to adjust the pH value to 10, kept the solution temperature and stirred for 5 hours; filtered, and the filter cake was washed with deionized water until neutral; at 80 Vacuum drying at ℃ for 8h; then, roasting at 350℃ for 8h, and finally reducing with hydrogen at 350℃ for 5h, that is, to ...
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