Preparation process of copper-based catalyst

The invention discloses a preparation process of a copper-based catalyst. Hydroxyethyl cellulose is added as a pore forming agent when raw materials are smashed, and then, granulation is carried out. The preparation process comprises the steps of weighing the raw materials; placing the weighed fine granulated raw materials into a reaction tank; adding deionized water into the reaction tank to dissolve the raw materials; adding sodium carbonate into the reaction tank, and stirring; settling; standing; washing; carrying out vacuum filtration; drying the filtered sediment by using a drying oven; firing the dried solid substance by using a muffle furnace; adding graphite, pseudo-boehmite and the hydroxyethyl cellulose into the solid substance, and then, smashing by using a smasher; adding deionized water, and blending in a tray; prepressing the materials by using a prepress; granulating by using a granulator; drying the granules formed by using the granulator; forming by tabletting the dried granules by using a tablet press; and firing in the muffle furnace. By using the preparation process, the stacking density of the prepared granules can be reduced, the weight of the catalyst can be reduced, and the production cost of the catalyst can be lowered.