Preparation method of palladium-carbon catalyst

Abstract

The invention discloses a preparation method of a palladium-carbon catalyst, and the method comprises the following steps of: adding metallic elements into palladium, and carrying out mixed reaction on the obtained mixture so as to obtain a palladium alloy; impregnating and reducing the palladium alloy in absorption liquid, taking out the palladium alloy, and drying the palladium alloy so as to obtain a high-dispersible palladium-carbon catalyst. By the way, according to the preparation method of a palladium-carbon catalyst provided by the invention, the preparation process of the novel palladium-carbon catalyst is simple, a precious metal palladium loaded on the palladium-carbon catalyst is distributed in a highly dispersed mode, the distribution thickness is uniform; the catalyst is high in activity, and the number of times of applying is more, therefore, the production cost of the catalyst can be effectively reduced, so that the palladium-carbon catalyst is subjected to large-scale application.

Description

technical field [0001] The invention relates to the field of petrochemical industry, in particular to a preparation method of palladium carbon catalyst. Background technique [0002] Palladium is a member of Group VIII platinum group elements in the fifth period. It is a silver-white transition metal, relatively soft, with good ductility and plasticity, and can be forged, rolled and drawn. Blocky metal palladium can absorb a large amount of hydrogen gas, causing the volume to expand significantly, become brittle and even break into pieces. Palladium is chemically inactive and stable in air and humid environments at room temperature. When heated to 800°C, a palladium oxide film forms on the surface of palladium. Palladium can resist the erosion of hydrofluoric acid, phosphoric acid, perchloric acid, hydrochloric acid and sulfuric acid vapor, but it is easily soluble in aqua regia and hot concentrated sulfuric acid and concentrated nitric acid. Molten sodium hydroxide, sodium...

AI Technical Summary

Problems solved by technology

However, due to the poor mechanical properties of pure palladium, it is easy to oxidize and recrystallize at high temperature, and it is easy to deform and embrittle the palladium tube at low temperature, resulting in a decrease in industrial production activity, a decrease in the number of applications, and an increase in the cost of using the catalyst.