Preparation method of efficient palladium-carbon catalyst capable of being used repeatedly

Abstract

The invention discloses a preparation method of an efficient palladium-carbon catalyst capable of being used repeatedly, which specifically comprises the following steps: adding activated carbon into ethanol for ultrasonic cleaning, and carrying out acid and alkali soaking; coating the palladium acetate-acetone solution on the surface of an activated carbon substrate to obtain coated activated carbon; adding hydroxypropyl methyl cellulose and ethyl cellulose into methanol, and distilling to form a slightly thick liquid; then carrying out methanol steam treatment on a coated activated carbon base material, pouring the slightly thick liquid into the coated activated carbon base material under negative pressure, and drying to obtain a prefabricated sealing block; hydrolyzing the prefabricated sealing block in a humid environment to obtain a palladium-carbon prefabricated sealing block; and adding into water, stirring, reducing and washing to obtain the palladium-carbon catalyst. Through modification of a carbon carrier, groups on the surface area of the carrier are enriched, adhesion of a palladium active component is facilitated, and the activity of the catalyst is improved; and through secondary cellulose reinforcement, the skeleton of the carbon carrier is firmer and can resist the external force in the use process, so that the service life of the catalyst is prolonged.

Description

technical field [0001] The invention belongs to the technical field of catalyst preparation methods, and in particular relates to a preparation method of a high-efficiency palladium-carbon catalyst that can be applied mechanically for many times. Background technique [0002] Palladium carbon, as a new type of high-efficiency noble metal catalyst, is the perfect application of new materials in the field of chemical industry. The main functions of palladium carbon catalysts include the realization of hydrogenation, dehydrogenation and hydrogen transposition in chemical reactions, which can be widely used in energy chemical industry, fine chemical industry, environmental protection and other fields. At present, palladium carbon generally has low activity during use, or the active components are buried due to the collapse of the carrier, which leads to fewer times of catalyst application and easy deactivation. Contents of the invention [0003] The purpose of the present inv...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a kind of preparation method of high-efficiency palladium-carbon catalyst that can be applied mechanically many times, which solves the problems that the palladium-carbon catalyst prepared by the existing method has less times of mechanical application and lower activity