Anthraquinone hydrogenation non-uniform pore channel partition nickel-based monolithic catalyst

Abstract

The invention discloses an anthraquinone hydrogenation non-uniform pore channel partition nickel-based monolithic catalyst and a preparation method thereof. The catalyst consists of a nickel-based monolithic catalyst carrier and a noble metal component, wherein the noble metal component is one or more of palladium, platinum, rhodium and ruthenium; and based on the weight of the catalyst, the catalyst comprises 0.05 to 2 percent, preferably 0.1 to 1 percent, of noble metal component and the balance of the catalyst carrier. The preparation method comprises the following steps: (1) mixing and kneading activated nickel oxide, adhesive and a peptizing agent into plastic paste, putting the paste into a compression die, performing strip extrusion to form a non-uniform pore channel monolithic structure, drying and roasting, and cutting out the required height in the direction vertical to the pore channel to obtain a nickel-based monolithic catalyst carrier containing molybdenum oxide; and (2) dipping one end of the nickel-based monolithic catalyst carrier into a solution containing the noble metal component, performing dipping treatment, and drying and roasting to obtain the catalyst product. The catalyst has the non-uniform pore channel, is applied to hydrogenation process of preparation of hydrogen peroxide by an anthraquinone method, guarantees the reaction activity of the catalyst and improves the reaction selectivity.

Description

technical field [0001] The invention belongs to the field of catalyst preparation, and in particular relates to an anthraquinone hydrogenation non-uniform pore partitioned nickel-based monolithic catalyst. Background technique [0002] Hydrogen peroxide, also known as hydrogen peroxide, is an important chemical raw material, which has been produced in industry as early as the middle of the 19th century, and is one of the main basic chemical products in the world. With the growth of social demands, especially the increasing importance of ecological environment protection, hydrogen peroxide has become an important chemical. As an oxidizing agent, bleaching agent, disinfectant, polymer initiator and crosslinking agent, it is widely used in papermaking, textile, chemical synthesis, military industry, electronics, food processing, medicine, cosmetics, environmental protection, metallurgy and many other fields . Since hydrogen peroxide decomposes to produce water and oxygen, it ...

AI Technical Summary

Problems solved by technology

The hydrogen efficiency of the catalyst has been significantly improved, but there are still shortcomings such as many preparation steps, large amount of noble metals and low catalyst selectivity.

[0010] Generally used monolithic catalysts have a uniform pore size structure, that is, during the reaction, the flow rate of the reactant in the pore is constant, but as the reaction progresses, the

Images