Novel efficient long-life anthraquinone degradation product regeneration catalyst and preparation method thereof

Abstract

The invention discloses a novel high-efficiency and long-life anthraquinone degradation product regeneration catalyst, which uses activated alumina powder as a raw material, uses metal oxides, metal chlorides and pore-forming agents as auxiliary agents, and then uses a peptizer for kneading and molding , the mass percentage of each component is: activated alumina powder 70%-85%, metal oxide 5%-15%, metal chloride 10%-25%, pore-forming agent 0.5%-4.5%, the present invention also A method for making a regenerated catalyst is disclosed. The regenerated catalyst for anthraquinone degradation products prepared by the method uses activated alumina with a high specific surface area and large pore volume as a raw material, and uses metal oxides, metal chlorides and pore-forming agents as active components ( replace the easily lost caustic alkali in traditional catalysts), achieve high dispersion and long-lasting stable curing of metal oxide active components on the carrier, and obtain a high-activity, long-life regeneration catalyst for anthraquinone degradation products, thereby ensuring its regeneration catalysis Efficiency and durability of activity.

Description

technical field [0001] The invention relates to a catalyst, in particular to a novel high-efficiency and long-life anthraquinone degradation product regeneration catalyst and a preparation method thereof. Background technique [0002] hydrogen peroxide (H 2 o 2 ) is an environmentally friendly basic fine chemical, which is widely used in the fields of medicine, chemical synthesis, environmental protection, papermaking and textiles. The global annual consumption of hydrogen peroxide exceeds 20 million tons (calculated based on 27.5% mass concentration), and my country's annual output has reached 12 million tons, making it the largest producer and consumer in the world. The anthraquinone method is currently the only method for large-scale production of hydrogen peroxide in the world. In the process of preparing hydrogen peroxide by the anthraquinone method, anthraquinone reacts with hydrogen to form hydroanthraquinone and tetrahydrohydroanthraquinone, which are then oxidized...

AI Technical Summary

Problems solved by technology

[0003] At present, the catalysts for the regeneration of anthraquinone degradation products on the market are mainly active components such as NaOH, KOH or corresponding oxides supported by activated alumina carriers, but these active components are easily dissolved into water and lost during use, and the average service life is less than 60 sky

The short life of the catalyst means that the catalyst needs to be constantly updated, which will have the following negative effects: (1) increase the production cost of hydrogen peroxide, deteriorate the product quality, and directly affect the normal production of the device; (2) adsorb a large amount of expensive anthracene in the regenerated catalyst quinone working fluid, and pollute the environment; (3) a large amount of labor is required in the replacement process, which will undoubtedly increase the production cost of hydrogen peroxide; (4) waste the country's precious aluminum resources, therefore, how to prepare highly active and long-lived anthraquinone degradants Regenerated catalyst has always been a hot spot in the hydrogen peroxide industry and a key issue that urgently needs a breakthrough