Method for preparing 2-amylanthraquinone by two-step method

Abstract

The invention discloses a method for preparing 2-amylanthraquinone by a two-step method. The method comprises a first step alkylation process (anthracene and isoamylene perform alkylation reaction under the effect of catalysts to produce 2-amylanthraquinone) and a second step oxidization process (2-amylanthraquinone takes oxidization reaction under the effects of catalysts to produce 2-amylanthraquinone; solid-state catalysts are selected to take multi-phase reaction; catalysts can be cyclically used through regeneration). The atom utilization rate reaches 100 percent; the raw material utilization rate is improved; the waste pollution is reduced; the anthracene and the isoamylene are used as raw materials; the solid-catalysts are preferably selected to be used as solid catalysts; the repeated cyclic utilization is realized; the production cost of the 2-amylanthraquinone is obviously reduced. The 2-amylanthraquinone is prepared by the two-step method; the method is simple; the reactionconditions are mild; the production pollution is obviously reduced; the oxygen gas is preferably selected to be used as oxidizing agents, so that the cost is lower; the application prospects are wider.

Description

technical field [0001] The invention relates to the technical field of 2-amylanthraquinone production, more specifically, the invention relates to a two-step method for preparing 2-amylanthraquinone. Background technique [0002] With the development of industries such as caprolactam and propylene oxide, H 2 o 2 As a green oxidant, the demand is gradually increasing. The anthraquinone method is currently the main method for the industrial production of hydrogen peroxide. The traditional anthraquinone process generally chooses ethyl anthraquinone as the carrier of the working fluid. The solubility of 2-ethyl anthraquinone in the working fluid is low. In order to produce hydrogen peroxide with high hydrogen efficiency, it is easy to cause excessive hydrogenation and produce more The degraded products cannot be recycled. 2-Amylanthraquinone is used as the carrier of the new working fluid. Due to its high solubility and the ability to produce hydrogen peroxide with high hydr...

AI Technical Summary

Problems solved by technology

The traditional anthraquinone process generally chooses ethyl anthraquinone as the carrier of the working fluid. The solubility of 2-ethyl anthraquinone in the working fluid is low. In order to produce hydrogen peroxide with high hydrogen efficiency, it is easy to cause excessive hydrogenation and produce more degradation products, cannot be recycled

2-Amylanthraquinone is used as the carrier of the new working fluid. Due to its high solubility and the ability to produce hydrogen peroxide with high hydrogen efficiency, the degradation products produced are relatively small. Since there is no domestic manufacturer of 2-Amylanthraquinone, it is necessary to Imported, the price is much higher than that of 2-ethylanthraquinone, which limits the popularity of 2-amylanthraquinone as a carrier of working fluid in domestic manufacturers of hydrogen peroxide

[0003] There are few documents on the preparation of 2-amylanthraquinone by oxidation of 2-amylanthracene, one of which is the US patent Sugano J, Kuriyama Y, Ishiuchi Y, et al. Process for producing quinones: The United States, US3953482[P]. 1976-04-27 [Z], the method disclosed in this patent is to use 35% hydrochloric acid as a catalyst, 60% H 2 o 2 As a catalytic oxidant, because high-concentration hydrogen peroxide is used as an oxidant, it brings hidden dangers to industrialized safe production; in addition, hydrochloric acid is used as a catalyst, which corrodes equipment and is not suitable for larger industrial applications, so this method has not been industrialized. application

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