Method for preparing 2-amylanthraquinone by two-step method

A technology for amyl anthraquinone and amyl anthracene, which is applied in the field of preparing 2-amyl anthraquinone by a two-step method, can solve the problems of excessive hydrogenation, hidden dangers in production safety, large equipment corrosion, etc., and achieves mild reaction conditions and reduced production. cost, the effect of reducing production pollution

Active Publication Date: 2018-01-19
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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-amylanthraqui

Method used

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  • Method for preparing 2-amylanthraquinone by two-step method
  • Method for preparing 2-amylanthraquinone by two-step method
  • Method for preparing 2-amylanthraquinone by two-step method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Step 1: In the autoclave, add 100g of anthracene, 50g of isopentene and 0.5g of Mg-MWW molecular sieve, and then add 150ml of solvent. After the autoclave is sealed, replace the air in the autoclave with nitrogen, and then heat the autoclave. At a reaction temperature of 200°C, fill the reactor with nitrogen to a reaction pressure of 2.5Mpa, and stir the reaction at the reaction temperature and pressure. During the reaction, continuously supply nitrogen and maintain a stable reaction pressure; Separation process: After the alkylation reaction is finished, take the reaction kettle out of the heating furnace and cool it to room temperature, reduce the pressure in the reaction kettle to normal pressure, open the lid of the kettle, take out the mixed solution, and carry out vacuum distillation on the mixed solution. Separation of catalyst and product 2-pentyl anthracene and unreacted raw material anthracene; obtain 2-pentyl anthracene;

[0035] The second step: mix the 2-amyl...

Embodiment 2

[0037] The difference from Example 1 is that the yield of 2-amylanthraquinone is 16.1% by replacing the air flow rate of 40 mL / min with the oxygen flow rate of 40 mL / min.

Embodiment 3

[0039] The difference with Example 1 is that the 0.25MnO 2 / 0.1MgO / γ-Al 2 o 3 Catalyst replaced with 0.25MnO 2 / γ-Al 2 o 3 , The yield of 2-amylanthraquinone was 15.5%.

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PUM

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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...

Claims

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Application Information

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IPC IPC(8): C07C46/04C07C50/16C07C2/66C07C15/28
Inventor 王伟建
Owner CHINA PETROLEUM & CHEM CORP
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