Process for suspended hydrogenating of anthraquinone compound

A compound and process technology, applied in the directions of peroxides/peroxyhydrates/peroxyacids/superoxides/ozone oxides, inorganic chemistry, chemical instruments and methods, etc., which can solve the problem of low separation efficiency between catalysts and working fluids , not optimization and other issues, to achieve the effect of high catalyst utilization, uniform distribution, and rapid heat transfer

Active Publication Date: 2013-12-18
CHINA TIANCHEN ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the process is not optimal as a whole, and there is a problem that the separation efficiency of the catalyst and the working fluid is not high

Method used

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  • Process for suspended hydrogenating of anthraquinone compound

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Effect test

Embodiment 1

[0027] The evaluation device is a small full-process hydrogen peroxide production device, and the hydrogenation process is a suspended bed anthraquinone hydrogenation process. figure 1 Shown. The size of the suspended bed hydrogenation tower is φ200×3000mm, and the size of the sedimentation bed is φ150×2000mm. The catalyst is alumina microspheres supporting active metal palladium. The average particle size of the catalyst is 150μm, the palladium loading is 1%, and the working fluid system is heavy aromatic hydrocarbon + trioctyl phosphate + 2-ethylanthraquinone + tetrahydro2- Ethyl anthraquinone, in which the volume ratio of heavy aromatics to trioctyl phosphate is 3:1, the mass ratio of 2-ethylanthraquinone to tetrahydro-2-ethylanthraquinone is 1:1, and the effective anthraquinone concentration is 120g / L, the concentration of the catalyst in the working fluid is 0.5wt%. Hydrogenation reaction process conditions: hydrogenation reaction temperature 60℃, hydrogenation tower top...

Embodiment 2

[0029] The evaluation device is a small-scale full-process hydrogen peroxide production device, and the hydrogenation process is a suspended bed anthraquinone hydrogenation process as shown in the figure. The size of the suspended bed hydrogenation tower is φ100×5000mm, and the size of the sedimentation bed is φ150×4000mm. The catalyst is a silica microsphere supported active metal palladium catalyst, the average particle size of the catalyst is 100μm, the palladium loading is 1%, and the working fluid system is heavy aromatics + tetrabutylurea + 2-ethylanthraquinone + tetrahydro 2 -Ethylanthraquinone, where the volume ratio of heavy aromatics to tetrabutylurea is 1:1, the mass ratio of 2-ethylanthraquinone to tetrahydro-2-ethylanthraquinone is 3:1, and the effective anthraquinone concentration It is 120g / L, and the concentration of the catalyst in the working fluid is 0.5wt%. Hydrogenation reaction process conditions: the hydrogenation reaction temperature is 50℃, the reactio...

Embodiment 3

[0031] The evaluation device is a small-scale full-process hydrogen peroxide production device, and the hydrogenation process is a suspended bed anthraquinone hydrogenation process as shown in the attached drawing. The size of the suspended bed hydrogenation tower is φ500×15000mm, and the size of the sedimentation bed is φ100×3000mm. The catalyst is a catalyst with alumina microspheres supporting active metal platinum, the average particle size of the catalyst is 180μm, the palladium loading is 0.5%, and the working fluid system is heavy aromatic hydrocarbon + trioctyl phosphate + 2-ethylanthraquinone + tetrahydro2- Ethyl anthraquinone, in which the volume ratio of heavy aromatics to trioctyl phosphate is 3:1, the mass ratio of 2-ethylanthraquinone to tetrahydro-2-ethylanthraquinone is 1:1, and the effective anthraquinone concentration is 120g / L, the concentration of the catalyst in the working fluid is 0.5wt%. Hydrogenation reaction process conditions: hydrogenation reaction ...

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Abstract

The invention relates to a process for suspended hydrogenating of an anthraquinone compound. The process comprises the following specific steps that a working solution containing alkyl anthraquinone and a powdered suspended bed catalyst are sufficiently mixed in a working station preparation kettle, and the mixture is pumped into a suspended bed hydrogenation tower through a pump, wherein the working solution in the tower is mixed with the hydrogen and moves upwards at a certain speed; a hydrogenated liquid flows out from the top of a suspended bed and enters a gas-liquid separator, and unreacted hydrogen is discharged from the top end of the gas-liquid separator and is mixed with new hydrogen to enter the bottom of the hydrogenation tower; a hydrogenated liquid containing the catalyst is discharged from the bottom of the gas-liquid separator and enters a settling tower, the catalyst in the settling tower drops to the bottom of the tower, the working solution containing a large amount of catalyst is pumped into the preparation kettle through a mud pump, and a clarified hydrogenated liquid at the upper part of the settling tower passes through a filter; the hydrogenated liquid is filtered and then enters a subsequent oxidation process. According to the process for hydrogenation of the anthraquinone, the catalyst is uniformly distributed in the reactor, the utilization rate of the catalyst is high, the gas-liquid heat transfer speed is high, the hydrogenation efficiency is high, the space time yield is stable and the like.

Description

Technical field [0001] The invention relates to a hydrogenation process of an anthraquinone compound in a suspended bed, and the hydrogenation product of the process can be used for the production of hydrogen peroxide. Background technique [0002] Hydrogen peroxide is an aqueous solution of hydrogen peroxide. Because of its non-polluting characteristics during use, it is called the cleanest oxidant. At present, hydrogen peroxide is mainly used to prepare products such as bleaching agent, disinfectant, deoxidizer, polymer initiator and crosslinking agent, and is widely used in papermaking, textile, medicine, environmental protection and other industries. In recent years, my country's hydrogen peroxide industry has developed rapidly, and its production capacity has grown at a rate of 15% per year. The current national production capacity has exceeded 5 million tons / year (calculated at a concentration of 27.5%). In addition, with the rapid promotion of hydrogen peroxide in various...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B15/023
Inventor 史文涛钱震左宜赞石华王海国张舜光刘俊生马国栋耿玉侠
Owner CHINA TIANCHEN ENG
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