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A process for suspension hydrogenation of anthraquinone compounds

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: 2016-01-20
CHINA TIANCHEN ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • A process for suspension hydrogenation of anthraquinone compounds

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Embodiment 1

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

Embodiment 2

[0029]The evaluation device is a small-scale full-process hydrogen peroxide production device, and the hydrogenation process is a suspension bed anthraquinone hydrogenation process, as shown in the attached figure. The size of the suspended bed hydrogenation tower is φ100×5000mm, and the size of the settled bed is φ150×4000mm. The catalyst is silica microspheres loaded with active metal palladium, the average particle size of the catalyst is 100 μm, the palladium load is 1%, and the working fluid system is heavy aromatics + tetrabutylurea + 2-ethylanthraquinone + tetrahydro 2 - Ethylanthraquinone, wherein the volume ratio of heavy aromatics and tetrabutylurea is 1:1, the mass ratio of 2-ethylanthraquinone and tetrahydro 2-ethylanthraquinone is 3:1, the concentration of effective anthraquinone is 120g / L, and the concentration of the catalyst in the working solution is 0.5wt%. Hydrogenation reaction process conditions: hydrogenation reaction temperature 50°C, hydrogenation towe...

Embodiment 3

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

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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 process for hydrogenating anthraquinone compounds in a suspended bed, and the hydrogenated 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. It is known as the cleanest oxidant because of its non-polluting characteristics during use. 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. At present, the national production capacity has exceeded 5 million tons per year (calculated at a concentration of 27.5%). In addition, with the rapid promotion of hydrogen peroxid...

Claims

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Application Information

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Patent Type & Authority Patents(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