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2-EAQ (2-ethylanthraquinone) synthesis device and technology

An ethyl anthraquinone and synthesis device technology, applied in the field of anthraquinone derivatives synthesis device, can solve the problems of reduced production efficiency, rising reaction temperature, exceeding the reaction temperature, etc., so as to avoid safety accidents, reduce safety accidents, and increase sustainable sexual effect

Active Publication Date: 2016-10-26
吉林紫瑞新材料有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Usually, the first method of producing 2-EAQ is the direct oxidation method, that is, under the catalyst of hydrochloric acid, 2-ethylanthracene is oxidized into 2-ethylanthraquinone in one step with hydrogen peroxide, but the purity of the product obtained by this method is relatively low. Low; the most used in industry is to condense phthalic anhydride and ethylbenzene into 2-ethylbenzoylbenzoic acid according to the Friedel-Crafts reaction principle, and then use sulfuric acid or P 2 o 5 Ring-closed dehydration produces 2-ethylanthraquinone crude product, then removes impurities by alkali washing or water washing, and synthesizes refined 2-ethylanthraquinone products through sublimation purification, but the products prepared by traditional techniques contain a large amount of sulfuric acid, Affect product purity
[0004] At present, the Chinese patent application publication number CN102050716A discloses a method for separating and purifying 2-ethylanthraquinone from sulfuric acid. Acid analysis is carried out in the water, and then dilute sulfuric acid is separated by extraction to obtain 2-ethylanthraquinone with higher purity. However, although the sulfuric acid content in the product is reduced in this preparation method, the reaction time is longer and the production efficiency is significantly reduced; The Chinese patent with the application publication number CN101633612A discloses a device and process for pipelined continuous production of 2-ethylanthraquinone with high production efficiency. A Y-type jet mixer is used to realize liquid 2-(4-ethylbenz Acyl) benzoic acid and fuming sulfuric acid are quickly mixed, the reaction is rapid, and continuous production can be realized
[0005] However, after being sprayed by the Y-shaped jet, the liquid 2-(4-ethylbenzoyl)benzoic acid and oleum are quickly mixed, and react quickly after mixing, and the reaction temperature rises extremely rapidly, and the maximum temperature can reach 200~220°C. Beyond the reaction temperature of 2-(4-ethylbenzoyl)benzoic acid and oleum, even the carbonization of sulfuric acid will occur

Method used

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  • 2-EAQ (2-ethylanthraquinone) synthesis device and technology

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Effect test

Embodiment 1

[0042] A kind of synthetic device of 2-ethylanthraquinone, refer to figure 1 Shown, comprise the spherical mixer 3 that carries out thorough mixing between materials, the tubular reactor 1 that the material after mixing carries out chemical reaction and the hydrolysis still 2 that separates out 2-ethylanthraquinone through reaction liquid, spherical mixer 3 also A condenser 4 is connected to cool the spherical mixer 3. The mixing process of this kind of synthesis device is peaceful and stable, and the temperature of the reaction process can be controlled at 120-160°C, ensuring that the 2-ethylanthraquinone prepared by the synthesis device The process has good stability and high safety, and the prepared 2-ethylanthraquinone has stable and uniform performance.

[0043] refer to figure 2 As shown, the spherical mixer 3 is in the shape of a sphere, including an inner chamber 31, a middle chamber 32 arranged around the inner chamber 31, and an outer chamber 33 arranged around the...

Embodiment 2

[0047] (1) Add 100 parts by mass of solid raw material 2-(4-ethylbenzoyl)benzoic acid into the spherical mixer, add 100 parts by mass of fuming sulfuric acid into the liquid inlet pipe, heat the spherical mixer, and wait for the solid raw material 2-(4-Ethylbenzoyl)benzoic acid becomes fluid, and the two are fully mixed under stirring;

[0048] (2) Open the condenser, control the water flow into the condenser, and control the temperature of the mixed material flowing out of the spherical mixer to 125°C;

[0049] (3) The materials mixed by the spherical mixer flow into the tubular reactor for reaction;

[0050] (4) The material flowing out of the tubular reactor enters the hydrolysis tank for hydrolysis, and the product 2-ethylanthraquinone is precipitated.

Embodiment 3

[0052] (1) Add 100 parts by mass of solid raw material 2-(4-ethylbenzoyl)benzoic acid into the spherical mixer, add 200 parts by mass of fuming sulfuric acid into the liquid inlet pipe, heat the spherical mixer, and wait for the solid raw material 2-(4-Ethylbenzoyl)benzoic acid becomes fluid, and the two are fully mixed under stirring;

[0053] (2) Open the condenser, control the water flow into the condenser, and control the temperature of the mixed material flowing out of the spherical mixer to 135°C;

[0054] (3) The materials mixed by the spherical mixer flow into the tubular reactor for reaction;

[0055] (4) The material flowing out of the tubular reactor enters the hydrolysis tank for hydrolysis, and the product 2-ethylanthraquinone is precipitated.

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Abstract

The invention discloses a 2-EAQ (2-ethylanthraquinone) synthesis device and technology. The technical scheme is characterized in that the 2-EAQ synthesis device comprises a tubular reactor, a hydrolysis kettle and a sphere mixer, wherein a feed chute allowing a solid material to be fed is formed in the sphere mixer; a sprinkling nozzle for jetting a fluid material is arranged in the sphere mixer; a feed tube communicated with the sprinkling nozzle is further arranged on the sphere mixer; the sphere mixer is communicated with one end of the tubular reactor, and the other end of the tubular reactor is communicated with the hydrolysis kettle; with the adoption of the sprinkling mode of the sprinkling nozzle, fuming sulphuric acid is added more slowly, so that the temperature in the sphere mixer is prevented from being increased to be too high due to too high mixing speed of the materials during mixing of the materials, the temperature in a mixing process is controlled to be in a safe mixing temperature range of the two materials, and the mixing process is safer and more stable.

Description

technical field [0001] The invention relates to a synthesis device and process of anthraquinone derivatives, in particular to a synthesis device and process of 2-ethylanthraquinone. Background technique [0002] 2-Ethylanthraquinone (2-EAQ) is the main raw material and intermediate for the production of hydrogen peroxide, photosensitive compounds, dyes and degradable resins by anthraquinone method. The production of hydrogen peroxide by the anthraquinone method can greatly reduce the production cost of hydrogen peroxide, and the power consumption is only 1 / 10 of that of the electrolysis method. It is currently the main method for producing hydrogen peroxide. Therefore, the development of hydrogen peroxide and related manufacturing industries must first develop 2-EAQ. [0003] Usually, the first method of producing 2-EAQ is the direct oxidation method, that is, under the catalyst of hydrochloric acid, 2-ethylanthracene is oxidized into 2-ethylanthraquinone in one step with h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C50/16C07C46/00
CPCC07C46/00C07C50/16
Inventor 吴洪兴翟金希孙凤祥徐兴度徐勇匡新杰谭政汤晓华
Owner 吉林紫瑞新材料有限公司
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