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Formula of working liquid for hydrogen peroxide production based on anthraquinone process

A hydrogen peroxide, working fluid technology, applied in peroxide/peroxyhydrate/peroxyacid/superoxide/ozonide, inorganic chemistry, chemical instruments and methods, etc., can solve the problem of high density and achieve The effect of reducing the degradation rate of anthraquinone

Inactive Publication Date: 2010-08-11
江山市双氧水有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The purpose of the present invention is to solve the shortcoming of the high density of the BEA / heavy aromatics system under the premise of maintaining the advantages of BEA to the greatest extent, thereby providing a working fluid for hydrogen peroxide production with excellent performance

Method used

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  • Formula of working liquid for hydrogen peroxide production based on anthraquinone process

Examples

Experimental program
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Effect test

Embodiment 1

[0017] This example describes the synthesis of N-phenyl N-ethylbenzamide (BEA).

[0018] The synthesis of BEA is carried out by N-ethylaniline and benzoyl chloride in the presence of excess NaOH according to the following reaction formula:

[0019]

[0020] Inject 69.3 grams of colorless N-ethylaniline (0.57 moles, molecular weight 121.6) and 176 grams (0.9 moles, about excess 50%) of 20% NaOH solution in a 500 mL three-necked flask with a thermometer and a dropping funnel. Bottle is immersed in the water bath that is placed on the electrothermal electromagnetic stirrer, benzoyl chloride 69.6mL (84.3 grams, 0.6 mole, specific gravity 1.23, about excess 5%, molecular weight 140.5) inject in the dropping funnel, stirring, and control reaction temperature At about 60°C, slowly add benzoyl chloride dropwise (reaction exothermic), and the drop is completed in about 40 minutes. Continue to stir at this reaction temperature for 30 minutes to complete the reaction and hydrolyze the...

Embodiment 2

[0023] The hydrogenation experiments were carried out in a magnetically stirred fixed-bed glass reactor. Charge 40ml Pd-Al in the reactor 2 o 3 Catalyst, use H at normal pressure, 65-80°C 2 :N 2 = After 24 hours of activation of the catalyst with a 3:1 hydrogen-nitrogen mixture, inject 240ml of working fluid into the reactor, keep the constant temperature at 50°C and continuously feed the above-mentioned atmospheric pressure hydrogen-nitrogen mixture with a gas volume of 1L / min for hydrogenation, and the magnetic stirring speed It is sufficient to ensure that the flow rate of the working fluid through the catalyst layer is about 200ml / min. Take out a small amount of liquid from the reaction system regularly to oxidize with oxygen, extract the oxidized liquid with pure water, and use potassium permanganate titration to measure H 2 o 2 content. H when precipitation occurs in the working solution 2 o 2 The content is used as the limit hydrogen effect of the working fluid....

Embodiment 3

[0026] Same as Example 2, just change the composition of the working solution into: solvent: heavy aromatics 75% (v / v), trioctyl phosphate 17% (v / v), BEA8% (v / v); working carrier: working solution Total quinones 182g / L, of which BAQ154g / L, H 4 BAQ 28g / L. Hydrogenation result (precipitation) is hydrogen effect: 12.13gH 2 o 2 / L, the density of the working fluid is 0.9320g / L measured at 30°C by the density bottle method.

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Abstract

The invention provides the formula of a working liquid for hydrogen peroxide production based on the anthraquinone process. The working liquid comprises solvent and a working carrier, wherein the solvent comprises the following components by volume percentage: 65% to 80% of alkyl benzene, 5% to 25% of trioctylphosphate (TOP) and 4.5% to 17.8% of N-phenyl-N-ethyl-benzamide; the working carrier is particularly a mixture of alkyl anthraquinone and alkyl tetrahydroanthraquinone with the total content thereof being 130g / L to 200g / L in the working liquid. The working liquid of the invention has the advantages of high working carrier solubility, moderate density and high working load, and reduces the degradation rate of anthraquinone. Therefore, the produced hydrogen peroxide has high yield and low material consumption, and the production process is simple and easy-to-operate.

Description

technical field [0001] The invention relates to the preparation technology of working liquid in the production of hydrogen peroxide by anthraquinone method, in particular, it is a component formula for the working liquid in the production of hydrogen peroxide by anthraquinone method. Background technique [0002] The anthraquinone process is currently a widely used hydrogen peroxide production process. In this process, alkylanthraquinones dissolved in a solvent or solvent mixture (working solution) are first hydrogenated to alkylanthraquinones in the presence of a hydrogenation catalyst (hydrogenation step). The alkylhydroanthraquinones are then oxidized to regenerate the original alkylanthraquinones with concomitant formation of hydrogen peroxide (oxidation step). The hydrogen peroxide is usually isolated extractively with water (extraction step), while the alkylanthraquinones are recycled to the hydrogenation step. [0003] In the anthraquinone process, two different typ...

Claims

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Application Information

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IPC IPC(8): C01B15/023
Inventor 王晓韡夏小明徐振祥陈晓雍
Owner 江山市双氧水有限公司
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