A kind of production technology that uses anthraquinone method to prepare hydrogen peroxide

A hydrogen peroxide, production process technology, applied in the directions of peroxide/peroxyhydrate/peroxyacid/superoxide/ozonide, inorganic chemistry, chemical instruments and methods, etc. Uneven cooling, incomplete oxidation of hydrogenation liquid, etc., to achieve the effect of strengthening catalytic hydrogenation reaction and oxidation reaction, strengthening gas-liquid/liquid-liquid mass transfer, good stability and selectivity

Active Publication Date: 2019-08-13
BEIJING UNIV OF CHEM TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] At present, the oxidation of hydrogenated liquid is carried out in an oxidation tower with a disperser. The existing oxidation methods and oxidation equipment have the following shortcomings: uneven air distribution, insufficient gas-liquid contact, poor mass transfer effect, and air utilization efficiency. And the oxidation efficiency is low; the oxidation of the hydrogenated liquid is incomplete, which increases the burden of the subsequent process, and the operation is not stable; the cooling is uneven, and the hydrogen peroxide is easy to decompose
[0013] In recent years, the application research of high-gravity technology in the field of chemical engineering has made many important progress. CN103102942A successfully passed the raw oil into the high-gravity reactor equipped with non-precious metal catalyst, and contacted with hydrogen countercurrently to desulfurize, denitrogenate and saturate some aromatics. reaction, but adopt the mode of packing catalyst, the operation process is difficult, the pressure drop in the reaction process is relatively large, and the catalyst is easily deactivated; CN104419454A fixes the metal-polymer catalyst on the rotor of the high-gravity rotary bed reactor, and pyrolysis gasoline and hydrogen pass through The rotating catalyst bed carries out the selective hydrogenation reaction, but the raw material ratio and fixing method of the monolithic catalyst fixing process are not specifically proposed

Method used

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  • A kind of production technology that uses anthraquinone method to prepare hydrogen peroxide
  • A kind of production technology that uses anthraquinone method to prepare hydrogen peroxide
  • A kind of production technology that uses anthraquinone method to prepare hydrogen peroxide

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Embodiment 1

[0087] Such as figure 2 Shown, a kind of production technology that uses anthraquinone method to prepare hydrogen peroxide comprises the steps:

[0088] (1) Pd / Al 2 o 3 The catalyst is loaded in the rotor of the hydrogenation supergravity reactor, the solution containing anthraquinone is poured into the raw material tank, and the feeding pump is turned on to make the liquid circulate and fully wet the catalyst;

[0089] The solution containing anthraquinone is composed of 1,3,5-trimethylbenzene, trioctyl phosphate and 2-ethylanthraquinone; the volume ratio of 1,3,5-trimethylbenzene to trioctyl phosphate is 75:25 The concentration of 1,3,5-trimethylbenzene is 660mL / L; the concentration of trioctyl phosphate is 220mL / L; the concentration of 2-ethylanthraquinone is 120g / L.

[0090] (2) Introduce nitrogen to purge the hydrogenation high-gravity rotating bed reactor; after introducing hydrogen for reduction and activation for 1-24 hours, exhaust it with nitrogen; open the high-...

Embodiment 2

[0100] Such as figure 2 Shown, a kind of production technology that uses anthraquinone method to prepare hydrogen peroxide comprises the steps:

[0101] (1) Pd / Al 2 o 3 The catalyst is loaded in the rotor of the hydrogenation supergravity reactor, the solution containing anthraquinone is poured into the raw material tank, and the feeding pump is turned on to make the liquid circulate and fully wet the catalyst;

[0102] The solution containing anthraquinone is composed of 1,3,5-trimethylbenzene, trioctyl phosphate and 2-ethylanthraquinone; wherein the volume ratio of 1,3,5-trimethylbenzene and trioctyl phosphate is 80: 25; the concentration of 1,3,5-trimethylbenzene is 760mL / L; the concentration of trioctyl phosphate is 240mL / L; the concentration of 2-ethylanthraquinone is 110g / L;

[0103] (2) Introduce nitrogen to purge the hydrogenation high-gravity rotating bed reactor; after introducing hydrogen for reduction and activation for 1-24h, exhaust it with nitrogen; open the...

Embodiment 3

[0113] Such as figure 2 Shown, a kind of production technology that uses anthraquinone method to prepare hydrogen peroxide comprises the steps:

[0114] (1) Pd / Al 2 o 3 The catalyst is loaded in the rotor of the hydrogenation supergravity reactor, the solution containing anthraquinone is poured into the raw material tank, and the feeding pump is turned on to make the liquid circulate and fully wet the catalyst;

[0115] The solution containing anthraquinone is composed of 1,3,5-trimethylbenzene, trioctyl phosphate and 2-ethylanthraquinone; wherein the volume ratio of 1,3,5-trimethylbenzene and trioctyl phosphate is 80: 20; the concentration of 1,3,5-trimethylbenzene is 800mL / L; the concentration of trioctyl phosphate is 200mL / L; the concentration of 2-ethylanthraquinone is 110g / L.

[0116] (2) Introduce nitrogen to purge the hydrogenation supergravity rotary bed reactor; after introducing hydrogen for reduction and activation for 1-24h, exhaust it with nitrogen; open the h...

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Abstract

The invention discloses a production process for preparing hydrogen peroxide by using an anthraquinone process. The production process comprises the following steps: sequentially connecting a hydrogenation hyper-gravity reactor, an oxidation hyper-gravity reactor and an extraction hyper-gravity reactor in series; inputting hydrogen and an anthraquinone-containing solution into a feeding cavity to perform gas-liquid two-phase high-efficiency mixing, and forming a gas-liquid mixture to carry out a hydrogenation reaction so as to obtain a working solution containing oxanthranol; inputting oxygen and the working solution containing oxanthranol into the feeding cavity to perform gas-liquid two-phase high-efficiency mixing, and forming a gas-liquid mixture to carry out an oxidation reaction so as to obtain a working solution containing hydrogen peroxide and anthraquinone; enabling the working solution containing hydrogen peroxide and anthraquinone and deionized water to enter the extraction hyper-gravity reactor to extract; and separating after extraction, thereby obtaining the hydrogen peroxide. According to the production process, gas-liquid solid-phase mass transfer can be intensified by insoluble hydrogen by efficiently utilizing reducing hydrogen when the liquid solubility reaches supersaturation; and moreover, according to the method disclosed by the invention, the hydrogenation efficiency is more than or equal to 13g / L, and the oxidation reaction conversion rate is more than or equal to 95%.

Description

technical field [0001] The invention belongs to the technical field of catalytic hydrogenation reaction, and in particular relates to a production process for preparing hydrogen peroxide by using an anthraquinone method. Background technique [0002] Hydrogen peroxide (also known as hydrogen peroxide) is an important petrochemical raw material and fine chemical product. As a green oxidant, bleaching agent, and disinfectant, it has been widely used in papermaking, medicine, chemical synthesis, electronics, food processing, and textiles. , environmental protection and many other fields. The large-scale production of hydrogen peroxide in my country started late, but the production capacity has grown rapidly, from only 28,000 tons in 1984 to 9 million tons in 2014. [0003] Hydrogen peroxide is widely used and has many unique advantages, so the demand for hydrogen peroxide has always been great. With some new applications of hydrogen peroxide and from the perspective of environ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B15/023
CPCC01B15/023
Inventor 罗勇王帝淞初广文陈建峰邹海魁孙宝昌张亮亮
Owner BEIJING UNIV OF CHEM TECH
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