Hydrogen peroxide producing efficient oxidation method

A hydrogen peroxide, high-efficiency technology, applied in chemical instruments and methods, peroxide/peroxy hydrate/peroxyacid/superoxide/ozonide, inorganic chemistry, etc., can solve the long time of complete oxidation reaction and the safety of existence Hidden dangers, high tail oxygen content, etc., to reduce hydrogen peroxide decomposition and oxidation side reactions, increase gas-liquid reaction rate, and reduce oxidation time

Active Publication Date: 2016-05-11
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There are several problems in the current oxidation process: (1) The oxidation reaction is an automatic oxidation reaction, and the complete oxidation reaction takes a long time, resulting in the decomposition of hydrogen peroxide and many side reactions; (2) During the oxidation reaction, the air The air bubbles will gradually grow and the gravity of the material will cause the back-mixing of the air and the hydrogenated liquid to cause insufficient contact, and the oxidation yield will

Method used

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  • Hydrogen peroxide producing efficient oxidation method

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Embodiment 1

[0027] One section of oxidation tower, tower diameter 1200mm, height 2500mm, total volume of oxidation tower is 3.37m 3 . Hydrogenated liquid 60m 3 / h, the amount of air added is 2000Nm 3 / h. First mix the air and hydrogenated liquid with the pipeline, then introduce the high-pressure dissolved air pump under the conditions of 50-55 °C and 15-16 MPa, dissolve 40% of the air in the hydrogenated liquid, and then introduce the hydrogenated liquid into the atomizer, which is equipped with Atomizing nozzles can instantly atomize the gas-liquid mixture in the oxidation tower, and the atomized material undergoes oxidation reaction and then undergoes gas-liquid separation at the top of the tower. The results show that when the residence time of the reaction materials in the tower is 2.5-2.8 minutes, the oxidation yield after oxidation reaction is 95%-97%, and the tail oxygen content is 3%-5%.

Embodiment 2

[0029] Three identical oxidation towers are connected in parallel, the diameter of the tower is 600mm, the height is 3400mm, and the volume of a single oxidation tower is 1.01m 3 . Hydrogenation solution 3.1m 3 / h, the amount of air added 100Nm 3 / h. First, the air and the hydrogenation liquid are divided into three materials respectively, and after the gas-liquid mixing, three high-pressure dissolved air pumps are introduced under the conditions of 50-55°C and 8-10MPa to dissolve 32% of the air in the hydrogenation liquid, and then the gas-liquid The mixture is introduced into the atomizer, which is equipped with an atomizing nozzle, so that the gas-liquid mixture is atomized instantly in the oxidation tower, and the atomized material undergoes oxidation reaction and then undergoes gas-liquid separation at the top of the tower. The results show that when the residence time of the reaction materials in the tower is 2.2 to 2.4 minutes, the oxidation yield after oxidation rea...

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Abstract

The invention discloses a hydrogen peroxide producing efficient oxidation method. The hydrogen peroxide producing efficient oxidation method comprises the following steps: firstly, introducing hydrogenating liquid and oxygen-containing gas together into a high-pressure gas dissolving system, and dissolving most of the oxygen-containing gas into the hydrogenating liquid; secondly, introducing a material into an atomizer, and fully atomizing working liquid/hydrogen into micron-sized droplets; performing efficient oxidation on the atomized droplets in an oxidation reactor; and performing gas-liquid separation on the completely oxidized material, wherein oxidized liquid enters the next process. In the hydrogen peroxide oxidation process, the high-pressure gas dissolving system, a micron-grade atomizing system and a quick reaction system are used; the process technology is advanced; the stay time for achieving complete oxidation of the material in the reactor is short, only 1/5 of the stay time in the prior art, so that oxidation side reactions are few, decomposition of hydrogen peroxide is less, the oxidation efficiency is higher than or equal to 98%, and the oxidation yield is higher than or equal to 98%.

Description

technical field [0001] The invention relates to an oxidation method for producing hydrogen peroxide, in particular to an efficient oxidation method for producing hydrogen peroxide by anthraquinone method. Background technique [0002] The anthraquinone method is currently the main method for producing hydrogen peroxide. It uses 2-ethylanthraquinone (EAQ) as the working carrier, and heavy aromatics (Ar), trioctyl phosphate (TOP) or other components as the working solvent to prepare the working solvent. The hydrogen peroxide product is obtained through anthraquinone hydrogenation, hydrogen anthraquinone oxidation, pure water extraction and working fluid post-treatment. The hydrogen anthraquinone oxidation process is an automatic oxidation reaction between the working liquid containing hydrogen anthraquinone and the oxygen-containing gas in the oxidation tower. The reaction process is carried out between a large amount of air and the hydrogenation liquid, and the gas-liquid two...

Claims

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Application Information

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IPC IPC(8): C01B15/023
Inventor 杨秀娜齐慧敏王海波金平阮宗琳
Owner CHINA PETROLEUM & CHEM CORP
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