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Method for preparing benzyl peroxide by adopting methylbenzene liquid-phase air oxidation method

A technology of benzyl peroxide and air oxidation, applied in the field of preparation of organic compounds and preparation of benzyl peroxide, which can solve the problems of chlorine in products

Active Publication Date: 2017-06-13
湖北科林博伦新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the method of producing benzyl alcohol at home and abroad is mainly the benzyl chloride hydrolysis method, which inevitably leads to chlorine in the product, which conflicts with the green chlorine-free requirements of the downstream pharmaceutical, fragrance and cosmetics industries

Method used

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  • Method for preparing benzyl peroxide by adopting methylbenzene liquid-phase air oxidation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1 A method for preparing benzyl peroxide by liquid-phase air oxidation of toluene comprises the following steps:

[0029] (1) Catalyst preparation

[0030] The catalyst cobalt naphthenate, the initiator benzyl peroxide and the auxiliary agent bisphosphonate are dissolved and homogenized in toluene, and then heated to 60°C to obtain a catalyst preparation solution;

[0031] The chemical name of the auxiliary agent bisphosphonate is: 1-hydroxyethylidene-1,1-diphosphonic acid (two) octyl ester;

[0032] (2) Pretreatment of raw materials

[0033] After the air is filtered, it is compressed to a pressure of 1.3MPa (G) and then preheated to a temperature of 160°C to obtain high-temperature compressed air;

[0034] Compress the circulating tail gas to a pressure of 1.3MPa (G) and preheat it to a temperature of 160°C to obtain a high-temperature compressed tail gas;

[0035] Heat and pressurize toluene to 160°C, high-temperature and high-pressure toluene with a pr...

Embodiment 2

[0043] Embodiment 2 A method for preparing benzyl peroxide by liquid-phase air oxidation of toluene comprises the following steps:

[0044] (1) Catalyst preparation

[0045] The catalyst cobalt acetate, the initiator cumene hydroperoxide and the auxiliary agent bisphosphonate are dissolved and homogenized in toluene, and then heated to 70°C to obtain a catalyst preparation solution;

[0046] The chemical name of the auxiliary agent bisphosphonate is: 1-hydroxyethylidene-1,1-diphosphonic acid (two) octyl ester;

[0047] (2) Pretreatment of raw materials

[0048] Compress the air after filtering to a pressure of 1.4MPa(G) and preheat it to a temperature of 170°C to obtain high-temperature compressed air;

[0049] Compress nitrogen to a pressure of 1.4MPa(G) and then preheat to a temperature of 170°C to obtain high-temperature and high-pressure nitrogen;

[0050] Heat and pressurize toluene to 170°C and high temperature and high pressure toluene with a pressure of 1.4MPa(G); ...

Embodiment 3

[0058] Embodiment 3 A method for preparing benzyl peroxide by liquid-phase air oxidation of toluene comprises the following steps:

[0059] (1) Catalyst preparation

[0060] The catalyst cobalt benzoate, the initiator hydrogen peroxide and the auxiliary agent bisphosphonate are dissolved and homogenized in toluene, and then heated to 80° C. to obtain a catalyst preparation solution;

[0061] The chemical name of the auxiliary agent bisphosphonate is: 1-hydroxyethylidene-1,1-diphosphonic acid (two) octyl ester;

[0062] (2) Pretreatment of raw materials

[0063] Compress the air after filtering to a pressure of 1.5MPa(G) and preheat it to a temperature of 180°C to obtain high-temperature compressed air;

[0064] Compress the circulating tail gas to a pressure of 1.5MPa(G) and preheat it to a temperature of 180°C to obtain a high-temperature compressed tail gas;

[0065] Heat and pressurize toluene to 180°C, high-temperature and high-pressure toluene with a pressure of 1.5MPa...

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Abstract

The invention discloses a method for preparing benzyl peroxide by adopting a toluene liquid-phase air oxidation method. Under the synergistic effect of a catalyst, an initiator and an assistant, toluene and oxygen in the air perform oxidizing reaction to generate the benzyl peroxide, the balance of reaction temperature is ensured by adopting an external circulated cooling mode, pressure balance in a toluene oxidation reactor is controlled according to the discharge amount of high-temperature compressed tail gas or nitrogen or reaction tail gas led from the upper portion of the reactor, the reaction process is full-automatically controlled, and safe, stable and continuous reaction is ensured. The oxygen content in the reaction tail gas is ensured by controlling the high-temperature compressed tail gas or nitrogen led from the lower portion of the reactor and reaction conditions, and higher toluene conversion rate is ensured. The product benzyl peroxide can serve as a raw production material of benzene-alcohol, aromatic aldehyde, aromatic acid and benzyl ester, and the method is a green and environment-friendly no-chloride involved process.

Description

technical field [0001] The invention relates to a method for preparing organic compounds, in particular to a method for preparing benzyl peroxide, and belongs to the technical field of organic chemical production. Background technique [0002] Benzyl alcohol is an important chemical organic intermediate, which is widely used in textile auxiliaries, photosensitive materials, medicine, fragrance and dye industries. In 2015, the total global production capacity of benzyl alcohol was about 331,200 tons. China is the world's largest producer of benzyl alcohol, accounting for 39.61% of the world's total production capacity. In recent years, my country's benzyl alcohol production capacity has been increasing, and the output has also increased to a certain extent. At present, benzyl alcohol is mainly produced by hydrolysis of benzyl chloride at home and abroad, which inevitably leads to chlorine-containing products, which conflicts with the downstream green chlorine-free requiremen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C407/00C07C409/08C07C409/16B01J31/04
CPCB01J31/04B01J2231/70C07C407/00C07C409/08C07C409/16
Inventor 宛捍东潘中华
Owner 湖北科林博伦新材料有限公司
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