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A kind of method that waste material recovery prepares 2,6-di-tert-butylphenol

A technology for recycling di-tert-butylphenol and waste, which is applied in chemical instruments and methods, preparation of organic compounds, organic chemistry, etc., can solve the problems of polluting the environment, wasting raw materials, affecting product yields, etc. cost saving effect

Active Publication Date: 2017-01-11
营口风光新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the disadvantages are: in the process of the alkylation reaction, a higher pressure is required to obtain a crude product with a higher conversion rate, and the system is in a strictly sealed state. Once the pressure is insufficient or the entry of oxygen will seriously affect the quality of the product. yield and cause serious safety incidents
And in its downstream products such as the synthesis of β-(3,5-di-tert-butyl-4-hydroxyphenyl) methyl propionate, 2,6-di-tert-butylphenol and methyl acrylate are used as raw materials, The crude product of methyl β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate is obtained under the action of the catalyst. After the reaction, the crude product needs to be refined by rectification. During the rectification process, by-products will be produced and other waste materials, which contain components such as 2-(3.5-di-tert-butyl-4-hydroxyphenyl) dimethyl glutarate etc. in this part of waste materials, all discard this part of waste materials in the prior art, pollute on the one hand environment, waste of raw materials on the other hand

Method used

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  • A kind of method that waste material recovery prepares 2,6-di-tert-butylphenol
  • A kind of method that waste material recovery prepares 2,6-di-tert-butylphenol
  • A kind of method that waste material recovery prepares 2,6-di-tert-butylphenol

Examples

Experimental program
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Effect test

Embodiment 1

[0018] Example 1 The method for preparing 2,6-di-tert-butylphenol from waste recycling

[0019] Add 600g of β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate methyl ester rectification waste, 4.8g of sodium montmorillonite into the tank with mechanical stirring, thermometer socket, distillation device, and feeding port In a 1000ml four-neck flask, vacuumize and maintain the pressure at -0.08~-0.09Mpa. Use a heating mantle to raise the temperature of the chemical material, and start stirring. When the temperature reaches 100~110℃, distillate begins to evaporate. After 1h, the temperature in the bottle continues. Rise up, and when it reaches 130-140°C, collect the distillate, which is the target product 2,6-di-tert-butylphenol. After 7h, the temperature continued to rise and no distillate flowed out, and the reaction was terminated.

[0020] After infrared chromatography inspection, the results are as follows: figure 1 As shown, the wavenumber is 3567.79cm -1 The absorption pe...

Embodiment 2

[0021] Example 2 The method for preparing 2,6-di-tert-butylphenol from waste recycling

[0022] Add 600g of β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate methyl ester rectification waste, 4.8g of calcium-based montmorillonite into the tank with mechanical stirring, thermometer socket, distillation device, and feeding port. In a 1000ml four-necked flask, vacuumize and maintain the pressure at -0.08~-0.09Mpa. Use a heating mantle to raise the temperature of the chemical material, and start stirring. When the temperature reaches 100~110℃, distillate begins to evaporate. After 1h, the temperature in the bottle continues to Rise up, and when it reaches 130-140°C, the fraction collected is the desired product 2,6-di-tert-butylphenol. After 7h, the temperature continued to rise and no distillate flowed out, and the reaction was terminated.

[0023] After infrared spectroscopy, the results are as follows: figure 2 As shown, the wavenumber is 3567.79cm -1 The absorption peak at ...

Embodiment 3

[0024] Example 3 Method for preparing 2,6-di-tert-butylphenol from waste recycling

[0025] Add 600g of β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate methyl ester rectification waste, 4.8g of activated clay to 1000ml four-port with mechanical stirring, thermometer socket, distillation device, and feeding port In the flask, vacuumize and keep the pressure at -0.08~-0.09Mpa. Use a heating mantle to raise the temperature of the chemical material, and start stirring. When the temperature reaches 100~110°C, distillate begins to evaporate. After 1 hour, the temperature in the bottle continues to rise. After reaching 130-140°C, the fraction collected is the desired product 2,6-di-tert-butylphenol. After 7h, the temperature continued to rise and no distillate flowed out, and the reaction was terminated.

[0026] After infrared spectroscopy, the results are as follows: image 3 As shown, the wavenumber is 3567.79cm -1 The absorption peak at is attributed to HO-AR; the wavenumber ...

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Abstract

The invention relates to a method for preparing 2, 6-di-tert-butylphenol from recovered waste. The method is characterized in that residual waste obtained by methyl beta-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate rectification undergoes a reaction in the presence of a catalyst at a temperature of 130-140 DEG C under pressure of -0.08 to -0.09 Mpa to produce 2, 6-di-tert-butylphenol. The method has the advantages of simple processes, waste recycle, less energy consumption and high 2, 6-di-tert-butylphenol purity.

Description

technical field [0001] The invention belongs to the field of chemical synthesis, and in particular relates to a method for preparing 2,6-di-tert-butylphenol by utilizing recycled waste materials. Background technique [0002] Most industrial organic materials such as plastics, rubber, fibers, adhesives, food and feed have the property of reacting with oxygen. There are many methods to prevent the oxidation of organic matter in industry, including polymer structure modification, obtaining physical stability through polymer orientation, and adding antioxidants. Among them, adding antioxidants is the easiest and most effective method. At present, the main varieties of antioxidants are hindered phenols, phosphites, thioethers and a small amount of metal ion deactivators, some amines and dithiocarbamates. Hindered phenolic antioxidants are the main body of plastic antioxidants. [0003] 2,6-Di-tert-butylphenol is mainly used in the manufacture of natural rubber and synthetic r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C37/50C07C39/06
CPCC07C37/50C07C39/06
Inventor 王磊齐涛
Owner 营口风光新材料股份有限公司