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Clean production method for preparing liquid antioxidant

A production method and antioxidant technology, applied in the field of preparation of liquid antioxidants, can solve problems affecting equipment production capacity, long post-processing time, unfavorable environmental protection, etc., to achieve protection of water resources and environment, good color, and reduced running material risk effect

Active Publication Date: 2013-06-19
SHANDONG LINYI SUNNY WEALTH CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, there are many production methods of the liquid antioxidant involved in the present invention, such as US Patent No. 5,481,023 discloses a preparation method, which is washed three times with 6% formic acid solution and water in the post-treatment process of the method, so The treatment process produces a large amount of wastewater containing organic impurities, which is not conducive to environmental protection, and the post-treatment time is long and the process is complicated, which affects the production capacity of the equipment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] In a 500ml four-necked flask equipped with electric stirring, thermometer, vacuum tube, condenser and cold trap, add 100g (0.342mol) of 3,5-di-tert-butyl-4-hydroxyphenylpropionic acid methyl ester (3, 5-methyl ester), 66.8 grams (0.513 moles) of isooctyl alcohol, 0.1 grams of dibutyl tin oxide, evacuated to below 10mmHg, filled with nitrogen to normal pressure, heated to 140-150℃, adjusted the vacuum to -0.07-- 0.08MPa, the methanol generated during the reaction is continuously extracted and collected in a cold trap. The reaction is maintained under this condition for 30 minutes, and the temperature is increased to 160-170°C, and the vacuum degree is maintained at -0.07-0.08MPa. The methanol is continuously drawn out and collected in a cold trap. The reaction is kept under these conditions for 30 minutes, the temperature is raised to 180°C, and the vacuum is maintained at -0.07--0.08MPa. The methanol generated during the reaction is continuously drawn out and collected in...

Embodiment 2

[0022] In a 500ml four-necked flask equipped with electric stirring, thermometer, vacuum tube, condenser and cold trap, add 100g (0.342mol) of 3,5-di-tert-butyl-4-hydroxyphenylpropionic acid methyl ester (3, 5-methyl ester), 53.4 g (0.410 mol) of isooctyl alcohol, 0.2 g of aluminum triisopropoxide, evacuated to below 10mmHg, filled with nitrogen to normal pressure, heated to 140-150°C, adjusted the vacuum to -0.07-- 0.08MPa, the methanol generated during the reaction is continuously extracted and collected in a cold trap. The reaction is maintained under this condition for 30 minutes, and the temperature is increased to 160-170°C, and the vacuum degree is maintained at -0.07-0.08MPa. The methanol is continuously drawn out and collected in a cold trap. The reaction is kept under these conditions for 30 minutes, the temperature is raised to 180°C, and the vacuum is maintained at -0.07--0.08MPa. The methanol generated during the reaction is continuously drawn out and collected in t...

Embodiment 3

[0024] In a 500ml four-necked flask equipped with electric stirring, thermometer, vacuum tube, condenser and cold trap, add 100g (0.342mol) of 3,5-di-tert-butyl-4-hydroxyphenylpropionic acid methyl ester (3, 5-methyl ester), 55.7 g (0.427 mol) of isooctyl alcohol, 0.5 g of dibutyl tin oxide, evacuated to below 10mmHg, filled with nitrogen to normal pressure, heated to 140-150℃, adjusted the vacuum to -0.07-- 0.08MPa, the methanol generated during the reaction is continuously extracted and collected in a cold trap. The reaction is maintained under this condition for 30 minutes, and the temperature is increased to 160-170°C, and the vacuum degree is maintained at -0.07-0.08MPa. The methanol is continuously drawn out and collected in a cold trap. The reaction is kept under these conditions for 30 minutes, the temperature is raised to 180°C, and the vacuum is maintained at -0.07--0.08MPa. The methanol generated during the reaction is continuously drawn out and collected in the cold ...

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PUM

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Abstract

The invention provides a clean production method for a liquid hindered phenol antioxidant. The method comprises the following steps of: performing an ester exchange reaction on 3,5-ditertiary butyl-4-hydroxyphenylmethyl propionate and 2-ethylhexanol under the action of a small amount of catalyst; and adsorbing to remove the residual catalyst by using an adsorbent after the reaction, and filteringto prepare the liquid hindered phenol antioxidant. The method is a clean production method which does not require water washing, has no solvent in the reaction process and has no discharge of three wastes.

Description

Technical field [0001] The invention relates to a preparation method of a liquid antioxidant, in particular to a clean production method of a hindered phenolic liquid antioxidant. [0002] More specifically, the present invention relates to a method for preparing a liquid antioxidant by transesterifying methyl 3,5-di-tert-butyl-4-hydroxyphenylpropionate and 2-ethylhexanol under the action of a catalyst. Clean production method without waste water discharge. Background technique [0003] Antioxidant is an indispensable additive in polymer production and processing. If there is no antioxidant, the polymer will be oxidatively degraded during processing and will age quickly during use. Antioxidants can not only help polymers overcome the above problems, but also enable polymer products to obtain excellent physical and mechanical properties. At present, the types of antioxidants on the market are mainly solid powdered antioxidants. The main deficiencies of powdered antioxidants are as...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C69/732C07C67/03
CPCY02P20/584
Inventor 付建英
Owner SHANDONG LINYI SUNNY WEALTH CHEM CO LTD