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Clean production method for preparing liquid antioxidant

A production method and clean production technology, which are applied in the directions of reaction preparation of ester groups and hydroxyl groups, organic chemistry, chemical recycling, etc., can solve problems such as affecting the production capacity of equipment, long post-processing time, unfavorable environmental protection, etc., and achieve the protection of water resources and environment. , good color, the effect of reducing the risk of running material

Active Publication Date: 2011-04-27
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-neck flask equipped with electric stirring, thermometer, vacuum tube, condenser, and cold trap, add 100 grams (0.342 moles) of 3,5-di-tert-butyl-4-hydroxyphenylpropionic acid methyl ester (3, 5-methyl ester), 66.8 grams (0.513 moles) of iso-octanol, 0.1 grams of dibutyltin oxide, vacuumed to below 10mmHg, filled with nitrogen to normal pressure, heated to 140-150°C, and adjusted to -0.07-- 0.08MPa, the methanol generated in the reaction process is continuously drawn out, collected in the cold trap, and the reaction is maintained for 30 minutes under this condition, the temperature is raised to 160-170°C, and the vacuum degree is kept at -0.07--0.08MPa. The methanol is continuously extracted and collected in the cold trap. Under this condition, the reaction is maintained for 30 minutes, the temperature is raised to 180°C, and the vacuum degree is maintained at -0.07--0.08MPa. The methanol generated during the reaction process is continuously extracted and ...

Embodiment 2

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

Embodiment 3

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

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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 through transesterification of 3,5-di-tert-butyl-4-hydroxyphenylpropionate methyl ester and 2-ethylhexanol under the action of a catalyst Cleaner production methods without waste water discharge. Background technique [0003] Antioxidants are indispensable additives in the production and processing of polymers. Without antioxidants, polymers will be oxidatively degraded during processing and 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 powder antioxidants. The shortcomings of powder antioxid...

Claims

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Application Information

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IPC IPC(8): C07C69/732C07C67/03
CPCY02P20/584
Inventor 付建英
Owner SHANDONG LINYI SUNNY WEALTH CHEM CO LTD
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