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Method for synthesizing thiodiglycol dimyristate

A technology of thiodiethylene glycol and myristate, applied in the preparation of thioether, organic chemistry, etc., can solve the problems such as no synthetic method of thiodiethylene glycol digyristate, and achieve good antioxidant properties , easy source, simple and feasible process

Inactive Publication Date: 2010-09-08
MAOMING COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] And thiodiethylene glycol dimyristate has no report about its synthetic method in China

Method used

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  • Method for synthesizing thiodiglycol dimyristate
  • Method for synthesizing thiodiglycol dimyristate
  • Method for synthesizing thiodiglycol dimyristate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Thiodiethylene glycol is produced by Fengyuan Fine Chemical Company of Guangdong Zhonghe Chemical Plastic Co., Ltd., with a purity of 74.0%; analytically pure myristic acid is produced by Guangzhou Chemical Reagent Factory; the water-carrying agent is xylene; the catalyst is prepared by the following method Activated carbon loaded p-toluenesulfonic acid:

[0018] Soak the granular activated carbon washed with water and dried at 115°C in 100mL p-toluenesulfonic acid solution with a mass fraction of 25%, so that the load mass fraction of p-toluenesulfonic acid is 20%, filter, and filter the residue at 110°C Dry for 5h and set aside.

[0019] In reactor, add successively 15 moles of myristic acid, 10 moles of thiodiethylene glycol, and 1% catalyst of thiodiglycol and myristic acid gross mass and water-carrying agent by the thiodiglycol of 100 grams gross mass and myristic acid The metered amount is 30mL, stirred at a temperature of 170°C to 180°C until almost no water eva...

Embodiment 2

[0021] The difference from Example 1 is that the catalyst is concentrated sulfuric acid with a mass concentration of 75%.

Embodiment 3

[0023] The difference from Example 1 is that the catalyst is p-toluenesulfonic acid.

[0024] Table 1: Embodiment one, two and three adopt the influence of different catalysts on yield

[0025]

[0026] Table 2: the influence of catalyst consumption on productive rate (with embodiment one, just change catalyst consumption)

[0027]

[0028] Table 3: the influence of thiodiethylene glycol and myristic acid mol ratio on yield (with embodiment one, just change thiodiglycol and myristic acid mol ratio)

[0029]

[0030] Table 4: the influence of reaction time on productive rate (with embodiment one, just change changes reaction time)

[0031]

[0032] Product Structure Characterization:

[0033] Adopt Nicolet.760 infrared spectrometer, potassium bromide tablet method to measure the infrared spectrum of the product. The mass spectrum of the product was determined by Trace DSQGC / MS, and its melting point was determined on an XT-4 binocular melting point analyzer.

[...

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Abstract

The invention discloses a method for synthesizing thiodiglycol dimyristate, which comprises the following steps: in the presence of catalyst and water entrainer, thiodiglycol is reacted with myristic acid at the temperature of 170-180DEG C, wherein the water entrainer is dimethylbenzene, and the catalyst is concentrated sulfuric acid and, p-toluenesulfonic acid or activated carbon-loaded p-toluenesulfonic acid prepared by the following method: soaking the rinsed and dried granular activate carbon in a p-toluenesulfonic acid solution to enable the loaded mass fraction of the p-toluenesulfonic acid to be 15-25%, filtering and drying the filter residue to obtain the thiodiglycol dimyristate. The invention has simple and feasible process, easily-obtained raw materials and high yield; and when the product of the invention is applied in polypropylene, the tests of melt flow rate, tensile strength, elongation at break and impulse strengthen show that the product has excellent oxidation resistance.

Description

technical field [0001] The invention relates to a production method of an antioxidant, in particular to a synthesis method of thiodiethylene glycol dimyristate. Background technique [0002] Antioxidants are chemical additives that can effectively reduce the speed of the autoxidation reaction of polymer materials, delay the aging and degradation process of polymer materials, and improve the service life of polymer materials. With the extensive and extensive use of rubber and plastic products, the demand and consumption of antioxidants are increasing, and new and special types of antioxidants are constantly emerging. [0003] Thiodiethylene glycol difatty acid ester is a new class of sulfur-containing antioxidants, which can be used as antioxidants for polymers, vegetable oils, synthetic lubricating oils, etc., to prevent oxygen, heat, light or high-energy radiation from destruction of organic matter. Antioxidants similar to this antioxidant such as fatty alcohol thiodiprop...

Claims

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Application Information

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IPC IPC(8): C07C323/12C07C319/20
Inventor 黄敏周统武蒋达洪余梅杜辉
Owner MAOMING COLLEGE
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