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Method for preparing epoxy fatty acid methyl ester

A technology of epoxy fatty acid methyl ester and fatty acid methyl ester, which is applied in the field of preparation of epoxy fatty acid methyl ester, can solve the problems of large amount of hydrogen peroxide, difficult treatment of wastewater, and potential safety hazards, so as to improve production safety and reduce sewage Effects of handling costs, improving production efficiency and product quality

Inactive Publication Date: 2012-03-28
CHONGQING HAOTAI ENERGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this process is that the amount of hydrogen peroxide used at one time is large, the reaction time is long, it is not easy to control, and it is prone to explosion. After the reaction, 3% to 5% of hydrogen peroxide remains in the formic acid wastewater, which not only has potential safety hazards, but also Wastewater is not easy to treat, which is not conducive to environmental protection

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Example 1: Take 500g of C18-based mixed fatty acid methyl ester and put it into a container, start stirring, add 25g of formic acid with a mass concentration of 85% and 0.25g of phosphoric acid with a mass concentration of 85%, and heat up to 55°C-70°C , slowly add 70g of hydrogen peroxide with a mass concentration of 50%, the hydrogen peroxide is added at a rate of 300 liters / hour to 700 liters / hour, react at a temperature of 70°C to 90°C and normal pressure for 1 hour, and then slowly pump the reaction system Vacuum, the vacuuming time is about 1 hour, and the final vacuum degree is -400mmHg~-500mmHg. After reaching the specified vacuum degree and time, slowly break the vacuum to normal pressure; slowly add 70g of hydrogen peroxide with a mass concentration of 50% , add hydrogen peroxide at a rate of 300 liters / hour to 700 liters / hour, react at a temperature of 70°C to 90°C and normal pressure for 1 hour, then slowly vacuumize the reaction system for about 1 hour, and ...

Embodiment 2

[0023] Example 2: Take 500 g of mixed fatty acid methyl esters mainly composed of C18 and put them into a container, start stirring, add 20 g of formic acid with a mass concentration of 85% and 0.25 g of phosphoric acid with a mass concentration of 85%, and heat up to 55 ° C ~ 70 ° C , slowly add 50g of hydrogen peroxide with a mass concentration of 50%, the hydrogen peroxide is added at a rate of 300 liters / hour to 700 liters / hour, react at a temperature of 70°C to 90°C and normal pressure for 1 hour, and then slowly pump the reaction system Vacuum, the vacuuming time is about 1 hour, and the final vacuum degree is -400~-500mmHg. When the specified vacuum degree and time are reached, slowly break the vacuum to normal pressure; slowly add 50g of hydrogen peroxide with a mass concentration of 50% , add hydrogen peroxide at a rate of 300 liters / hour to 700 liters / hour, react at a temperature of 70°C to 90°C and normal pressure for 1 hour, then slowly vacuumize the reaction system...

Embodiment 3

[0030] Example 3: Take 500 g of mixed fatty acid methyl esters mainly composed of C18 and put them into a container, start stirring, add 20 g of formic acid with a mass concentration of 85% and 0.25 g of phosphoric acid with a mass concentration of 85%, and heat up to 55 ° C ~ 70 ° C , slowly add 55g of hydrogen peroxide with a mass concentration of 50%, the hydrogen peroxide is added at a rate of 300 liters / hour to 700 liters / hour, react at a temperature of 70°C to 90°C and normal pressure for 1 hour, and then slowly pump the reaction system Vacuum, the vacuuming time is about 1 hour, and the final vacuum degree is -400~-500mmHg. After reaching the specified vacuum degree and time, slowly break the vacuum to normal pressure; slowly add 55g of hydrogen peroxide with a mass concentration of 50% , add hydrogen peroxide at a rate of 300 liters / hour to 700 liters / hour, react at a temperature of 70°C to 90°C and normal pressure for 1 hour, then slowly vacuumize the reaction system f...

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Abstract

The invention discloses a method for preparing epoxy fatty acid methyl ester. The method comprises the following steps of: mixing fatty acid methyl ester with formic acid and phosphoric acid, heating, then, adding oxydol; carrying out reaction under normal pressure, then, carrying out reaction under vacuum, further, breaking vacuum to the normal pressure; and then, adding the oxydol again, and successively carrying out reaction under the normal pressure / the vacuum. The method for preparing the epoxy fatty acid methyl ester has the advantages that: in the reaction system, the oxydol is added in twice and the reaction is carried out under vacuum, thus, the reaction rate is obviously increased, further, the epoxy value of the epoxy fatty acid methyl ester is increased to 3.5wt / % to 5wt / %, so that the production efficiency and the product quality are improved; through adding the oxydol twice in the reaction, the total amount of added oxydol is obviously reduced, thus, the use amount of the oxydol can be saved about 15%-20%; due to the decrease of the use amount of the oxydol, the safety in production is enhanced, over 98% of the oxydol is completely decomposed after finishing the reaction, the following waste water treatment is simpler, the environmental protection pressure is lightened, and the environmental pollution and the cost for sewage treatment are reduced; and in addition, an industrial chain is formed through sufficiently utilizing the upstream and downstream products in chemical industry.

Description

technical field [0001] The invention relates to a preparation method of epoxy fatty acid methyl ester. Background technique [0002] Epoxy fatty acid methyl ester is produced by epoxidation after fatty acid and alcohol are esterified. With the development of plastic industry, epoxy fatty acid methyl ester with multiple functions is being used more and more. For example, epoxy fatty acid methyl ester is a non-toxic plasticizer widely used in polyvinyl chloride. It has low volatility and can be used to completely replace epoxy soybean oil and partially replace DOP in the processing of polyvinyl chloride products. It has excellent compatibility. Compared with DOP, the heat resistance and volatility during processing are better than DOP, which can significantly improve the physical properties of the product and prolong the service life of the product during the processing of the product. When it is used together with metal stabilizers, it has a good synergistic stabilizing effe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D301/12
Inventor 陈恒顺严小建金健
Owner CHONGQING HAOTAI ENERGY CO LTD