Method for preparing environment-friendly plasticizer by high concentration hydrogen peroxide epoxidized oil
An environmentally friendly plasticizer and hydrogen peroxide technology, applied in the production of fatty acids, chemical modification of fatty acids, etc., can solve the problems of long reaction time, poor selectivity, and low epoxy value, and achieve shortened reaction time, low cost, and high epoxy value Effect
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Embodiment 1
[0015] Add 30 g of fatty acid methyl esters with an iodine value of 102 g / 100 g and 1.8 g of formic acid with a mass fraction of 88% into a three-necked flask equipped with a thermometer, a stirrer and a dropping funnel, and heat it in a water bath to 40°C. Slowly add 7 g of 70% H 2 o 2 , maintain the reaction temperature at 60°C, and after 4 hours of complete reaction, transfer the reaction mixture to a separatory funnel, keep it warm and let it stand for 40 minutes to separate layers; the upper layer is the oil phase, and the lower layer is the water phase. The pH is near neutral. The oil phase was distilled under reduced pressure at 85°C to obtain the product epoxy fatty acid methyl ester.
[0016] The epoxy value of the product obtained is 4.64%, and the iodine value is 1.4 g / 100g. The conversion rate reached 98.6%, and the selectivity reached 73.2%.
Embodiment 2
[0018] Add 30 g of cottonseed oil with an iodine value of 113 g / 100 g and 2 g of formic acid with a mass fraction of 88% into a three-necked flask equipped with a thermometer, a stirrer and a dropping funnel, heat it in a water bath to 40 ° C, and continue to vigorously Add dropwise 7.9g of 70% H with stirring 2 o 2 , maintain the reaction temperature at 60°C, after 4 hours of complete reaction, transfer the reaction mixture to a separatory funnel, keep it warm and let it stand for stratification; the upper layer is the oil phase, and the lower layer is the water phase. After the oil phase is separated, the oil phase is washed with water until the pH The value is near neutral. The oil phase was distilled under reduced pressure at 85° C. to obtain the product epoxy cottonseed oil.
[0019] The epoxy value of the product obtained is 5.84%, and the iodine value is 2.8 g / 100g. The conversion rate reaches 97.5%, and the selectivity reaches 84.1%
Embodiment 3
[0021] Add 30 g of fatty acid methyl esters with an iodine value of 102 g / 100 g and 2 g of formic acid with a mass fraction of 88% into a three-necked flask equipped with a thermometer, a stirrer and a dropping funnel, and heat it in a water bath to 40°C. Under vigorous stirring, 8 g of 60% H 2 o 2 , maintain the reaction temperature at 60°C, and after 4 hours of complete reaction, transfer the reaction mixture to a separatory funnel, keep it warm and let it stand for stratification; the upper layer is the oil phase, and the lower layer is the water phase. After the oil phase is separated, wash the oil phase with water until The pH is near neutral. The oil phase was distilled under reduced pressure at 85°C to obtain the product epoxy fatty acid methyl ester.
[0022] The epoxy value of the product obtained is 4.75%, and the iodine value is 2.2 g / 100g. The conversion rate reached 97.8%, and the selectivity reached 75.6%.
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Abstract
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