Preparation method of tripalmitin citrate
A technology of tris and palmitate citrate, applied in the preparation of carboxylic acid esters, the preparation of organic compounds, chemical instruments and methods, etc., can solve the problems of plasticizers not resistant to migration, unsuitable catalysts, and high economic costs, and achieve finished products. The effect of light color, good catalytic effect and low economic cost
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Embodiment 1
[0023] (1) The preparation method of the composite catalyst: Weigh 10 g of zinc acetate and 2 g of antimony trioxide in a 50 ml beaker, perform electromagnetic stirring at room temperature, mix evenly, and set aside.
[0024] (2) Esterification reaction: add 0.2mol citric acid, 0.6mol palmityl alcohol, 0.052mol hexanaphthene in the 500ml four-necked bottle that is equipped with temperature control oil bath, agitator, water separator, reflux condenser and heat to Stir at 30°C. After the citric acid is completely dissolved and mixed evenly with palmityl alcohol, take a sample to measure the initial acid value A of the reaction solution. 0 , and then add 0.19 g of the composite catalyst prepared in step (1), heat to 100° C., and stir to generate reflux. When the water produced by the reaction begins to separate from the water separator, it is counted as the start time of the esterification reaction. When completely anhydrous is separated from the water separator, the reaction is...
Embodiment 2
[0028] (1) The preparation method of the composite catalyst: Weigh 10 g of zinc acetate and 10 g of antimony trioxide in a 50 ml beaker, perform electromagnetic stirring at room temperature, mix well, and set aside.
[0029] (2) Esterification reaction: add 0.2mol citric acid, 1mol palmityl alcohol, 0.06mol cyclohexane to 90 ℃, stirring, after the citric acid is completely dissolved and mixed evenly with palmitic alcohol, take a sample to measure the initial acid value of the reaction solution A 0 , and then add 0.28 g of the composite catalyst prepared in step (1), heat to 120° C., and stir to generate reflux. When the water produced by the reaction begins to separate from the water separator, it is counted as the start time of the esterification reaction. When completely anhydrous is separated from the water separator, the reaction is considered to have reached the end (6h). Then take a sample and measure the terminal acid value A of the reaction mixture 1 , the test stan...
Embodiment 3
[0032] (1) The preparation method of the composite catalyst: Weigh 10 g of zinc acetate and 50 g of antimony trioxide in a 50 ml beaker, perform electromagnetic stirring at room temperature, mix evenly, and set aside.
[0033] (2) Esterification reaction: add 0.2mol citric acid, 1.2mol palmityl alcohol, 0.076mol hexanaphthene in the 500ml four-necked bottle that is equipped with temperature control oil bath, agitator, water trap, reflux condenser and heat to Stir at 250°C, after the citric acid is completely dissolved and mixed evenly with palmitic alcohol, take a sample to measure the initial acid value A 0 , and then add 0.34 g of the composite catalyst prepared in step (1), heat to 210° C., and stir to generate reflux. When the water produced by the reaction begins to separate from the water separator, it is counted as the start time of the esterification reaction. When completely anhydrous is separated from the water separator, the reaction is considered to have reached t...
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