Method for preparing tributyrin by utilizing PVC (Polyvinyl Chloride) reisn-supported heteropolyacid catalyst

[0021] Embodiment 1: a kind of method that utilizes the catalyst of PVC resin load heteropolyacid to prepare tributyrin, described method is as follows: Glycerin, butyric acid and water-carrying agent are pre-mixed, preheated, then enter and be filled with catalyst The esterification reaction is carried out in the reaction column, the temperature of the esterification reaction is controlled between 140-150°C, and the reaction time is 18-20h; the catalyst used is a catalyst of macroporous PVC resin loaded with phosphotungstic acid; after the esterification reaction, vacuum distillation is used to remove Butyric acid is removed, and the removed butyric acid is returned to the reactor for recycling; zinc stearate is used as an acid-binding agent to absorb residual butyric acid to remove the butyric acid odor;

[0022] Then use active carbon to decolorize and deodorize, and refine to obtain tributyrin finished product with a content greater than or equal to 98.5%.

[0023] The cat...

[0024] Embodiment 2: a kind of method that utilizes the catalyst of PVC resin load heteropolyacid to prepare tributyrin, described method is as follows: Glycerin, butyric acid and water-carrying agent are pre-mixed, preheated, then enter and be filled with catalyst The esterification reaction is carried out in the reaction column, the temperature of the esterification reaction is controlled at 145°C, and the reaction time is 22 hours; the catalyst used is a catalyst of macroporous PVC resin loaded with silicotungstic acid; after the esterification reaction, the butyric acid is removed by vacuum distillation, and the The removed butyric acid is returned to the reactor for recycling; then calcium stearate is used as an acid-binding agent to absorb the residual butyric acid to remove the butyric acid odor; then activated carbon is used for decolorization and deodorization, and refined to obtain tributyrin finished product , the content is greater than or equal to 98.5%.

[0025] ...

[0026] Embodiment 3: a kind of method that utilizes the catalyst of PVC resin load heteropolyacid to prepare tributyrin, described method is as follows: Glycerin, butyric acid and water-carrying agent are pre-mixed, preheated, then enter and be filled with catalyst The esterification reaction is carried out in the reaction column, the temperature of the esterification reaction is controlled at 135 ° C, and the reaction time is 24 hours; the catalyst used is a catalyst of macroporous PVC resin loaded with silicotungstic acid; after the esterification reaction, the butyric acid is removed by vacuum distillation, and the removed The removed butyric acid is returned to the reactor for recycling; then molecular sieves are used as an acid-binding agent to absorb the residual butyric acid to remove the butyric acid odor; Equal to 98.5%.

[0027] The catalyst in this example is prepared by using macroporous PVC resin to load heteropolyacid by precipitation adsorption method, filtering...