Synthesis method of polyglyceryl fatty acid monoesters
A polyglycerol fatty acid and synthesis method technology, applied in chemical instruments and methods, and other chemical processes, can solve the problems of short anti-fog duration, slightly expensive price, easy decomposition, etc., achieve high market and application prospects, and be easy to separate Detection, excellent effect of performance
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Embodiment 1
[0019] A kind of synthetic method of polyglycerol fatty acid monoester, described method comprises the following steps:
[0020] (1) For the preparation of monoglyceride laurate, in a four-neck flask equipped with a reflux condenser, a thermometer and a stirring device, add lauric acid, 0.4% NaOH solution of the catalyst, and solvent toluene, wherein the volume of the solvent toluene is lauric acid 3 times the volume, fully stirred and raised the temperature to reflux the toluene for 30 minutes, slowly added glycidol dropwise to the system, wherein the molar ratio of glycidol to lauric acid was 1.2:1; every 1 hour, take a sample once, measure the reactant acid value, when the acid value is less than or equal to 2, the reaction is terminated and the heating is stopped to obtain the monoglyceride laurate;
[0021] (2) Synthesis of polyglycerol fatty acid monoester, monolaurate monoglyceride and catalyst 4% NaCO 3 Put it into a four-necked flask, heat to control the reaction at ...
Embodiment 2
[0028] A kind of synthetic method of polyglycerol fatty acid monoester, described method comprises the following steps:
[0029] (1) For the preparation of monoglyceride laurate, in a four-neck flask equipped with a reflux condenser, a thermometer and a stirring device, add lauric acid, 0.4% NaOH solution of the catalyst, and solvent toluene, wherein the volume of the solvent toluene is lauric acid 5 times the volume, fully stirred and then heated up to reflux the toluene for 30 minutes, and slowly added glycidol dropwise to the system, wherein the molar ratio of glycidol to lauric acid was 1.5:1; every 1 hour, take a sample once, measure the reactant acid value, when the acid value is less than or equal to 2, the reaction is terminated and the heating is stopped to obtain the monoglyceride laurate;
[0030] (2) Synthesis of polyglycerol fatty acid monoester, monolaurate monoglyceride and catalyst 4% NaCO 3 Put it into a four-neck flask, heat to control the reaction at 150°C,...
Embodiment 3
[0037] A kind of synthetic method of polyglycerol fatty acid monoester, described method comprises the following steps:
[0038] (1) For the preparation of monoglyceride laurate, in a four-neck flask equipped with a reflux condenser, a thermometer and a stirring device, add lauric acid, 0.4% NaOH solution of the catalyst, and solvent toluene, wherein the volume of the solvent toluene is lauric acid 4 times the volume, after fully stirring, raise the temperature to reflux the toluene for 30min, slowly add glycidol dropwise to the system, wherein the molar ratio of glycidol to lauric acid is 1.3:1; acid value, when the acid value is less than or equal to 2, the reaction is terminated and the heating is stopped to obtain the monoglyceride laurate;
[0039] (2) Synthesis of polyglycerol fatty acid monoester, monolaurate monoglyceride and catalyst 4% NaCO 3 Put it into a four-necked flask, heat and control the reaction at 140°C, melt and react for 6 hours, then slowly add glycidol...
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