STEARYL STEARATE CAS 2778-96-3

Method 1: Preparation of Stearyl Stearate: Add a certain amount of stearic acid, stearyl alcohol and solid acid catalyst into a 100mL three-necked bottle equipped with an electric stirrer, a thermometer, and a reflux condenser to conduct a heating reflux reaction. After the reaction, filter while hot, transfer to a small beaker, wash the product three times with 80% ethanol aqueous solution, solidify and air-dry, then vacuum-dry to obtain a white waxy solid. Calculate yield by weighing. The melting point and infrared spectrum of the product were determined. The product is a white waxy solid with a melting range of 61-63°C and a literature value of 62-64°C. The infrared spectrogram was obtained after KBr compression, and the spectrogram data analysis is as follows: 2954.1～2850.2cm-1 is the saturated C-H stretching vibration absorption peak; 1732.3cm-1 is the characteristic absorption peak of ester carbonyl C=O; 1467.6cm-1 1 is the bending vibration of methyl and methylene; 1180.6cm-1 is the stretching vibration of C-O single bond, which is in line with the characteristics of higher alcohol stearate. The above analysis can confirm that the experimental product is Stearyl Stearate.

Method 2: <Add 0.02mol of stearyl alcohol and a certain amount of stearic acid to a 250mL three-necked bottle<Then quickly add the catalyst p-toluenesulfonic acid (PTSA)<Put the three-necked bottle in the microwave cavity<Assemble the reflux device , Molecular sieve dehydrator and electric stirrer; set time <synthesis under certain microwave power; completion of reaction <wash with hot 95% ethanol solution <remove catalyst and a little impurity <get white waxy solid product <dry <weighing< Calculate the yield. The optimum conditions are: taking stearyl alcohol 0.02mol as the benchmark <the ratio of the substance of stearyl alcohol to stearic acid is 1: 1.2<catalyst consumption is 0.2g<microwave radiation power is 514W<microwave radiation time For 40min< productive rate can reach 94.35%.