Method for extracting octacosanol from sorghum stems
A technology of octadecanol and sorghum, which is applied in the field of preparation of higher fatty alcohol, can solve problems such as underutilization of economic value, and achieve the effects of abundant raw materials, reduced pollution and low production cost
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Embodiment 1
[0030] Operation process see figure 1 .
[0031] After the sorghum stalks are harvested, they are mechanically crushed, and the sorghum stalks are dried at 60°C to constant weight.
[0032] Take 100g of dried sorghum stalks, add 1400ml of n-butanol, place in a Soxhlet extractor, heat to reflux for 30 minutes, filter while hot, add 1400mL of n-butanol to the filter residue, repeat this step twice, and combine the filtrates After distillation and cooling, 6 g of sorghum wax was obtained;
[0033] Take 6 g of sorghum wax in a flat-bottomed flask, add 36 ml of sodium hydroxide solution (mass concentration 10%), microwave saponification at a power of 700 w for 30 minutes to obtain a saponified product of sorghum wax, add calcium chloride equivalent to saponified lye to saturate solution, heated in a water bath at a temperature of 80°C to fully convert sodium soap into calcium soap, then cool to room temperature and filter with suction, take the filter paper and wash it with hot w...
Embodiment 2
[0036] Take 100 g of dried sorghum stalks, add 1000 ml of n-butanol, heat and reflux for 150 minutes, filter while hot, repeat this step twice for the filter residue, combine the filtrates, distill and cool to obtain 5 g of sorghum wax;
[0037] Take 5g of sorghum wax in a flat-bottomed flask, add 30 ml of 10% sodium hydroxide solution, microwave saponification for 30 minutes at a power of 700w, and obtain a saponified product of sorghum wax, add a saturated solution of calcium chloride equivalent to saponification lye, and Heat in a water bath at 80°C to fully convert the sodium soap into calcium soap, then cool to room temperature and filter with suction, wash the filter paper with hot water until neutral, and dry at 60°C to obtain a mixture of higher fatty alcohol and unsaponified sorghum wax; The mixture was extracted with acetone Soxhlet with a solvent ratio of 1:10, then the solvent after reflux was cooled to room temperature, and suction filtered after crystallization, t...
Embodiment 3
[0039] Take 100 g of dried sorghum stalks, add 1000 ml of benzene, heat and reflux for 30 minutes, filter while hot, repeat this step to extract the filter residue twice, combine the filtrates, distill and cool to obtain 3 g of sorghum wax;
[0040] Take 3g of sorghum wax in a flat-bottomed flask, add 18 milliliters of 10% sodium hydroxide solution, microwave saponification under 700w power for 30 minutes to obtain sorghum wax saponification, add a saturated solution of calcium chloride equivalent to saponified lye, and Heat in a water bath at 80°C to fully convert the sodium soap into calcium soap, then cool to room temperature and filter with suction, wash the filter paper with hot water until neutral, and dry at 60°C to obtain a mixture of higher fatty alcohol and unsaponified sorghum wax; The mixture is extracted with acetone Soxhlet with a solvent ratio of 1:10, then the solvent after reflux is cooled to room temperature, and suction filtered after the crystals are precipi...
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