Method of extracting rosemary as matural antioxidant
A natural antioxidant and anti-oxidant technology, applied in chemical instruments and methods, compositions for inhibiting chemical changes, bulk chemical production, etc., can solve problems such as difficult industrial production, affecting product yield, and large solvent consumption , to achieve the effect of facilitating industrial scale production, simple and time-saving unit operation, and reducing the loss of active ingredients
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Embodiment 1
[0018] Weigh 100 kilograms of rosemary fresh grass, distill with water steam for 2 to 4 hours to obtain 754 grams of essential oil, and coarsely pulverize the raw materials containing antioxidants after extracting the essential oil for later use. Put 100 kilograms of crushed antioxidant-containing raw materials in an extractor, add a 95% ethanol solvent, carry out forced circulation and reflux extraction for 3 times according to the ratio of material to solvent of 1:5 to 1:3, filter The extract was taken out, and the solvent was recovered by vacuum distillation to obtain 35 kg of brown extract, which was pumped into a supercritical extraction kettle for supercritical CO extraction. 2 The extraction control pressure is 30-35Mpa, the temperature is 40°C-55°C, and the extraction is carried out for 4 hours. After high-pressure separation, 25 kg of extract is obtained. The extract is spray-dried to obtain 7.8 kg of yellow product, with a yield of 7.8%.
Embodiment 2
[0020] Repeat the process of Example 1, add entrainer 95% ethanol when carrying out supercritical extraction, feed rate is 10 liters / hour, after solvent recovery, the result obtains 10.1 kilograms of spray-dried light yellow powders, yield is 10.1%.
Embodiment 3
[0022] Repeat the process of Example 1, add entrainer 95% ethanol when carrying out supercritical extraction, the feed rate is 10 liters / hour, the extraction pressure is reduced to 15-32Mpa, after the solvent is recovered, it is spray-dried, and the result is a spray-dried light yellow powder 9.8 kg, 9.8% yield
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