Method for extracting ellagic acid from pomegranate bark by enzyme hydrolysis method
A technology of pomegranate peel and ellagic acid, applied in the direction of organic chemistry, can solve the problems of low conversion rate, complicated technical operation, long extraction time, etc., and achieve the effect of improved product quality, simple process and good product quality
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Embodiment 1
[0027] The treatment of the raw materials is charcoal frying: remove impurities, wash, slice, and dry the original pomegranate peel in a hot pot at 300°C until the skin is dark brown and the inside is burnt brown, sliced or crushed for later use;
[0028] Extraction: Add 8 times of water to the scorched pomegranate peel slices, add 0.3 parts of enzyme solution, soak at room temperature for 2 hours, then heat the mixture of the two to 90°C, keep it warm for 2 hours, and do two or more times in a row. Take the liquid from the filter residue, combine and concentrate, the weight ratio of the concentrated liquid is 2:1 according to the raw material ratio, and it is an extract;
[0029] Oxidative dehydrogenation: the above liquid extract is hydrolyzed with hydrogen peroxide, the weight ratio of hydrogen peroxide to the liquid extract is 20:1, the hydrogen peroxide aqueous solution is taken, the recovered liquid is concentrated, and the volume of the obtained liquid is 1 / 8 of the hy...
Embodiment 2
[0034] After enzymatic hydrolysis and concentration in the extraction step, take 1 volume of 80% acetone, add the concentrated solution to 1 volume of 80% acetone, keep warm at 80°C for 1 hour, filter the residue, add acetone to the filter residue, keep warm and filter again , and then repeat the process, a total of three times acetone extraction; filter residue liquid, combined and concentrated; to obtain extracts.
Embodiment 3
[0036] The treatment of the raw materials is charcoal frying: remove impurities, wash, slice, and dry the original pomegranate peel in a hot pot at 200°C until the skin is dark brown and the inside is burnt brown, sliced or crushed for later use;
[0037] Extraction: add 5 times of water to the scorched pomegranate peel slices, add 0.1 part of enzyme solution, soak at room temperature for 6 hours, then heat the mixture of the two to 100°C, keep it warm for 4 hours, two or more times in a row, Take the liquid from the filter residue, combine and concentrate, the weight ratio of the concentrated liquid is 3:1 according to the raw material ratio, and it is an extract;
[0038] Oxidative dehydrogenation: the above liquid extract is hydrolyzed with hydrogen peroxide, the weight ratio of hydrogen peroxide to the liquid extract is 20:1, the hydrogen peroxide aqueous solution is taken, the recovered liquid is concentrated, and the volume of the obtained liquid is 1 / 6 of the hydrogen ...
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