Preparation method and application of Poria cocos acidic polysaccharide
The technology of acid polysaccharide and tuckahoe is applied in the field of preparation of tuckahoe acid polysaccharide, which can solve the problems of unfavorable conversion large-scale production, difficulty in continuous production and high viscosity of extracting liquid, and achieve the effects of saving medicinal materials, environmental protection of the process and simple equipment.
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[0023] Example 1 Preparation of Poria cocos acidic polysaccharide
[0024] (1) 100kg of Poria cocos medicinal materials, put in an extraction tank, add 720L of 95% ethanol, reflux for 3 times, 3 hours each time, dry the drug residue, crush, pass through an 80 mesh sieve to obtain Poria powder;
[0025] (2) Take Poria powder, add 1500L of 0.25mol / L sodium hydroxide solution under rapid stirring, basify at 20°C for 4 hours, filter to obtain alkaline extract;
[0026] (3) The alkaline extract is adjusted to pH 5-7 with 2 mol / L hydrochloric acid, the precipitate is separated by centrifugation, and the precipitate is washed successively with water and ethanol, dried to completeness, and crushed to obtain 70.2Kg of Poria acid polysaccharide powder.
Example Embodiment
[0027] Example 2 Preparation of Poria cocos acidic polysaccharide
[0028] (1) 100kg of Poria cocos medicinal materials, placed in an extraction tank, added 1000L of 85% ethanol, refluxed for 4 times, 2 hours each time, dried, crushed, and passed through a 100-mesh sieve to obtain Poria powder;
[0029] (2) Take Poria powder, add 4500L 0.95mol / L potassium hydroxide solution under rapid stirring, basify at 50℃ for 8 hours, filter to obtain alkali extract;
[0030] (3) The alkaline extract is adjusted to pH 5-7 with 2mol / L hydrochloric acid, the precipitate is separated by centrifugation, the precipitate is washed with water and ethanol successively, dried to completeness, and crushed to obtain 62.6Kg of Poria acidic polysaccharide powder.
Example Embodiment
[0031] Example 3 Preparation of Poria cocos acidic polysaccharides
[0032] (1) 100kg of Poria cocos medicinal materials, put in an extraction tank, add 1200L of 80% ethanol, reflux extraction for 2 times, 4 hours each time, the dregs are dried, crushed, and passed through a 140 mesh sieve to obtain Poria powder;
[0033] (2) Take Poria powder, add 2000L of 0.65mol / L sodium carbonate solution under rapid stirring, basify at 40℃ for 12 hours, filter to obtain alkali extract;
[0034] (3) The alkaline extract is adjusted to pH 5-7 with 2 mol / L hydrochloric acid, the precipitate is separated by centrifugation, the precipitate is washed successively with water and ethanol, dried to completeness, and crushed to obtain 55.1Kg of Poria acid polysaccharide powder.
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