Natural Polysaccharide Extraction Services, Schemes and Mind Maps of Law

Download Natural Polysaccharide Extraction Services and more Schemes and Mind Maps Law in PDF only on Docsity! Natural polysaccharides are mainly extracted and separated from plants or agricultural by-products in nature, and the commonly used extraction methods are: hot water extraction, acid extraction, alkali extraction and enzymatic method. Hot water extraction method is easy to operate, but for polysaccharides that are easily soluble in water, hot water extraction method is not suitable. Acid leaching and alkali leaching method is easy to make part of polysaccharide hydrolysis, thus destroying the active structure of polysaccharide and reducing the yield of polysaccharide. Enzymatic method is to remove most of the proteins by protease decomposition first, and then extract polysaccharides from the solution, which can make the concentration process and the subsequent deproteinization process easy and time-saving, and improve the yield of crude polysaccharides and protein removal rate. Polysaccharide Extraction Process  Water extraction and alcohol precipitation method When extracting, the raw material is generally degreased and free pigmented first, then extracted with water or dilute acid, dilute alkali, dilute salt solution, and the extract is concentrated and precipitated with equal weight or several times of methanol or ethanol, propanol, to obtain crude polysaccharide.  Membrane separation method Using the different relative molecular mass of polysaccharides, mechanical separation is achieved when passing through the semi-permeable membrane. Then it is concentrated and dried at low temperature to obtain crude polysaccharide.  Ultrasonic extraction method Using ultrasonic waves to crush cell tissues to improve the solubility and leaching rate of sugars in the extraction solution, which is conducive to improving the extraction rate of sugars.  Supercritical extraction method Using CO2 and other gases to present special liquid phase characteristics under supercritical conditions to extract sugar substances from raw materials. Our Services