Patent ID: 9447199
Filing Date: 2016-09-20
CPC Classification: A61P,C08B,C08L

Claim Text:
1. A process of extracting brown algae active polysaccharides via a microwave chemistry method, wherein the process comprises the following steps: a) putting pulverized brown algae raw materials into a microwave reactor chamber, adding an acid solution of a mass concentration of 5% to 99% to the chamber, subjecting a mixture of the pulverized brown algae raw materials and the acid solution for 5 to 120 minutes to a microwave power of mass power density of 1 kilowatt per kilogram of material to 10 kilowatts per kilogram of material under a work pressure of 20 mmHg to 760 mmHg, and then washing the mixture with an organic solvent to remove excess acid; b) adding an aqueous solution into the product obtained from step a) for extraction, concentrating the extracting solution, adjusting pH to neutral by a base, conducting graded alcohol precipitation to respectively obtain mannuronic acid-rich fragment algin, fucoidan, and laminaran; and remaining brown algae residue; and c) adding an alkali solution to the brown algae residue of step b), conducting alkaline digestion reaction at a temperature of 35 to 60° C. for 20 to 80 minutes, filtering the residue off, adjusting pH of the filtrate to neutral, conducting alcohol precipitation to obtain guluronic acid rich fragment (G rich) algin precipitates.