Method for subcritical water extraction of fucosan

The invention relates to the technical field of extraction processes of fucosan, in particular to a method for subcritical water extraction of fucosan, which comprises the following steps: subcritical extraction; cooling and filtering; removing impurities; performing concentration; performing alcohol precipitation; performing centrifugation; and drying. By adopting the method to extract the fucosan, the highest extraction rate of the fucosan can reach 5.38%, the highest total sugar content can reach 20.12% (fucosan is taken as a standard product), the highest purity can reach 28.16%, the extraction rate is obviously higher than that of various traditional extraction methods, and the method is short in extraction time, high in efficiency, excellent in physical and chemical properties, green, environment-friendly, sustainable in development and low in equipment requirement. 本发明涉及岩藻聚糖的提取工艺技术领域，特别涉及一种亚临界水提取岩藻聚糖的方法，所述方法，包括以下步骤：亚临界萃取；冷却、过滤；除杂；浓缩；醇沉；离心；干燥。采用本方法提取岩藻聚糖，其岩藻聚糖提取率最高可达5.38％，总糖含量最高可达20.12％(以岩藻糖为标品)，纯度最高可达2