Method for extracting algal polysaccharides through continuous phase change

• Main Authors: LEI DAQING, HE BAOWEN, DENG CHUYAO, CAO YONG, LEI SIJIA, DAI WEIJIE, SONG MINGYUE, WANG QUN
• Format: Patent
• Language: Chinese; English
• Published: 22.10.2021
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; DERIVATIVES THEREOF; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; POLYSACCHARIDES; THEIR PREPARATION OR CHEMICAL WORKING-UP

The invention belongs to the technical field of natural product extraction, and particularly relates to a method for extracting algal polysaccharides through continuous phase change. The method comprises the following steps: S1, drying and crushing laver to obtain a dry laver raw material; S2, filling dry laver into an extraction kettle of a continuous phase-change extraction device, compressing an extraction agent into liquid by a high-pressure pump under the condition that the pressure and the temperature are always lower than the critical pressure and the critical temperature of the extraction agent, enabling the liquid to flow through the extraction kettle at a certain flow speed to extract algal polysaccharides, then enabling the liquid to enter a desorption kettle, performing phase-change on the extraction agent into gas through heating and pressure reduction, performing instant compression to change the gas into liquid, enabling the liquid to flow through the extraction kettle, extracting the material