Production process of yeast glucan

The invention belongs to the field of yeast glucan, and particularly relates to a production process of yeast glucan, which comprises the following steps: step 1, putting yeast glucan into distilled water, uniformly stirring, then adding high-substituted hydroxy propyl cellulose, and carrying out temperature cycle treatment to obtain homogeneous turbid liquid; step 2, adding a mass wall separating agent and a tourmaline-based magnetic body into the homogeneous suspension, uniformly stirring, heating, uniformly stirring to obtain homogeneous gel, slowly dropwise adding alkali liquor until the pH is 8-9, carrying out microwave reaction for 2-4 hours, washing with water, and centrifuging to obtain an insoluble substance; step 3, adding the insoluble substance into distilled water, uniformly stirring, carrying out sealed microwave treatment for 30-60 minutes, and carrying out magnetic separation to obtain yeast glucan precursor powder; and step 4, putting the yeast glucan precursor powder into an ethanol-diethyl