Soluble starch from sweet potato

Soluble starch is a kind of white or light yellow powder, odorless and tasteless, insoluble in cold water, but it can become a transparent solution in hot water and does not freeze after cooling. generally, rice, corn, millet and potato starch can be used to make soluble starch, but the quality of soluble starch made from sweet potato starch is the best. The granules of sweet potato starch are thicker, and the outer film is easy to break and dry during hydrolysis. The processing process is as follows:

Take a certain amount of sweet potato starch through 80 mesh fine sieve, put it in a large vat, add 8% of 9% hydrochloric acid, stir the solution into a thin paste, soak at 40-45 degrees Celsius for 24 hours, or leave it at room temperature for 6-7 days. Stir every 2 hours. After the impregnation is finished, drain the clear liquid from the upper layer of the cylinder by siphon, then wash it several times and stir continuously until there is no chloride ion. Then it is dehydrated and dried, and finally it is ground by stone to pass through the sieve hole with a weight of 100 to 120 mesh, that is, soluble starch.