A kind of preparation method of pure natural edible acorn powder

Abstract

The invention discloses a preparation method of purely-natural edible acorn starch. The preparation method comprises the following steps of performing leaching with edible alcohol under the action of stirring and ultrasonic waves for three times, and recovering tannin; performing heating and vacuum stirring in an extracting tank, and recovering alcohol; and performing superfine comminution so as to obtain acorn starch. The preparation method disclosed by the invention is used for recovering acorn tannin when being used for producing the acorn starch, wherein the recovery rate of the tannin in acorn kernels is as high as 95% or above, and 6-15kg of the acorn tannin can be obtained from each 100kg of the acorn kernels. The recovery rate of the acorn starch is as high as 98% or above, and the loss rate of the starch is low. 40-65% of the acorn starch can be obtained from each 100kg of the acorn kernels, the purity of the acorn starch is high, few impurities are generated, and pollution water is hardly generated except when equipment is cleaned. A dry method is used for production, so that the production process is not liable to pollute by mould, and the obtained acorn starch is good in quality, light in color, light in bitterness, good in mouth feel, high in utilization of the acorn kernels, good in comprehensive benefits, and good in market development potential.

Description

technical field [0001] The invention relates to a preparation method of acorn powder, in particular to a preparation method of pure natural edible acorn powder with tannin and astringency removed, and belongs to the field of food processing. Background technique [0002] Acorns are the general term for the seeds of Quercus genus Fagaceae. Every 100 grams of nuts contain 8 grams of protein, 2 grams of fat, 50-65 grams of carbohydrates, 1.3 grams of dietary fiber, 1.2 grams of ash, and 0.03 micrograms of thiamine. 7mg of vitamin C, 112mg of calcium, 64mg of phosphorus, 5.8mg of iron, 7-17g of tannin, and its starch content is as high as 60%. It is a good raw material for the production of high-grade health food. Acorn powder is a processed product of acorn kernels, which is mainly starch, which is produced by removing tannins from acorn kernels. It is the basic raw material for making acorn health food. It is rich in starch, tannins, polyphenols, Minerals, trace elements and ...

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Problems solved by technology

There are many reports in the technical literature of acorn powder wet production technology, such as "A Preparation Method of Acorn Starch" (application number CN201610571182.7) published by the State Intellectual Property Office, "Preparation Process and Application of Natural Acorn Powder" ( Application No. CN201610305819.8), and "Comparative Research on Acorn Starch Processing Technology" published by Zhang Zhijian et al. 04) etc. have made detailed introductions. The common problems of this method are that the acorn tannin components are seriously lost with alkaline water soaking, the amount of sewage is large, the sewage treatment is difficult, the pollution is serious, the production cost is high, the utilization rate of raw materials is low, and the starch Affected by alkaline water immersion, poor quality and other issues

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