Method for extracting edible starch from oak seeds and obtaining byproduct tannin
A technology for edible starch and acorn kernels, applied in chemical instruments and methods, preparation of sugar derivatives, esterification of saccharides, etc., can solve the problems of large adsorption capacity, difficult desorption, low cost, etc. The effect of improving yield, reducing preparation cost and reducing extraction cost
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Embodiment 1
[0035] A method for extracting edible starch and by-product tannic acid from acorn kernels, comprising the following steps:
[0036] (1) Pretreatment of acorn kernels: collect acorn kernels, wash them with clean water at room temperature for 10 minutes, place them in a dryer, and dry them at a temperature of 30°C until the moisture content is 3%. , then place it in a pulverizer, pulverize it into powder, and then sieve it to obtain 40 mesh acorn kernel powder, which is ready for use;
[0037] (2) Preparation of tannic acid crude extract: after mixing the acorn kernel powder obtained in step 1) with extractant a according to 1g of acorn kernel powder and 30ml of extractant a, place it at a temperature of 40°C Extract in an environment for 3 hours, filter, and obtain the filtrate and filter residue; the filter residue is set aside; the filtrate is concentrated at a pressure of -0.09MPa and a temperature of 55°C for 1.5h, and edible ethanol is recovered to obtain a crude tannic a...
Embodiment 2
[0045] A method for extracting edible starch and by-product tannic acid from acorn kernels, comprising the following steps:
[0046] (1) Pretreatment of acorn kernels: collect acorn kernels, wash them with clean water at room temperature for 15 minutes, put them in a dryer, and dry them at a temperature of 40°C until the moisture content is 4%. , then place it in a pulverizer, pulverize it into powder, and then sieve it to obtain 50 mesh acorn kernel powder, which is ready for use;
[0047] (2) Preparation of crude tannic acid extract: after mixing the acorn kernel powder obtained in step 1) with extractant a according to 1g of acorn kernel powder and 25ml of extractant a, place it at a temperature of 40°C Extract in an environment for 3 hours, filter to obtain the filtrate and filter residue; the filter residue is set aside; the filtrate is concentrated for 1 hour at a pressure of -0.08MPa and a temperature of 50°C, and edible ethanol is recovered to obtain a crude tannic aci...
Embodiment 3
[0058] A method for extracting edible starch and by-product tannic acid from acorn kernels, comprising the following steps:
[0059] (1) Pretreatment of acorn kernels: collect acorn kernels, wash them with clean water at room temperature for 10 minutes, put them in a dryer, and dry them at a temperature of 30°C until the moisture content is 6%. , then place it in a pulverizer, pulverize it into powder, and then sieve it to obtain 80 mesh acorn kernel powder, which is ready for use;
[0060] (2) Preparation of tannic acid crude extract: After mixing the acorn kernel powder obtained in step 1) with extractant a according to 1g of acorn kernel powder and 20ml of extractant a, place it at a temperature of 40°C Extract in an environment for 3 hours, filter to obtain the filtrate and filter residue; the filter residue is set aside; the filtrate is concentrated at a pressure of -0.05MPa and a temperature of 45°C for 0.5h, and edible ethanol is recovered to obtain a crude tannic acid ...
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