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

Inactive Publication Date: 2015-01-28
GUIZHOU LYUNONG BIOLOGICAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Activated carbon is a porous carbon-containing substance in activated carbon adsorption. It has a highly developed pore structure. The porous structure of activated carbon provides it with a large surface area, which can fully contact with fluid (impurity), thus endowing activated carbon with unique properties. The adsorption performance makes it very easy to achieve the purpose of absorbing and collecting impurities; the activated carbon adsorption method has the characteristics of large adsorption capacity, simple regeneration and low cost. Disadvantages of not easy to desorb

Method used

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Examples

Experimental program
Comparison scheme
Effect test

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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Abstract

The invention relates to the technical field of comprehensive utilization of oak seeds, and particularly relates to a method for extracting edible starch from oak seeds and obtaining byproduct tannin. The method comprises steps of preprocessing the oak seeds, firstly removing the tannin in the oak seeds so as to obtain crude extract of the tannin, taking the residue obtained in the preparation of the crude extract of the tannin as the raw material to prepare the starch, finally purifying the tannin. The yield of the prepared starch is 30-32%, the content of the starch is 71-73%, the content of the tannin in the starch is lowered to 0.5-0.58% from 7-8% in the raw material, wherein the 0.5-0.58% of tannin is safe and edible, furthermore, the yield of the extracted tannin is 5.83-5.98%, the purity of tannin is 83-84%, in the whole process, the recycling rate of the tannin in the raw material is 70-75%.

Description

technical field [0001] The invention relates to the technical field of comprehensive utilization of acorn kernels, in particular to a method for extracting edible starch from acorn kernels and producing tannic acid by-product. Background technique [0002] Acorn is a general term for the fruits of Fagaceae, deciduous Quercus deciduous species and evergreen evergreen species of Quercus. There are more than 900 species in 8 genera in the world, and 301 species in 6 genera in my country. Oak trees are widely distributed in my country. It can be said that except for the perennial snow-covered mountains and glacial tundra, they are distributed in mountainous areas in various places, but there are differences in specific species depending on the climate and soil environment. The famous oak trees in the north include Quercus liaotungen and Quercus mongolica, in the south there are Quercus chinensis, Quercus alpine, and Quercus spinosa, and in the south there are Quercus cork, Quer...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B30/00C07H13/08C07H1/08
Inventor 李丹胡哲伟
Owner GUIZHOU LYUNONG BIOLOGICAL TECH CO LTD
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