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Corncob extract preparation method

A technology of corn cob and extract, which is applied in the field of preparation of corn cob extract, to achieve the effects of increasing the content, saving drying time and saving energy

Inactive Publication Date: 2013-12-04
张瑜
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are so many beneficial substances in corncobs, how to extract these useful ingredients as much as possible is a difficult problem, and there are few relevant reports in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A preparation method of corncob extract, comprising the following steps:

[0025] (1) Freeze-drying and crushing: Freeze the cleaned fresh corncobs at -35-45°C, then vacuum-dry them at 25°C-40°C to make the water content 2.5%, and crush them into 60 ~100 mesh particles;

[0026] (2) Enzymolysis: Add water, Bacillus subtilis and cellulase to the granules obtained in step (1), the amount of Bacillus subtilis added is 3.0×10 7 unit / g dry matter, the amount of cellulase added is 2.0×10 3 IU / g dry matter, deenzyme sterilization, drying to obtain enzymatic hydrolyzate;

[0027] (3) Extraction: add 5 times the weight of extractant ethanol to the enzymatic hydrolyzate for extraction, stir at the same time, extract 5 times, combine the extracts, and concentrate to a density of 1.0g / mL;

[0028] (4) Dry using conventional drying means.

Embodiment 2

[0030] A preparation method of corncob extract, comprising the following steps:

[0031] (1) Freeze-drying and crushing: Freeze the cleaned fresh corncobs at -35-45°C, then vacuum-dry them at 25°C-40°C to keep the water content below 3%, and crush them into 60-100 mesh particles;

[0032] (2) Enzymolysis: Add water, Bacillus subtilis and cellulase to the granules obtained in step (1), the amount of Bacillus subtilis added is 3.0×10 7 unit / g dry matter, the amount of cellulase added is 2.0×10 3 IU / g dry matter, deenzyme sterilization, drying to obtain enzymatic hydrolyzate;

[0033] (3) Extraction: add 10 times the weight of extractant acetone to the enzymatic hydrolyzate for extraction, stir at the same time, extract 3 times, combine the extracts, and concentrate to a density of 1.5g / mL;

[0034] (4) Dry using conventional drying means.

Embodiment 3

[0036] A preparation method of corncob extract, comprising the following steps:

[0037] (1) Freeze-drying and crushing: Freeze the cleaned fresh corncobs at -35-45°C, then vacuum-dry them at 25°C-40°C to keep the water content below 3%, and crush them into 20-60 mesh particles;

[0038] (2) Enzymolysis: Add water, Bacillus subtilis and cellulase to the granules obtained in step (1), the amount of Bacillus subtilis added is 3.0×10 7 unit / g dry matter, the amount of cellulase added is 2.0×10 3 IU / g dry matter, deenzyme sterilization, drying to obtain enzymatic hydrolyzate;

[0039] (3) Extraction: Add 10 times the weight of extractant ethanol to the enzymatic hydrolyzate for extraction, stir at the same time, extract 3 times, combine the extracts, and concentrate to a density of 1.5g / mL;

[0040] (4) Use belt-type vacuum drying for drying. The drying conditions are: first drying zone, temperature 80-95°C, pressure -0.07-0.085 MPa, time 5-8 minutes; second drying zone, temper...

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Abstract

The invention relates to the technical field of corncob effective constituent extraction, and provides a corncob extract preparation method. Corncobs are frozen at minus 35-minus 40 DEG C, subjected to vacuum drying at 25-40 DEG C until the water content of the corncobs is lower than 3%, and smashed; the smashed corncobs are subjected to enzymolysis; an extracting agent is added for extraction, wherein the extraction is conducted for 3-5 times; extracting solutions are combined and concentrated until the density is 1.0-1.5 g / mL; an extract is dried. By adopting the process that lyophilization is conducted before extraction, a quite high extraction ratio can be realized, useful resources are prevented from being wasted, and a conservation-minded and low-carbon society is constructed beneficially; all the steps are conducted under a low-temperature condition, therefore, components easy to decompose are effectively protected, the content of effective components is increased, and the product purity is improved beneficially; due to the fact that draper-type vacuum drying is used for drying the obtained extract, the effective components are not prone to damage at a low temperature, the continuity of the whole process is realized, drying time is shortened, and energy resources are saved.

Description

technical field [0001] The invention relates to the technical field of extracting effective components of corn cobs, in particular to a preparation method of corn cob extracts. Background technique [0002] Corncobs contain organic matter, including crude protein, crude fat, crude fiber, soluble carbohydrates, crude ash, calcium, phosphorus, etc. Especially containing many chemical organic products, such as furfural and so on. Corncob contains so many beneficial substances, how to extract these useful ingredients to the greatest possible extent is a difficult problem, and there are few relevant reports in the prior art. Contents of the invention [0003] In order to solve the above problems, the present invention provides a method for extracting corncob extract with high extraction rate. [0004] The present invention is achieved through the following measures: [0005] A preparation method of corncob extract, comprising the following steps: [0006] (1) Freeze-dry...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D307/50C07G99/00
Inventor 张瑜
Owner 张瑜
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