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A method for extracting active polysaccharides from grain seed coats assisted by hot-pressed steam explosion method

An active polysaccharide and auxiliary treatment technology, which is applied in the field of deep processing of agricultural and sideline products, can solve the problems of low yield, inability to realize industrial production, and high cost, and achieve high efficiency, improved yield and purity, and low energy consumption.

Active Publication Date: 2015-12-30
INST OF AGRO FOOD SCI & TECH CHINESE ACADEMY OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the whole, the current extraction of active polysaccharides from grain seed coats generally has the problems of low yield and high cost, and large-scale industrial production cannot be realized.

Method used

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  • A method for extracting active polysaccharides from grain seed coats assisted by hot-pressed steam explosion method
  • A method for extracting active polysaccharides from grain seed coats assisted by hot-pressed steam explosion method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1: the preparation of wheat seed coat active polysaccharide

[0024] (1) Removal of starch and protein from wheat seed coats: disperse the wheat seed coats in water before blasting treatment, wash and sieve repeatedly to remove the endosperm entrained in the seed coats and the starch and protein therein.

[0025] (2) Remove phytic acid from the wheat seed coat: mix the wet seed coat and water after centrifugation in step (1) in a mass ratio of 1:3, and use H 2 SO 4 Adjust the pH to 5.0, maintain for 4 hours, and wash with water until neutral after centrifugation.

[0026] (3) Hot-pressed steam explosion pretreatment: the wet testa after centrifugation in step (2) is placed in the closed explosion cylinder of the hot-pressed steam explosion device to carry out steam explosion, steam explosion pressure 1.5MPa, saturated steam temperature 200 ℃, the pressure holding time is 120s, the burst cylinder piston is opened instantly to release the pressure, and the se...

Embodiment 2

[0028] Embodiment 2: the preparation of rice seed coat active polysaccharide

[0029] (1) Removal of starch and protein from rice seed coats: Disperse the rice seed coats in water before blasting treatment, wash and sieve repeatedly to remove the endosperm entrained in the seed coats and the starch and protein therein.

[0030] (2) Removal of phytic acid from the rice seed coat: mix the wet seed coat centrifuged in step (1) with water at a mass ratio of 1:4, adjust the pH to 3.5 with HCl, keep it for 12 hours, and wash it with water until neutral after centrifugation. sex.

[0031](3) Hot-pressed steam explosion pretreatment: the wet seed coat of rice after centrifugation in step (2) is placed in the closed explosion cylinder of the hot-pressed steam explosion device to carry out steam explosion, steam explosion pressure 2.2MPa, saturated steam temperature 220°C, hold pressure for 75s, open the burst cylinder instantly to relieve pressure, and put the seed coat in the air.

...

Embodiment 3

[0033] Embodiment 3: the preparation of corn seed coat active polysaccharide

[0034] (1) Removing starch and protein from corn seed coats: before blasting treatment, disperse the corn seed coats in water, wash and sieve repeatedly, and remove the endosperm and the starch and protein contained in the seed coats

[0035] (2) Remove phytic acid from corn seed coats: mix the wet corn seed coats after centrifugation with water in a mass ratio of 1:3 in step (1), and use H 2 SO 4 Adjust the pH to 4.5, maintain it for 4 hours, and wash with water until neutral after centrifugation.

[0036] (3) hot-pressed steam explosion pretreatment: the wet corn seed coat after centrifugation in step (2) is placed in the closed explosion cylinder of the hot-pressed steam explosion device to carry out steam explosion, steam explosion pressure 3.3MPa, saturated steam temperature 240°C, hold pressure for 30s, open the cylinder bursting piston to release pressure instantly, and put the seed coat in...

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Abstract

The invention belongs to the technical field of intensive processing of subsidiary agricultural products, and in particular relates to a new method for extracting cereal seed coat active polysaccharide through assisted treatment of hot-pressing steam spray explosion method. The method comprises the steps of firstly, washing crushed cereal seed coats with water to remove part of starch and protein, and then performing acid washing to remove phytic acid; then, performing hot-pressing steam spray explosion treatment, and relieving pressure instantly, wherein the steam explosion pressure is 1.5-4.6Mpa and the pressure keeping time is 10-120s; then, leaching the seed coats subjected to steam explosion by adding normal-temperature water, and enriching active polysaccharide components through ethanol precipitation with 65-75% ethanol after an extracting solution is moderately concentrated; finally, performing precipitation and drying to obtain cereal seed coat active polysaccharide. The method is simple in process, equipment is easy to operate, the extraction without alkalization of cereal seed coat active polysaccharide is realized through hot-pressing steam spray explosion assisted treatment, the yield of active polysaccharide is greatly improved, and important effects of saving energy, reducing emission and improving the economic benefit are achieved.

Description

technical field [0001] The invention belongs to the technical field of intensive processing of agricultural and sideline products, and in particular relates to a new method for extracting active polysaccharides from grain seed coats through auxiliary treatment using a hot-pressed steam explosion method. Background technique [0002] my country is a big grain producing country, and a large amount of by-products of grain seed coats are inevitably produced during the processing of grain raw materials such as wheat, corn, and rice. Cereal seed coats are rich in soluble and insoluble non-starch polysaccharides and are the best source of dietary fiber known in nature. As a major food producing country, my country has a large amount of grain seed coat resources available, but limited by the level of scientific and technological development, these by-products are still mainly used as livestock feed and microbial fermentation medium, and the active ingredients rich in them have to be...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08B37/00
Inventor 周素梅刘丽娅钟葵佟立涛周闲容赵梦丽
Owner INST OF AGRO FOOD SCI & TECH CHINESE ACADEMY OF AGRI SCI
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