Preparation method of soybean episperm pectin gel polysaccharide

A gel-like, soybean technology, applied in the field of soybean seed coat deep processing, can solve the problems of low polysaccharide retention rate, residual activated carbon, complicated decolorization methods, etc., and achieves the effects of good fluidity, reduced dosage and good decolorization effect.

Active Publication Date: 2013-08-21
BOHAI UNIV
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Problems solved by technology

[0006] The above documents 1 and 2 use complexing agents to extract pectin polysaccharides once and twice, and the pectin extraction rate is about 13%. Activated carbon adsorption decolorization and cold alkali decolorization are used. The decolorization method is complicated, activated carbon remains, and the polysaccharide As a typical characteristic of pectin polysaccharides - gelling property, according to the national standard, the content of galacturonic acid in pectin must exceed 65%, but the content of galacturonic acid in soybean seed coat polysaccharides has not yet reached this level. Standard, it is inappropriate to judge the extracted polysaccharide as "pectin"
Document 3 uses chemical methods to decolorize, and the residual hydrogen peroxide has a toxic effect, so it is not suitable for promotion

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  • Preparation method of soybean episperm pectin gel polysaccharide
  • Preparation method of soybean episperm pectin gel polysaccharide

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Such as figure 1 Shown, the method for preparing soybean seed coat pectin curdlan is as follows:

[0035] Use a universal pulverizer to pulverize the dried soybean seed coat removed by dry method, and collect the solid powder passed through a 40-mesh sieve; weigh 50 g of the crushed soybean seed coat powder, add 1 L of ethanol solution with a mass fraction of 0.5%, and stir at room temperature Treat for 30 minutes, then filter, recover ethanol, and dry the filter residue under reduced pressure; weigh 40 g of dried soybean seed coat powder after ethanol treatment, add 1 L of ammonium oxalate solution with a mass fraction of 0.2%, and perform microwave treatment. The microwave power is 200W, and the temperature is kept At 85°C, the microwave treatment time is 10 minutes; the filtrate is obtained by filtration, and the obtained filtrate is removed by microfiltration with a microporous membrane, and then concentrated to 20% of the original volume by ultrafiltration with a p...

Embodiment 2

[0037] Use a universal pulverizer to pulverize the dried soybean seed coats removed by wet method, and collect the solid powder passing through a 50-mesh sieve; weigh 67 g of the crushed soybean seed coat powder, add 1 L of ethanol solution with a mass fraction of 1%, and stir at room temperature Treat for 50 minutes, then filter, recover ethanol, and dry the filter residue under reduced pressure; weigh 50 g of dried soybean seed coat powder after ethanol treatment, add 1 L of ammonium oxalate solution with a mass fraction of 1.6%, and carry out microwave treatment. The microwave power is 300W, and the temperature is kept At 95°C, the microwave treatment time is 60min; the filtrate is filtered, and the obtained filtrate is removed by microfiltration with a microporous membrane, and then concentrated to 10% of the original volume by ultrafiltration with a polysulfone microporous ultrafiltration membrane. Membrane separation parameters: cross-flow velocity is 2cm / s, operating pre...

Embodiment 3

[0039]Use a universal pulverizer to pulverize the soybean seed coat, collect the solid powder passed through a 50-mesh sieve; weigh 50 g of the crushed soybean seed coat powder, add 1 L of ethanol solution with a mass fraction of 1.5%, stir at room temperature for 80 minutes, then filter and recover ethanol , the filter residue was dried under reduced pressure; weighed 67g of dried soybean seed coat powder after ethanol treatment, added 1L of ammonium oxalate solution with a mass fraction of 3%, and carried out microwave treatment. The microwave power was 350W, the temperature was kept at 98°C, and the microwave treatment time was 90min; the filtrate was filtered, and the resulting filtrate was removed by microfiltration with a microporous membrane, and then concentrated to 15% of the original volume by ultrafiltration with a polysulfone microporous ultrafiltration membrane. The membrane separation parameters for ultrafiltration concentration: cross-flow velocity of 6cm / s, the ...

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Abstract

The invention relates to a preparation method of soybean episperm pectin gel polysaccharide. The preparation method comprises the following specific steps of: firstly crushing soybean episperm, soaking and persistently stirring the soybean episperm with low concentration ethanol, filtering, recovering ethanol and drying retentate under reduced pressure; and adding ammonium oxalate or a component A to dried soybean episperm powder, carrying out microwave-assisted extraction, carrying out conventional filtering on the material liquid after microwave treatment to obtain filtrate, removing fine impurities by a microfiltration method, carrying out ultrafiltration and concentration on the obtained filtrate, and spray-drying the concentrated material liquid by an atomizer to obtain soybean episperm pectin polysaccharide solid powder, wherein the component A is a mixed solution of ammonium sulfate and a component B, and the component B is oxalic acid or EDTA (ethylene diamine tetraacetic acid) or citric acid. The method is low in production cost and high in extraction rate; and the prepared product solution is low in color value, has unique gel characteristics and can be widely applied tofood industry.

Description

technical field [0001] The invention belongs to the deep processing method of soybean seed coat used as food ingredients and additives, in particular to a preparation method of soybean seed coat pectin-like curdlan. Background technique [0002] Pectin polysaccharide is one of the most complex structures in the plant cell wall polysaccharide family. It has various physiological functions such as excellent gelling and emulsifying properties. It is an important food additive. It is also used in the chemical industry and pharmaceutical fields. Has a wide range of applications. At present, the raw materials for producing pectin mainly include: citrus, apple, watermelon, papaya, pumpkin and orange peel residues, sunflower trays and stems, beet pulp, etc. In the soybean deep-processing industry, in order to improve the quality of protein and oil, manufacturers generally remove the seed coat of soybeans first, and then press them to make oil and prepare soybean protein isolate. B...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08B37/06A23L1/09
Inventor 刘贺朱丹实何余堂郭晓飞李君吕彤
Owner BOHAI UNIV
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