A kind of equipment and method for preparing carboxymethylated rice bran polysaccharide

A rice bran polysaccharide and carboxymethylation technology, which is applied in the field of preparation of carboxymethylated rice bran polysaccharide and rice bran polysaccharide carboxymethylation reaction, can solve the problems of affecting the reaction effect and uneven energy absorption, so as to improve the antioxidant activity, High free radical scavenging capacity, enhanced antioxidant activity

Active Publication Date: 2016-08-17
SHENYANG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current ultrasonic technology generally uses ultrasonic cleaners, ultrasonic reactors, etc. The reaction liquid is in a static state under ultrasonic conditions, and the energy absorbed is uneven. The distance from the ultrasonic generator will affect the local reaction effect, so it needs to be developed. Develop a device that efficiently utilizes ultrasonic energy to achieve the purpose of saving energy and fully responding

Method used

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  • A kind of equipment and method for preparing carboxymethylated rice bran polysaccharide
  • A kind of equipment and method for preparing carboxymethylated rice bran polysaccharide
  • A kind of equipment and method for preparing carboxymethylated rice bran polysaccharide

Examples

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Effect test

Embodiment 1

[0030] refer to figure 1 , a kind of equipment for preparing carboxymethylated rice bran polysaccharide, comprising a reactor 1, a circulation pump 2, an ultrasonic generator 3, a temperature control device 4, an ultrasonic controller 5, a liquid feed port 6, a fixed feed port 7, and an outlet The feed port 8 is composed of; the top of the reactor 1 is provided with a liquid feed port 6 and a solid feed port 7, and the bottom end is provided with a discharge port 8, the temperature control device 4 is connected with the reactor 1, and the circulation pump 2 The inlet of the pump is connected to the bottom of the reactor 1, the outlet of the circulating pump 2 is connected to the ultrasonic generator 3, the outlet of the ultrasonic generator 3 is connected to the top of the reactor 1, and the ultrasonic controller 5 is connected to the ultrasonic generator 3.

[0031] The equipment is an external circulation type ultrasonic reaction device, the probes of the ultrasonic generato...

Embodiment 2

[0042] The difference with Example 1 is:

[0043] The ultrasonic treatment conditions in step d are: ultrasonic power 140W, ultrasonic time 10min, reaction temperature 40°C;

[0044] In step f, three times the volume of absolute ethanol was added to the dialyzed solution in step e, left standing at 4°C for 10 hours, centrifuged to obtain a precipitate, and vacuum freeze-dried to obtain carboxymethylated rice bran polysaccharide with a degree of substitution of 0.68.

Embodiment 3

[0046] The difference with Example 1 is:

[0047] The ultrasonic treatment conditions in step d are: ultrasonic power 180W, ultrasonic time 15min, reaction temperature 40°C;

[0048] In step f, three times the volume of absolute ethanol was added to the dialyzed solution in step e, left standing at 4°C for 10 hours, centrifuged to obtain a precipitate, and vacuum freeze-dried to obtain carboxymethylated rice bran polysaccharide with a degree of substitution of 1.39.

[0049] To the optimization of the optimal conditions of ultrasonic treatment in step d described in embodiment 1:

[0050] (1) Single factor experiment on ultrasound-assisted response

[0051] The influence of different power on the degree of substitution: under the conditions of reaction temperature of 60°C and reaction time of 20 minutes, the power of the ultrasonic wave is changed, and the power is respectively selected as 100W, 120W, 140W, 160W, 180W, and 200W. Through the determination of the degree of subs...

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Abstract

The invention discloses equipment and method for preparing carboxymethylated rice bran polysaccharide, aiming at problems that the substitution degree of the rice bran polysaccharide carboxymethlation product is low and reaction speed is slow. The equipment comprises a reactor, a circulating pump, an ultrasonic generator, a temperature control device, an ultrasonic controller, a liquid feed inlet, a solid feed inlet and a discharge outlet; the method for preparing carboxymethylated rice bran polysaccharide comprises the following steps: adding rice bran polysaccharide into a NaOH solution, then adding chloroacetic acid, reacting under an ultrasonic condition, performing pressure-reduced distillation and ethanol precipitation, and finally drying in vacuum. Through the equipment, the reaction time is shortened, the carboxymethlation efficiency is improved, and compared with the traditional water bath condition, the reaction condition adopted in the method disclosed by the invention has the advantages that the product substitution degree is increased, the free radical can be better eliminated, and the antioxidation activity is enhanced; and the technological process is simple, scientific and reasonable, and the prepared product can be further developed as an anticancer drug and a health product.

Description

technical field [0001] The invention relates to a device and method for preparing carboxymethylated rice bran polysaccharide, in particular to a carboxymethylation reaction of rice bran polysaccharide under ultrasonic conditions, and belongs to the technical field of deep processing of rice bran. Background technique [0002] Rice bran is a by-product of brown rice whitening, with an annual output of more than 100 million tons in China. The polysaccharide contained in rice bran exists in the caryopsis layer of rice, and it is one of the main nutritional components that has yet to be further developed and widely used. Natural rice bran polysaccharide has many biological activities, but the activity is weak, so it needs to further improve and improve some aspects of its activity before it has application value. The commonly used polysaccharide molecular modification methods mainly include sulfation, carboxymethylation, carboxyethylation, acetylation, phosphorylation, benzoylat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08B37/00A61P39/06A61P35/00B01J19/10
Inventor 肖志刚李哲周麟依李德敏王娜朱旻鹏袁媛段玉敏
Owner SHENYANG NORMAL UNIV
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