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A kind of airflow premixing method for preparing rice starch phosphate monoester

A rice starch and phosphate monoester technology, which is applied in the field of starch deep processing, can solve the problems of waste of starch resources, etc., and achieve the effects of stable product quality, high degree of esterification, and uniform esterification

Active Publication Date: 2017-06-27
无锡秋可生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention aims to solve the problem of waste of starch resources caused in the rice processing process

Method used

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  • A kind of airflow premixing method for preparing rice starch phosphate monoester

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Experimental program
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Effect test

Embodiment 1

[0036] (1) Add 35 parts of sodium dihydrogen phosphate, 96 parts of disodium hydrogen phosphate and 90 parts of water, and add 8 parts of urea to make a mixed solution, adjust the pH to 5.5, and heat to 50°C;

[0037] (2) Convey 180 parts of rice starch into the air conveyor with hot air at 50°C, and use a sprayer to spray the heated orthophosphate mixed solution into a mist at the front end 1 / 3 of the air conveyor. Fully mixed with starch in the conveyor;

[0038] (3) The mixture of starch and orthophosphate mixed solution coming out from the air conveyor directly enters a fluidized bed reactor, and is heated and reacted at 150° C. for 2.5 hours;

[0039] (4) After the reaction, the reactants were washed, and then air-dried or vacuum-dried at 50° C. for 24 hours to obtain rice starch phosphate monoester with a substitution degree of 0.018.

Embodiment 2

[0041] (1) Add 30 parts of sodium dihydrogen phosphate, 100 parts of disodium hydrogen phosphate and 90 parts of water, and add 9 parts of urea to make a mixed solution, adjust the pH to 6, and heat to 45°C;

[0042] (2) Convey 180 parts of rice starch into the air conveyor with hot air at 50°C, and use a sprayer to spray the heated orthophosphate mixed solution into a mist at the front end 1 / 3 of the air conveyor. Fully mixed with starch in the conveyor;

[0043] (3) The mixture of starch and orthophosphate mixed solution coming out of the air conveyor directly enters a fluidized bed reactor, and heats and reacts at 130° C. for 4 hours;

[0044] (4) After the reaction, the reactants were washed, and then air-dried or vacuum-dried at 50° C. for 24 hours to obtain rice starch phosphate monoester with a substitution degree of 0.021.

Embodiment 3

[0046] (1) Add 40 parts of sodium dihydrogen phosphate, 85 parts of disodium hydrogen phosphate and 100 parts of water, and add 10 parts of urea to make a mixed solution, adjust the pH to 5, and heat to 30°C;

[0047](2) Convey 180 parts of rice starch into the air conveyor with hot air at 50°C, and use a sprayer to spray the heated orthophosphate mixed solution into a mist at the front end 1 / 3 of the air conveyor. Fully mixed with starch in the conveyor;

[0048] (3) The mixture of starch and orthophosphate mixed solution coming out of the air conveyor directly enters a fluidized bed reactor, and is heated and reacted at 140° C. for 3 hours;

[0049] (4) After the reaction, the reactants were washed, and then air-dried or vacuum-dried at 50° C. for 24 hours to obtain a rice starch phosphate monoester with a substitution degree of 0.015.

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Abstract

The invention relates to a method for preparing rice starch phosphate monoester by virtue of pneumatic premixing and belongs to the field of starch deep processing. The method is used for preparing the product from rice starch as the raw material in the presence of an orthophosphate as an esterifying agent and urea as a catalyst, and mainly comprises the steps of regulating the pH of the mixed solution of the orthophosphate, the urea and water to an appropriate value and then mixing the mixed solution thoroughly by use of a pneumatic conveying mixer, next, conveying the mixture to a fluidized bed reactor for esterification reaction, and finally washing and drying the product to obtain the rice starch phosphate monoester. The method for preparing the rice starch phosphate monoester by virtue of pneumatic premixing is simple in process, low in cost and suitable for industrial large-scale production, and the prepared rice starch phosphate monoester in a paste form is transparent, resistant to aging and excellent in water holding capacity, and can be used as an emulsifier, a stabilizer and a thickening agent in the field of food.

Description

technical field [0001] The invention relates to a method for preparing rice starch phosphate monoester by airflow premixing, and belongs to the field of starch deep processing. [0002] technical background [0003] Among the three major food crops of rice, wheat and corn, the starch content in rice ranks first, with a content as high as more than 70%. However, due to the constraints of multiple factors such as raw material costs and domestic consumption levels, the domestic starch industry is currently dominated by corn and potatoes, and rice starch only accounts for 13%. The potential value of its derived characteristics is gradually attracting people's attention. [0004] my country's rice has its unique advantages and occupies an important position in the domestic and foreign markets. With the improvement of living standards, people have higher and higher requirements for the taste of rice. Due to the traditional rice milling technology and the vicious cycle in the proc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08B31/06
Inventor 于秋生徐文婷冯伟刘忠义
Owner 无锡秋可生物科技有限公司
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