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Method for synthesizing starch acetate

A technology of starch acetate and synthesis method, which is applied in the field of food biochemical industry, can solve the problems of high reaction temperature, achieve high reaction efficiency, mild conditions, and increase the cost

Active Publication Date: 2012-04-04
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the fast dry method has a short reaction time, the reaction temperature is high

Method used

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  • Method for synthesizing starch acetate

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Effect test

Embodiment 1

[0029] (1) Starch pretreatment Weigh 60g of starch into 200ml of water, swell by absorbing water at 40°C for 20 minutes, and filter.

[0030] (2) Esterification Add 90ml of water to the treated starch to prepare 40% starch milk, then add 0.36g of lipase, heat to a constant temperature of 30°C, add 5% acetic anhydride, and stir in a water bath at a constant temperature of 30°C for 10 minutes , the stirring speed was 150rpm to obtain starch acetate, and the degree of substitution of starch acetate reached 0.0302 after determination.

Embodiment 2

[0032] (1) Starch pretreatment Weigh 60g of starch into 200ml of water, swell by absorbing water at 40°C for 20 minutes, and filter.

[0033] (2) Esterification Add 90ml of water to the treated starch to make 40% starch milk, then add 0.54g of lipase, heat to 40°C constant temperature, add 9% acetic anhydride, stir in 40°C constant temperature water bath for 10min , the stirring speed was 150rpm to obtain starch acetate, and the degree of substitution of starch acetate reached 0.0426 after determination.

Embodiment 3

[0035] (1) Starch pretreatment Weigh 60g of starch into 200ml of water, swell by absorbing water at 40°C for 20 minutes, and filter.

[0036] (2) Esterification Add 90ml of water to the treated starch to prepare 40% starch milk, then add 0.36g of lipase, heat to a constant temperature of 35°C, add 9% of acetic anhydride, stir in a constant temperature water bath at 35°C for 15 minutes , the stirring speed was 150rpm, and starch acetate was obtained, and the degree of substitution of starch acetate reached 0.0733.

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Abstract

The invention belongs to the technical field of food biochemical engineering, and particularly discloses a method for synthesizing starch acetate. The method comprises the following steps of: performing esterification reaction, namely adding a certain cassava starch and water at a certain temperature, adding proper amount of lipase, stirring uniformly and heating to specified temperature, adding acetic anhydride slowly, reacting for a certain time, dehydrating, washing, drying, crushing and sieving to obtain the starch acetate product. The method has the advantages of mild condition, environment friendliness, safety, high reaction efficiency and the like in acid method production, and the product is easy to purify; and compared with other methods for preparing low-degree of substitution starch acetate, the method has the advantages of high reaction efficiency, simplicity of operation, large degree of substitution of the product and the like.

Description

(1) Technical field [0001] The invention belongs to the technical field of food biochemical industry, in particular to a method for synthesizing starch acetate. (2) Background technology [0002] Starch acetate, also known as acetylated starch, is a derivative obtained by reacting hydroxyl groups in starch macromolecules with acetic acid or other acetic acid derivatives under certain conditions. It is an important type of modified starch. The range of substitution degree DS of starch acetate includes three types: high, medium and low. Highly acetylated starch esters have a degree of substitution of 2 to 3; starch acetates with a degree of substitution ranging from 0.3 to 1 are starch acetates with a degree of substitution; and low-esterified starches are derivatives with a degree of substitution ranging from 0.01 to 0.2. Starch acetate with low substitution degree has wide application, low cost, stable performance, and is more suitable for commercialization and user...

Claims

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Application Information

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IPC IPC(8): C12P19/04
Inventor 崔波徐毅华檀琮萍曲静然
Owner QILU UNIV OF TECH
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