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Preparation method of hydroxypropyl starch

A technology of hydroxypropyl starch and starch, applied in the field of preparation of hydroxypropyl starch, can solve the problems of instability, easy aging, poor freeze-thaw stability and the like

Inactive Publication Date: 2018-06-22
JILIN COFCO BIOCHEM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Although natural starch has a wide range of uses, its inherent characteristics such as insolubility in cold water, instability of the paste under heat, acid, and shear, easy aging, poor film-forming properties and transparency, and poor freeze-thaw stability greatly limit it. its application

Method used

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  • Preparation method of hydroxypropyl starch
  • Preparation method of hydroxypropyl starch
  • Preparation method of hydroxypropyl starch

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The preparation method of hydroxypropyl starch described in the present embodiment comprises the steps:

[0031] (1) Get cassava starch and add water to prepare the starch emulsion whose mass concentration is 40wt%, stir evenly for 10min to fully disperse the starch, obtain uniform starch emulsion, and add anhydrous Na 2 SO 4 , stir evenly until fully dissolved;

[0032] (2) The above-mentioned starch emulsion is heated to 35°C in a super constant temperature water bath, and under constant stirring, the pH value of the starch emulsion is adjusted to 10.5 with 3wt% sodium hydroxide solution, and at the same time, quickly add the cassava starch dry basis Amount of 8wt% propylene oxide was reacted, and the closed container was reacted for 20h;

[0033] (3) After the reaction is finished, add 6wt% dilute sulfuric acid dropwise through the nozzle to adjust the pH of the reaction solution to 5.5, neutralize to terminate the reaction, and then centrifuge the reaction solutio...

Embodiment 2

[0040] The preparation method of hydroxypropyl starch described in the present embodiment comprises the steps:

[0041] (1) Get cassava starch and add water to prepare the starch emulsion whose mass concentration is 40wt%, stir evenly for 10min to fully disperse the starch, obtain uniform starch emulsion, and add anhydrous Na 2 SO 4 , stir evenly until fully dissolved;

[0042](2) The above-mentioned starch emulsion is heated to 40°C in a super constant temperature water bath, under constant stirring, the pH value of the starch emulsion is adjusted to 10.5 with 3wt% sodium hydroxide solution, and at the same time, quickly add The amount of 8wt% propylene oxide was reacted, and the closed container was reacted for 20h;

[0043] (3) After the reaction is finished, add 6wt% dilute sulfuric acid dropwise through the nozzle to adjust the pH of the reaction solution to 5.5, neutralize to terminate the reaction, and then centrifuge the reaction solution to separate the solid from t...

Embodiment 3

[0046] The preparation method of hydroxypropyl starch described in the present embodiment comprises the steps:

[0047] (1) Get cassava starch and add water to prepare the starch emulsion whose mass concentration is 40wt%, stir evenly for 10min to fully disperse the starch, obtain uniform starch emulsion, and add anhydrous Na 2 SO 4 , stir evenly until fully dissolved;

[0048] (2) The above-mentioned starch emulsion is heated to 45°C in a super constant temperature water bath, and under constant stirring, the pH value of the starch emulsion is adjusted to 10.5 with 3wt% sodium hydroxide solution, and at the same time, quickly add the cassava starch dry basis The amount of 8wt% propylene oxide was reacted, and the closed container was reacted for 20h;

[0049] (3) After the reaction is finished, add 6wt% dilute sulfuric acid dropwise through the nozzle to adjust the pH of the reaction solution to 5.5, neutralize to terminate the reaction, and then centrifuge the reaction sol...

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Abstract

The invention belongs to the technical field of preparation of modified starch, and particularly relates to a preparation method of hydroxypropyl starch. The preparation method of the hydroxypropyl starch provided by the invention uses tapioca starch as a raw material to react with propylene oxide under alkaline conditions to prepare tapioca hydroxypropyl starch with different hydroxypropyl contents. The hydroxypropyl content and performance of the prepared hydroxypropyl starch meet requirements in the field of market application.

Description

technical field [0001] The invention belongs to the technical field of preparation of modified starch, and in particular relates to a preparation method of hydroxypropyl starch. Background technique [0002] Starch is the main component of green plant fruits, seeds, and tubers, and is the main component of CO in the air. 2 and H 2 O is a storage polysaccharide synthesized by photosynthesis. As a renewable resource second only to cellulose, starch is the main carbohydrate in human diet and the main source of human energy. my country is a large agricultural country with rich starch resources and complete varieties, mainly including grain starch, potato starch, bean starch and other starch resources. At present, industrialized high-purity starch and its derivatives are widely used in different fields such as food, medicine, textile, papermaking, and chemical industry. Therefore, the deep processing of starch and its products has broad market prospects. [0003] Although na...

Claims

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Application Information

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IPC IPC(8): C08B31/12
CPCC08B31/12
Inventor 佟毅薛晓舟黄锦朱威宇赵国兴岳婧婧安鸿雁吴延东李义
Owner JILIN COFCO BIOCHEM
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