Process for preparing hydroxy propyl distarch phosphate

By using anhydrous sodium sulfate and dilute alkali in the preparation process of hydroxypropyl distarch phosphate to adjust the pH value and increase the cross-linking reaction, the viscosity and acid resistance of the product are improved, and the problem of insufficient performance of the existing products is solved. The production of high-quality products and wastewater recycling are achieved.

CN109485741AInactive Publication Date: 2019-03-19GUANGXI GAOYUAN STARCH
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Patent Information

Application Number
CN201811640793.8
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2018-12-29
Publication Date
2019-03-19
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

The existing hydroxypropyl distarch phosphate has poor viscosity and acid resistance, making it difficult to meet the high-performance needs of thickeners in the food industry.

Method used

Anhydrous sodium sulfate is used as a swelling inhibitor, and dilute alkali is used to adjust the pH value. Propylene oxide and starch undergo a bimolecular prophilic reaction under alkaline conditions to activate the starch hydroxyl groups, and improve the process technology to increase the cross-linking reaction and increase the degree of substitution. and product quality, while achieving recycling and reuse through wastewater recovery and environmental treatment.

Benefits of technology

The hot paste stability, cold lake stability and acid resistance of the product are significantly improved. The product quality reaches moisture ≤ 15%, residual sulfur dioxide ≤ 30 mg/kg, residual phosphate ≤ 0.04%, hydroxypropyl ≤ 7.0% g/100g. The wastewater utilization rate reaches more than 90%.

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Abstract

The invention discloses a process for preparing hydroxy propyl distarch phosphate. The process comprises the following steps: 1, injecting process water into a feeding pool, adding cassava starch, regulating the starch milk concentration, then adding the regulated starch milk into a reaction tank, adding anhydrous sodium sulfate, regulating the pH value with a dilute alkali solution, and adding protein powder. According to the process disclosed by the invention, the anhydrous sodium sulfate serves as an expansion inhibitor, the pH value is regulated with dilute alkali, and a bimolecular hydrophilic reaction is carried out between epoxypropane and starch under alkaline conditions, so that the starch hydroxyl is activated, the etherification reaction is improved, and the substitution degreeis further improved; and by directly increasing a cross-linking reaction in the original hydroxypropyl starch process, the process for preparing hydroxy propyl distarch phosphate is developed.
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