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Method for producing organic phosphate starch

A starch and phosphate ester technology, which is applied in the field of phosphate esterified starch preparation, can solve the problems of high energy consumption, practical limitations, and low esterification reaction efficiency, so as to reduce energy consumption, improve esterification reaction efficiency, and facilitate the process. The effect of controlling

Inactive Publication Date: 2007-09-05
海南中科翔新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This high-temperature solid-state reaction has the disadvantages of high energy consumption and difficult process control
In addition, although the general "wet" process has the advantages of low reaction temperature, mild process, and uniform product quality, it is greatly limited in practice due to the low efficiency of the esterification reaction and the low content of combined phosphorus in the product.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Add 100Kg water and 80Kg corn starch into the reactor to make starch milk, then add 2.0Kg sodium phosphate, 1.6Kg sodium dihydrogen phosphate, 2.8Kg disodium hydrogen phosphate, 2Kg stearic acid polyoxyethylene ether, keep The stirring speed was 45 rpm, the temperature was raised to 30°C, the pH value was adjusted to 6.5, and the reaction was completed at a constant temperature for 3 hours. After centrifugation and air drying, the phosphated starch was obtained. The combined phosphorus content was 0.04%, and the whiteness was 90%.

Embodiment 2

[0025] Add 110Kg water and 80Kg cornstarch into the reactor to make starch milk, then add 5.8Kg sodium dihydrogen phosphate, 1.4Kg disodium hydrogen phosphate, 1.8Kg stearic acid polyoxyethylene ether, and keep the stirring speed at 60 rpm , the temperature was raised to 60°C, the pH value was adjusted to 5.0, and the reaction was completed at a constant temperature for 10 hours. After centrifugation and air drying, the phosphorylated starch was obtained. The combined phosphorus content was 0.15%, and the whiteness was 91%.

Embodiment 3

[0027] Add 100Kg water and 80Kg cornstarch into the reactor to make starch milk, then add 9.6Kg sodium dihydrogen phosphate, 1.2Kg disodium hydrogen phosphate, 2.5Kg stearic acid polyoxyethylene ether, and keep the stirring speed at 40 rpm , the temperature was raised to 58°C, the pH value was adjusted to 5.0, and the reaction was completed at a constant temperature for 8 hours. After centrifugation and air drying, the phosphated starch was obtained. The combined phosphorus content was 0.19%, and the whiteness was 93%.

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Abstract

A process for preparing the phosphoesterified starch includes such steps as proportionally adding phosphate mixture and polyoxyvinyl ether stearate as promoter to the starch milk, regulating pH=5.0-6.5, reacting for 3-10 hr, centrifugal separation, and drying.

Description

technical field [0001] The invention relates to a polysaccharide polymer, in particular to a method for preparing phosphated starch. Background technique [0002] Starch is a renewable agricultural primary processing product with stable and abundant sources and obvious cost-effective advantages. As a natural polysaccharide polymer, starch is widely used as an industrial raw material. In actual production, starch macromolecules are modified by means of heat, acid, alkali, oxidation, and enzyme preparations to obtain better product performance. Starch modified products are widely used in food, medicine, papermaking, textiles and other fields . [0003] Phosphated starch is a kind of starch modified product, which is anionic, insoluble or slightly soluble in water, and the paste liquid has transparency, good viscosity stability (acid resistance, heat resistance, shear resistance), retrogradation Weak, non-toxic and odorless, clear fragrance and other characteristics. It is u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B31/02
Inventor 陈玉放马艳芳陈亚席陈文宁
Owner 海南中科翔新材料科技有限公司
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