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Preparation method of sodium carboxymethyl starch with high substitution degree

A technology of sodium carboxymethyl starch and high degree of substitution is applied in the field of preparation of simultaneous carboxymethylation reaction after oxidation, which can solve the problems of poor transparency of paste liquid, low degree of substitution, easy delamination and the like, and achieves the production process. Simple application, high degree of substitution, good water retention effect

Inactive Publication Date: 2011-08-10
ZAOZHUANG LINMEI DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Used in fruit juice beverages, it can prevent precipitation and increase the yield, which cannot be replaced by other modified starches. However, the sodium carboxymethyl starch on the market generally has a low degree of substitution, poor transparency of the paste, and easy Disadvantages such as delamination and deterioration

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] First, 3000L89% ethanol, 1000Kg starch, 80Kg sodium hydroxide, 2Kg oxidant: hydrogen peroxide were added to the reactor to stir, the temperature was controlled at 35°C, and the reaction was carried out for 1.5 hours; then the solution was prepared with 280Kg sodium hydroxide and 2000L89% ethanol, and Prepare solution with 360Kg chloroacetic acid and 1000L 89% ethanol, add it to the kettle within 1 hour, control the temperature at 55°C, react for 3.5 hours, cool to 30°C, neutralize with acid, centrifuge, wash and deliquify, and dry until the water content is ≤ 10% and 80-mesh sieve, then pack to get the finished product.

Embodiment 2

[0031] First, 1800L89% ethanol, 1000Kg starch, 50Kg sodium hydroxide, 1Kg oxidant: hydrogen peroxide were added to the reactor and stirred, the temperature was controlled at 33°C, and the reaction was carried out for 1 hour; then the solution was prepared with 100Kg sodium hydroxide and 1000L89% ethanol, and Prepare solution with 150Kg chloroacetic acid and 700L 89% ethanol, add it to the kettle within 1 hour, control the temperature at 45°C, react for 5 hours, cool to 30°C, neutralize with acid, centrifuge, wash, deliquify, and dry until the water content is ≤ 10% and 80-mesh sieve, then pack to get the finished product.

Embodiment 3

[0033] First, 4000L of 89% ethanol, 1000Kg of starch, 80Kg of sodium hydroxide, 4Kg of oxidant: hydrogen peroxide were added to the reactor to stir, and the temperature was controlled at 35°C for 1 hour of reaction; then the solution was prepared with 600Kg of sodium hydroxide and 2800L of 89% ethanol, and Prepare solution with 550Kg chloroacetic acid and 1500L 89% ethanol, add it to the kettle for 1 hour, control the temperature at 50°C, react for 4 hours, cool to 30°C, neutralize with acid, centrifuge, wash and deliquify, and dry until the water content is ≤10 %, sieved with a 100-mesh sieve, and packaged to obtain the finished product.

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Abstract

The invention relates to a preparation method of sodium carboxymethyl starch with high substitution degree, comprising the following steps of: preparing chemical products by taking starch as a raw material and ethanol as a reaction medium and adding the chemical products into a closed enamel reaction kettle, and controlling reaction temperature and time; and then centrifuging to remove liquid, wash, dry, screen, package and other process steps to prepare the sodium carboxymethyl starch. The finished product is white or yellowish powder, has stink and ordor, can be dissolved in cold water, andhas favorable solution transparency and stable viscosity; the sodium carboxymethyl starch has the advantages of simple and applicable production process, high reaction efficiency, reduction on the consumption of chemical products to the maximum extent, no three wastes and production cost saving; in addition, the sodium carboxymethyl starch is applied to a plurality of starch raw materials.

Description

Technical field: [0001] The invention relates to a preparation method of double-modified starch, in particular to a preparation method of simultaneous carboxymethylation after oxidation. Background technique: [0002] Sodium carboxymethyl starch is a good emulsifier, thickener and stabilizer. Generally, carboxymethyl starch with a degree of substitution of 0.25 to 1.30 shows excellent stability. It is often used as a thickener and suspension in the food industry. agent, stabilizer, the paste has good transparency, strong cohesiveness, no retrogradation, and good freeze-thaw stability. It is widely used in food industry, paper industry, textile and other fields. The product is soluble in cold water, The glue is transparent, delicate, good fluidity, not easy to be spoiled and mildewed, and it is mainly used as a wet end additive in papermaking, as a paper strengthening agent; a small amount of this product is added in the food industry, the effect is very significant, and it c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08B31/00A23L2/52C08B31/18C08B31/12
Inventor 李永峰
Owner ZAOZHUANG LINMEI DEV
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