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One-step method of preparing oxidated carboxymethyl starch sodium from sweet potato starch

A technology for oxidizing carboxymethyl and sweet potato starch, which is applied in the field of preparing oxidized carboxymethyl starch sodium from sweet potato starch in one-step method, can solve the problems of complicated reaction steps, high preparation cost, time-consuming and energy consumption, and achieve fast reaction speed and low cost. Low, shortened reaction time effect

Inactive Publication Date: 2007-03-07
NANCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of the conventional process method is that the reaction steps are relatively complicated (three steps are required), and it needs to go through the steps of secondary neutralization, washing, drying, crushing, etc., so it is time-consuming and energy-consuming, and the preparation cost is high.

Method used

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Examples

Experimental program
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Effect test

example 1

[0007] 1. Dissolve 90g of monochloroacetic acid in 660ml of absolute ethanol to make a monochloroacetic acid ethanol solution for later use.

[0008] 2. Dissolve 60g of sodium hydroxide in 240ml of water to prepare a sodium hydroxide solution for later use.

[0009] 3. Weigh 162g of sweet potato starch, add it into a reactor with a stirring reflux constant temperature device, then add all the above-mentioned monochloroacetic acid ethanol solutions, after stirring evenly, slowly add all the above-mentioned sodium hydroxide solutions, and then add 0.16g 30 % hydrogen peroxide solution, and carry out oxidation, alkalization and etherification reactions at the same time, the reaction temperature is controlled at 50°C±1°C, and the reaction time is 1.75h. At the end of the reaction, add 1ml of saturated sodium sulfite solution, then neutralize with hydrochloric acid (1:1) until the pH value is 7, filter with a 300-mesh nylon filter cloth, and the filter cake is fully washed 4 times ...

Embodiment 2

[0011] 1. Dissolve 75g of monochloroacetic acid in 620ml of absolute ethanol to make monochloroacetic acid ethanol solution.

[0012] 2. Dissolve 54g of sodium hydroxide in 180ml of water to prepare a sodium hydroxide solution for later use.

[0013] 3. Weigh 162g of sweet potato starch, add it into a reactor with a stirring and reflux constant temperature device, then add all the above-mentioned monochloroacetic ethanol solutions, after stirring evenly, slowly add the above-mentioned sodium hydroxide solution, and then add 0.16g of 30% Hydrogen peroxide solution, oxidation, alkalization and etherification reactions are carried out at the same time, the reaction temperature is controlled at 50°C ± 1°C, and the reaction time is 2h. At the end of the reaction, add 1ml of saturated sodium sulfite solution, then neutralize with hydrochloric acid (1:1) until the pH value is 7, filter with a 300-mesh nylon filter cloth, and the filter cake is fully washed 4 times with 80% ethanol so...

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PUM

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Abstract

The invention discloses a preparing method of sodium starch carboxymethyl oxide based on sweet potato starch, wherein the oxidant is 30% hydrogen peroxide; the alkalizer is sodium hydroxide; the etherifying agent is monochloroacetic acid; the solvent is anhydrous alcohol; these reactions are proceeded in the same reactor simultaneously.

Description

technical field [0001] The invention relates to a method for preparing sodium oxidized carboxymethyl starch from sweet potato starch in one step Background technique [0002] Sodium oxidized carboxymethyl starch (OCMS for short) is a new type of composite modified starch, which is white powder in appearance and has multiple properties of oxidized starch and carboxymethyl starch. It has good hydrophilicity and binding force, and can be used as Thickeners, emulsifiers, fillers, precipitants, additives, enhancers, quality improvers, stabilizers, adhesives, etc. are widely used in petroleum, textile, paper, building materials, food, medicine, feed, chemical, daily Chemicals, tobacco, metallurgy, environmental protection, coatings, rubber, casting, agriculture and many other fields. The preparation method of oxidized carboxymethyl starch sodium usually adopts the conventional method of three-step reaction of oxidation first, then alkalization and etherifi...

Claims

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Application Information

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IPC IPC(8): C08B31/18
Inventor 曹凯光刘文明潜学基张宁陈少平谌伟庆潜勤
Owner NANCHANG UNIV
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