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High-purity sodium carboxymethyl starch, preparation method thereof and application thereof

A high-purity technology of sodium carboxymethyl starch, applied in the field of preparation and application of high-purity sodium carboxymethyl starch, can solve problems such as unusable, low purity, and application industry restrictions, achieve short production time and improve reaction efficiency , the effect of improving work efficiency

Active Publication Date: 2011-03-30
SHANDONG YITENG NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the low purity, the application industry is limited, such as printing and dyeing, petroleum and other industries cannot be used

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Carry out following steps successively to carry out the preparation of high-purity sodium carboxymethyl starch:

[0045] The first step: inject 160 parts of ethanol with a concentration of 90% into the reaction kettle, and at the same time, put in 40 parts of NaOH, raise the temperature to 35°C, and stir continuously for 15 minutes under constant temperature to make NaOH solution;

[0046] Step 2: Wet 120 parts of starch with soft water, put it into the reaction kettle, stir continuously for 60 minutes at a constant temperature of 35°C, and carry out alkalization;

[0047] Step 3: After alkalization, vacuumize and put 30 parts of chloroacetic acid with a concentration of 95% into the reactor, stir continuously for 20 minutes, then raise the temperature to 54±1°C and stir continuously for 35 minutes to carry out an etherification reaction, and then raise the temperature To 65±1°C, constant temperature and continuous stirring for 50min to carry out the secondary etherific...

Embodiment 2

[0051] Carry out following steps successively to carry out the preparation of high-purity sodium carboxymethyl starch:

[0052] Step 1: Inject 170 parts of ethanol with a concentration of 90% into the reactor, and at the same time add 43 parts of NaOH, heat up to 35°C, and stir continuously for 18 minutes under constant temperature to make NaOH solution;

[0053] Step 2: Wet 125 parts of starch with soft water, put it into the reaction kettle, stir continuously for 60 minutes at a constant temperature of 34°C, and carry out alkalization;

[0054] Step 3: After alkalization, vacuumize and put 35 parts of chloroacetic acid with a concentration of 95% into the reactor, stir continuously for 20 minutes, then raise the temperature to 54±1°C and stir continuously for 40 minutes to carry out an etherification reaction, and then raise the temperature To 65±1°C, constant temperature and continuous stirring for 52min to carry out the secondary etherification reaction;

[0055] Step 4: ...

Embodiment 3

[0058] Carry out following steps successively to carry out the preparation of high-purity sodium carboxymethyl starch:

[0059] The first step: inject 175 parts of ethanol with a concentration of 90% into the reaction kettle, and at the same time put in 45 parts of NaOH, heat up to 30°C, and stir continuously for 25 minutes under constant temperature conditions to make NaOH solution;

[0060] Step 2: Wet 130 parts of starch with soft water, put it into the reaction kettle, stir continuously for 60 minutes at a constant temperature of 40°C, and carry out alkalization;

[0061] Step 3: After alkalization, vacuumize and put 40 parts of 95% chloroacetic acid into the reaction kettle, stir continuously for 20 minutes, then raise the temperature to 54±1°C and stir continuously for 40 minutes to carry out an etherification reaction, and then raise the temperature To 65±1°C, constant temperature and continuous stirring for 60min to carry out the secondary etherification reaction;

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Abstract

The invention discloses high-purity sodium carboxymethyl starch, a preparation method thereof and application thereof. Mainly during basification and etherification of starch in a reaction kettle, thestable reaction temperature, stirring time and stirring speed are strictly kept; and after an organic solvent is added into the starch, a semi-powder semi-grain product is completely stirred and fully dispersed in the organic solvent, and the solvent is removed to form a powder product. The purity of the prepared sodium carboxymethyl starch is as high as 90 to 99 percent, the substitution value is as high as 1.3 to 1.9, and the application fields of dye printing, spinning, food, papermaking, ceramics, petroleum and the like are enlarged.

Description

technical field [0001] The invention belongs to the fine chemical industry field of polymer materials, and in particular relates to the preparation and application of high-purity sodium carboxymethyl starch. Background technique [0002] With the development of my country's national economy, sodium carboxymethyl starch is used more and more widely, and the annual demand continues to increase. It can be used as emulsifier, thickener, dispersant, stabilizer, sizing agent, film-forming agent, water-retaining agent, etc. It is used in petroleum, textile, daily chemical, cigarette, papermaking, construction, food, medicine and other industrial fields. [0003] The traditional preparation process of sodium carboxymethyl starch is to put NaOH completely into the solvent at one time to make a sodium hydroxide solution, then put the starch into the NaOH solution to go through the alkalization process, and then add the etherifying agent-chloroacetic acid Perform carboxymethylation re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08B31/12
Inventor 张双剑滕圣泉
Owner SHANDONG YITENG NEW MATERIAL CO LTD
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