Highly substituted carboxymethyl starch sodium preparation method

A technology of sodium carboxymethyl starch and high substitution is applied in the field of preparation of sodium carboxymethyl starch, which can solve the problems of uneven distribution, obtaining products with high substitution degree, slow dissolving speed, etc., and reduce production costs. , The effect of improving economic efficiency and saving oil consumption

Inactive Publication Date: 2014-02-05
新疆光大山河化工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The second is that the traditional process puts the alkali into the solvent at one time. As a result, the dissolution rate is very slow and the distribution is uneven, which seriously affects the alkalization effect of starch, and then affects the etherification effect, and finally cannot obtain high substitution degree. products, and the salt resistance and acid resistance of the product do not meet the requirements of application performance indicators
[0006] The third is that the traditional method for preparing starch carboxymethyl starch sodium is very prone to local reactions, resulting in incomplete etherification, low conversion rate, and increased side reactions, resulting in uneven substitution degrees of products, low substitution degrees, and low production efficiency.

Method used

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  • Highly substituted carboxymethyl starch sodium preparation method
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  • Highly substituted carboxymethyl starch sodium preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] a, inject 4 tons of composite solvents composed of 80% isopropanol, 15% ethanol, and 5% water into the reactor;

[0075] b. Raise the temperature of the reaction kettle to 22°C, vacuumize, open the inlet cover, put in 420 kg of caustic soda, heat up to 72°C, and keep stirring at constant temperature for 40 minutes;

[0076] c. Cool down to 20°C, vacuumize, open the access cover, put in 560 kg of starch, close the reactor, vacuumize, keep the temperature at 26°C, and stir continuously for 68 minutes;

[0077] d. Put 430 kg of chloroacetic acid with a concentration of 96.5% into the reaction kettle, keep stirring at a constant temperature of 28°C for 40 minutes, then raise the temperature to 60°C for the first etherification, and hold the etherification for 40 minutes at a constant temperature;

[0078] e. Spray 39 kg of lye into the reaction kettle through the annular porous spray pipe from the pressurized pump, carry out secondary etherification at a constant temperatur...

Embodiment 2

[0083] a, inject 8 tons of composite solvents composed of 71% isopropanol, 10% ethanol, and 3% water into the reactor;

[0084] b. Raise the temperature of the reaction kettle to 20°C, pump a vacuum, open the inlet cover, put in 400kg of caustic soda, raise the temperature to 70°C, and keep stirring at constant temperature for 20 minutes;

[0085] c. Then lower the temperature to 22°C, vacuumize, open the manhole cover, put in 540kg of starch, keep the temperature at 22°C, and stir continuously for 90 minutes;

[0086] d. Put 430kg of chloroacetic acid with a concentration of 96.5% into the reaction kettle, keep the temperature at 28°C, and stir continuously for 40 minutes, then raise the temperature to 55°C for the first etherification by heating up, and etherify at constant temperature for 40 minutes;

[0087] e. After 20 minutes, 35kg of lye is sprayed into the reaction kettle by the booster pump through the annular porous spray pipe, and the second etherification is carrie...

Embodiment 3

[0092] a, inject 7.8 tons of composite solvents composed of 87% isopropanol, 20% ethanol, and 9% water in the reactor;

[0093] b. Raise the temperature of the reaction kettle to 20°C, pump a vacuum, open the inlet cover, put in 430kg of caustic soda, raise the temperature to 70°C, and keep stirring at constant temperature for 20 minutes;

[0094] c. Then lower the temperature to 22°C, vacuumize, open the hole cover, put in 580kg of starch, keep the temperature at 28°C, and stir continuously for 90min;

[0095] d. Throwing 440kg of chloroacetic acid with a concentration of 96.5% into the reactor, constant temperature at 30°C, and continuous stirring for 40min;

[0096] e. Then raise the temperature to 60°C for the first etherification, and after etherification at a constant temperature for 40 minutes, spray 42kg of lye into the reaction kettle through a ring-shaped porous spray pipe from a pressure pump, and carry out the second etherification at a constant temperature of 65°C...

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Abstract

The present invention relates to a highly substituted carboxymethyl starch sodium preparation method, which comprises processes such as starch alkalization, starch etherification and deep purification, and is characterized in that the method comprehensively adopts a multi-step etherification reaction and a high temperature stirring technology, and the multi-step etherification reaction and the high temperature stirring technology comprise steps of sequentially adding a reaction alkali and a starch raw material to a mixing multiple solvent in a step-by-step manner to carry out an infiltration alkalization reaction, spraying the remaining alkali solution into the reaction system under high temperature stirring through pressurization in a mist form, adding an etherification agent, and carrying out an etherification process four times. Compared with the method in the prior art, the method of the present invention has characteristics of complete alkalization and etherification, high conversion rate and high production efficiency.

Description

technical field [0001] The invention relates to a preparation method of high-substituted carboxymethyl starch sodium. Background technique [0002] At present, with the development of my country's social economy and the improvement of people's living standards, sodium carboxymethyl starch has become more and more widely used, and it has a broad application space in the field of food industry, including: in the processing of jam, syrup, sherbet It can be used as a viscous agent and bulking agent in hot sauce; it can make the structure uniform, fine and beautiful in appearance when it is used in the production of snack foods; it can prevent the growth of ice crystals in the production of ice cream; it can be used as an additive in the production of mayonnaise or condiments Thickening agent, used as a stabilizer in jelly, cake and bakery food; in addition, it can also form a film for surface treatment of vegetables, fruits, eggs and tea, so that it can maintain the original color...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B31/12
Inventor 李振坤
Owner 新疆光大山河化工科技有限公司
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