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Process for producing modified starch by using microwave far infrared method

A microwave far-infrared and modified starch technology is applied in the technical field of producing modified starch by using the microwave far-infrared method, and can solve the problems of uneven heating of native starch and chemical reagents, difficult product quality assurance, and no large-scale industrial production. To achieve the effect of easy control of product quality, improvement of water resources environment, and high conversion rate

Inactive Publication Date: 2010-07-14
四川省蓬溪县弘桥实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But it also has obvious defects, that is, the yield of the product is low, the production water consumption is large, the sewage is difficult to treat, the energy consumption is large, the conversion rate of chemical auxiliary materials is low, and the cost is high
The current domestic production of modified starch using heat-conducting oil pipe heating and hot air heating dry method overcomes some of the shortcomings of the wet production process, but since the heating method is still mainly convection and conduction heating, the thermal efficiency is still not high. Uneven heating with chemical reagents leads to poor reaction balance and difficult product quality assurance
Therefore, the heating process currently used in China still has the problems of high consumption and low output.
At present, the production of modified starch by microwave in China only stays in the laboratory, and has not really formed large-scale industrial production.

Method used

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  • Process for producing modified starch by using microwave far infrared method
  • Process for producing modified starch by using microwave far infrared method
  • Process for producing modified starch by using microwave far infrared method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Add 1000 parts of raw starch into the mixer, start the stirring motor, spray 25 parts of 10% diluted hydrochloric acid and 20 parts of 40% hydrogen peroxide, stir for 10-15 minutes at room temperature, and then fully mix with a high-speed mixer Send it to the material inlet of the microwave far-infrared integrated equipment, adjust the thickness of the material layer to 3-6cm, turn on the microwave far-infrared integrated equipment, adjust the material temperature to 50-150°C, keep it for 10-30min, and measure the moisture and viscosity to reach After the specified value, put the material into the cooling compound machine and when the temperature drops below 40°C, spray 20 parts of 10% potassium hydroxide solution (including 5 parts of methanol) and mix well, then add 1 part of micro The crystal cellulose is fully mixed for 10-20 minutes, sieved and packaged to obtain the product produced by the present invention.

Embodiment 2

[0032] Add 1000 parts of raw starch into the mixer, start the stirring motor, spray 18 parts of 15% diluted hydrochloric acid, 10 parts of 12% ammonium persulfate, and stir for 10 to 15 minutes under normal temperature conditions. The follow-up procedure is the same as in Example 1. Then spray 25 parts of 10% sodium hydroxide solution (containing 5 parts of methanol) and mix evenly, then add 0.8 parts of silicon dioxide, fully mix for 10-20 minutes, sieve and pack to obtain the product produced by the present invention.

Embodiment 3

[0034] Add 1000 parts of raw starch into the mixer, start stirring, then spray 15 parts of 20% diluted sulfuric acid, 10 parts of 10% hydrogen peroxide, stir at room temperature for 10-15min, follow-up procedures are the same as in Example 1, and then spray Add 15 parts of 25% sodium silicate solution, mix evenly, then add 0.8 part of silicon dioxide, mix thoroughly for 10-20 minutes, and obtain the product produced by the present invention after being sieved and packaged.

[0035] The modified starch obtained in the above examples is mainly used in the addition of gypsum boards, and its main properties are shown in the table (taking the product standard used by a well-known domestic gypsum board manufacturer as an example)

[0036] Table 1:

[0037]

[0038] The results show that the main properties of the gypsum board starch of the present invention meet or exceed the standards and performance requirements specified by the gypsum board application enterprises, and the eff...

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Abstract

The invention discloses a process for producing modified starch by using a microwave far infrared method, comprising the following steps of: uniformly mixing starch with an oxidant, an acid / base catalyst, an etherifying agent and a esterifying agent, placing the mixture into microwave far infrared integration equipment for heating reaction, carrying out neutralization reaction and physical synergism, and finally sieving, weighting and packing. The invention has the advantages of high heating reaction speed, thorough reaction, good film-forming property, high bonding, enhancing and retaining ratio, low cost, wide application range, low energy consumption, no pollution to environment and scale production. The modified starch produced by the invention can be widely used as a binder, an intensifier, a stabilizer, a densifier and the like to be used in the industries of paper making, spinning, food, medical treatment, plastic, well drilling, building materials, daily chemicals and the like.

Description

technical field [0001] The invention relates to a production process of modified starch, more specifically a process for producing modified starch by using microwave far infrared method. Background technique [0002] Modified starch is the original starch extracted from grain and potato, such as corn starch, tapioca starch, potato starch, sweet potato starch, etc. Chemical reaction changes its performance and transforms it into products with different uses and specifications. As a binder, reinforcing agent, stabilizer, thickener, size and auxiliary agent, modified starch is widely used in industries such as papermaking, textiles, food, medicine, plastics, drilling, building materials, and daily chemicals. As a functional raw material widely used in various industries, it plays a very important role in reducing production costs, improving product quality and grade, and developing new products. The production process of modified starch includes wet method, solvent method, dr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L3/04C08B31/00C08K3/28C08K3/34C08K3/32C08K3/36C08K5/09C08K5/21
Inventor 何世桥钟耕李大勇
Owner 四川省蓬溪县弘桥实业有限公司
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