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Amphoteric starch and preparing method thereof

A technology of amphoteric starch and starch, which is applied in the field of high-efficiency and low-cost amphoteric starch new varieties and its manufacture, can solve the problems of long process cycle, high manufacturing cost, complicated preparation, etc., and achieve the effect of excellent performance and low cost

Inactive Publication Date: 2016-04-13
SHANGHAI YINGMEI ELECTRICAL & MECHANICAL ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, due to the complex preparation and long process cycle of the current process, not only the manufacturing cost is high, but the product quality is unstable
At the same time, because the second step of the dry process generally does not wash the produced products, a large amount of inorganic salts and alkalis remain in the products, which will cause pollution in the use of downstream customers and increase the sewage treatment costs of downstream customers

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] After adding 1000 parts of tapioca starch to 1200 parts of water and stirring evenly, adding 100 parts of swelling inhibitor, adjusting the PH value to about 11.5 with 3% liquid caustic soda. The temperature is raised to 40-45 degrees, and 50 parts of 3-chloro-2 hydroxypropyl trimethyl ammonium chloride are added. After 7 hours of reaction, the temperature is lowered to normal room temperature, and the pH value is neutralized to about 8. Add 80 parts of succinic anhydride and keep the PH value unchanged until the end of the reaction. Then, neutralize with hydrochloric acid to a pH value of about 6,0. It is sent to post-processing for washing, dehydration, and drying through a 100-mesh finished product sieve to obtain a tapioca amphoteric starch product with cationic substitution degree DS=0.027 and anionic substitution degree DS=0.007.

Embodiment 2

[0032] After adding 2000 parts of corn starch to 2200 parts of water and mixing uniformly, add 160 parts of swelling inhibitor, and adjust the pH value to about 11.9. with 4.5% liquid caustic soda. Add 60 parts of 3-chloro-2 hydroxypropyl trimethyl ammonium chloride, raise the temperature to 50-55 degrees and react for 8 hours, then lower the temperature to normal room temperature and neutralize to about 8. Add 100 parts of succinic anhydride and keep the PH value unchanged until the end of the reaction. Then, neutralize with hydrochloric acid to a pH value of about 6,0. It is sent to post-processing for washing, dehydration, and drying to pass through a 100-mesh finished product sieve to obtain corn amphoteric starch. The product is white, with a PH value of 6.5, cation substitution degree DS=0.025, anion substitution degree DS=0.006.

Embodiment 3

[0034] After adding 800 parts of potato starch to 840 parts of water and stirring evenly, add 90 parts of swelling inhibitor. Adjust the pH to about 11.8 with 3.5% liquid caustic soda. Add 40 parts of 3-chloro-2 hydroxypropyl trimethyl ammonium chloride, raise the temperature to 40-48 degrees and react for 6 hours, then lower the temperature to normal room temperature and neutralize to about 8. Add 60 parts of succinic anhydride and keep the pH constant until the reaction is over. Then, neutralize with hydrochloric acid to a pH value of about 6,0. It is sent to the post-processing for washing, dehydration, and drying through a 100-mesh finished product sieve to obtain potato amphoteric starch. The product is white, PH value is 6.5, cation substitution degree DS=0.020, anion substitution degree DS=0.008.

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Abstract

The invention relates to amphoteric starch and a preparing method thereof. The amphoteric starch is characterized by being prepared from water serving as solvent, succinic anhydride serving as an anionized reagent, 3-chloro-2-hydroxypropyl-trimethylammonium chloride serving as a cationic etherifying agent, an acid-base pH modifier and a starch particle swelling inhibiting agent, and when different amounts of the cationic etherifying agent and the anion esterifying agent are added, a series of amphoteric starch products with different properties can be obtained. The novel anion chemical agent on a wet process production technology device is obtained, then the amphoteric starch with positive charges and negative charges at the same time is obtained, and according to the molecular structure characteristic of the products, groups with different polarity charges are connected to the different positions of the same molecular chain. The obtained amphoteric starch is excellent in performance, and low in cost, and the problems of the complex wet process and dry method two-step denaturation technology and the unstable quality in amphoteric starch industrial production are solved.

Description

[Technical Field] [0001] The invention relates to the technical field of amphoteric starch preparation, in particular to a new variety of amphoteric starch with high efficiency and low cost and a manufacturing method thereof. [Background technique] [0002] Amphoteric starch is a kind of modified starch, and its appearance is white powder. As the paper industry increasingly uses recycled waste paper as the main raw material source for papermaking, amphoteric starch plays an increasingly important role in the wet end chemical industry of papermaking. [0003] At present, the industrial production of amphoteric starch is a two-step denaturation method that uses a wet process and a dry process. That is, the wet production process is used to carry out cationic chemical modification of starch, and then the dry production process is used to introduce anionic groups to the cationic chemically modified starch, so as to realize the simultaneous introduction of positively charged cationic f...

Claims

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Application Information

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IPC IPC(8): C08B31/16C08B31/12C08B31/04
CPCC08B31/16C08B31/04C08B31/125
Inventor 倪大光
Owner SHANGHAI YINGMEI ELECTRICAL & MECHANICAL ENG CO LTD
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