Water-soluble sulfonated/quaternized chitosan and preparation method thereof

A technology of quaternized chitosan and sulfonated chitosan, applied in chemical instruments and methods, descaling and water softening, water/sludge/sewage treatment, etc., can solve the problems of increased energy consumption, complicated process, Problems such as single performance

Inactive Publication Date: 2013-04-03
HEBEI UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to its relatively simple performance, it must be used together with other agents to achiev

Method used

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  • Water-soluble sulfonated/quaternized chitosan and preparation method thereof
  • Water-soluble sulfonated/quaternized chitosan and preparation method thereof
  • Water-soluble sulfonated/quaternized chitosan and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0041] Example 1:

[0042] Weigh 0.40 g of chitosan with a degree of polymerization of n of 30 in the reactor, use 20 mL of 1% (w / w) acetic acid solution to stir and dissolve; add 0.03 g of ammonium persulfate under the protection of nitrogen, and continue stirring until the ammonium persulfate is completely dissolved ,; Weigh AMPS2.05g dissolved in 20mL water, transfer the solution into a constant-pressure dropping funnel and assemble it on a reactor that has been placed in a constant temperature water bath at 60℃, add AMPS solution dropwise to the reactor under the protection of nitrogen, After all the drops are finished, continue to stir for 4h; the reactants are cooled to room temperature, the solution is adjusted to neutral with 5% sodium hydroxide, precipitated with a mixed solvent (acetone:ethanol=1:1, v / v), and dried under vacuum to prepare Get sulfonated chitosan. The scale inhibition evaluation showed that the scale inhibition rate of sulfonated chitosan was 89% when n...

Example Embodiment

[0047] Example 2:

[0048] The steps are the same as in Example 1, except that 0.40g of chitosan with a degree of polymerization n of 60, ammonium persulfate of 0.02g, AMPS dosage of 1.02g, water bath temperature of 40°C, and reaction time of 3h are different. Get sulfonated chitosan. The scale inhibition evaluation showed that the scale inhibition rate of sulfonated chitosan was 73% when n was 60.

Example Embodiment

[0049] Example 3:

[0050] The steps are the same as in Example 2, except that 0.40 g of chitosan with a degree of polymerization n of 180 is weighed, and the reaction conditions are controlled to obtain sulfonated chitosan. The scale inhibition evaluation showed that the scale inhibition rate of sulfonated chitosan was 53% when n was 180.

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Abstract

The invention relates to a water-soluble sulfonated/quaternized chitosan of which the structural formula is shown in the specification. The water-soluble sulfonated/quaternized chitosan provided by the invention is a multifunctional water treatment agent which simultaneously contains an anionic sulfonic acid group and a cationic quaternary ammonium group. Compared with the chitosan raw material, the functions of the water-soluble sulfonated/quaternized chitosan are increased, the water-soluble sulfonated/quaternized chitosan can be used in the treatment of industrial water and waste water to simultaneously solve the problems of scaling and microbe multiplication, and the anti-scaling and sterilization effect is improved by about 50-60%. In the structural formula, n is average degree of polymerization, and n is larger than or equal to and is smaller than or equal to 200.

Description

technical field [0001] The present invention relates to the preparation of sulfonated-quaternized chitosan, specifically chitosan and sulfonate through grafting reaction to synthesize sulfonated chitosan, and then react with quaternary ammonium salt to generate a water-soluble sulfonated chitosan - Quaternized chitosan. technical background [0002] Water is the resource that human production and life rely on for survival. In industrial water and wastewater treatment, especially in industrial circulating cooling water systems, oil fields, petrochemical and other industries, flocculants, corrosion inhibitors, scale inhibitors, and bactericides are often used. Agents and other water treatment chemicals. In recent years, including developed countries, phosphorus-free, easy biodegradation and environmental friendliness are common trends in the development of water treatment chemicals. [0003] Chitosan is the product obtained by deacetylation of chitin. It is a natural cationi...

Claims

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Application Information

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IPC IPC(8): C08B37/08C02F5/12C02F1/56C02F1/50
Inventor 张惠欣朱玉超王枫孙冬雪杨婷茹
Owner HEBEI UNIV OF TECH
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