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Synthesis method of P(AM-DMDAAC)

A technology of AM-DMDAAC and synthesis method, applied in the field of P synthesis, can solve problems such as safety threats to workshop workers, difficulties in industrial production and operation, and reduced solubility of flocculants, and achieves easy popularization and use, good synthesis effect, and product conversion. The effect of increasing rate and intrinsic viscosity

Inactive Publication Date: 2017-05-31
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the equipment will increase the production cost and be difficult in industrial production and operation
On the other hand, extreme temperatures lead to cross-linking of the polymer, which further leads to a decrease in the solubility of the flocculant
In addition, high-voltage ultraviolet light has higher penetration, so it is considered to pose a major safety threat to workshop workers, and high-voltage ultraviolet light consumes more energy, so it is not recommended for industrial production

Method used

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  • Synthesis method of P(AM-DMDAAC)
  • Synthesis method of P(AM-DMDAAC)
  • Synthesis method of P(AM-DMDAAC)

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] P(AM -DMDAAC), poly(acrylamide-dimethyldiallylammonium chloride). The jars used for the reaction were made of quartz and glass to carry out parallel experiments to consider the influence of quartz and glass on the conversion rate and intrinsic viscosity. The specific steps are:

[0039] 1) Add AM monomer and distilled water into the jar, then add PAAS, DMDAAC monomer, EDTA and urea in sequence (add 60mg urea to 20ml distilled water to obtain a urea solution with a concentration of 3‰), then stir until completely dissolved , forming a mixed solution.

[0040] 2) Use hydrochloric acid and sodium hydroxide to adjust the pH value of the mixed solution to 4, and then pass nitrogen to drive oxygen; then add an azo initiator in a nitrogen atmosphere, and continue to pass nitrogen for 10 minutes, and then seal the jar to form a seal reaction system.

[0041] 3) Put the sealed reaction system under ultraviolet light with a wavelength of 253.7nm and a power of 24W to irradiate...

Embodiment 2

[0049] P(AM -DMDAAC), poly(acrylamide-dimethyldiallylammonium chloride). Its reaction condition is identical with embodiment one, and difference only is that two groups of experimental conditions are respectively one group uses high pressure ultraviolet light (wavelength 365nm, power 500W), glass jar, and another group uses low pressure ultraviolet light (wavelength 257.3nm , power 24W) and quartz jars, and in this way, consider the influence of high and low pressure ultraviolet light on the system temperature and the conversion rate of high and low pressure ultraviolet light illumination time.

[0050] Depend on Figure 7 It can be seen that with the increase of the reaction time, the temperature of the reaction system increases significantly, and the temperature change of the system caused by high-pressure ultraviolet light is more severe. When the reaction time reaches 60 minutes, the temperature of the system under the two triggers tends to be stable, indicating that the...

Embodiment 3

[0053] P(AM -DMDAAC), poly(acrylamide-dimethyldiallylammonium chloride). Its reaction condition is identical with embodiment two, and difference only is that two groups of experimental conditions are respectively a group of high pressure ultraviolet light (wavelength 365nm, power 500W), glass jar, and another group uses low pressure ultraviolet light (wavelength 257.3nm , power 24W) and quartz jars, and in this way, consider the influence of high and low pressure ultraviolet light irradiation time on intrinsic viscosity and conversion rate.

[0054] Depend on Figure 9 It can be seen that the conversion rate using high-pressure ultraviolet light and low-pressure ultraviolet light increases with time, and when the reaction time reaches 60 minutes, the conversion rate has reached 98%, 97.6%. Afterwards, it hardly changes with the increase of reaction time. The conversion rates of using both high-pressure UV light and low-pressure UV light at the same time are approximately th...

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Abstract

The invention discloses a synthesis method of P(AM-DMDAAC). The synthesis method comprises the following step of initiating polymerizing reaction on an AM (acrylamide) monomer, a DMDAAC (dimethyl diallyl ammonium chloride) monomer and PAAS (sodium polyacrylate) as a template under the action of low-voltage ultraviolet rays, so as to synthesize the P(AM-DMDAAC). The synthesis method has the advantages that the synthesis effect is good, the safety is high, and the like.

Description

technical field [0001] The invention belongs to the technical field of organic synthesis, and in particular relates to a synthesis method of P(AM-DMDAAC). Background technique [0002] Cationic polyacrylamide (CPAM) is a widely used sludge conditioner. With the continuous deterioration of water quality and the continuous increase of drainage, the amount of sewage treatment and the depth of treatment increase, and the amount of sludge becomes larger. Therefore, for cationic polyacrylamide (CPAM), both its demand and type are essential. However, most of the traditional cationic polyacrylamide (CPAM) is not concentrated in the distribution of cationic units, resulting in a small positive charge density, which limits its application in sludge dewatering. [0003] Aiming at the defects of cationic polyacrylamide (CPAM), people have developed P(AM-DMDAAC), which is poly(acrylamide-dimethyl diallyl ammonium chloride), and the current synthesis method is usually based on acrylamid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/56C08F226/02C08F2/48C08F2/01
CPCC08F2/01C08F2/48C08F220/56C08F226/02
Inventor 李伟郑怀礼赵传靓丁俊文郝偲言
Owner CHONGQING UNIV
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