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Preparation method of cationic polyacrylamide sludge dehydrant

A technology of sludge dehydrating agent and polyacrylamide, which is applied in the direction of dehydration/drying/concentrated sludge treatment, etc., can solve the problems of CPAM introducing oligomer templates, etc., achieve low cost, high monomer conversion rate, and less initiator dose Effect

Active Publication Date: 2018-01-19
洛阳市誉龙净水材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] For the above-mentioned deficiencies existing in the prior art, the purpose of the present invention is to provide a kind of preparation method of cationic polyacrylamide sludge dewatering agent, solve the problem that the CPAM of existing template method will introduce oligomer template

Method used

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  • Preparation method of cationic polyacrylamide sludge dehydrant
  • Preparation method of cationic polyacrylamide sludge dehydrant
  • Preparation method of cationic polyacrylamide sludge dehydrant

Examples

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Effect test

Embodiment 1

[0035] The preparation method of the present embodiment cationic polyacrylamide sludge dewatering agent comprises the following steps:

[0036] (1) Add 5g AM monomer, 0.072g complexing agent EDTA-2Na (the mass fraction of EDTA-2Na is 0.4%) and 0.36g solubilizer urea (the mass fraction of urea is 2.0%) into the reactor, and then pass through the pipette Draw 2.21g of surface-active monomer DMBAC (the sum of the mass fraction of AM and DMBAC monomer is 40%, n(DMBAC):n(AM)=1:9) and 10.38g of distilled water are added to the reactor, and use a glass rod to fully Stir until completely dissolved to form a mixed solution.

[0037] (2) Use 0.1mol / L hydrochloric acid or sodium hydroxide to adjust the pH value of the mixed solution to 4, and fill it with N with a purity > 99.9%. 2, 2.2 mg of initiator V was added after 6 min 50 (V 50 0.03% of the total mass of AM and DMBAC); continue to pass N 2 After 10 min, the reactor was quickly sealed with the reactor bottle cap to form a seale...

Embodiment 2

[0040] The preparation method of this implementation cationic polyacrylamide sludge dewatering agent, the steps are as follows:

[0041] (1) Add 5g AM monomer, 0.06g complexing agent EDTA-2Na (the mass fraction of EDTA-2Na is 0.3%) and 0.3g solubilizer urea (the mass fraction of urea is 1.5%) into the reactor, and then pass through the pipette Draw 1.99g of surface active monomer DMBAC (the sum of the mass fraction of AM and DMBAC monomer is 35%, n(DMBAC):n(AM)=1:10) and 12.62g of distilled water are added to the reactor, and the glass rod is used to fully Stir until completely dissolved to form a mixed solution.

[0042] (2) Use 0.1mol / L hydrochloric acid or sodium hydroxide to adjust the pH of the mixed solution to 3, and fill it with N with a purity > 99.9%. 2 , after 6 min, add 1.4mg initiator V 50 (V 50 0.02% of the total mass of AM and DMBAC); continue to pass N 2 After 10 min, the reactor was quickly sealed with the reactor bottle cap to form a sealed reaction syste...

Embodiment 3

[0045] The preparation method of this implementation cationic polyacrylamide sludge dewatering agent, the steps are as follows:

[0046] (1) Add 5g AM monomer, 0.11g complexing agent EDTA-2Na (0.5% EDTA-2Na mass fraction) and 0.55g solubilizer urea (2.5% urea mass fraction) into the reactor, and then pass through the pipette Draw 4.96g of surface-active monomer DMBAC (the sum of the mass fraction of AM and DMBAC monomer is 45%, n(DMBAC):n(AM)=1:4) and 11.5g of distilled water are added to the reactor, and the glass rod is used to fully Stir until completely dissolved to form a mixed solution.

[0047] (2) Use 0.1mol / L hydrochloric acid or sodium hydroxide to adjust the pH value of the mixed solution to 5. After it dissolves, fill it with N with a purity > 99.9%. 2 , after 6 min, add 4mg initiator V 50 (V 50 Concentration is 0.04%); continue to pass N 2 After 10 min, the reactor was quickly sealed with the reactor cap covered with plastic wrap to form a sealed reaction syst...

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Abstract

The invention discloses a preparation method of a cationic polyacrylamide sludge dehydrant. The preparation method comprises the steps of dissolving acrylamide, a complexing agent EDTA-2Na, solubilizer urine and methylacryloyl yloxyethyl dimethyl benzyl ammonium chloride into water to be prepared into a mixed solution; adjusting a pH of the mixed solution to 3 to 5, adding an initiator V50 and then performing ultrasonic reaction on the mixed solution in a nitrogen atmosphere; after the ultrasonic reaction finishes, standing and curing the mixed solution, then taking a polymer obtained from reaction out, purifying and grinding into powder to obtain the cationic polyacrylamide sludge dehydrant. According to the preparation method disclosed by the invention, soap-free emulsion polymerizationis utilized, and a surface active monomer with amphipathy is utilized to replace an original cationic monomer and a template; since the surface active monomer not only has a self-assembling function,but also can polymerize double bonds, the surface active monomer can generate copolymerization directly with the acrylamide monomer; thus, the problem that an oligomer template is introduced by CPAM for preparing a block structure in a traditional method is avoided.

Description

technical field [0001] The invention belongs to the technical field of water treatment, in particular to a preparation method of a cationic polyacrylamide sludge dewatering agent. Background technique [0002] With the acceleration of industrialization and urbanization in my country, the discharge of industrial wastewater and domestic sewage is increasing. At the same time, the sludge output of sewage treatment plants is also increasing. The disposal of sludge is the core link of the entire sewage treatment process. If the sludge that is not properly treated enters the natural environment, it will not only pollute the environment, but also cause a waste of energy and resources. Reduction, stabilization, harmlessness and recycling are the four basic principles of sludge treatment, among which reduction is the focus of sludge disposal and the key to subsequent sludge treatment. There are two ways to reduce the amount, one is to reduce the water content of the sludge, and the ...

Claims

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Application Information

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IPC IPC(8): C02F11/14
Inventor 郑怀礼赵传靓曲雯琪闫正乾安延严刘鸿霞李翊森
Owner 洛阳市誉龙净水材料有限公司
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