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Polyacrylamide composite flocculant and preparation method thereof

A polyacrylamide and composite flocculant technology, applied in chemical instruments and methods, flocculation/sedimentation water/sewage treatment, water/sewage treatment, etc. In order to achieve the effect of enhancing the interface effect, reducing the cost, and realizing the synergistic and efficient flocculation of sewage

Active Publication Date: 2015-06-24
四川省科学城天人环保有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, compared with organic polymer flocculants, it is inferior in degree of polymerization and flocculation effect, with large dosage and small flocs formed.

Method used

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  • Polyacrylamide composite flocculant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Disperse 20g of polyaluminum chloride in 1000mL of ethanol / water mixture with a volume ratio of 6 / 1, stir at 60°C for 1 hour, then add 2g of vinyltriethoxysilane, continue stirring for 3 hours, and filter the product with suction And after washing twice, vacuum-dry at 80°C;

[0024] Disperse 10g of surface-treated polyaluminum chloride in 200mL of water for 5 minutes of ultrasonic dispersion, the ultrasonic power is 200W; Solution, drop 100mL of polyaluminum chloride dispersion solution, raise the temperature to 50°C, pass N 2 , add 0.1g of initiator, stir evenly, react for 4h; cool the product to room temperature, wash with acetone precipitation, and vacuum dry at 40°C for 6h to obtain polyacrylamide in-situ composite flocculant.

Embodiment 2

[0026] Disperse 40g of polyaluminum silicate in 3000mL of ethanol / water mixture with a volume ratio of 6 / 1, stir at 60°C for 1 hour, then add 8g of vinyl-tris(β-methoxyethoxy)silane, Stirring was continued for 3 hours, and the product was vacuum-dried at 80°C after suction filtration and washing twice;

[0027] Disperse 20g of surface-treated polyaluminum silicate in 1000mL of water for 5 minutes of ultrasonic dispersion, the ultrasonic power is 200W; Mass concentration solution, dropwise add 200mL of polyaluminum silicate dispersion solution, heat up to 60°C, pass N 2 , add 0.5g of initiator, stir evenly, react for 5h; cool the product to room temperature, wash with acetone precipitation, and vacuum dry at 40°C for 6h to obtain polyacrylamide in-situ composite flocculant.

Embodiment 3

[0029] Disperse 60g of polyaluminum ferric chloride in 2000mL of ethanol / water mixture with a volume ratio of 6 / 1, stir at 60°C for 1 hour, then add 16g of γ-propylmethacrylate trimethoxysilane, and continue stirring for 3 hour, the product was vacuum-dried at 80° C. after being filtered and washed twice;

[0030] Disperse 40g of surface-treated polyaluminum ferric chloride in 2000mL of water for ultrasonic dispersion for 5 minutes, and the ultrasonic power is 200W. Dissolve 100g of acrylamide and 15g of acryloyloxyethyldimethyltetradecylammonium bromide in water to prepare a solution with a mass concentration of 35%, add dropwise 400mL of polyaluminum ferric chloride dispersion solution, heat up to 80°C, and pass N 2 , add 1.2g of initiator, stir evenly, react for 6h; cool the product to room temperature, wash with acetone precipitation, and vacuum dry at 40°C for 6h to obtain polyacrylamide in-situ composite flocculant.

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Abstract

The invention discloses a polyacrylamide composite flocculant and a preparation method thereof. The polyacrylamide composite flocculant is synthesized in situ by the following steps: carrying out inorganic high polymer flocculant surface treatment on acrylamide, an inorganic high polymer flocculant, an initiator, acryloyloxyethyldimethyl long-chain alkyl ammonium bromide and an olefinic-bond-containing silane coupling agent, preparing the polyacrylamide in-situ composite flocculant, and the like. The acrylamide molecule is introduced to the cationic flexible long branched chain structure, so that the physical entanglement network structure can better display the bridge mesh function. By compounding the inorganic high polymer flocculant with the cationic polyacrylamide, the reactive coupling agent is adopted to modify the inorganic high polymer flocculant surface, and the coupling agent molecule participates in the acrylamide polymerization reaction to graft the inorganic high polymer flocculant molecule onto the polyacrylamide molecule, thereby enhancing the interface action between the inorganic high polymer flocculant and polyacrylamide molecule and the adsorption, neutralization, sweep mesh actions on pollutants in sewage.

Description

technical field [0001] The invention belongs to the technical field of chemical synthesis, in particular to the technical field of polymer material synthesis, and particularly relates to a polyacrylamide composite flocculant and a preparation method thereof. Background technique [0002] Polyacrylamide (PAM) is one of the most commonly used organic polymer flocculants. It has been widely used in water treatment in recent years. Its dosage is small. The value and temperature have little influence, but its price is more expensive and the cost is higher. Inorganic polymer flocculant is a general term for a class of mononuclear and multinuclear coordination compounds with metal ions as the center and inorganic anions as counter ions. By strongly attracting colloidal particles, they promote Colloid coagulation and destabilization have the advantages of stronger adaptability than traditional medicines, non-toxicity, doubled performance and relatively cheap, etc., and have been ra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/56C02F1/52
CPCC02F1/5236C02F1/5245C02F1/56
Inventor 张进刘成军刘选云梁仁君罗贤杨仁凯曹萍刘珊珊
Owner 四川省科学城天人环保有限公司
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