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Composite cationic polyacrylamide flocculant and preparation method thereof

A polyacrylamide and cationic technology, applied in chemical instruments and methods, flocculation/sedimentation water/sewage treatment, water/sludge/sewage treatment, etc., to achieve the effect of enhancing flocculation and sedimentation ability

Pending Publication Date: 2020-08-25
中科乐美科技集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the price of cationic polyacrylamide with slightly better quality is significantly higher than that of polyaluminum chloride. Therefore, the application of cationic polyacrylamide is limited. Whether cationic polyacrylamide can be combined with polyaluminum chloride Combined to obtain a moderately priced flocculant, this application has carried out related research and development

Method used

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  • Composite cationic polyacrylamide flocculant and preparation method thereof
  • Composite cationic polyacrylamide flocculant and preparation method thereof

Examples

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Embodiment 1

[0023] A composite cationic polyacrylamide flocculant. The composition of the composite cationic polyacrylamide flocculant includes the following raw materials in parts by weight: 65 parts of starch polyacrylamide, 35 parts of activated silicic acid, and 1.5 parts of liquid polyaluminum chloride , 0.7 parts of ammonium thiosulfate, 9 parts of zinc sulfate, 9 parts of magnesium sulfate, 3 parts of 0.1mol / l borax solution, and 95 parts of deionized water.

[0024] A preparation method of a composite cationic polyacrylamide flocculant, comprising the following steps:

[0025] (1) Weigh 1.5 parts of liquid polyaluminum chloride and add it to the reaction kettle, stir the liquid polyaluminium chloride at a speed of 750r / min, weigh and add 17 parts of activated silicic acid at the same time, to obtain Mixture A, standby;

[0026] (2) Weigh the remaining activated silicic acid in proportion, adjust the pH to 1.9 with dilute sulfuric acid, stir at room temperature at a speed of 750r / ...

Embodiment 2

[0029] A composite cationic polyacrylamide flocculant, the composition of the composite cationic polyacrylamide flocculant includes the following raw materials in parts by weight: 50 parts of starch polyacrylamide, 20 parts of activated silicic acid, and 0.9 parts of liquid polyaluminum chloride , 0.1 parts of sodium hypophosphite, 7 parts of zinc sulfate, 7 parts of magnesium sulfate, 1 part of 0.1mol / l borax solution, and 90 parts of deionized water.

[0030] A preparation method of a composite cationic polyacrylamide flocculant, comprising the following steps:

[0031] (1) Take liquid polyaluminum chloride in proportion and add it to the reaction kettle, stir the liquid polyaluminium chloride at a speed of 700r / min, weigh and add 11.25 parts of activated silicic acid at the same time, to obtain Mixture A, standby;

[0032] (2) Weigh the remaining activated silicic acid in proportion, adjust the pH to 1.8 with dilute sulfuric acid, stir for 1 hour at room temperature at a s...

Embodiment 3

[0035] A composite cationic polyacrylamide flocculant, the composition of the composite cationic polyacrylamide flocculant includes the following raw materials in parts by weight: 80 parts of starch polyacrylamide, 50 parts of activated silicic acid, and 2 parts of liquid polyaluminum chloride , 0.5 parts of sodium hydrosulfide, 12 parts of zinc sulfate, 12 parts of magnesium sulfate, 5 parts of 0.1mol / l borax solution, and 100 parts of deionized water.

[0036] A preparation method of a composite cationic polyacrylamide flocculant, comprising the following steps:

[0037] (1) Take liquid polyaluminum chloride in proportion and add it to the reaction kettle, stir the liquid polyaluminium chloride at a speed of 800r / min, weigh and add 20 parts of activated silicic acid at the same time, to obtain Mixture A, standby;

[0038] (2) Weigh the remaining activated silicic acid in proportion, adjust the pH to 2 with dilute sulfuric acid, stir for 1.5 hours at room temperature at a sp...

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Abstract

The invention provides a composite cationic polyacrylamide flocculant and a preparation method thereof. The composite cationic polyacrylamide flocculant comprises the following raw materials in partsby weight: 50-80 parts of starch polyacrylamide, 20-50 parts of activated silicic acid, 0.9-2 parts of liquid polyaluminum chloride, 0.1-0.5 part of a stabilizer, 7-12 parts of zinc sulfate, 7-12 parts of magnesium sulfate and 1-5 parts of a borax solution. In the present invention, the activated silicic acid can increase the polymerization degree of the polyaluminium chloride and adjust the internal charge structure of the polyaluminium chloride; the activated silicic acid interacts with aluminum ions in the system to generate larger polymer (polyaluminum silicate chloride), and the polyaluminum silicate chloride simultaneously has three functions of electrostatic neutralization, adsorption bridging and net capture in the wastewater treatment process, so that the flocculation settling capacity of the composite flocculant is enhanced, and the obtained flocculant is relatively moderate in price and relatively high in cost performance.

Description

technical field [0001] The invention relates to the technical field of flocculants, in particular to a composite cationic polyacrylamide flocculant and a preparation method thereof. Background technique [0002] Flocculant is currently the most widely used agent in sewage treatment. The flocculation process is an indispensable key link in the sewage treatment process. According to its chemical composition, it can be divided into: inorganic salt flocculant, organic polymer flocculant and microbial flocculation agent. The combination of flocculant and wastewater treatment equipment makes wastewater treatment more effective and effectively solves the problem of wastewater treatment. [0003] Polyaluminum chloride is an inorganic polymer coagulant, which has a high degree of electrical neutralization and bridging effect on colloids and particles in water, and can strongly remove micro-toxic substances and heavy metal ions, and has stable properties. Therefore, in the prior art,...

Claims

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Application Information

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IPC IPC(8): C02F1/56C02F1/52
CPCC02F1/56C02F1/5236
Inventor 梁俊杰曹宇翔高丽耿南桥唐公明
Owner 中科乐美科技集团有限公司
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