Preparation method and application of polytitanium aluminum chloride-cationic polyacrylamide composite flocculant

A technology of polyacrylamide and polytitanium aluminum chloride, which is applied in the fields of chemical instruments and methods, flocculation/sedimentation water/sewage treatment, water/sludge/sewage treatment, etc. Large amount, slow settling speed and other problems, to achieve good coagulation effect, strong adsorption and bridging ability, and good electrical neutralization effect

Active Publication Date: 2020-12-22
舒朋士环境科技(常州)股份有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The present invention aims at the existing single inorganic macromolecule flocculant polyaluminum chloride (PAC) as the water treatment agent, the dosage of the agent is large, the treatment effect is not obvious, the alum flowers are small and dense, the settling speed is slow, and the residual aluminum is harmful to the water treatment. There are problems such as great threats to human health, polyaluminum chlo

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  • Preparation method and application of polytitanium aluminum chloride-cationic polyacrylamide composite flocculant
  • Preparation method and application of polytitanium aluminum chloride-cationic polyacrylamide composite flocculant

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[0026] A preparation method of polytitanium aluminum chloride-cationic polyacrylamide composite flocculant, it comprises the following steps:

[0027] (1) Weigh a certain mass of polyaluminum chloride and add water to fully stir and dissolve to obtain a yellow polyaluminum chloride solution. Place the fully dissolved polyaluminum chloride solution at -20-5°C for 1- 60min;

[0028] (2) TiCl 4 Add in the polyaluminium chloride solution gained in step (1), fully stir according to OH - / Al 3+ The molar ratio of the solution is 0.05-0.35, and the sodium hydroxide solution with a concentration of 1mol / L is added dropwise. After the dropwise addition, the constant temperature water bath is continuously stirred for 2 hours to obtain a polytitanium aluminum chloride solution;

[0029](3) The cationic polyacrylamide is fully stirred and dissolved with water to obtain a colorless transparent viscous solution, and the fully dissolved cationic polyacrylamide solution is stored at a temp...

Embodiment 1

[0036] (1) Weigh 15.0000g of polyaluminum chloride (PAC) solid powder and dissolve it in about 30mL of pure water, stir well to dissolve it; place the polyaluminum chloride (PAC) solution in freezing conditions for several hours (close to freezing , about 10min).

[0037] (2) Pipette 2.8131mL of TiCl with a pipette gun 4 Solution (density 1.726g / cm 3 , TiCl 4 The relative molecular mass is 189.679) into the polyaluminum chloride (PAC) solution obtained in (1), and fully stirred to obtain a mixed solution.

[0038] (3) According to the molar ratio of OH / Al being 0.15, add a sodium hydroxide (NaOH) solution with a concentration of 1mol / L to the mixed solution in (2) dropwise. After the dropwise addition, keep stirring in a constant temperature water bath at 50°C for 2h , to obtain polytitanium aluminum chloride (PTA) solution.

[0039] (4) Weigh 5.0000 g of cationic polyacrylamide (CPAM) and dissolve it in pure water, and set the volume in a 500 mL volumetric flask to obtain...

Embodiment 2

[0041] A preparation method of polytitanium aluminum chloride-cationic polyacrylamide composite flocculant, it comprises the following steps:

[0042] (1) Weigh a certain mass of polyaluminum chloride and add water to fully stir and dissolve to obtain a yellow polyaluminum chloride solution, place the fully dissolved polyaluminum chloride solution at -10°C for 10 minutes;

[0043] (2) TiCl 4 Add in the polyaluminium chloride solution gained in step (1), fully stir according to OH - / Al 3+ The molar ratio of the solution is 0.15, and the sodium hydroxide solution with a concentration of 1mol / L is added dropwise. After the dropwise addition, the constant temperature water bath is continuously stirred for 2 hours to obtain a polytitanium aluminum chloride solution;

[0044] (3) The cationic polyacrylamide is fully stirred and dissolved with water to obtain a colorless transparent viscous solution, and the fully dissolved cationic polyacrylamide solution is stored at a temperatu...

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Abstract

The invention relates to a preparation method and application of a titanium aluminum polychloride-cationic polyacrylamide composite flocculating agent and belongs to the technical field of water treatment. The preparation method comprises the following steps: preparing a titanium aluminum polychloride solution; adding TiCl4 into the titanium aluminum polychloride solution obtained in step (1); sufficiently stirring and dropwise adding a sodium hydroxide solution; adding water into cationic polyacrylamide and sufficiently stirring and dissolving to obtain a colorless and transparent sticky solution; preserving a cationic polyacrylamide solution which is sufficiently dissolved at a temperature of -2 DEG C to 45 DEG C; adding the cationic polyacrylamide solution into the titanium aluminum polychloride solution according to the mass ratio of cationic polyacrylamide/Al of (0.1-0.6):1; and continually stirring to obtain the titanium aluminum polychloride-cationic polyacrylamide composite flocculating agent. The preparation method and application of the titanium aluminum polychloride-cationic polyacrylamide composite flocculating agent have the advantages of simple process and low cost; the obtained flocculating agent has stronger adsorption and electrical neutralization, and adsorption bridging and net capturing capabilities; and the flocculating agent has a good coagulation effect, a wide application range and a small addition amount.

Description

technical field [0001] The invention relates to a preparation method and application of a polytitanium aluminum chloride-cationic polyacrylamide composite flocculant and belongs to the technical field of water treatment. Background technique [0002] With the rapid development of industry and agriculture and the rapid increase of population, the water resources that human beings depend on for survival are becoming increasingly scarce, and the water resource crisis is becoming more and more serious. At present, water pollution and water shortage are becoming more and more important factors restricting economic development. In order to conserve water resources, improve water utilization, and reduce and eliminate the harm caused by water pollution to humans and the environment, water treatment must be strengthened. Coagulation technology is the most commonly used treatment technology unit in water pollution control, water purification treatment, sewage (waste) water advanced t...

Claims

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Application Information

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IPC IPC(8): C02F1/52C02F1/56C02F1/28
CPCC02F1/285C02F1/5245C02F1/56
Inventor 张鹏王雨露张艳君廖为雄朱国成丁文杰
Owner 舒朋士环境科技(常州)股份有限公司
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