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Preparation method of polysilicate aluminum-titanium and chitosan composite flocculant

A composite flocculant, polyaluminum silicate technology, applied in chemical instruments and methods, flocculation/sedimentation water/sewage treatment, water/sewage treatment, etc., can solve the problems of residual aluminum toxicity, water pollution, etc., and achieve easy adsorption Bridging, easy hydrolysis complexation, simple preparation effect

Inactive Publication Date: 2017-05-10
JILIN INST OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem of water pollution needs to be solved urgently. At present, the most widely used aluminum salt flocculants have the problem of residual aluminum toxicity. Therefore, other metal salt flocculants have gradually become a research hotspot, hoping to replace aluminum salts.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Prepare a 0.1 mol / L sodium silicate solution, slowly add 20% sulfuric acid solution dropwise to adjust the pH to 2, heat and stir in a water bath for 2 hours, and let it stand for 8 hours to prepare a polysilicate solution for use; prepare 0.4 mol / L of aluminum sulfate and titanium sulfate aqueous solution for subsequent use; prepare a chitosan acetate solution with a mass fraction of about 1%; take 6 ml of aluminum sulfate solution and 3 ml of titanium sulfate solution and add them to 50 ml of polyaluminum silicate solution, and stir evenly to obtain poly Aluminum titanium silicate, and then add 7.2 ml of chitosan acetic acid solution to polyaluminum titanium silicate, stir in a water bath at 25 °C for 2 h, leave it at room temperature for 6 h, dry and grind at 40 °C to obtain the product.

Embodiment 2

[0012] Prepare a 0.2 mol / L sodium silicate solution, slowly add 20% sulfuric acid solution dropwise to adjust the pH to 1.5, heat and stir in a water bath for 2 h, and let it stand for 12 h to prepare a polysilicate solution for use; prepare 0.4 mol / L of aluminum sulfate and titanium sulfate aqueous solution for later use; prepare a chitosan acetate solution with a mass fraction of about 1%; take 3.5 ml of aluminum sulfate solution and 7 ml of titanium sulfate solution and add it to 50 ml of polyaluminum silicate solution, and stir evenly to obtain Aluminum titanium polysilicate, then add 14 ml of chitosan acetic acid solution to the polyaluminum titanium silicate, stir in a water bath at 40°C for 2 hours, leave it at room temperature for aging for 12 hours, dry and grind at 40°C to obtain the product.

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Abstract

The invention discloses a polysilicate aluminum-titanium and chitosan composite flocculant. The polysilicate aluminum-titanium and chitosan composite flocculant is characterized by comprising an environment-friendly chitosan solution and a polysilicate aluminum-titanium solution, so that the environment-friendly and high-efficiency effects are realized. The polysilicate aluminum-titanium and chitosan composite flocculant is prepared by the following steps of (1) acidifying sodium silicate by sulfuric acid with certain concentration, stirring by water bath, aging, and the like, so as to prepare polysilicate; (2) preparing an aluminum salt solution, a titanium salt solution and a chitosan acetate solution; (3) blending with the polysilicate according to certain ratio, so as to prepare polysilicate aluminum-titanium salt; (4) adding the chitosan acetate solution, and aging, so as to obtain polysilicate aluminum-titanium and chitosan; (5) drying, and crushing. The polysilicate aluminum-titanium and chitosan composite flocculant provided by the invention has the advantages that by comprising the natural organic matter of chitosan and the polysilicate aluminum-titanium solution, the preparation method is simple, the property is stable, the problems of large usage amount of inorganic flocculant, poor bridging action, slower reaction speed of organic flocculant and high agent cost are solved, and the application prospect is broad.

Description

technical field [0001] The invention relates to the technical field of water treatment purifiers, in particular to a preparation method of a polyaluminum titanium silicate-chitosan composite flocculant. Background technique [0002] With the rapid development of industrialization, the derived industrial wastewater pollution problems continue to increase. The problem of water pollution needs to be solved urgently. At present, the most widely used aluminum salt flocculants have the problem of residual aluminum toxicity. Therefore, other metal salt flocculants have gradually become a research hotspot, hoping to replace aluminum salts. Titanium salts will hydrolyze and polymerize into polynuclear polymer products at lower pH, which can enhance the molecular weight and flocculation ability of flocculants, and the content is more than other common metals. It is expected to become a material to replace aluminum salts, and has been studied a lot. Chitosan is a natural polysaccharid...

Claims

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Application Information

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IPC IPC(8): C02F1/52
CPCC02F1/5263C02F1/5245
Inventor 娄大伟王润楠张浩韩雪祝波连丽丽王希越李秋颖
Owner JILIN INST OF CHEM TECH
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