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An Inorganic-Organic Composite Polymer Flocculant with High Aluminum Ion Concentration

A technology of composite polymer and ion concentration, applied in the field of flocculants, can solve the problems of no effect, low COD degradation rate in water, etc., and achieve the effects of short dropping time, COD removal and good flocculation performance

Active Publication Date: 2021-01-01
SHAANXI RES DESIGN INST OF PETROLEUM CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the degradation rate of flocculants to COD in water is very low or even ineffective, and the application of flocculation and sedimentation to remove COD in water is less

Method used

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  • An Inorganic-Organic Composite Polymer Flocculant with High Aluminum Ion Concentration
  • An Inorganic-Organic Composite Polymer Flocculant with High Aluminum Ion Concentration

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Add crystalline aluminum trichloride to a mixture of deionized water and concentrated hydrochloric acid (HCl mass concentration: 37%) with a mass ratio of 1:0.09 to prepare a 100 mL 2mol / L aluminum trichloride solution. Take 50mL of aluminum chloride solution and add 4.96g of dimethyloctadecyl (3-trimethoxysilylpropyl) ammonium chloride, stir rapidly with an electric stirrer until the two are evenly mixed, and then use a constant Add 200mL of 2mol / L sodium hydroxide aqueous solution dropwise at a constant speed to the obtained mixed solution with a flow peristaltic pump, and the dropwise addition is completed within 2 hours. Aluminum trichloride and dimethyloctadecyl (3-trimethoxysilylpropyl) The molar ratio of ammonium chloride and sodium hydroxide is 1:0.1:2. After the dropwise addition, the reaction is complete after standing, and an inorganic-organic composite polymer flocculant is obtained. The total aluminum concentration is 0.67mol / L, and the pH value is 4.1 .

Embodiment 2

[0021] Add crystalline aluminum trichloride to a mixed solution of deionized water and concentrated hydrochloric acid (HCl mass concentration: 37%) with a mass ratio of 1:0.08 to prepare 100 mL of 1.5 mol / L aluminum trichloride solution. Take 100mL of aluminum trichloride solution and add 22.33g of dimethyloctadecyl (3-trimethoxysilylpropyl) ammonium chloride, stir rapidly with an electric stirrer until the two are evenly mixed, and then use a constant Add 50 mL of 1.5 mol / L sodium hydroxide aqueous solution dropwise at a constant speed to the obtained mixed solution with a flow peristaltic pump, and the dropwise addition is completed in 1.5 hours. Aluminum trichloride and dimethyloctadecyl (3-trimethoxysilylpropyl ) The mol ratio of ammonium chloride and sodium hydroxide is 1:0.3:0.5, and after the dropwise addition, the standing reaction is complete to obtain an inorganic-organic composite macromolecule flocculant, whose total aluminum concentration is 1mol / L, and the pH valu...

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Abstract

The invention discloses an inorganic-organic composite polymeric flocculant with high aluminum ion concentration. The inorganic-organic composite polymeric flocculant is characterized in that crystallized aluminum chloride, concentrated hydrochloric acid, dimethyl octadecyl (3-trimethoxyallylsilane)ammonium chloride, and sodium hydroxide water solution are used as raw materials; the organic components and inorganic components are tightly bonded by covalent bonds through the dimethyl octadecyl (3-trimethoxyallylsilane)ammonium chloride, the synergistic function of inorganic flocculant and organic flocculant is fully realized, the turbidity and chromaticity in sewage are effectively decreased, and the suspended matters and COD (chemical on demand) in water are removed; the total aluminum concentration is high in the flocculant, the dosage amount of the fluocculant is reduced, and the flocculation property is good. The inorganic-organic composite polymeric flocculant has the advantages that the preparation method is simple, and the dripping time of alkaline liquid is shorter; by adding a small amount of concentrated hydrochloric acid, the hydrolyzing of aluminum chloride is effectively prevented, and the stable concentration of aluminum ions is ensured.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a flocculant for a coagulation and sedimentation section in water treatment. Background technique [0002] In the face of complex sewage systems, it is often difficult to achieve satisfactory treatment results with a single type of flocculant. The composite flocculant can overcome the shortcomings of using a single flocculant, showing better results than a single flocculant, and reducing costs. , which improves the flocculation performance, is a research hotspot of flocculants in recent years. Composite flocculant refers to a new type of flocculant that is produced by a series of reactions of two or more substances and can produce flocculent precipitation. According to the chemical composition, the composite flocculant can be divided into inorganic-inorganic composite flocculant, inorganic-organic composite flocculant and organic-organic composite flocculant....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/52C02F1/54
CPCC02F1/5236C02F1/54
Inventor 姚彬张文存朱瑞龙王丽莉王玲燕张玉荣孙玉鹏
Owner SHAANXI RES DESIGN INST OF PETROLEUM CHEM IND