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Covalent bond type inorganic organic composite flocculant, preparation process and use thereof

A composite flocculant and preparation technology, which is applied in the field of synthesis of polymer flocculants, can solve problems such as difficulty in maintaining the stability of flocculants and affecting the application of water treatment

Active Publication Date: 2008-11-05
PEKING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the "composite" of inorganic components and organic components in this type of composite flocculant is only loosely combined through coordination or electrostatic interaction, and it is difficult to maintain the stability of the flocculant, thus affecting the actual water treatment. application

Method used

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  • Covalent bond type inorganic organic composite flocculant, preparation process and use thereof
  • Covalent bond type inorganic organic composite flocculant, preparation process and use thereof
  • Covalent bond type inorganic organic composite flocculant, preparation process and use thereof

Examples

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example 1

[0017] Covalent bond type inorganic-organic composite flocculant, the total aluminum concentration is 0.2mol / L, the Si / Al molar ratio is 0.4, the alkalization degree B is 2.0, and the pH value is 4.4.

[0018] The preparation method is as follows:

[0019] Add 50 mL of AlCl with a concentration of 1.0 mol / L to the three-necked flask according to the predetermined Si / Al molar ratio. 3 solution and 4.32 mL of APDES. Then stir rapidly at room temperature, and slowly add 200 mL of NaOH solution with a concentration of 0.5 mol / L to the predetermined B value, that is, the number of moles of NaOH and AlCl 3 The ratio is 2.0, the titration time is 3 hours, and the obtained solution is left to stand until the reaction is complete to obtain a product with a total aluminum concentration of 0.2mol / L.

[0020] Application Example 1

[0021] The covalent bond type inorganic-organic composite flocculant product prepared in the above example 1 is used for the coagulation and turbidity remo...

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Abstract

The invention relates to a covalent bond type inorganic / organic compound flocculant, a production technique and an application thereof. The invention adopts Gamma-APDES (gamma-Aminopropylmethyldiethoxysilane) and aluminum chloride solution as the raw materials to produce the covalent bond type inorganic / organic compound flocculant by gradually dripping alkaline. The a covalent bond type inorganic / organic compound flocculant, the production technique and the application thereof have the advantages that the inorganic constituent and the organic constituent in the flocculant are bonded by covalent bond, which has good stability, good turbidity removal and decoloration effect and wider optimal dosing range. The covalent bond type inorganic / organic compound flocculant can be used for the water purification and the turbidity removal, decoloration, deoiling and solid-liquid separation during the wastewater treatment.

Description

technical field [0001] The invention belongs to the technical field of synthesis of polymer flocculants in the field of water treatment. Specifically, the invention relates to a covalent bond type inorganic-organic composite flocculant, a preparation process and application thereof. Background technique [0002] The coagulation process is the most widely used and most common unit operation technology in water treatment engineering. The effect of coagulation treatment directly determines the operating conditions of the subsequent treatment process, the final water quality and cost. The flocculation effect depends largely on the flocculant. Inorganic polymer flocculants and organic polymer flocculants are two types of flocculants that are widely used in water treatment. The price of inorganic polymer flocculant is relatively cheap, but it has the disadvantages of low molecular weight, poor stability in water, high dosage, and large amount of sludge generated. Organic polyme...

Claims

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Application Information

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IPC IPC(8): C02F1/52
Inventor 赵华章彭建雄孙娟娟
Owner PEKING UNIV
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