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Polysilicate aluminum sulphate flocculant, preparation process and use thereof

A preparation process and flocculant technology, which is applied in the field of polymer flocculant synthesis, can solve problems such as poor product reproducibility and difficulty in practical application, and achieve high molecular weight, good product reproducibility, and uniform distribution of silicon and aluminum Effect

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, this type of preparation method is easy to form block copolymers of aluminum and silicon or their respective homopolymers, and the reproducibility of the products is not good, which brings certain difficulties to the actual application of the products.

Method used

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  • Polysilicate aluminum sulphate flocculant, preparation process and use thereof
  • Polysilicate aluminum sulphate flocculant, preparation process and use thereof
  • Polysilicate aluminum sulphate flocculant, preparation process and use thereof

Examples

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Effect test

example 1

[0019] Polysilicon aluminum flocculant, the total aluminum concentration is 0.07mol / L, the Si / Al molar ratio is 0.2, the degree of alkalization B is 2.5, and the pH value is 3.8.

[0020] The preparation method is as follows:

[0021] At room temperature, add 50 mL of AlCl with a concentration of 0.25 mol / L in proportion to the three-necked flask 3 solution and 0.58mL of TEOS, then stirred rapidly at room temperature, and slowly added 125mL of NaOH solution with a concentration of 0.25mol / L to the required amount using a constant flow pump. 3 The ratio is 2.5, the reaction is complete after dropping, the obtained solution is left to stand until the reaction is complete, and the polysilicon aluminum flocculant is obtained after 24 hours.

example 2

[0023] Polysilicon aluminum flocculant, the total aluminum concentration is 0.2mol / L, the Si / Al molar ratio is 0.4, the degree of alkalization B is 2.0, and the pH value is 3.5.

[0024] The preparation method is as follows:

[0025] 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 4.61 mL of TEOS. Then stir rapidly at room temperature, and use a constant flow pump to slowly add 200 mL of NaOH solution with a concentration of 0.5 mol / L to the predetermined B value. 3 The ratio was 2.0, and the titration time was 3 hours. The resulting solution was allowed to stand until the reaction was complete. After 2 days, a product with a total aluminum concentration of 0.2 mol / L was obtained.

[0026] Application Example 1

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Abstract

The invention relates to a poly-aluminum silicate chloride (PASC) flocculant, a production technique and an application thereof. The invention adopts the tetra ethyl ortho silicate (TEOS) as the silicon source, which is mixed with aluminum chloride solution and is gradually dripped with alkaline to obtain the PASC flocculant. The poly-aluminum silicate chloride (PASC) flocculant, the production technique and the application thereof have the advantages that the silicon and aluminum distribution in the PASC flocculant is more uniform, the molecular weight is bigger and the product has better reproduction quality reproduction quality; at the same time, the product has good turbidity removal and decoloring effect, and the content of the residual aluminum is low and is less affected by the PH value; also, the product is an efficient water treatment agent with wider optimal chemical dosing range. The invention can be widely 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 relates to the technical field of synthesis of polymer flocculants in the field of water treatment, in particular, the invention relates to a polysilicon aluminum flocculant, a preparation process and its application. Background technique [0002] In the water treatment process, the coagulation process is one of the most common key technical links. It determines the operating conditions of the subsequent process, the final water quality and cost. The quality of the coagulation effect depends on the flocculant, so the preparation of the flocculant has always been in a relatively important position. As the second generation of flocculants, inorganic polymer flocculants (IPOs) have the advantages of better flocculation effect than traditional flocculants (aluminum salt, iron salt, silicic acid, etc.), and the price is lower than organic flocculants. Its research and application developed rapidly in the past few decades. [0003] Polysilic...

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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