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Method for prolonging stabilization time by adding stabilizer into polysilicate flocculant

A technology of polysilicate and polysilicate metal salt, which is applied in the direction of flocculation/precipitation water/sewage treatment, etc., can solve the problems of poor stability, prolong the gelling time and stability time of polysilicate flocculant, and achieve the synthesis The effect of low cost, good application prospect and simple preparation method

Inactive Publication Date: 2012-09-26
XINJIANG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The object of the present invention is: by adding stabilizer, prolong polysilicate flocculant gelling time and stabilization time, solve the shortcoming of poor stability

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Add 10 mL of 6 mol / L sulfuric acid into a 250 mL beaker. Dissolve 11.7g Na with 30mL distilled water 2 SiO 3 9H 2 O to obtain a sodium silicate solution, which was added dropwise into sulfuric acid to adjust the pH to 2, and then activated for 10 minutes to obtain polysilicic acid. Add 2 mL of saturated sodium acetate solution. Calculate Z according to the zinc-silicon ratio equal to 1:1 n SO 4 ·7H 2 O 11.6g, weigh zinc sulfate and dissolve it with distilled water to form a saturated solution, add it dropwise to the polysilicate solution, and then mature for 10 min to obtain a stable zinc polysilicate flocculant. The time for viscous silica gel to appear is 7 days.

Embodiment 2

[0016] Add 10 mL of 6 mol / L sulfuric acid into a 250 mL beaker. Dissolve 11.7g Na with 30mL distilled water 2 SiO 3 9H 2 O to obtain a sodium silicate solution, which was added dropwise into sulfuric acid to adjust the pH to 2, and then activated for 15 minutes to obtain polysilicic acid. Add 6 mL of saturated sodium acetate solution. Calculate Z according to the zinc-silicon ratio equal to 1:1 n SO 4 ·7H 2 O 11.6g, weigh zinc sulfate and dissolve it with distilled water to form a saturated solution, add it dropwise to the polysilicate solution, and then mature for 15 minutes to obtain a stable zinc polysilicate flocculant. The time for viscous silica gel to appear is 10 days.

Embodiment 3

[0018] Add 10 mL of 6 mol / L sulfuric acid into a 250 mL beaker. Dissolve 11.7g Na with 30mL distilled water 2 SiO 3 9H 2 O to obtain a sodium silicate solution, which was added dropwise into sulfuric acid to adjust the pH to 2, and then activated for 20 minutes to obtain polysilicic acid. Calculate Z according to the zinc-silicon ratio equal to 1:1 n SO 4 ·7H 2 O 11.8g, weigh zinc sulfate and dissolve it with 25ml of distilled water to form a saturated solution, add it dropwise to the polysilicate solution, and then mature for 20min. Add 2mL of saturated sodium acetate solution to obtain a stable polysilicate zinc flocculant. The time for viscous silica gel to appear is 7 days.

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PUM

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Abstract

The invention provides a preparation method for prolonging stabilization time of polysilicate, belonging to the field of flocculant synthesis. The preparation method comprises the following steps: acidifying silicate, which is diluted to a certain concentration, with acid to obtain polysilicic acid; obtaining corresponding polysilicate flocculants according to different metal-silicon mol ratios; and adding different amounts of stabilizer to obtain the stable polysilicate flocculant. The gelation time of the flocculant is longer than that of the flocculant without any stabilizer, and the flocculant has stable turbidity elimination performance.

Description

technical field [0001] The invention relates to a method for adding a stabilizer to a polysilicate flocculant to prolong the stability time, and belongs to the field of flocculant synthesis. Background technique [0002] With the development of industry and urbanization, the discharge of industrial wastewater and domestic wastewater continues to increase, and water resources are limited, so water treatment and reuse are particularly important. Common water treatment methods include biochemical method, coagulation sedimentation method, ion exchange method, chemical oxidation method, etc. Among them, coagulation sedimentation method is widely used because of its low treatment cost. The performance of the coagulant determines the effect of the coagulation treatment. Compared with flocculants such as polyaluminum and polyiron commonly used at present, polysilicate flocculants have the advantages of large alum flowers, compactness, and fast settling speed under the condition of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52
Inventor 王雪枫黄雪莉吴林后
Owner XINJIANG UNIVERSITY
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