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Method for preparing metal polysilicate flocculant

A polysilicate metal salt and flocculant technology, applied in the field of water treatment, can solve the problems of high cost, achieve good stability, good flocculation effect, and wide application range

Inactive Publication Date: 2011-06-22
HANGZHOU RONGSHENG ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the cost of these polysilicate metal salt flocculants is relatively high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Prepare polysilicate metal salt flocculant, concrete steps are:

[0014] 1) 20 grams of vitriol (FeSO 4 ·7H 2 (2), 40 grams of titanium dioxide waste acid, and 40 grams of industrial potassium chlorate join in the reaction vessel, stirred and reacted at 35 DEG C for 3 hours to obtain viscous polyferric sulfate;

[0015] 2) take by weighing 203 grams of sodium silicate (Na 2 SiO 3 , containing 100 g SiO 2 ) is diluted with water to form SiO 2 An aqueous solution of sodium silicate with a weight content of 2%, the pH value of the solution is adjusted to 3.5 with waste acid, stirring and polymerizing at room temperature for 10 minutes to obtain a polysilicate solution;

[0016] 3) Take 100 grams of the above-mentioned polyferric sulfate and add it to the polysilicate solution, stir evenly, and then activate it for 10 hours to obtain the polysilicate metal salt flocculant.

Embodiment 2

[0018] Prepare polysilicate metal salt flocculant, concrete steps are:

[0019] 1) 50 grams of vitriol (FeSO 4 ·7H 2 (2), 100 grams of titanium dioxide waste acid, and 50 grams of industrial potassium chlorate join in the reaction vessel, stirred and reacted at 50 DEG C for 2 hours to obtain viscous polyferric sulfate;

[0020] 2) take by weighing 203 grams of sodium silicate (Na 2 SiO 3 , containing 100 g SiO 2 ) is diluted with water to form SiO 2 A sodium silicate aqueous solution with a weight content of 3%, the pH value of the solution is adjusted to 4.5 with waste acid, stirring and polymerizing at room temperature for 30 minutes to obtain a polysilicate solution;

[0021] 3) Take 200 grams of the above-mentioned polyferric sulfate and add it into the polysilicate solution, stir evenly, and then activate it for 24 hours to obtain the polysilicate metal salt flocculant.

Embodiment 3

[0023] Prepare polysilicate metal salt flocculant, concrete steps are:

[0024] 1) 45 grams of vitriol (FeSO 4 ·7H 2 (2), 90 grams of titanium dioxide waste acid, and 60 grams of industrial potassium chlorate join in the reaction vessel, stirred and reacted at 45 DEG C for 2.5 hours to obtain viscous polyferric sulfate;

[0025] 2) take by weighing 473 grams of sodium silicate (Na 2 SiO 3 9H 2 O, containing 100 grams of SiO 2 ) is diluted with water to form SiO 2 A sodium silicate aqueous solution with a weight content of 2.5%, the pH value of the solution is adjusted to 4 with waste acid, stirring and polymerizing at room temperature for 20 minutes to obtain a polysilicate solution;

[0026] 3) Weigh 150 grams of the above-mentioned polyferric sulfate and add it into the polysilicate solution, stir evenly and then activate it at rest for 18 hours to obtain the polysilicate metal salt flocculant.

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PUM

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Abstract

The invention relates to a method for preparing a metal polysilicate flocculant. At present, the metal polysilicate flocculant is higher in production cost. The method comprises the following steps of: adding green vitriol and waste acid which are produced during production of titanium white into a reaction vessel together with industrial potassium chlorate and stirring to obtain viscous polymeric ferric sulfate; adding water to dilute sodium silicate into sodium silicate aqueous solution, wherein the weight content of SiO2 in the sodium silicate aqueous solution is 2 to 3 percent; adding the waste acid which is produced during the production of the titanium white into the sodium silicate aqueous solution, adjusting pH value of the sodium silicate aqueous solution to be between 3.5 and 4.5, and stirring at normal temperature to obtain polysilicate solution; and adding the polymeric ferric sulfate into the polysilicate solution, uniformly stirring, standing and activating for 10 to 24 hours to obtain the metal polysilicate flocculant. A byproduct produced by the production of the titanium white is low in cost; and the prepared flocculant has the characteristics of high stability, wide application range and good flocculation effect.

Description

technical field [0001] The invention belongs to the technical field of water treatment and relates to a preparation method of a polysilicate metal salt flocculant. Background technique [0002] Polysilicate metal salt is a new type of composite inorganic polymer flocculant, which is a composite product of polysilicate and metal salt developed on the basis of polysilicate and traditional flocculants such as aluminum salt and iron salt. Because this type of flocculant combines the electric neutralization ability of metal ions and the adsorption and bridging net capture effect of polysilicate, it is different from traditional inorganic flocculants (such as aluminum sulfate, ferric chloride, ferrous sulfate, polyaluminum chloride ( Compared with polyferric sulfate (PFS), etc.), PAC) has the advantages of early generation of alum flowers, large alum flowers, and fast sedimentation speed, and still has good flocculation effect under low temperature and low turbidity conditions, wh...

Claims

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Application Information

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IPC IPC(8): C02F1/52
Inventor 俞天明聂秋林陈建军
Owner HANGZHOU RONGSHENG ENVIRONMENTAL PROTECTION TECH
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