Preparation method of polysilicate flocculant

A polysilicate, flocculant technology, applied in chemical instruments and methods, flocculation/sedimentation water/sewage treatment, silicon compounds, etc. The effect of saving resources, protecting the environment and wide application range

Inactive Publication Date: 2004-03-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These wastewaters are generally alkaline. If they are directly discharged into natural water bodies, as the pH decreases, the SiO 2 Gel or flocs sink out, forming white water, polluting water bodies, and blocking waterways. At present, there is no effective treatment method for waste glass mother liquor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] This example is the preparation of polymeric silicic acid.

[0024] At room temperature, 2.3% H 2 SO 4 100 grams of the solution were placed in a three-necked flask, and 100 grams of waste glass mother liquor (the main components were sodium silicate and sodium sulfate, and the concentration of sodium silicate was 2%) was added to mix with it. At this time, the pH of the solution was about 4, and slowly stirred for 4 hours. Static aging for 12 hours to generate polymeric silicic acid A.

Embodiment 2

[0026] This example is the preparation of polymeric silicic acid.

[0027] At 50°C, 6 g of 40% H 2 SO 4 The solution is placed in a three-necked flask equipped with a stirrer and a thermometer, and 100 grams of waste glass mother liquor with a concentration of 4% is added dropwise, adjusted to a pH of 2, stirred slowly for 2 hours, cooled and aged for 8 hours to obtain polymeric silicic acid B .

Embodiment 3

[0029] This embodiment is the preparation of polysilicon aluminum iron magnesium

[0030] Weigh 0.49 g of AlCl 3 ·6H 2 O, 0.05 g FeCl 3 ·6H 2 O and 0.02 g MgCl 2 In the three-necked bottle, add 60ml of deionized water to dissolve it, take 50ml of polysilicic acid A and drop it into the three-necked bottle in the dropping funnel, stir for 4 hours after the dropwise addition, and statically mature for 12 hours, the product A (M / SiO 2 = 0.1).

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Abstract

A process for preparing polysilicate flocculant includes such steps as adding the solution containing sodium silicate to acid, regulating pH=0.5-4, stirring, laying aside to obtain polysilic acid solution, mixing with metallic salt solution, stirring, regulating pH=0.5-4, and standing curing. Its advantages are low cost and environmental pollution.

Description

technical field [0001] The invention relates to a preparation method of a polysilicate flocculant, in particular to a preparation method of a polysilicate flocculant containing various ions. Background technique [0002] Polysilicate is a new type of inorganic polymer flocculant, which is developed on the basis of polysilicic acid (activated silicic acid) and traditional aluminum salts, iron salts and other inorganic flocculants. The composite product is a hot spot in the research of inorganic polymer flocculants at home and abroad. Because the metal ions are embedded in the polysilicate molecular chain, it not only has the electric neutralization effect of the metal ions, but also has the roll-sweep aggregation effect of the polysilicate, and the flocculation effect is better than other inorganic flocculants. Through the research on the flocculation mechanism of polysilicate metal salts, it is recognized that silicon in this type of flocculant is negatively charged anion, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/20C02F1/52C08G83/00
Inventor 张莉李本高王振宇
Owner CHINA PETROLEUM & CHEM CORP
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