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Oxidized and dimethyl diallyl ammonium chloride composite modified ferrosilicon coagulant and preparation method thereof

A dimethyl diallyl ammonium chloride, compound modification technology, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., to achieve the effect of wide source, high positive charge density and high efficiency

Inactive Publication Date: 2012-02-08
UNIV OF JINAN +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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  • Oxidized and dimethyl diallyl ammonium chloride composite modified ferrosilicon coagulant and preparation method thereof
  • Oxidized and dimethyl diallyl ammonium chloride composite modified ferrosilicon coagulant and preparation method thereof
  • Oxidized and dimethyl diallyl ammonium chloride composite modified ferrosilicon coagulant and preparation method thereof

Examples

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Embodiment 1

[0038]Dilute 20L of water glass with 65L of water to the desired concentration. Add the diluted water glass to 5L of 40% dilute sulfuric acid solution at a temperature of 20°C to 50°C and stirring at 300 rpm to 500 rpm, and control the pH to 4. After 6 minutes Stop stirring and polymerize for 1 hour to obtain activated silicic acid for use. At a temperature of 35°C to 60°C, add 57kg of ferrous sulfate heptahydrate to 31L of 40% dilute sulfuric acid solution, and stir for 10 minutes at a speed of 200 to 500 rpm to obtain ferrous sulfate iron solution. At a temperature of 35°C to 60°C and a stirring speed of 200 rpm to 500 rpm, the activated silicic acid to be used, 4.2L of dimethyl diallyl ammonium chloride and 3.5kg of chloric acid Sodium was added to the above-mentioned ferrous sulfate solution at the same time, and the stirring was stopped after 15 minutes to obtain a semi-finished composite modified ferrosilicon coagulant. Put the semi-finished composite modified ferrosi...

Embodiment 2

[0040] Dilute 20L of water glass with 80L of water to the desired concentration. Add the diluted water glass to 5L of 40% dilute sulfuric acid solution at a temperature of 20°C to 50°C and stirring at 300 rpm to 500 rpm, and control the pH to 3. After 6 minutes Stop stirring and polymerize for 2 hours to obtain activated silicic acid for use. At a temperature of 35°C to 60°C, add 30kg of ferrous sulfate heptahydrate to 18L of 40% dilute sulfuric acid solution, and stir for 10 minutes at a speed of 200 to 500 rpm to obtain ferrous sulfate iron solution. At a temperature of 35°C to 60°C and a stirring speed of 200 rpm to 500 rpm, the activated silicic acid to be used, 3.8 L of dimethyl diallyl ammonium chloride and 2.5 kg of chloric acid Sodium was added to the above-mentioned ferrous sulfate solution at the same time, and the stirring was stopped after 15 minutes to obtain a semi-finished composite modified ferrosilicon coagulant. Put the semi-finished composite modified fer...

Embodiment 3

[0042] Dilute 20L of water glass with 90L of water to the desired concentration. Under the condition of stirring at a temperature of 20°C to 50°C and 300 rpm to 500 rpm, add the above diluted water glass to 5L of 40% dilute sulfuric acid solution, and control the pH value to 2.5. After 6 minutes, Stop stirring and polymerize for 3 hours to obtain activated silicic acid for use. At a temperature of 35°C to 60°C, add 16kg of ferrous sulfate heptahydrate to 13.3L of 40% dilute sulfuric acid solution, and stir for 10 minutes at a speed of 200 to 500 rpm to obtain sulfuric acid ferrous solution. At a temperature of 35°C to 60°C and a stirring speed of 200 rpm to 500 rpm, the activated silicic acid to be used, 2.8L of dimethyl diallyl ammonium chloride and 1.4kg of chloric acid Sodium was added to the above-mentioned ferrous sulfate solution at the same time, and the stirring was stopped after 15 minutes to obtain a semi-finished composite modified ferrosilicon coagulant. Put the...

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Abstract

The invention provides an oxidation and dimethyl diallyl ammonium chloride composite modified ferrosilicon coagulant and a preparation method thereof. The coagulant uses industrial grade or industrial by-products as raw materials and dimethyl diallyl ammonium chloride as an additive. The appearance is a light yellowish brown liquid or light yellow solid product, which has both oxidizing properties, high positive charge density and strong flocculation. Ability, compound function increased, efficiency of color removal, algae and organic matter etc. improved. The preparation process adopts the oxidative copolymerization method, the production process is under normal pressure, the temperature of the reaction kettle is 20°C-60°C, and there is no secondary pollution. The production equipment and process are simple, economical and applicable. There are many curing processes for the preparation of solid products, and the appropriate curing process can be selected according to actual requirements and on-site production conditions. For the printing and dyeing wastewater after secondary biochemical treatment, the COD drops below 80-120 mg / L, and the chromaticity drops below 30-50. The composite modified ferrosilicon coagulant of the present invention can be applied to the fields of urban water supply and sewage, industrial water supply and wastewater treatment, etc., and is especially suitable for waste water such as papermaking, textile printing and dyeing, and daily chemical industry with high chroma or containing refractory organic matter.

Description

technical field [0001] The invention belongs to water treatment coagulants, and relates to oxidation and dimethyl diallyl ammonium chloride composite modified ferrosilicon coagulants and a preparation method thereof. Background technique [0002] The rapid development of industry and agriculture has seriously polluted my country's water resources, and it is getting worse. In order to avoid the continuous shortage of water resources, reduce the environmental pollution caused by wastewater, and strengthen the social cycle of water, it is necessary to strengthen the pollution control of industrial wastewater and domestic sewage. In the water treatment process, coagulation settlement is the most widely used and low-cost key technology unit, so it has become one of the important research focuses in the field of municipal engineering and environmental engineering. The performance of coagulants is one of the main factors that determine the efficiency of coagulation and pollution r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/52
Inventor 付英高宝玉付旻舸
Owner UNIV OF JINAN