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A kind of preparation method of titanium-containing composite polyferric sulfate flocculant

A polyferric sulfate and flocculant technology, which is applied in chemical instruments and methods, flocculation/sedimentation water/sewage treatment, water/sludge/sewage treatment, etc. Excellent purification effect, high stability, and the effect of improving purification efficiency

Active Publication Date: 2020-12-11
NINGBO XINFU TITANIUM DIOXIDE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the current iron salt flocculants still need to improve the purification effect of micro-pollution, low-temperature, low-turbidity, and low-COD raw water

Method used

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  • A kind of preparation method of titanium-containing composite polyferric sulfate flocculant

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Embodiment 1

[0015] Example 1, a preparation method of a titanium-containing composite polyferric sulfate flocculant, obtained titanium ore acid hydrolysis solution, titanium white waste acid and ferrous sulfate heptahydrate through the sulfuric acid method titanium dioxide production process. Preparation of sol containing nano-titanium dioxide: Dilute the titanium ore acid solution with a concentration of 220g / L to 10g / L, take 1L of the diluted titanium ore acid solution, slowly add it to 1L of 50°C water, stir for 5h, the solution becomes cloudy . Add 0.1L of 15% spent acid solution, stir well and set aside. The waste acid is sulfuric acid.

[0016] Preparation of composite polymeric ferric sulfate flocculant: Add 200g of ferrous sulfate heptahydrate into the acidic nano-titanium dioxide sol for dissolution. The dissolution temperature is 40°C, and the dissolution time is 1 h. Add the oxidant hydrogen peroxide to oxidize and pass oxygen, and react at 80°C for 10 hours to obtain a comp...

Embodiment 2

[0017] Example 2, a preparation method of a titanium-containing composite polyferric sulfate flocculant, obtained titanium ore acid hydrolysis solution, titanium white waste acid and ferrous sulfate heptahydrate through the sulfuric acid method titanium dioxide production process. Preparation of nano-titanium dioxide sol: Add water to 0.1m3 titanium ore acid solution with a concentration of 200g / L and dilute it to 20g / L to obtain 1m3 titanium ore acid solution; heat the reaction kettle containing 1m3 water to 60°C, and titanate acid The solution solution was slowly added to the reaction kettle, stirred for 2 hours, the solution became turbid, and 0.1m3 of 15% waste acid solution was added, and the acidic titanium dioxide sol was obtained by stirring evenly. The waste acid is sulfuric acid.

[0018] Preparation of composite polymeric ferric sulfate flocculant: Add 0.2t of ferrous sulfate heptahydrate into the acidic nano-titanium dioxide sol to dissolve. The dissolution temper...

Embodiment 3

[0019] Example 3, a preparation method of a titanium-containing composite polyferric sulfate flocculant, obtained titanium ore acid hydrolysis solution, titanium white waste acid and ferrous sulfate heptahydrate through the sulfuric acid method titanium dioxide production process. Preparation of sol containing nano-titanium dioxide: Dilute the titanium ore acid solution with a concentration of 100g / L to 5g / L, take 1L of the diluted titanium ore acid solution, slowly add it to 1L of 90°C water, stir for 1h, the solution becomes cloudy . Add 0.2L of 10% spent acid solution, stir well and set aside. The waste acid is sulfuric acid.

[0020] Preparation of composite polymeric ferric sulfate flocculant: add 300g of ferrous sulfate heptahydrate into the acidic nano-titanium dioxide sol to dissolve. The dissolution temperature is 70°C, and the dissolution time is 1h. Add the oxidant sodium chlorate to oxidize and pass high-pressure oxygen, and react at 90°C for 2 hours to obtain a...

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Abstract

The invention provides a preparation method of a titanium-containing composite polyferric sulfate flocculating agent, and relates to the field of polyferric sulfate preparation. The method comprises the following steps of step 1, preparing a sol containing nanometer titanium dioxide; adding sulphuric acid into titanium dioxide sol to obtain acidic nanometer titanium dioxide sol; step 2, preparingthe composite polyferric sulfate flocculating agent; dissolving ferrous sulfate heptahydrate by the acidic nanometer titanium dioxide-containing solution; preparing composite polyferric sulfate by a chlorate oxidation method, or a hydrogen peroxide oxidation method or a nitrite catalysis method. The prepared composite polyferric sulfate flocculating agent contains nanometer titanium dioxide; the flocculating effect and the photocatalysis effect are achieved; the purification effect on low-pollution low-temperature low-turbidity and low-COD raw water is excellent.

Description

technical field [0001] The invention relates to the field of preparation of polyferric sulfate. Background technique [0002] Inorganic polymeric coagulants and flocculants are widely used in the treatment of drinking water and sewage. Due to the direct biological toxicity of residual aluminum, iron salt coagulants gradually replace the application of aluminum salt coagulants in water treatment. Polymerized ferric sulfate flocculant is a new type, high-quality, high-efficiency iron salt inorganic polymer flocculant, it has excellent coagulation performance, dense alum flowers, fast settling speed; , Algae removal, removal of COD, BOD and heavy metal ions in water, etc. have remarkable effects. However, the current iron salt flocculants still need to improve the purification effect of micro-pollution, low-temperature, low-turbidity, and low-COD raw water. In view of the above problems, the present invention provides a flocculant containing titanium polyferric sulfate for e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/52C02F1/30
CPCC02F1/30C02F1/5245
Inventor 邵国雄陆祥芳刘志慧童育峰张静海
Owner NINGBO XINFU TITANIUM DIOXIDE