Aluminum chlorate of polymerized silicic acid and preparation technique

A kind of aluminum silicate chloride and preparation process technology, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of not particularly obvious effect, poor product stability, short storage time, etc., to improve the coagulation effect and low-cost production cost, the effect of improving the ability of impurities

Inactive Publication Date: 2007-02-21
上海天和环保科技有限公司
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the coagulation effect of the silicon-aluminum composite coagulant prepared by this type of preparation method is improved, the

Method used

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  • Aluminum chlorate of polymerized silicic acid and preparation technique
  • Aluminum chlorate of polymerized silicic acid and preparation technique
  • Aluminum chlorate of polymerized silicic acid and preparation technique

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0014] Example 1

[0015] Weigh 100 grams of 10% hydrochloric acid, heat to 50°C, add 7.5 grams of calcium aluminate powder, the calcium aluminate powder contains Al 2 o 3 % is 55% (m / v), containing 33% (m / v) of total calcium, containing SiO 2 was 7.0% (m / v), and stirred for 1 hour to obtain 2 o 3 3.5% (m / v); containing SiO 2 0.48% (m / v) AlCl 3 Liquid, add 9 grams of calcium aluminate powder to the above liquid, keep it at 80-110°C for 3 hours to get Al-containing 2 o 3 7% (m / v); containing SiO 2 The product is 0.45% (m / v), salinity is 80%, density is 1.20 g / mg, and pH value is 3.5.

Example Embodiment

[0016] Example 2

[0017] Weigh 100 grams of hydrochloric acid with a concentration of 15%, heat it to 50°C, add 11 grams of calcium aluminate powder, which contains Al 2 o 3 % is 50% (m / v), containing 30% (m / v) of total calcium, containing SiO 2 was 6.8% (m / v), and stirred for 1 hour to obtain 2 o 3 4.5% (m / v); containing SiO 2 0.8% (m / v) AlCl 3 Liquid, add 50 grams of water to the above liquid, add 13 grams of calcium aluminate powder, and keep it at 80-110 ° C for 3 hours to obtain Al-containing 2 o 3 6.5% (m / v); containing SiO 2 0.5% (m / v), a salinity of 80%, a density of 1.20 g / mg, and a pH of 3.5.

[0018] The following are the synthetic formula and the product ingredient table of the polyaluminum silicate chloride of the embodiment 1-4, and the preparation process of the embodiment 3-4 is the same as that of the embodiment 2.

[0019] No.

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Abstract

This invention relates to a method for preparing polyaluminum silicate chloride, with Al2O3 4-10% (m/v) and SiO2 0.1-0.5% (m/v). The polyaluminum silicate chloride has a base saturability of 70-90%, a density of 1.10-1.28 g/mL and a pH value of 3-4. The method comprises: (1) heating HCl to 40-70 deg.C, adding calcium aluminate powder, stirring and reacting for 0.5-1.5 h so that silicone and aluminum is dissolved in HCl to obtain high-activity AlCl3 solution containing polysilicate (SiO2 0.2-1.0% m/v); (2) adding a substrate that can neutralize HCl, and reacting at 80-110 deg.C for 1-4 h to form polyaluminum silicate chloride. The method has such advantages as good wastewater treatment effect, improved impurity-removing ability, good color degree, COD and phosphorous removing abilities, simple process.

Description

technical field [0001] The invention relates to a polysilicate aluminum chloride and a preparation process thereof, which can be used as a coagulant for the coagulation and sedimentation process in the water treatment process. [0002] Polyaluminum silicate chloride is used for primary enhanced flocculation of water supply and urban sewage, coagulation and sedimentation of wastewater treatment. Background technique [0003] In water treatment, coagulation sedimentation is an important unit operation step to remove colloidal suspended impurities and organic impurities in water. The effect of coagulation and settlement determines the final water treatment effect and the cost of water treatment. When the water treatment process is determined, the coagulation effect of the coagulant determines the effluent water quality of the final water treatment. At present, inorganic polymer coagulants such as polyaluminum chloride and polyaluminum ferric chloride have been widely used. Co...

Claims

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Application Information

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IPC IPC(8): C02F1/52
Inventor 何海鸿
Owner 上海天和环保科技有限公司
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