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Composite polyaluminum silicate chloride and preparation method thereof

A polysilicon aluminum chloride and polyaluminum chloride technology, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve problems such as cost control and safety risks, achieve high-efficiency electrical neutralization ability, enhance adsorption bridging ability, The effect of excellent coagulation performance

Inactive Publication Date: 2013-07-03
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to increase the adsorption and bridging ability of inorganic polymer coagulants, inorganic-organic compounding and graft modification have also been done, and some results have been achieved. However, the added organic matter makes the coagulant face potential problems during use. security risks, cost control and other issues

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] The polyaluminum chloride is cured at a high temperature in a closed reactor, the temperature is controlled at 90°C, and after 40 hours of curing, an active silica sol with a pH value of 7.0 is added to make the molar ratio of silicon to aluminum in the polyaluminum chloride to 0.4. Continue to mature at high temperature for 2 hours and stir to mix the materials thoroughly. The overall curing time is controlled to 42 hours, and finally the product is taken out by natural cooling to room temperature. The content of aluminum 30 is 35%, and the molar ratio of silicon to aluminum is 0.05.

Embodiment 2

[0014] The polyaluminum chloride is cured at a high temperature in a closed reactor, and the temperature is controlled at 95°C. After curing for 20 hours, the active silica sol with pH value of 7.0 is added according to the ratio of the molar ratio of silicon to aluminum in the polysilicate aluminum chloride to 0.2 , Continue to keep the temperature for 12 hours, and continue to stir during the maturation process to fully mix the materials. The overall maturation time is 32 hours, with natural cooling. Finally, it is cooled to room temperature and the product is taken out; the content of aluminum 30 is 25%.

Embodiment 3

[0016] The polyaluminum chloride is matured at a high temperature in a closed reaction kettle, and the temperature is controlled at 80°C. After aging for 15 hours, an active silica sol with a pH value of 7.0 is added at the molar ratio of silicon to aluminum at a ratio of 0.3, and the temperature is kept for 0.5 hours. Continuous stirring during the maturation process makes the materials fully mixed; the overall maturation time is controlled to 15.5 hours, and it is naturally cooled. Finally, it is cooled to room temperature and the product is taken out; the content of aluminum 30 is 20%.

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Abstract

The invention discloses composite polyaluminum silicate chloride and a preparation method thereof, belonging to the technical field of preparation of inorganic composite macromolecular flocculants. The composite polyaluminum silicate chloride is prepared by the steps of curing traditional polymeric aluminium chloride at high temperature and compositing with active silica sol, and has the nano Al30 content between 10% and 40%, wherein the proportion of silicon to aluminum is between 0.02-0.5. The composite polyaluminum silicate chloride can exert the high-efficiency electrical neutralization capability of the Al30 and exert a better flocculation effect due to the enhanced adsorption bridging capability, and is beneficial to broadening of application range of flocculants.

Description

Technical field [0001] The invention belongs to the technical field of preparation of inorganic composite polymer flocculants, and particularly relates to a composite polysilicate aluminum chloride and a preparation method thereof. Specifically, the method relates to a preparation technology of a nano-type inorganic composite polymer flocculant, which is used for high-temperature curing of traditional polyaluminum chloride and compounded with active silica sol. The product contains a relatively high content of nano-aluminum 30 and silica sol, with excellent coagulation effects, and can be widely used in drinking water safety and various sewage treatment fields. Background technique [0002] In the field of water treatment technology today, inorganic polymer flocculants are special chemicals that are used in large quantities. Compared with traditional flocculants, it can significantly improve the purification efficiency, and has the advantages of low dosage, good settling perform...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/52
Inventor 叶长青
Owner TSINGHUA UNIV
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