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Composite polyaluminum silicate chloride and preparation method thereof

A polysilicon aluminum chloride, curing technology, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of cost control, safety risk, etc., achieve high-efficiency electrical neutralization ability, enhance adsorption bridging ability, and broaden the scope of use Effect

Inactive Publication Date: 2011-06-15
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] Carry out high-temperature aging of polyaluminum chloride in a closed reaction kettle, the temperature is controlled at 90°C, and after aging for 40 hours, an active silica sol with a pH value of 7.0 is added to make the molar ratio of silicon to aluminum in polysilicon aluminum chloride 0.4, Continue high-temperature curing for 2 hours, and stir to make the materials fully mixed. The overall aging time is controlled to be 42 hours, and finally the product is naturally cooled to room temperature and taken out, wherein the content of aluminum 30 is 35%, and the molar ratio of silicon to aluminum is 0.05.

Embodiment 2

[0014] Carry out high-temperature curing of polyaluminum chloride in a closed reaction kettle, the temperature is controlled at 95°C, after curing for 20 hours, add active silica sol with a pH value of 7.0 according to the ratio of the molar ratio of silicon to aluminum in polysilicon aluminum chloride is 0.2 , continue to keep warm for 12 hours, and keep stirring during the aging process to fully mix the materials. The overall aging time is 32 hours, with natural cooling. Finally, cool to room temperature and take out the product; wherein the content of aluminum 30 is 25%.

Embodiment 3

[0016] Carry out high-temperature curing of polyaluminum chloride in a closed reaction kettle, the temperature is controlled at 80°C, and after curing for 15 hours, the active silica sol with a pH value of 7.0 is added according to the ratio of the molar ratio of silicon to aluminum of 0.3, and the heat preservation is continued for 0.5 hours. During the aging process, the materials were continuously stirred to fully mix; the overall aging time was controlled at 15.5 hours, and cooled naturally. Finally, cool to room temperature and take out the product; wherein the aluminum content is 20%.

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PUM

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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 macromolecule flocculants, and in particular relates to a composite polysilicon aluminum chloride and a preparation method thereof. Specifically, the method relates to a preparation technology of a nano-type inorganic composite macromolecular flocculant, which involves curing traditional polyaluminum chloride at high temperature and compounding active silica sol. This product contains high content of nano-alumina 30 and silica sol, has excellent coagulation effect, and can be widely used in drinking water safety protection and various sewage treatment fields. Background technique [0002] In the field of water treatment technology today, inorganic polymer flocculants are special chemical agents used in large quantities. Compared with traditional flocculants, it can significantly improve the purification efficiency, and has the advantages of low dosage, good settling per...

Claims

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Application Information

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IPC IPC(8): C02F1/52
Inventor 叶长青
Owner TSINGHUA UNIV
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