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New composite ethyl orthosilicate-polyaluminium chloride flocculant preparation method

A technology of tetraethyl orthosilicate and polyaluminum chloride, which is applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of low content and difficulty in functioning, and achieve enhanced adsorption and bridging ability, good coagulation effect, The effect of widening the range of use

Inactive Publication Date: 2015-09-16
NANTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Recent studies on polymeric aluminum have shown that aluminum 30 (Al30) is also a dominant coagulation form, which has a higher charge and a larger spatial scale than aluminum 13, but due to its presence in the traditional polymeric chlorine The content of aluminum chloride products is extremely low, and it is difficult to play a role. Therefore, how to increase the content of Al30 in polyaluminum chloride has become a goal for the development of coagulants in the future.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0025] (1) Preparation of polyaluminum chloride solution:

[0026] A polyaluminum chloride solution with a total aluminum concentration of 0.2M and a degree of alkalinity of 2.4 was prepared by slowly adding alkali and stirring.

[0027] (2) High temperature aging treatment:

[0028] The prepared polyaluminum chloride is matured at a high temperature in a closed reaction kettle at a temperature of 90°C. After aging for 48 hours, a certain amount of ethyl orthosilicate is added to make the molar ratio of silicon to aluminum in the polysilicon aluminum chloride 0.01, continue high-temperature aging for 2 hours, and keep stirring during this process to fully mix the materials.

[0029] (3) cooling:

[0030] The product prepared above is naturally cooled to room temperature to obtain the final product, wherein the content of aluminum 30 is 40%, and the molar ratio of silicon to aluminum is 0.01.

specific Embodiment 2

[0031] (1) Preparation of polyaluminum chloride solution:

[0032] A polyaluminum chloride solution with a total aluminum concentration of 0.2M and a degree of alkalinity of 2.4 was prepared by slowly adding alkali and stirring.

[0033] (2) High temperature aging treatment:

[0034] The polyaluminum chloride is matured at a high temperature in a closed reaction kettle at a temperature of 90°C. After aging for 48 hours, a certain amount of ethyl orthosilicate is added to make the molar ratio of silicon to aluminum in the polysilicon aluminum chloride 0.05. Continue high-temperature aging for 2 hours, and keep stirring during this process to fully mix the materials.

[0035] (3) cooling:

[0036] The product prepared above is naturally cooled to room temperature to obtain the final product, wherein the content of aluminum 30 is 30%, and the molar ratio of silicon to aluminum is 0.05.

specific Embodiment 3

[0037] A preparation method of a novel composite tetraethyl orthosilicate aluminum chloride flocculant comprises the following steps:

[0038] (1) Preparation of polyaluminum chloride solution:

[0039] A polyaluminum chloride solution with a total aluminum concentration of 0.2M and a degree of alkalinity of 2.4 was prepared by slowly adding alkali and stirring.

[0040] (2) High temperature aging treatment:

[0041] The polyaluminum chloride is matured at a high temperature in a closed reaction kettle at a temperature of 90°C. After 48 hours of maturation, a certain amount of ethyl orthosilicate is added to make the molar ratio of silicon to aluminum in the polysilicon aluminum chloride 0.1. Continue to ripen at high temperature for 2 hours, and keep stirring during this process to fully mix the materials;

[0042] (3) cooling:

[0043] The product prepared above is naturally cooled to room temperature to obtain the final product, wherein the content of aluminum 30 is 25%,...

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PUM

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Abstract

The invention discloses a new composite ethyl orthosilicate-polyaluminium chloride flocculant preparation method. Through high temperature curing processing of traditional polyaluminium chloride, higher content of aluminum 30 form can be obtained, during curing, ethyl orthosilicate is introduced, and a new composite ethyl orthosilicate-polyaluminium chloride flocculant product is synthesized; the new composite ethyl orthosilicate-polyaluminium chloride flocculant product contains high content of nano aluminum 30 and silicon sol, can play efficient electricity neutralization capability of the aluminum 30, and can play the adsorption bridge enhancement capacity of the silicon sol, better effect of coagulation can be achieved, the use range of the flocculant can be broadened, and the problems of not good flocculation effect and narrow feed dose range of the traditional polyaluminium chloride flocculant can be solved.

Description

technical field [0001] The invention belongs to the fields of drinking water safety guarantee and various sewage treatment, and in particular relates to a preparation method of a novel composite tetraethyl orthosilicate-polyaluminum chloride flocculant. 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 performance, high safety, and wide adaptability. Therefore, it has been widely used and developed rapidly in the field of water treatment at home and abroad. Among them, polyaluminum chloride (PAC) is the inorganic polymer flocculant variety with the most mature industrial production technology, the highest efficiency and the most widely used. It is generally believed that the form of aluminum thirteen (Al13) in polya...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52
Inventor 叶长青朱奇蒋冬冬王小平
Owner NANTONG UNIVERSITY
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