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Method of preparing poly aluminum chloride flocculant and poly aluminum silicate chloride flocculant simultaneously

A technology of chlorinated aluminum silicate and polyaluminum chloride, which is applied in chemical instruments and methods, flocculation/sedimentation water/sewage treatment, water/sewage treatment, etc. and other problems, to achieve the effect of good coagulation and turbidity removal, cost saving and healthy development.

Inactive Publication Date: 2017-02-22
LESHAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent "New Method for Synthesis of Copolymerized Silicate Flocculant" (Patent No.: 200910300930.8) In the middle and late stage of the polymeric chloride flocculant synthesized by the traditional method or to the existing polymeric chloride liquid flocculant, add perchlorosilane Modified to obtain a polysiliconate flocculant with better turbidity removal effect, but the method does not make full use of the hydrolysis of chlorosilane to produce a large amount of hydrochloric acid, so the amount of chlorosilane is relatively small

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024]A method for preparing polyaluminum chloride flocculant and polyaluminum chlorosilicate flocculant at the same time, said method is to add 120g of calcium aluminate powder to 400g of water and stir to make a suspension, then continue to stir and add 200g of four When the temperature of the silicon chloride raffinate reaches 40°C, add 400g of water to completely hydrolyze the silicon tetrachloride in the silicon tetrachloride raffinate, and finally control the temperature of the reaction system to be 85-88°C, the pH to be 2.2, and the basicity React for 4 hours under the condition of 45%, and then stand still to separate the liquid to obtain polyaluminum chloride liquid flocculant and polyaluminum chloride silicate liquid flocculant.

Embodiment 2

[0026] This embodiment takes laboratory preparation as an example for illustration.

[0027] A method for preparing polyaluminum chloride flocculant and polyaluminum chlorosilicate flocculant at the same time. Take a dry and clean 3000ml beaker, add 120g of calcium aluminate powder to the beaker, add 500g of distilled water, and fully stir for 10 minutes to make a suspension Then slowly add 170g of silicon tetrachloride residual solution in the fume hood, when the temperature rises to 45°C, add 500g of distilled water, and finally control the temperature at 89-92°C, pH at 2.0, and basicity at 50 % under the condition of reaction for 5 hours, after the reaction, let it stand for 48 hours to mature, divided into three layers, the upper layer is mainly polyaluminum chloride liquid flocculant, the middle layer is mainly polyaluminum chloride silicate liquid flocculant, and the lower layer is acid insoluble impurities.

[0028] The Al of the calcium aluminate powder of the present ...

Embodiment 3

[0030] A method for preparing polyaluminum chloride flocculant and polyaluminum chlorosilicate flocculant at the same time. Take a dry and clean 3000ml beaker, add 400g of calcium aluminate powder and 2000g of distilled water into the beaker, mix them thoroughly, and stir for 15min to produce Suspension, slowly add 500g of silicon tetrachloride residue in the fume hood, when the temperature rises to 60°C, add 800g of distilled water, then control the temperature at 103-105°C, pH 2.5, and basicity 60 % under the condition of reaction for 6 hours, after the completion of the reaction, let it stand for 35 hours to ripen. After the ripening, the reaction system is divided into three layers. Impurities.

[0031] The Al of the calcium aluminate powder of the present embodiment 2 0 3 The content is 60%. The calcium aluminate powder contains 1% ferric oxide.

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Abstract

The invention aims at providing a preparation method of preparing a poly aluminum chloride flocculant and a poly aluminum silicate chloride flocculant simultaneously. The method comprises the steps of adding water into calcium aluminate powder for mixing to prepare a suspension, continuing mixing, adding appropriate amount of silicon tetrachloride or / and silicon tetrachloride raffinate, adding appropriate amount of water to completely hydrolyze silicon tetrachloride in the silicon tetrachloride raffinate, controlling the temperature of a reaction system at 85-105 DEG C for reaction for 4-6h, performing curing treatment after the reaction to layer liquid, and obtaining the poly aluminum chloride liquid flocculant and the poly aluminum silicate chloride liquid flocculant. The method takes the silicon tetrachloride raffinate generated in a polysilicon production process as a raw material for the first time, utilizes a specific technical sequence and technological parameters, makes full use of the silicon tetrachloride raffinate, promotes healthy development of a polysilicon enterprise, prepares the poly aluminum chloride flocculant and the poly aluminum silicate chloride flocculant simultaneously, and has excellent economic benefits.

Description

technical field [0001] The invention relates to the technical field of synthetic flocculants, in particular to a method for simultaneously preparing polyaluminum chloride flocculants and polyaluminum chloride silicate flocculants. Background technique [0002] Polyaluminum chloride is a new type of polymer flocculant developed in the late 1960s. It has excellent water purification performance. With the development of my country's economy, the amount of water treatment is increasing, and the shortcomings of the original water purification agent are becoming more and more prominent. There is an urgent need to develop new and efficient polyaluminum chloride flocculants. At present, it is gradually replacing aluminum sulfate and becoming one of the most widely used inorganic flocculants. Polyaluminum chloride is a highly efficient inorganic polymer flocculant in water treatment. The general chemical formula is to make fine suspension in water mainly through the mechanism of comp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52
CPCC02F1/5245
Inventor 王应红江滔夏烈文宋连香胡育苏泽模
Owner LESHAN NORMAL UNIV
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