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PAFC (polyamuminum ferric chloride) liquid product and preparation method thereof

A technology of polyaluminum ferric chloride and liquid products, which is applied in chemical instruments and methods, cobalt halides, inorganic chemistry, etc., can solve the problems of slow speed, sodium hydroxide concentration, aluminum hydroxide precipitation, low efficiency, etc., and achieve shortening. Time-consuming, energy saving, high salinity effect

Active Publication Date: 2017-02-15
新疆澄润环保科技有限公司
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AI Technical Summary

Problems solved by technology

[0003] The prior art can be prepared by a variety of methods. In the preparation process of polyaluminum ferric chloride synthesized by the copolymerization method, sodium hydroxide solution needs to be added to adjust the pH, but in the existing process, the local sodium hydroxide concentration is too high and the Aluminum hydroxide precipitates
In order to solve this problem, sodium hydroxide is usually slowly added dropwise or slowly through a capillary. This method is slow and inefficient, and the concentration of aluminum chloride and ferric chloride solution used must be lower than 2mol / L. The polyaluminum ferric chloride solution has a low concentration, and as a liquid product, it cannot meet higher usage requirements

Method used

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preparation example Construction

[0027] In the preparation method of the polyaluminum ferric chloride liquid product of the present invention, while stirring, the sodium hydroxide solution is added into the mixed solution of aluminum chloride and ferric chloride in the form of spraying, which can effectively avoid the occurrence of precipitation caused by excessive local pH, greatly improving The time required for preparing the polyaluminum ferric chloride liquid product is shortened, and at the same time, a higher concentration of reaction raw materials can be used to prepare a high-concentration polyaluminum ferric chloride liquid product, which can save a lot of energy for the subsequent drying process.

[0028] Preferably, the preparation method of described aluminum chloride and ferric chloride mixed solution comprises:

[0029] Aluminum chloride and ferric chloride are mixed and stirred to be dissolved in a solvent to obtain a mixed solution of aluminum chloride and ferric chloride;

[0030] Or aluminum...

Embodiment 1

[0052] A preparation method of polyaluminum ferric chloride liquid product, comprising the steps of:

[0053] Analytical pure aluminum chloride is mixed with the aluminum chloride aqueous solution that concentration is 2mol / L, and analytical pure ferric chloride hexahydrate is mixed with the ferric chloride aqueous solution that concentration is 2mol / L for subsequent use;

[0054] The sodium hydroxide aqueous solution that concentration is 4mol / L is mixed with analytically pure sodium hydroxide;

[0055] Take 100mL of the above-mentioned aluminum chloride aqueous solution and ferric chloride aqueous solution and add them to a 1500mL beaker, stir for 1 minute at a stirring rate of 600r / min with a high-speed disperser to make them fully mixed;

[0056] Then adjust the stirring rate of the high-speed disperser to 1000r / min, turn on the sprayer and continuously spray 100mL of sodium hydroxide aqueous solution, and continue stirring for 20 minutes to obtain the polyaluminum ferric ...

Embodiment 2

[0058] A preparation method of polyaluminum ferric chloride liquid product, comprising the steps of:

[0059] Analytical pure aluminum chloride is mixed with the aluminum chloride aqueous solution that concentration is 4mol / L, and analytical pure ferric chloride hexahydrate is mixed with the ferric chloride aqueous solution that concentration is 4mol / L for subsequent use;

[0060] The sodium hydroxide aqueous solution that concentration is 4mol / L is mixed with analytically pure sodium hydroxide;

[0061] Take 100mL of the above aluminum chloride aqueous solution and ferric chloride aqueous solution and add them to a 1500mL beaker, stir with a high-speed disperser at a stirring rate of 800r / min for 3 minutes to make them fully mixed;

[0062] Then adjust the stirring rate of the high-speed disperser to 1200r / min, turn on the sprayer and continuously spray 210mL of sodium hydroxide aqueous solution, and continue stirring for 30 minutes to obtain the polyaluminum ferric chloride ...

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Abstract

The invention provides a PAFC (polyamuminum ferric chloride) liquid product and a preparation method thereof. According to the preparation method of the PAFC liquid product, during stirring, a sodium hydroxide solution is added to an aluminum chloride and ferric chloride mixed solution in a spray form, precipitate caused by excessive high local pH can be effectively avoided, the time required for preparation of the PAFC liquid product is greatly shortened, meanwhile, the PAFC liquid product with high concentration can be prepared from reaction raw materials with higher concentration, and a large amount of energy can be saved for the following drying procedure. The PAFC liquid product has higher concentration and higher basicity than those of conventional PAFC liquid products in the prior art and can meet higher use requirements as a liquid product, and a large amount of energy can be saved for the following drying procedure in production of solid products.

Description

technical field [0001] The invention relates to the technical field of compound synthesis methods, in particular to a polyaluminum ferric chloride liquid product and a preparation method thereof. Background technique [0002] Polyaluminum ferric chloride (PAFC, [Al 2 (OH) n ·CL 6-n ] m ·[Fe 2 (OH) x ·CL 6-x ] y ) is an inorganic polymer coagulant formed by the coagulation and hydrolysis of aluminum salt and iron salt. Its hydrolysis speed is fast and its hydration is weak. It integrates the respective advantages of aluminum salt and iron salt, significantly improves the morphology of aluminum ions and iron ions, and greatly improves the degree of polymerization. Take advantage of aluminum and iron coagulants for air flotation operation to improve the coagulation performance of polyaluminum chloride; the purification treatment effect on high turbidity water and low temperature and low turbidity water is particularly obvious, and it is not necessary to add alkaline add...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G51/08C02F1/52
CPCC01G51/085C02F1/5245
Inventor 苏高申
Owner 新疆澄润环保科技有限公司
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