Preparation method and application of polymeric phosphato aluminum iron chloride coagulant

A technology of polyaluminum chloride and polyaluminum chloride, which is applied in the direction of flocculation/precipitation water/sewage treatment, chemical/physical/physicochemical processes of energy application, etc., and can solve the problems of high application cost and long reaction time, etc. It achieves the effect of wide application, fast floc settlement speed and fast temperature rise

Inactive Publication Date: 2013-07-10
HUNAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] One of the objectives of the present invention is to provide a polyphosphorus chloride with short synthesis time, stable performance and good water treatment effect in view of the shortcomings of the exi

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0019] Example 1:

[0020] (1) At room temperature, take 6 parts by volume of 2mol / L PAC (polyaluminum chloride) aqueous solution and 4 parts by volume of 2mol / L FeCl 3 Place the aqueous solution in a container, stir for 3 minutes, and then add 2mol / L Na 2 HPO 4 ·2H 2 O aqueous solution, adjust the molar ratio of phosphorus to aluminum and iron P / (Al+Fe) to 0.2, and continue to stir for 10 minutes to make it uniform;

[0021] (2) Place the container in a microwave reactor, turn on the microwave, and rapidly increase the temperature to the reaction temperature of 60°C under the condition of 100W microwave radiation, then reduce the microwave power to 40W, and control the reaction temperature at 60°C for 8 minutes of polymerization;

[0022] (3) After taking the container out of the microwave reactor, add 4mL2mol / L NaOH solution under 50℃ water bath to adjust the alkalinity, and continue the reaction for 4h;

[0023] (4) After the reaction is completed, the product is matured at room tem...

Example Embodiment

[0025] Example 2:

[0026] (1) At room temperature, take 5 parts by volume of 2mol / L PAC (polyaluminum chloride) aqueous solution and 4 parts by volume of 3mol / L FeCl 3 Place the aqueous solution in a container, stir for 3 minutes, and then add 2mol / L Na 2 HPO 4 ·2H 2 O aqueous solution, adjust the molar ratio of phosphorus to aluminum and iron P / (Al+Fe) to 0.3, and continue to stir for 10 minutes to make the mixture uniform;

[0027] (2) Place the container in a microwave reactor, turn on the microwave, and rapidly increase the temperature to the reaction temperature of 60°C under 100W microwave radiation, then reduce the microwave power to 40W, and control the reaction temperature at 50°C for 10 minutes of polymerization;

[0028] (3) After taking the container out of the microwave reactor, add 4mL of 2mol / L NaOH solution to adjust the alkalinity under the condition of 60℃ water bath, and continue the reaction for 4h;

[0029] (4) After the reaction is completed, the product is matur...

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PUM

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Abstract

The invention discloses a preparation method and application of a polymeric phosphato aluminum iron chloride coagulant under a micro-wave irradiation condition. The method comprises the steps of: based on aluminum polychloride and FeCl3.6H2O as main materials, adding water to dissolve and evenly mixing; then adding disodium hydrogen phosphate solution to adjust the molar ratio of phosphorus to ferro-aluminum; putting into a microwave reactor to radiate and heat, so as to polymerize under a microwave condition; taking out from the microwave reactor; adding NaOH solution to adjust the alkalization degree and continuing to react for a period of time under the condition of a water bath; and finally curing at normal temperature to obtain polymeric phosphato aluminum iron chloride. The prepared polymeric phosphato aluminum iron chloride coagulant can be widely applied to treatment of source water, and treatment of industrial wastewater and domestic wastewater; and the function is superior to that of common aluminum polychloride and ferric polychloride. The polymeric phosphato aluminum iron chloride disclosed by the invention can effectively reduce the turbidity and UV254 of a water body in feedwater treatment; and the polymeric phosphato aluminum chloride iron disclosed by the invention has good removal effect on the turbidity, chemical oxygen demand (COD) and total phosphorus in domestic wastewater and industrial wastewater.

Description

technical field [0001] The invention belongs to the technical field of chemical engineering and environmental protection engineering, and in particular relates to the preparation and application of a polyphosphorus aluminum chloride ferric flocculant under the condition of microwave radiation. Background technique [0002] In the field of water treatment technology, flocculation is one of the most important treatment steps. It has the advantages of simple process, low treatment cost and good treatment effect, and is widely used in water treatment. [0003] Polyaluminum ferric chloride is a high-efficiency inorganic polymer flocculant developed in recent years. Because it has the advantages of polyaluminum chloride and polyferric chloride at the same time, and it is used in water treatment, the water color The chroma is much lower than that after treatment with polyferric chloride and polyferric sulfate, and the residual amount of aluminum is lower than that after treatment w...

Claims

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Application Information

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IPC IPC(8): B01J19/12C02F1/52
Inventor 张鹏任伯帜郑谐刘科家杨旭明安越
Owner HUNAN UNIV OF SCI & TECH
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