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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 process of energy application, etc., can solve the problems of high application cost and long reaction time, It achieves the effects of wide application, fast settling speed of flocs and stable properties of reactants

Inactive Publication Date: 2015-02-04
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 existing water treatment technology in the preparation of polyphosphorus aluminum iron chloride flocculant, such as long reaction time and high application cost. The preparation method of aluminum iron flocculant

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 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 Put the aqueous solution in a container, stir for 3min, then add 2mol / L Na 2 HPO 4 2H 2 O aqueous solution, adjust the molar ratio P / (Al+Fe) of phosphorus to aluminum and iron to be 0.2, continue to stir for 10min to make it mix evenly;

[0021] (2) Place the container in a microwave reactor, turn on the microwave, and rapidly raise the temperature to a reaction temperature of 60°C under 100W microwave radiation conditions, 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 4mL of 2mol / L NaOH solution in a water bath at 50°C to adjust the degree of alkalinity, and continue the reaction for 4h;

[0023] (4) After the reaction is completed, mature the product at room temperature for 8 hours;...

Embodiment 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 Put the aqueous solution in a container, stir for 3min, then add 2mol / L Na 2 HPO 4 2H 2 O aqueous solution, adjust the molar ratio P / (Al+Fe) of phosphorus to aluminum and iron to be 0.3, continue to stir for 10min to make it mix evenly;

[0027] (2) Place the container in a microwave reactor, turn on the microwave, and rapidly raise the temperature to a reaction temperature of 60°C under 100W microwave radiation conditions, 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 in a water bath at 60°C to adjust the degree of alkalinity, and continue the reaction for 4h;

[0029] (4) After the reaction is completed, mature the product at room temperature for 10 hour...

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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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Patent Type & Authority Patents(China)
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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