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Preparation method and application of polymeric phosphorus ferric aluminum sulfate flocculating agent

A technology of polyaluminum ferric sulfate and polyaluminum sulfate is applied in flocculation/precipitation water/sewage treatment, chemical/physics/physicochemical processes of energy application, etc., which can solve the problems of high application cost and long reaction time, and achieve Wide range of uses, fast floc settling speed, and the effect of promoting polymerization

Inactive Publication Date: 2014-11-19
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 short synthesis time, stable performance and good water treatment effect for the preparation of aluminum polyphosphate aluminum sulfate flocculant shortcomings such as long reaction time and high application cost in the existing water treatment technology Preparation method of iron flocculant

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) At room temperature, take 5 parts by volume of 2mol / L PAS aqueous solution and 5 parts by volume of 2mol / L FeSO 4 Put the aqueous solution in a container, add 5mL concentrated nitric acid, stir for 4min, 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) Put the container in the microwave reactor, turn on the microwave, and let it react for 5 minutes under the condition of 40W microwave radiation;

[0022] (3) Take the container out of the microwave reactor, place it in a water bath at 50°C, add 5mL of 2mol / L NaOH solution, adjust the degree of alkalinity, and continue the reaction for 5h;

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

[0024] (5) The appearance of reddish-brown liquid with an alkalization degree of 0.38 was obtained.

Embodiment 2

[0026] (1) At room temperature, take 5 volume parts of 2mol / L PAS aqueous solution and 4 volume parts of 3mol / L FeSO 4 Put the aqueous solution in a container, add 10mL concentrated nitric acid, 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) Put the container in the microwave reactor, turn on the microwave, and let it react for 6 minutes under the condition of 40W microwave radiation;

[0028] (3) Take the container out of the microwave reactor, place it in a water bath at 45°C, and add 5mL of 2mol / L NaCO 3 solution, adjust the degree of alkalinity, and continue to react for 6h;

[0029] (4) After the reaction is completed, the product is matured at room temperature for 10 hours;

[0030] (5) The appearance is reddish-brown liquid, and the polyaluminum iron sulfate with alkalization degree is 0.31 is prepared.

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Abstract

The invention discloses a preparation method and an application of a polymeric phosphorus ferric aluminum sulfate flocculating agent. The preparation method comprises the following steps of: adding a certain amount of concentrated nitric acid to serve as an oxidant into polymeric aluminum sulfate and FeSO4.7H2O which serve as main raw materials, and then adding a disodium hydrogen phosphate solution to adjust the molar ratio of phosphorus to ferro-aluminum; putting the mixture into a microwave reactor for radiation and heating, and carrying out polymerization for 3-15 minutes; adding a NaOH or Na2CO3 solution under a water bath condition to adjust the degree of alkalization, and continuously reacting for a period of time; and finally, curing at normal temperature to obtain the polymeric phosphorus ferric aluminum sulfate. The polymeric phosphorus ferric aluminum sulfate can be widely used for treating source water, production wastewater and domestic sewage, and the function of the polymeric phosphorus ferric aluminum sulfate is superior to that of ordinary polymeric aluminum sulfate and polymeric ferric sulfate. During feed water treatment, the polymeric phosphorus ferric aluminum sulfate can effectively reduce the turbidity and UV254 of a water body; and when being used for treating the domestic sewage and industrial wastewater, the polymeric phosphorus ferric aluminum sulfate has a good effect of removing the turbidity, COD (chemical oxygen demand) and total phosphorus.

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 polyphosphorus aluminum iron sulfate flocculant under the condition of microwave radiation. Background technique [0002] Inorganic polymer flocculant is a new type of water treatment agent. Compared with conventional inorganic flocculants, it has the advantages of good treatment effect, fast floc settlement speed, large alum flower, and low treatment cost. It is more and more popular in water treatment. Environmentalists of all ages. [0003] Polyphosphorus aluminum ferric sulfate (PPFAS) is a new type of high-efficiency inorganic flocculant developed on the basis of polyphosphoric aluminum ferric sulfate (PFS). There is a certain synergistic effect between them, which affects the hydrolysis and polymerization process of aluminum ions and iron ions, improves the stability of pol...

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
Owner HUNAN UNIV OF SCI & TECH
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