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Rapid synthesis technology for poly-ferric sulfate aluminum

A technology of polyferric aluminum sulfate and polyferric aluminum sulfate, which is applied in the fields of ferric sulfate, chemical recovery, flocculation/sedimentation water/sewage treatment, etc., can solve problems such as nitrite residue, achieve elimination of nitrite, and good development prospects , the effect of improving quality

Active Publication Date: 2015-11-11
SHANDONG SANFENG GROUP
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Problems solved by technology

Moreover, using sodium nitrite as a catalyst still has hidden dangers of nitrite residues

Method used

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  • Rapid synthesis technology for poly-ferric sulfate aluminum

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 1) Add 54% of ferrous sulfate heptahydrate, 2.9% of soluble aluminum hydroxide, 9.6% of sulfuric acid, and 33.5% of water into the reactor according to the mass percentage, and the acid solubility of soluble aluminum hydroxide is 94.5%;

[0024] 2) Add 1.0‰ manganese dioxide with the mass of ferrous sulfate heptahydrate to the reactor through the metering screw conveyor as a catalyst, and spray liquid oxygen into the reactor at the same time to start the oxidation reaction, and the initial pressure of liquid oxygen injection at the beginning of the oxidation reaction At 0.34MPa, adjust the liquid oxygen injection pressure to 0.25MPa after 10 minutes of reaction, and control the reaction temperature at 50°C during the process;

[0025] 3) The oxidation reaction inside the reactor spontaneously proceeds with hydrolysis and polymerization. After the reaction is carried out for 30 minutes, the material is spray-dried to obtain polyferric aluminum sulfate, and the manganese d...

Embodiment 2

[0027] 1) According to mass percentage, 56% of ferrous sulfate heptahydrate, 1% of soluble aluminum hydroxide, 9.5% of sulfuric acid, and 33.5% of water are added to the reactor, and the acid solubility of soluble aluminum hydroxide is 94.5%;

[0028] 2) Add 1.2‰ manganese dioxide with the mass of ferrous sulfate heptahydrate to the reactor through the metering screw conveyor as a catalyst, and spray liquid oxygen into the reactor at the same time to start the oxidation reaction, and the initial pressure of liquid oxygen injection at the beginning of the oxidation reaction At 0.35MPa, adjust the liquid oxygen injection pressure to 0.26MPa after 10 minutes of reaction, and control the reaction temperature at 48°C during the process;

[0029] 3) The oxidation reaction inside the reactor spontaneously proceeds with hydrolysis and polymerization. After 33 minutes of reaction, the material is spray-dried to obtain polyferric aluminum sulfate, and the manganese dioxide catalyst is re...

Embodiment 3

[0031] 1) According to mass percentage, 51.9% of ferrous sulfate heptahydrate, 5% of soluble aluminum hydroxide, 9.6% of sulfuric acid, and 33.5% of water are added to the reactor, and the acid solubility of soluble aluminum hydroxide is 94.5%;

[0032] 2) Add 0.9‰ manganese dioxide with the mass of ferrous sulfate heptahydrate to the reactor through the metering screw conveyor as a catalyst, and spray liquid oxygen into the reactor at the same time to start the oxidation reaction, and the initial pressure of liquid oxygen injection at the beginning of the oxidation reaction At 0.32MPa, adjust the liquid oxygen injection pressure to 0.28MPa after 10 minutes of reaction, and control the reaction temperature at 52°C during the process;

[0033]3) The oxidation reaction inside the reactor spontaneously proceeds with hydrolysis and polymerization. After 32 minutes of reaction, the material is spray-dried to obtain polyferric aluminum sulfate, and the manganese dioxide catalyst is r...

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Abstract

The invention relates to a rapid synthesis technology for poly-ferric sulfate aluminum and belongs to the technical field of water treatment flocculating agents. The rapid synthesis technology is characterized by comprising the specific preparation steps that materials of, by mass, 51.9%-56% of iron vitriol, 1%-5% of dissolvable aluminum hydroxide, 9.3%-9.6% of sulfuric acid and 33.5% of water are added in a reactor; a manganese dioxide catalyst is added in the reactor, and liquid oxygen is sprayed into the reactor at the same time; in the process, the reaction temperature is controlled to range from 45 DEG C to 55 DEG C; hydrolysis and polymerization reactions are automatically carried out while the oxidation reaction is carried out in the reactor, spray drying is carried out on the materials after the reactions are carried out for 30 min-40 min, the poly-ferric sulfate aluminum is obtained, and the manganese dioxide catalyst is recycled. The technology is simple in generation technology, the production period is greatly shortened, the production cost is reduced, harmful residues in the product are eliminated, and the product is nonpoisonous and harmless.

Description

technical field [0001] A rapid synthesis process of polyferric aluminum sulfate belongs to the technical field of water treatment flocculants. Background technique [0002] Polyferric aluminum sulfate (PFAS) is a new type of high-efficiency water treatment agent developed on the basis of polyferric sulfate (PFS) and combining the advantages of PFS. It can be widely used in various wastewater, industrial water and drinking water coagulation sedimentation treatment. In our country, sulfuric acid method is widely used in the production of titanium dioxide. During the production process, the output of by-product ferrous sulfate heptahydrate far exceeds the output of titanium dioxide itself. It is an important way to comprehensively utilize ferrous sulfate heptahydrate, a by-product of titanium dioxide, to use ferrous sulfate, titanium white waste acid and soluble aluminum hydroxide to synthesize PFAS, and then use it in wastewater treatment to turn waste into treasure. In the ...

Claims

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Application Information

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IPC IPC(8): C02F1/52C01G49/14
CPCY02P20/584
Inventor 王开宝路庆超王文泽
Owner SHANDONG SANFENG GROUP
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