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Method utilizing waste sulfuric acid and ferrous sulfate to produce polymeric ferric sulfate through oxygen pressurizing

A technology for polymerizing ferric sulfate and ferrous sulfate, applied in the direction of ferric sulfate, can solve the problems of consuming mineral resources and sulfuric acid resources, uneconomical, and environmentally friendly

Active Publication Date: 2014-10-01
GUANGXI PINGGUO FENGHUA TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Both of the above two processes need to use iron and commercial grade sulfuric acid as raw materials, which consume a large amount of mineral resources and sulfuric acid resources, which is neither economical nor environmentally friendly

Method used

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  • Method utilizing waste sulfuric acid and ferrous sulfate to produce polymeric ferric sulfate through oxygen pressurizing
  • Method utilizing waste sulfuric acid and ferrous sulfate to produce polymeric ferric sulfate through oxygen pressurizing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Utilize waste sulfuric acid and ferrous sulfate oxygen pressurization to produce the method for polyferric sulfate, comprise the following steps:

[0029] ⑴Acid mixed and dissolved

[0030] Extract 9 tons of waste sulfuric acid containing 3% iron and 20% sulfuric acid from the acid storage tank with a material pump 2, add it to the dissolving tank 1 with a stirrer, the stirring speed is controlled at 45r / min, and add 13 tons of waste sulfuric acid containing The ferrous sulfate heptahydrate with 18% iron has a mixing and dissolving temperature of 70° C. and a mixing and dissolving time of 20 minutes. After the ferrous sulfate heptahydrate is completely mixed and dissolved in the waste sulfuric acid solution, the end point of the reaction is achieved by stirring evenly.

[0031] ⑵ Catalytic Oxidative Polymerization

[0032] After the acid mixed dissolution reaction reaches the end point, keep the stirring speed at 45r / min, and use the suction pump 2 to pump the mixed an...

Embodiment 2

[0036] A kind of method utilizing waste sulfuric acid and ferrous sulfate oxygen pressure to produce polyferric sulfate, comprises the following steps:

[0037] ⑴Acid mixed and dissolved

[0038] Extract 9 tons of iron-containing 3%; sulfuric acid 20% iron waste sulfuric acid from the acid storage tank with the pump 2, add in the dissolving tank 1 with a stirrer, control the stirring speed at 44r / min, add 13 tons while stirring Ferrous sulfate heptahydrate containing 18% iron, after ferrous sulfate heptahydrate is completely mixed and dissolved in the waste sulfuric acid solution, the acid dissolution temperature is 50°C, the time is 25 minutes, and the reaction end point is achieved by stirring evenly.

[0039] ⑵ Catalytic Oxidative Polymerization

[0040] After the acid mixed dissolution reaction reaches the end point, keep the stirring speed at 44r / min, use the pump 2 to pump the mixed and dissolved material in the dissolution tank 1 to the circulation reaction tower 8, ad...

Embodiment 3

[0044] A kind of method utilizing waste sulfuric acid and ferrous sulfate oxygen pressure to produce polyferric sulfate, comprises the following steps:

[0045] ⑴Acid mixed and dissolved

[0046] Extract 9 tons of iron-containing 3%; sulfuric acid 20% iron waste sulfuric acid from the acid storage tank with the material pump 2, add in the dissolution tank 1 with a stirrer, control the stirring speed at 46r / min, add 13 tons while stirring The ferrous sulfate heptahydrate containing 18% iron is completely mixed and dissolved in the waste sulfuric acid solution, the mixing and dissolving temperature is 30°C, the mixing and dissolving time is 30 minutes, and the reaction end point is achieved by stirring evenly.

[0047] ⑵ Catalytic Oxidative Polymerization

[0048] After the acid mixed dissolution reaction reaches the end point, keep the stirring speed controlled at 46r / min, use the pump 2 to pump the mixed and dissolved material in the dissolution tank to the circulation reacti...

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Abstract

A method utilizing waste sulfuric acid and ferrous sulfate to produce polymeric ferric sulfate through oxygen pressurizing comprises the following steps: taking titanium white waste sulfuric acid and iron vitriol as main raw materials, adding a small amount of sodium nitrite as a catalyst, and reacting for 2-4 hours under the conditions of pumping in oxygen and pressurizing to obtain a polymeric ferric sulfate liquid product. The liquid product is dried to obtain a solid powdery polymeric ferric sulfate product. According to the invention, titanium white waste sulfuric acid and the byproduct iron vitriol are subjected to comprehensive treatment to treat wastes with processes of wastes against one another and change waste into valuable, so that comprehensive recycling of two major pollution sources of waste acid and iron vitriol for titanium white manufacturers is realized.

Description

technical field [0001] The invention relates to the technical field of comprehensive utilization of industrial waste liquid and residue and chemical production, in particular to a method for pressurizing waste sulfuric acid and ferrous sulfate with oxygen to produce polyferric sulfate. Background technique [0002] Polyferric sulfate is an important inorganic polymer compound. After hydrolysis, it can produce a variety of high-priced multi-nuclear complex ions, which combine with the negative charges of the sol and suspended matter in the raw water to promote the formation of coarse flocs and sedimentation of colloidal particles and suspended matter in the water. , thereby purifying the water. Therefore, it is widely used as a treatment agent for domestic and industrial water, industrial and urban sewage. [0003] There are mainly two kinds of existing polymerized ferric sulfate production processes: one is to make ferrous sulfate with iron filings and commercial grade sulf...

Claims

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Application Information

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IPC IPC(8): C01G49/14
Inventor 陆锋黄政瑛银连江
Owner GUANGXI PINGGUO FENGHUA TECH
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