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Method for synthesizing polymeric ferric sulphate

A technique of polymerizing ferric sulfate and its synthesis method, which is applied in the fields of ferric sulfate, flocculation/precipitation water/sewage treatment, etc. It can solve the problems of high cost and large amount of hydrogen peroxide, and achieve the effects of low cost, pollution avoidance and convenient operation

Inactive Publication Date: 2008-08-27
李绍通
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

CN1052293 uses hydrogen peroxide as a catalytic oxidant to oxidize and synthesize polyferric sulfate. The amount of hydrogen peroxide is large and the cost is high

Method used

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  • Method for synthesizing polymeric ferric sulphate

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Effect test

Embodiment 1

[0031] 2000 kilograms of solid industrial ferrous sulfate, 1000 kilograms of 20% sulfuric acid are added in the acid-resistant enamel reactor (3) from (11), and the speed control of stirring is 130 rev / min. Heating up, adding 100 kilograms of acid ferric nitrate in (1), feeding air from (8), the catalytic oxidation polymerization reaction is carried out in the temperature range of 75-105 ℃, and the reaction time is controlled at 2 hours, and the product that generates is deep Brown viscous polyferric sulfate.

Embodiment 2

[0033] 1900 kilograms of solid industrial ferrous sulfate, 1000 kilograms containing 18% ferrous sulfate 20% titanium white sulfate waste acid (11) are added in the acid-resistant enamel reactor (3), and the speed control of stirring is 130 revs / min. Heating up, adding 300 kilograms of acid ferric nitrate in (1), feeding air from (8), the catalytic oxidation polymerization reaction is carried out in the temperature range of 75-105 ℃, and the reaction time is controlled at 2 hours, and the product that generates is deep Brown viscous polyferric sulfate.

[0034] The nitric oxide produced by the reaction kettle (3) is oxidized into nitrogen dioxide by the blown air or oxygen-enriched air in the oxidation packing tower (4) on the top of the reaction kettle, and the generated nitrogen dioxide is mixed with the reaction kettle circulation pump (2) The conveyed material continues to react. The nitric oxide carried by the air in the discharge pipe enters the tail gas absorption pack...

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Abstract

The invention discloses a method for synthesizing polymeric ferric sulfate, which employs air, oxygen or oxygen-enriched air as an oxidizing agent, uses ferric persulfate, sulfuric acid or waste acid of titanium white by sulfuric acid process raw materials, using acid nitric ferric sulfate as an accelerating agent and synthesizing the polymeric ferric sulfate in an enamel autoclave which is provided with a packed tower, finally, using ferric persulfate to process the oxidation off-gas. The invention has the advantages of low energy consumption, low cost and convenient operation, not only effectively utilizing the industrial waste acid and the industrial waste slag, but also avoiding polluting to the environment.

Description

technical field [0001] The invention relates to a method for polymerizing ferric sulfate as an inorganic macromolecule flocculant for treating drinking water, waste water or sewage, in particular to a method for preparing polymerized ferric sulfate by using industrial titanium white waste acid. Background of the invention [0002] Polymerized ferric sulfate is an inorganic polymer flocculant, which has a significant removal effect on certain heavy metal ions in sewage and COD, BOD, SS, chroma, odor, emulsified oil, etc. It is suitable for industrial water, drinking water, etc. Water is also an inexpensive and excellent purifier. Because it is non-toxic and harmless to the human body, it has great advantages compared with aluminum salt flocculants, and is an excellent sewage purifying agent. [0003] When titanium dioxide is produced by sulfuric acid method using ilmenite as raw material, about 8 tons of waste acid and about 4 tons of waste paraferrous sulfate will be discha...

Claims

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Application Information

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IPC IPC(8): C01G49/14C02F1/52
Inventor 李绍通
Owner 李绍通
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