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Method for producing polymeric ferric sulfate from raw materials industrial waste acid and scrap iron

A technology for polymerizing ferric sulfate and industrial waste acid, which is applied in chemical instruments and methods, water/sewage treatment, flocculation/sedimentation water/sewage treatment, etc. It can solve the problems of production process pollution and low yield

Inactive Publication Date: 2016-09-21
哈尔滨云水工大环保科技股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing production method of polyferric sulfate has a low yield, which is easy to cause serious pollution problems in the production process.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A method for producing polyferric sulfate with industrial waste acid and scrap iron as raw material, the method may further comprise the steps:

[0021] (1) Reacting waste acid and waste iron as raw materials to obtain ferrous iron;

[0022] Take waste sulfuric acid and waste iron barrels (mainly composed of Fe 2 o 3 , FeO and a large amount of Fe) as raw materials, scrap iron barrels are crushed and passed through an 80-mesh sieve to make scrap iron sludge powder to facilitate the reaction with waste acid;

[0023] Put the scrap iron powder, 2 times the weight of water and 2.5 times the weight of 50% waste sulfuric acid into the soaking tank, stir well, soak, and stir once every half an hour to get a ferrous iron solution, including ferrous sulfate and ferric sulfate , the main reaction is:

[0024] FeO + H 2 SO 4 = FeSO 4 + H 2 O(1)

[0025] Fe + H 2 SO 4 = FeSO 4 + H 2 (2)

[0026] Fe 2 o 3 + 3H 2 SO 4 = Fe 2 (SO 4 ) 3 + 3H 2 O (3)

[00...

Embodiment 2

[0042] A kind of described take industrial waste acid and scrap iron as the method for raw material production polyferric sulfate, this method comprises the steps:

[0043] (1) reacting waste acid and waste iron as raw materials to obtain ferrous iron;

[0044] Put the scrap iron powder, water of the same weight and 50% waste sulfuric acid of 2 times the weight into the soaking tank, stir well, soak, and stir once every half an hour to obtain a ferrous iron solution, including ferrous sulfate and ferric sulfate;

[0045] (2) Carry out oxidation reaction with potassium chlorate as oxidant to obtain ferric iron;

[0046] Under the condition that the temperature is 60° C., the oxidizing agent potassium chlorate is added to the obtained ferrous solution, the substance ratio of potassium chlorate and ferrous iron is 0.3, and the reaction time is 2 hours to obtain a ferric solution;

[0047] (3) carry out hydrolysis reaction;

[0048] Continuously feed water vapor into the obtaine...

Embodiment 3

[0055] A kind of described take industrial waste acid and scrap iron as the method for raw material production polyferric sulfate, the method comprises the steps:

[0056] (1) Reacting waste acid and waste iron as raw materials to obtain ferrous iron;

[0057] Put the scrap iron powder, 2.5 times the weight of water and 2 times the weight of 50% waste sulfuric acid into the soaking tank, stir well, soak, and stir once every half an hour to obtain a ferrous iron solution, including ferrous sulfate and ferric sulfate ;

[0058] (2) Carry out oxidation reaction with potassium chlorate as oxidant to obtain ferric iron;

[0059] Under the condition that the temperature is 40° C., an oxidizing agent potassium chlorate is added to the obtained ferrous solution, the substance ratio of potassium chlorate and ferrous iron is 0.2, and the reaction time is 3 hours to obtain a ferric solution;

[0060] (3) carry out hydrolysis reaction;

[0061] Continuously feed water vapor into the ob...

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PUM

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Abstract

The invention discloses a method for producing polymeric ferric sulfate from raw materials industrial waste acid and scrap iron. The polymeric ferric sulfate is a novel inorganic sewage flocculant, is an iron inorganic polymeric flocculant, is high in flocculation force and sedimentation velocity, and has remarkable removal effects on some heavy metal irons, COD (chemical oxygen demand), chromaticity, stink and the like during sewage treatment. An existing polymeric ferric sulfate production method is low in yield and serious in pollution during the production process. The method comprises the following steps: (1) reacting the raw materials, i.e. the waste acid and the scrap iron, to obtain ferrous iron; (2) performing oxidization reaction to obtain ferric iron by adopting potassium chlorate as an oxidant; (3) performing hydrolysis reaction; (4) carrying out a polymerization process of conversion from a low polymer to a high polymer to obtain the polymeric ferric sulfate. By the method, the polymeric ferric sulfate is produced from the raw materials, i.e. the industrial waste acid and the scrap iron.

Description

Technical field: [0001] The invention relates to a method for producing polyferric sulfate by using industrial waste acid and waste iron as raw materials. Background technique: [0002] Polyferric sulfate is a new type of inorganic sewage flocculant, which is an iron-based inorganic polymer flocculant. It has high flocculation ability and fast settling speed, and has remarkable removal effect on certain heavy metal ions, COD, chroma, and odor during sewage treatment. In addition, polyferric sulfate also has the advantages of wide pH trial range and low corrosion to equipment. After treatment with polyferric sulfate, the water quality is excellent, non-toxic, and the treatment cost is lower than similar flocculants such as ferric chloride, aluminum sulfate, polyaluminum chloride and other iron salts. However, the existing production method of polyferric sulfate has a low yield, which easily causes serious pollution in the production process. Invention content: [0003] T...

Claims

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Application Information

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IPC IPC(8): C02F1/52
CPCC02F1/5245
Inventor 冯树元赵佳英毛士良张瑞林孟祥娟孙竞妍于文海李淑梅杨炳东
Owner 哈尔滨云水工大环保科技股份有限公司
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