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Method for producing solid poly ferric sulfate

A technology of solid polymerization and ferric sulfate, which is applied in the fields of ferric sulfate, flocculation/precipitation water/sewage treatment, etc. It can solve the problems of low basicity of products, poor flocculation effect, complicated process conditions, etc., and achieve simple operation process and high production efficiency. Inexpensive and versatile effects

Active Publication Date: 2012-10-10
HENAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, there are two routes for the solidification of polyferric sulfate: the first is to generate a liquid first, and then spray drying or concentration under reduced pressure to obtain a solid. This type of method has complex production equipment and large energy consumption; the second is the dehydration oxidation method involved in the patent document CN1105342. The obtained product has low basicity, complex process conditions and poor flocculation effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Weigh 800 Kg industrial ferrous sulfate (FeSO 4 ·7H 2 O), put it into an acid-resistant reaction kettle, and heat it to 80±5 o C, electric stirring until muddy, then spray 80 Kg of concentrated sulfuric acid with a mass concentration of 98% and 160 Kg of hydrogen peroxide with a mass concentration of 50% in the reaction kettle, fully stir the reaction for 1 hour after adding, add industrial grade ammonium salt amino Sodium 1 Kg, ammonium bicarbonate 2 Kg and ammonium chloride 13 Kg, after stirring evenly, the product is all moved to a condensation tank, cooled, and left to stand for 8 hours to obtain powdery solid polyferric sulfate.

Embodiment 2

[0012] Weigh 800 Kg industrial ferrous sulfate (FeSO 4 ·7H 2 O), put it into an acid-resistant reactor and heat it to 130±5 o C, electric stirring until muddy, then spraying 104 Kg of concentrated sulfuric acid with a mass concentration of 98% and 240 Kg of hydrogen peroxide with a mass concentration of 50% in the reaction kettle, fully stirred and reacted for 4 hours after the addition, and added industrial-grade ammonium salt amino Sodium 3 Kg, ammonium bicarbonate 8 Kg and ammonium chloride 37 Kg, after stirring evenly, the product is all moved to a condensation tank, cooled, and left to stand for 36 hours to obtain powdery solid polyferric sulfate.

Embodiment 3

[0014] Weigh 800 Kg industrial ferrous sulfate (FeSO 4 ·7H 2 O), put it into an acid-resistant reaction kettle, and heat it to 100±5 o C, electric stirring until muddy, and then spraying 95 Kg of concentrated sulfuric acid with a mass concentration of 98% and 200 Kg of hydrogen peroxide with a mass concentration of 50% in the reaction kettle, fully stirred and reacted for 2 hours after the addition, and added industrial-grade ammonium salt amino Sodium 1 Kg, ammonium bicarbonate 8 Kg and ammonium chloride 14 Kg, after stirring evenly, the product is all moved to a condensation tank, cooled, and left to stand for 12 hours to obtain powdery solid polyferric sulfate.

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Abstract

The invention relates to a method for producing solid poly ferric sulfate. The key point of the technical scheme of the invention is as follows: the method for producing solid poly ferric sulfate comprises the following steps: weighing 100 parts by weight of industrial ferrous sulfate (FeSO4.7H2O), adding into an acidproof reaction kettle, heating to 80-130 DEG C, and electrically stirring to become slurry; respectively adding 10-13 parts by weight of 98% (mass concentration) concentrated sulfuric acid and 20-30 parts by weight of 50% (mass concentration) oxydol in a spraying mode, and stirring to react for 1-4 hours; and adding 2-6 parts by weight of industrial ammonium salt, uniformly stirring, then transferring all the products to a condensing tank, cooling, and standing for 8-36 hours to obtain powdery solid poly ferric sulfate. The invention has the advantages of low production cost, low energy consumption, simple operation procedure, low equipment cost and the like. The produced solid poly ferric sulfate conforms to the requirements of national standard (GB14591-2006 Water treatment chemical-Poly ferric sulfate) and can be widely used. The solid poly ferric sulfate can be used for purifying both sewage and drinking water.

Description

technical field [0001] The invention relates to a method for producing flocculant, in particular to a production method for directly synthesizing solid polyferric sulfate with ferrous sulfate and sulfuric acid without drying. Background technique [0002] Chemical treatment is a very important unit in water supply and sewage treatment, in which flocculant is a chemical agent that can be used to effectively separate fine suspended particles that cause water pollution. At present, the main varieties of flocculants are still iron salts and aluminum salts. my country began to develop inorganic polymer flocculant polyferric sulfate from the early 1980s. [0003] Due to the inconvenient storage and difficult transportation of liquid polyferric sulfate, its popularization and application are largely restricted. Therefore, the research and development of solid polyferric sulfate has become the focus of attention. Solid polyferric sulfate has the advantages of fast hydrolys...

Claims

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Application Information

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IPC IPC(8): C01G49/14C02F1/52
Inventor 陈得军刘玉民裴渊超王爱军
Owner HENAN NORMAL UNIV
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