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Method for preparing polymeric ferric sulfate

A technology for polymerizing ferric sulfate and sulfuric acid, which is applied in the fields of ferric sulfate, chemical instruments and methods, water/sewage treatment, etc., can solve the problem of low production efficiency of polymerized ferric sulfate, and achieve the effect of improving production efficiency

Active Publication Date: 2016-08-10
CHANGZHOU QINGLIU WATER TREATMENT AGENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the invention is to overcome the defect that the production efficiency of polyferric sulfate in the prior art is not high, and to provide a preparation method of polyferric sulfate

Method used

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  • Method for preparing polymeric ferric sulfate
  • Method for preparing polymeric ferric sulfate
  • Method for preparing polymeric ferric sulfate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] In the experimental kettle of 5L, add 2.4kg pickling waste liquid (wherein ferrous iron is with Fe 2+ The mass fraction is 5%, the acid is H 2 SO 4 The mass fraction is 5%), then add 0.12kg98% sulfuric acid, 1.48kg of titanium dioxide factory by-product ferrous sulfate (ferrous sulfate heptahydrate), add catalyst sodium nitrite working solution and auxiliary catalyst urea, then start stirring or Circulation pump, take a sample PFS-1# every five minutes, and measure the remaining ferrous content. Wherein the catalyst sodium nitrite is configured as a working solution with a mass fraction of 5‰, 3 kg of the working solution is used per ton of finished product, and the amount of the auxiliary catalyst is 2 g per ton of finished product.

Embodiment 2

[0017] In the experimental kettle of 5L, add 2.4kg pickling waste liquid (wherein ferrous iron is with Fe 2+ The mass fraction is 3%, the acid is H 2 SO 4 The mass fraction is 6%), then add 0.12kg98% sulfuric acid, 1.48kg of titanium dioxide factory by-product ferrous sulfate (ferrous sulfate heptahydrate), add catalyst sodium nitrite working solution and auxiliary catalyst urea, then start stirring or Circulation pump, take a sample PFS-1# every five minutes, and measure the remaining ferrous content. Wherein the catalyst sodium nitrite is configured as a working solution with a mass fraction of 2‰, 6 kg of the working solution is used per ton of finished product, and the amount of the auxiliary catalyst is 3 g per ton of finished product.

Embodiment 3

[0019] In the experimental kettle of 5L, add 2.4kg pickling waste liquid (wherein ferrous iron is with Fe 2+ The mass fraction is 8%, the acid is H 2 SO 4 The mass fraction is 2%), then add 0.15kg98% sulfuric acid, 0.6kg of titanium dioxide factory by-product ferrous sulfate (ferrous sulfate heptahydrate), add catalyst sodium nitrite working solution and auxiliary catalyst urea, then start stirring or Circulation pump, take a sample PFS-1# every five minutes, and measure the remaining ferrous content. Wherein the catalyst sodium nitrite is configured as a working solution with a mass fraction of 6‰, 2 kg of the working solution is used per ton of finished product, and the amount of the auxiliary catalyst is 5 g per ton of finished product.

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Abstract

The invention belongs to the field of preparation of water treatment agents, and relates to a method for preparing polymeric ferric sulfate. An acidic ferrous solution is produced to obtain polymeric ferric sulfate under the action of an oxidant in the presence of a catalyst and an auxiliary catalyst, wherein the auxiliary catalyst is urea. The method has the beneficial effects that an acid-washed waste liquid is used as a raw material, the waste resource utilization is realized, the urea is oxidized to produce carbon dioxide and nitrogen to achieve the purposes of non-residue and non-emission, the environmental protection requirement and recycling economy development requirement are met, and the production efficiency is greatly improved by using the urea as the auxiliary catalyst.

Description

technical field [0001] The invention belongs to the field of preparation of water treatment agents, in particular to a preparation method of polyferric sulfate. Background technique [0002] The commonly used inorganic coagulants are mainly divided into two categories: aluminum salts and iron salts. Among the aluminum salts, polyaluminum chloride, aluminum sulfate and aluminum chloride are the main ones. The iron salt is mainly polyferric sulfate. Since the 1960s, polyaluminum chloride has occupied a place in the market with its unique advantages, but the advancement of technology has also exposed certain shortcomings. Polyferric sulfate was first invented by Japan in the 1970s, and it was developed and put into industrial production in my country in the 1980s. Especially after my country's Ministry of Environmental Protection announced the "Water Ten Measures" in 2015, the application of polyferric sulfate in sewage treatment has been more fully developed. [0003] Howe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/14C02F1/52
CPCC01G49/14C01P2006/10C02F1/5245
Inventor 韩晓刚李雪峰顾玲玲蒋晓春刘军
Owner CHANGZHOU QINGLIU WATER TREATMENT AGENT
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