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Production method and process of high-performance polyferric chloride

A technology of polyferric chloride and production method, applied in chemical instruments and methods, iron halide, water/sludge/sewage treatment, etc., can solve problems such as affecting stability, and achieve the effect of improving stability

Inactive Publication Date: 2018-05-15
青岛市昌斯达环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the problem in the prior art that liquid ferric chloride contains a large amount of impurity ions affecting its stability, the present invention provides a production method and process of high-performance polyaluminum chloride, which adopts the method of oxygen oxidation and forced polymerization. Little or no addition of other oxidants and polymerization aids that may remain ions is added to improve the stability of the product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A production method and process of high-performance polyferric chloride, using scrap iron and steel shavings, iron and steel hydrochloric acid cleaning waste liquid, and hydrochloric acid as main raw materials, is characterized in that it includes the following steps:

[0021] Step 1, take iron and steel hydrochloric acid to clean the waste liquid, after filtering, stir and heat in an acid-resistant reaction kettle at 50°C, put in excess scrap iron and steel chips, fully dissolve, add an appropriate amount of hydrochloric acid during the dissolution process to increase the initial concentration of ferrous chloride solution, hydrochloric acid The added amount is not enough to dissolve all scrap iron and steel chips, filter, and the remaining scrap iron and steel chips are reused for dissolving to obtain a ferrous chloride solution, which is stored for later use;

[0022] Step 2, evaporating and concentrating the ferrous chloride solution obtained in step 1 at 90° C., cont...

Embodiment 2

[0026] A production method and process of high-performance polyferric chloride, using scrap iron and steel shavings, iron and steel hydrochloric acid cleaning waste liquid, and hydrochloric acid as main raw materials, is characterized in that it includes the following steps:

[0027] Step 1, take iron and steel hydrochloric acid to clean the waste liquid, after filtering, stir and heat in an acid-resistant reaction kettle at 70°C, put in excess scrap iron and steel chips, and fully dissolve, during the dissolution process, an appropriate amount of hydrochloric acid can be added to increase the initial concentration of ferrous chloride solution, The added amount of hydrochloric acid is not enough to dissolve all scrap iron and steel chips, filter, and the remaining scrap iron and steel chips are reused for dissolving to obtain ferrous chloride solution, which is stored for later use;

[0028] In step 2, the ferrous chloride solution obtained in step 1 is evaporated and concentra...

Embodiment 3

[0032] A production method and process of high-performance polyferric chloride, using scrap iron and steel shavings, iron and steel hydrochloric acid cleaning waste liquid, and hydrochloric acid as main raw materials, is characterized in that it includes the following steps:

[0033] Step 1, take iron and steel hydrochloric acid to clean waste liquid, after filtering, stir and heat in an acid-resistant reaction kettle at 90°C, put in excess scrap iron and steel chips, fully dissolve, and add hydrochloric acid in an appropriate amount during the dissolution process to increase the initial Ferrous chloride solution concentration, Filtration, and the residual steel scraps are reused for dissolving to obtain a ferrous chloride solution, which is stored for later use;

[0034] In step 2, the ferrous chloride solution obtained in step 1 is evaporated and concentrated at 100°C. During the process, continuous stirring is carried out and circulating oxygen is introduced for oxidation. D...

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Abstract

The invention discloses a production method and process of high-performance polyferric chloride. Waste steel scraps, steel hydrochloric acid cleaning waste liquid and hydrochloric acid are used as main raw materials, and oxygen oxidization and mandatory polymerization methods are adopted; a few of or even no oxidants and polymerization additives which possibly contain remaining interference ions are added in an oxidization process and a polymerization process, so as to improve the stability of the product.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to a production method and process of high-performance polyferric chloride. Background technique [0002] In the steel processing industry, it is often necessary to use hydrochloric acid to clean the rust and burrs on the steel surface. During the pickling process, the acid concentration of the hydrochloric acid solution will decrease continuously, and the cleaning ability will also decrease. Valence ferrous ions. The used cleaning waste liquid generally contains 10-20% ferrous chloride and 3-10% hydrogen chloride. If the waste liquid is directly treated with alkali, it will not only pollute the environment, but also waste ferrous ions and hydrochloric acid. The method of concentrating or roasting to recover hydrochloric acid has the problems of high energy consumption, large equipment investment, serious corrosion and harsh operating environment. The country produces mi...

Claims

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Application Information

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IPC IPC(8): C01G49/10C02F1/00C02F11/14
CPCC01G49/10C02F1/00C02F11/14
Inventor 黄祥虎林海舰李震陈群
Owner 青岛市昌斯达环保科技有限公司
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