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Method for preparing polyaluminum ferric chloride by adopting wastes

A polyaluminum ferric chloride, waste technology, applied in chemical instruments and methods, inorganic chemistry, iron compounds, etc., to achieve the effect of simple reaction process

Inactive Publication Date: 2018-07-13
无锡日月水处理有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are many reports on the preparation of polyaluminum ferric chloride by using red mud and alumina soil as raw materials, but there are few reports on the preparation of polyaluminum ferric chloride (PAFC) by using aluminum profile waste residue as raw materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Adopt waste to prepare the method for polyaluminum ferric chloride, step is as follows:

[0013] (1) Acid dissolution of aluminum profile waste slag: take aluminum profile waste slag, pass through a 100μ sieve, dry at 105°C for 2.5 hours, and set aside; dissolve the obtained aluminum profile waste slag powder in 3.5mol / L NaOH solution, and the ratio of solid to liquid is 3.5 : 1. The leaching reaction was carried out at a leaching temperature of 55°C for 3.5 hours to obtain an aluminum dissolution solution;

[0014] (2) Reaction: Take the aluminum dissolution solution obtained in step (1), add fly ash and waste hydrochloric acid with a mass concentration of 10%, and the reaction ratio of aluminum dissolution solution: fly ash: waste hydrochloric acid is 4:8:3; Heat to 90°C, keep warm and stir, and polymerize for 1 hour to obtain the product polyaluminum ferric chloride.

Embodiment 2

[0016] Adopt waste to prepare the method for polyaluminum ferric chloride, step is as follows:

[0017] (1) Acid dissolution of aluminum profile waste slag: take aluminum profile waste slag, pass through a 100μ sieve, dry at 110°C for 2.5 hours, and set aside; dissolve the obtained aluminum profile waste slag powder in 4.5mol / L NaOH solution, the ratio of solid to liquid is 3.5 : 1. The leaching reaction was carried out at a leaching temperature of 65° C. for 2.5 hours to obtain an aluminum dissolution solution;

[0018] (2) Reaction: Take the aluminum dissolution solution obtained in step (1), add fly ash and waste hydrochloric acid with a mass concentration of 10%-20% to it, and the reaction ratio of aluminum dissolution solution: fly ash: waste hydrochloric acid is 6:10 : 3; heated to 100 ° C, heat preservation and stirring, polymerization reaction time 3h, namely the product polyaluminum ferric chloride.

Embodiment 3

[0020] Adopt waste to prepare the method for polyaluminum ferric chloride, step is as follows:

[0021] (1) Acid dissolution of aluminum profile waste slag: take aluminum profile waste slag, pass through a 100μ sieve, dry at 108°C for 2 hours, and set aside; dissolve the obtained aluminum profile waste slag powder in 4mol / L NaOH solution, and the ratio of solid to liquid is 3:1 , the leaching reaction was carried out at a leaching temperature of 60° C. for 3 hours to obtain an aluminum leaching solution;

[0022] (2) Reaction: Take the aluminum dissolution solution obtained in step (1), add fly ash and waste hydrochloric acid with a mass concentration of 10%-20% to it, and the reaction ratio of aluminum dissolution solution: fly ash: waste hydrochloric acid is 5:9 : 3; heated to 95 ℃, heat preservation and stirring, polymerization reaction time 2h, namely the product polyaluminum ferric chloride.

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Abstract

The invention relates to a method for preparing polyaluminum ferric chloride by adopting wastes, and belongs to the technical field of waste treatment. The method comprises the steps of dissolving a waste aluminum profile to obtain an aluminum solution, compounding with pulverized fuel ash, and reacting with waste gas hydrochloric acid to obtain the polyaluminum ferric chloride. According to the method provided by the invention, the adopted raw materials are industrial wastes, on the basis that a final product has an industrial practical application value, the industrial wastes are greatly treated, and the reaction process is simple and environmentally friendly.

Description

technical field [0001] The invention relates to a method for preparing polyaluminum ferric chloride from waste, in particular to a method for preparing polyaluminum ferric chloride from waste hydrochloric acid, fly ash, kaolin and the like, and belongs to the technical field of waste treatment. Background technique [0002] Polyaluminum ferric chloride (PAFC) is an inorganic polymer coagulant formed by the coagulation and hydrolysis of aluminum and iron salts. Its hydrolysis speed is fast and its hydration is weak. Polyaluminum ferric chloride (PAFC) is an inorganic polymer coagulant formed by the coagulation and hydrolysis of aluminum and iron salts. According to the principle of synergy, it is made by adding elemental iron ions or iron trioxide and other iron-containing compounds. A new type of high-efficiency coagulant. Integrating the respective advantages of aluminum salt and iron salt, the morphology of aluminum ion and iron ion has been significantly improved, and th...

Claims

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Application Information

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IPC IPC(8): C01G49/00C02F1/52
CPCC01G49/009C02F1/5236
Inventor 姚世明
Owner 无锡日月水处理有限公司
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