Method for preparing polysilicate aluminum ferric chloride by using aluminum foil acid and ferrous acid

A technology of aluminum silicate chloride and aluminum foil acid, which is applied in chemical instruments and methods, inorganic chemistry, silicon compounds, etc., to achieve the effects of good stability, short settling time, and convenient industrial production

Active Publication Date: 2012-09-26
GUANGDONG HUAFENG NEW ENERGY TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] For the present invention's utilization of aluminum foil acid, iron and steel pickling liquid and aluminum slag as raw materials to prepare polysilicate aluminum chloride ferric polymer flocculant with good storage stability and flocculation performance, there is no literature report yet

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A kind of method that utilizes aluminum foil acid, ferric acid to prepare polyaluminum ferric chloride silicate, comprises the steps:

[0016] (1) After mixing 100 parts of steel pickling liquid and 200 parts of aluminum foil acid, react with 1.5 parts of oxidant sodium chlorate, control the temperature at 50 ° C, and react for 0.5 hours;

[0017] (2) Continue to add 800 parts of aluminum foil acid, control the temperature of the mixed solution to 40°C, add 100 parts of sodium metasilicate pentahydrate solution dropwise according to the ratio of Si / (Al+Fe) of 0.05, and react for 1 hour;

[0018] (3) Then add 70 parts of Al(OH) 3 The aluminum slag made the mixed solution alkalized, polymerized, aged, and the pH value was controlled at 2.0, and reacted for 1 hour to finally obtain the inorganic polymer flocculant polymerized aluminum silicate ferric chloride solution.

Embodiment 2

[0020] A kind of method that utilizes aluminum foil acid, ferric acid to prepare polyaluminum ferric chloride silicate, comprises the steps:

[0021] (1) After mixing 100 parts of steel pickling liquid and 200 parts of aluminum foil acid, react with 2.0 parts of oxidant sodium chlorate, control the temperature at 60 ° C, and react for 1 hour;

[0022] (2) Continue to add 1000 parts of aluminum foil acid, control the temperature of the mixed solution to 50°C, add 200 parts of sodium metasilicate pentahydrate solution dropwise according to the ratio of Si / (Al+Fe) of 0.1, and react for 2 hours;

[0023] (3) Then add 86 parts of Al(OH) 3 The aluminum slag makes the mixed solution alkalized, polymerized, aged, and the pH value is controlled at 2.5, and reacted for 2 hours to finally obtain the inorganic polymer flocculant polymerized aluminum silicate ferric chloride solution.

Embodiment 3

[0025] A kind of method that utilizes aluminum foil acid, ferric acid to prepare polyaluminum ferric chloride silicate, comprises the steps:

[0026] (1) After mixing 100 parts of steel pickling solution with 200 parts of aluminum foil acid, react with 3 parts of oxidant sodium chlorate, control the temperature at 80 ° C, and react for 2 hours;

[0027] (2) Continue to add 1300 parts of aluminum foil acid, control the temperature of the mixed solution at 60°C, add 300 parts of sodium metasilicate pentahydrate solution dropwise according to the ratio of Si / (Al+Fe) of 0.2, and react for 4 hours;

[0028] (3) Then add 112 parts of Al(OH) 3 The aluminum slag makes the mixed solution alkalized, polymerized, aged, and the pH value is controlled at 3.5, and reacted for 3 hours to finally obtain the inorganic polymer flocculant polymerized aluminum silicate ferric chloride solution.

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Abstract

The invention relates to a method for preparing polysilicate aluminum ferric chloride by using aluminum foil acid and ferrous acid, in particular to a method for preparing the polysilicate aluminum ferric chloride by copolymerization of aluminum foil acid, iron and steel picking solution, aluminum slag and other industrial wastes as main raw materials as well as pentahydrate sodium silicate, and belongs to the technical field of recycling of aluminum foil acid and aluminum slag resources in the electronic aluminum foil industry. The object of the invention is to provide a method for preparing the polysilicate aluminum ferric chloride with high flocculability and stability by using the aluminum foil acid and other wastes. The polysilicate aluminum ferric chloride is finally prepared by ferrite oxidization, silicic acid activation, basification and polymerization and other processes; and a coagulant prepared by the method can be widely used for treatment such as dyeing wastewater, domestic sewage, industrial wastewater treatment, and has strong COD (Chemical Oxygen Demand) removal, decoloring and turbidity removal capabilities, the formed floc is large and dense, and the settlement time of the floc is short.

Description

technical field [0001] The invention relates to a method for preparing polyaluminum ferric chloride silicate, in particular to a method for preparing polyaluminum ferric silicate by using aluminum foil acid and ferric acid, and belongs to the field of aluminum foil acid and aluminum slag resource recycling in the electronic aluminum foil industry , specifically relates to an aluminum foil acid (AlCl 3 content of 7-15%, HCl content of 2.0-4.0%), iron and steel pickling solution (Fe content of 5-10%, H 2 SO 4 Content 3-5%), water glass and aluminum slag to produce the method for high-efficiency flocculant polysilicate aluminum ferric chloride for sewage treatment. Background technique [0002] Aluminum ferric chloride polysilicate is a compound inorganic polymer flocculant developed on the basis of polysilicate, aluminum salt and iron salt flocculant. Negatively charged polysilicic acid has a high relative molecular mass and has a strong adsorption capacity for coll...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/20C02F1/52
Inventor 龚圣王文宝
Owner GUANGDONG HUAFENG NEW ENERGY TECH CO LTD
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