Method for preparing polysilicate aluminum by using waste catalyst

A technology of waste catalyst and polysilicon aluminum, which is applied in the direction of chemical instruments and methods, aluminum silicate, silicate, etc., can solve the problems of secondary pollution of water quality, achieve the goal of increasing leaching rate, accelerating reaction rate and reducing production cost Effect

Active Publication Date: 2020-01-10
山东聚杰环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The process route of this method is simple, and it provides a cheap synthetic route for the preparation of polysilicoaluminum sulfate, but the harmful elements such as heavy metals Ni, V, Ti, Pb, Sb in the waste catalyst enter into the product, if applied to water treatment industry, which is likely to cause secondary pollution of water quality

Method used

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  • Method for preparing polysilicate aluminum by using waste catalyst
  • Method for preparing polysilicate aluminum by using waste catalyst
  • Method for preparing polysilicate aluminum by using waste catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] (1) 230ml 32% sodium hydroxide solution and 100g FCC waste catalyst are mixed in a stainless steel autoclave, the stirring speed is set at 800 rev / min, and the electric heating is heated to maintain a reaction temperature of 140°C and a pressure of 0.42MPa. Alkali leaching reaction 2h. After the reaction is completed, it is transferred to a titanium rod filter while it is hot, and forced to filter under an air pressure of 0.6 MPa to obtain an aluminosilicate solution.

[0053] (2) Transfer the aluminosilicate solution to a three-necked flask, add 25% sulfuric acid solution dropwise under stirring to adjust the pH=1.2, consume 530ml of 25% sulfuric acid, control the reaction temperature in a water bath to 70°C, and add the solution for 40 minutes. After completion, it is matured for 1.5 hours to obtain a liquid polysilicon aluminum sulfate.

[0054] Detection of Al in filter residue 2 o 3 and SiO 2 content, calculate Al 2 o 3 The dissolution rate is 82.60%, SiO 2 ...

Embodiment 2

[0056] (1) Mix 130ml of 50% sodium hydroxide solution with 100g of FCC waste catalyst in a stainless steel autoclave, set the stirring speed at 800 rpm, heat up with electric heating, and keep the reaction temperature at 130°C and the pressure at 0.35MPa. Immersion reaction 1.5h. After the reaction is completed, it is transferred to a titanium rod filter while it is hot, and forced to filter under an air pressure of 0.5 MPa to obtain an aluminosilicate solution.

[0057] (2) Transfer the aluminosilicate solution to a three-necked flask, add 20% hydrochloric acid solution dropwise under stirring to adjust the pH=1.7, consume 595ml of 20% hydrochloric acid, control the reaction temperature in a water bath to 55°C, and add the solution for 30 minutes. After completion, it is matured for 1.5 hours to obtain a liquid polysilicon aluminum chloride.

[0058] Detection of Al in filter residue 2 o 3 and SiO 2 content, calculate Al 2 o 3 The dissolution rate is 81.72%, SiO 2 The ...

Embodiment 3

[0060] (1) Mix 410ml of 20% sodium hydroxide solution with 100g of FCC waste catalyst in a stainless steel autoclave, set the stirring speed at 1000 rpm, heat up with electric heating, and maintain the reaction temperature at 150°C and the pressure at 0.5MPa. Immersion reaction 1.5h. After the reaction was completed, it was transferred to a titanium rod filter while it was hot, and forced to filter under an air pressure of 0.4 MPa to obtain an aluminosilicate solution.

[0061] (2) Transfer the aluminosilicate solution to a three-necked flask, add 30% hydrochloric acid solution dropwise under stirring to adjust the pH=0.8, consume 363ml of 30% hydrochloric acid, control the reaction temperature in a water bath to 80°C, and add the solution for 60 minutes. After completion, ripen for 2 hours to obtain the finished liquid polysilicon aluminum chloride.

[0062] Detection of Al in filter residue 2 o 3 and SiO 2 content, calculate Al 2 o 3 The dissolution rate is 80.17%, SiO...

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Abstract

The invention belongs to the technical fields of comprehensive utilization of solid wastes and production of flocculants, and particularly relates to a method for preparing polysilicate aluminum by using a waste catalyst. The method comprises the following steps: carrying out a heating and pressurizing reaction on a sodium hydroxide solution and an FCC waste catalyst, and performing filtration toobtain an aluminosilicate solution; and dropwise adding sulfuric acid or hydrochloric acid into the aluminosilicate solution to adjust the pH value to 0.8-1.7, and performing curing for 1-2 h to obtain liquid polysilicate aluminum sulfate or polysilicate aluminum chloride. The method for preparing polysilicate aluminum by using the waste catalyst avoids the risk of secondary pollution caused by leaching of heavy metal ions using an acid leaching process, and is a polysilicate aluminum preparation method having the advantages of simple process route, low production cost and high Al2O3 and SiO2dissolution rate.

Description

technical field [0001] The invention belongs to the technical field of solid waste comprehensive utilization and flocculant production, and in particular relates to a method for preparing polysilicon aluminum by utilizing waste catalysts. Background technique [0002] Polysilicon aluminum sulfate is referred to as PASS, polysilicon aluminum chloride is referred to as PASC, and hereinafter collectively referred to as polysilicon aluminum. Polysilicon aluminum is a water-soluble inorganic high molecular polymer, which has strong bridging adsorption capacity, high cationic degree, is easily soluble in water, does not form gel, and has good hydrolytic stability. It is suitable for water with a wide range of water quality and is not subject to low water temperature. influence and other characteristics. The positive charge density on the macromolecular chain of polysilicon aluminum is high, the water solubility of the product is good, and the molecular weight is moderate, so it h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/26C02F1/52
CPCC01B33/26C02F1/5245C01P2006/80
Inventor 王文泽梁之举王居亮
Owner 山东聚杰环保科技有限公司
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