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Method for synthesizing polyaluminum sulfate chloride water purifier by using aluminum foil corrosion waste acid and waste aluminum

A technology for aluminum foil to corrode waste acid and polysulfide aluminum chloride. It is applied in the direction of flocculation/sedimentation water/sewage treatment. It can solve the problems of not conforming to the concept of environmental protection and circular economy, neglecting resource recycling and reuse, etc., and achieve great social value. , The effect of good promotion value and reduction of production costs

Inactive Publication Date: 2015-08-12
HEZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ignoring the recycling and reuse of resources in waste acid, it is completely inconsistent with the concept of environmental protection and circular economy

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) Add waste aluminum with a solid-to-liquid ratio of 8g / L to the waste acid for aluminum foil corrosion, and react at a temperature of 90°C until no bubbles are generated. Remove unreacted scrap aluminum by filtration. The filtrate was adjusted to pH 7 with 4 mol / L ammonia water, and filtered with suction to obtain aluminum hydroxide gel.

[0020] (2) Add aluminum foil corrosion waste acid to the reactor, then add aluminum hydroxide gel with a solid-to-liquid ratio of 120g / L, react at a temperature of 80-100°C for 4 hours with stirring, and then mature at a curing temperature of 70°C for 10 hours , recrystallized and dried to obtain a solid product - polysulfide aluminum chloride water purifier.

[0021] The polysulfide aluminum chloride water purifying agent of above-mentioned synthesis is added to laboratory with kaolin preparation turbidity is the sewage of 131NTU by 50mg / L, stirs for five minutes, leaves standstill for 30 minutes, and measuring residual turbidity...

Embodiment 2

[0023] (1) Add waste aluminum with a solid-to-liquid ratio of 10g / L to the waste acid for aluminum foil corrosion, and react at a temperature of 90°C until no bubbles are generated. Remove unreacted scrap aluminum by filtration. The filtrate was adjusted to pH 7 with 4 mol / L ammonia water, and filtered with suction to obtain aluminum hydroxide gel.

[0024] (2) Add aluminum foil corrosion waste acid to the reactor, then add aluminum hydroxide gel with a solid-to-liquid ratio of 160g / L, react at a temperature of 90°C for 5 hours, then mature at a curing temperature of 70°C for 12 hours, and re- Crystallize and dry to obtain a solid product - polysulfide aluminum chloride water purifier.

[0025] Add the above-mentioned synthetic polysulfide aluminum chloride water purifier to 50 mg / L of laboratory kaolin to prepare sewage with a turbidity of 131 NTU, stir for five minutes, let stand for 30 minutes, take the supernatant, and measure the residual turbidity It is 5.6NTU, and the...

Embodiment 3

[0027] (1) Add waste aluminum with a solid-to-liquid ratio of 8g / L to the waste acid for aluminum foil corrosion, and react at a temperature of 90°C until no bubbles are generated. Remove unreacted scrap aluminum by filtration. The filtrate was adjusted to pH 7 with 4 mol / L ammonia water, and filtered with suction to obtain aluminum hydroxide gel.

[0028] (2) Add aluminum foil corrosion waste acid to the reactor, then add aluminum hydroxide gel with a solid-to-liquid ratio of 120g / L, react at a temperature of 80°C with stirring for 5 hours, then mature at a curing temperature of 50°C for 10 hours, and re- Crystallize and dry to obtain a solid product - polysulfide aluminum chloride water purifier.

[0029] The polysulfide aluminum chloride water purifying agent of above-mentioned synthesis is added to laboratory with kaolin preparation turbidity is the sewage of 131NTU by 50mg / L, stirs for five minutes, leaves standstill for 30 minutes, and measuring residual turbidity is 9....

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PUM

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Abstract

The invention discloses a method for synthesizing a polyaluminum sulfate chloride water purifier by using aluminum foil corrosion waste acid and waste aluminum. The product is extensively applied to purifying drinking water and industrial water and treating sewage. The method comprises the following steps: adding the waste aluminum into the aluminum foil corrosion waste acid, filtering after sufficiently reacting, adding ammonia water into filtrate to regulate the pH value of the filtrate, and thereby obtaining aluminum hydroxide gel; adding the aluminum hydroxide gel and the aluminum foil corrosion waste acid into a reactor for heating, stirring, polymerizing, curing and re-crystallizing to prepare the polyaluminum sulfate chloride water purifier. According to the method disclosed by the invention, the aluminum foil corrosion waste acid comprises useful ingredients of Al<3+>, SO4<2->, Cl<-> and the like which are used for synthesizing the polyaluminum sulfate chloride, and the polyaluminum sulfate chloride water purifier can be synthesized through the design, so that the resources are effectively utilized to solve a waste acid treatment problem, the purpose of using waste to treat waste is achieved, and social significance and economic significance are achieved.

Description

technical field [0001] The invention belongs to the technical field of water purifiers, in particular to a method for synthesizing a polysulfide aluminum chloride water purifier by corroding waste acid and waste aluminum with aluminum foil. Background technique [0002] Polysulfide aluminum chloride water purifying agent is an inorganic polymer high-efficiency water treatment agent with broad development prospects in industrial wastewater treatment. Because of its good water purification coagulation performance, large flocs, less dosage, high efficiency, fast settlement, wide application range and rapid development, it has become an excellent water purification agent recognized internationally. The general method is to add an appropriate amount of H to polyaluminum chloride. 2 SO 4 It can be obtained by polymerizing with hydrochloric acid as a re-polymerization accelerator or by filtering the solid obtained from the hydrolyzate of aluminum sulfate solution and ammonia wate...

Claims

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Application Information

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IPC IPC(8): C02F1/52
Inventor 汤泉梁冬梅苏辉兰陈伟玲余炳锋谢微
Owner HEZHOU UNIV
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