Process for preparing polymeric aluminium chloride through dimensionally stable anodes

A technology of polyaluminum chloride and aluminum trichloride, which is applied in the direction of electrolytic components and electrolytic processes, can solve the problems of aluminum material consumption and production costs, and cannot meet the needs of large-scale production, so as to save production costs, and the preparation process is easy to control. The effect of low process conditions

Active Publication Date: 2008-06-11
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation of PAC by electrolysis is a promising method. However, during the electrolysis preparation process, the dissolution of the anode aluminum plate leads to the consumption of aluminum, which makes the production cost of this method relatively high, so it cannot meet the needs of large-scale production.

Method used

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  • Process for preparing polymeric aluminium chloride through dimensionally stable anodes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] As shown in the accompanying drawing, in a plexiglass electrolytic cell with a volume of 1 L, 0.8 L of 0.5 mol / L aluminum trichloride electrolyte is added, and the electrolytic preparation is carried out under the following conditions.

[0033] Anode: ruthenium titanium mesh, the effective electrode area is 5.4dm 2 (60mm×90mm)

[0034] Cathode: Titanium mesh, the effective electrode area is 5.4dm 2(60mm×90mm)

[0035] Power supply: DC stabilized voltage stabilized current power supply

[0036] Voltage: 4.0~5.0V

[0037] Temperature: 15~40℃

[0038] Pole spacing: 15mm

[0039] Current density: 1.0A / dm 2

[0040] Electrolysis time: 8 hours

[0041] Electrode connection mode: 4 sets of electrodes connected in unipolar parallel

[0042] After electrolysis, the product is analyzed, the main indicators are as follows:

[0043] Total aluminum concentration: 0.56mol / L

[0044] Al 13 Content: 85.2%

[0045] Available chlorine content: 1720ppm

[0046] Alkalinity: 2...

Embodiment 2

[0049] As shown in the accompanying drawing, in a plexiglass electrolytic cell with a volume of 1 L, 0.8 L of 0.80 mol / L aluminum trichloride electrolyte is added, and the electrolytic preparation is carried out under the following conditions.

[0050] Anode: ruthenium titanium mesh, the effective electrode area is 5.4dm 2 (60mm×90mm)

[0051] Cathode: Titanium mesh, the effective electrode area is 5.4dm 2 (60mm×90mm)

[0052] Power supply: DC stabilized voltage stabilized current power supply

[0053] Voltage: 3.5~4.5V

[0054] Temperature: 15~45℃

[0055] Pole spacing: 10mm

[0056] Current density: 1.2A / dm 2

[0057] Electrolysis time: 15 hours

[0058] Electrode connection mode: 4 sets of electrodes connected in unipolar parallel

[0059] After electrolysis, the product is analyzed, the main indicators are as follows:

[0060] Total aluminum concentration: 1.06mol / L

[0061] Al 13 Content: 86.2%

[0062] Available chlorine content: 1510ppm

[0063] Alkalinity...

Embodiment 3

[0066] As shown in the accompanying drawing, in a plexiglass electrolytic cell with a volume of 1 L, add 0.8 L of 1.0 mol / L aluminum trichloride electrolyte, and perform electrolytic preparation under the following conditions.

[0067] Anode: ruthenium titanium mesh, the effective electrode area is 54dm 2 (60mm×90mm)

[0068] Cathode: Titanium mesh, the effective electrode area is 5.4dm 2 (60mm×90mm)

[0069] Power supply: DC stabilized voltage stabilized current power supply

[0070] Voltage: 3.0~4.0V

[0071] Temperature: 15~45℃

[0072] Pole spacing: 15mm

[0073] Current density: 1.5A / dm 2

[0074] Electrolysis time: 20 hours

[0075] Electrode connection mode: 4 sets of electrodes connected in unipolar parallel

[0076] After electrolysis, the product is analyzed, the main indicators are as follows:

[0077] Total aluminum concentration: 1.27mol / L

[0078] Al 13 Content: 72.3%

[0079] Available chlorine content: 1100ppm

[0080] Alkalinity: 1.84

[0081] p...

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Abstract

The invention discloses a process for preparing high grade polymeric aluminium chloride through electrolysis of shape stable anode, wherein aluminium chloride is used as electrolyte, shape stable anode is used as the anode, titanium as cathode, appling DC electricity for a predetermined period of time, and circulating the electrolyte.

Description

technical field [0001] The invention provides a method for preparing a flocculant for water treatment, specifically a flocculant with high total aluminum concentration, Al 13 The preparation method of polyaluminium chloride with content and available chlorine content. technical background [0002] Flocculation is an important part of water treatment process. With the development of industry and the increasingly serious pollution of the environment and water bodies, it has become an important research and application topic in modern water treatment technology to strengthen the advanced treatment of conventional water purification processes and achieve high-efficiency flocculation. [0003] Inorganic macromolecule flocculants are special chemical agents used in large quantities and widely in the field of water treatment technology. Compared with traditional flocculants, such as aluminum sulfate, aluminum chloride, ferric chloride, etc., it can significantly improve the water...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B1/26
Inventor 曲久辉胡承志刘会娟雷鹏举
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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