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Process for preparing polymeric aluminium chloride through dimensionally stable anodes

A technology of polyaluminum chloride and aluminum trichloride is applied in the direction of electrolysis components, electrolysis process, etc., can solve the problems of inability to meet large-scale production, consumption of production costs of aluminum materials, etc. good quality effect

Active Publication Date: 2005-06-22
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 figure, in a 1L plexiglass electrolytic cell, 0.8L of 0.5mol / L aluminum trichloride electrolyte was added, and electrolysis was carried out under the following conditions.

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

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

[0035] Power supply: DC 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 groups of electrodes are connected in parallel

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

[0043] Total aluminum concentration: 0.56mol / L

[0044] Al 13 Content: 85.2%

[0045] Effective chlorine content: 1720ppm

[0046] Alkalinity: 2.32

[0047] pH: 4.56

Embodiment 2

[0049] As shown in the figure, in a 1L organic glass electrolytic cell, 0.80 mol / L of aluminum trichloride electrolyte was added to 0.8L, and electrolysis was carried out under the following conditions.

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

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

[0052] Power supply: DC 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 groups of electrodes are connected in parallel

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

[0060] Total aluminum concentration: 1.06mol / L

[0061] Al 13 Content: 86.2%

[0062] Effective chlorine content: 1510ppm

[0063] Alkalinity: 2.19

[0064] pH: 4.17

Embodiment 3

[0066] As shown in the figure, in a 1L plexiglass electrolytic cell, 0.8L of 1.0mol / L aluminum trichloride electrolyte was added, and electrolysis was carried out under the following conditions.

[0067] Anode: Ruthenium titanium mesh, effective electrode area is 5.4dm 2 (60mm×90mm)

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

[0069] Power supply: DC 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 groups of electrodes are connected in parallel

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

[0077] Total aluminum concentration: 1.27mol / L

[0078] Al 13 Content: 72.3%

[0079] Effective chlorine content: 1100ppm

[0080] Alkalinity: 1.84

[0081] pH: 3.90

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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, in particular a method with high total aluminum concentration, Al 13 Preparation method of polyaluminum chloride with content and available chlorine content. technical background [0002] Flocculation is an important part of the water treatment process. With the development of industry and the increasingly serious pollution of the environment and water bodies, strengthening the advanced treatment of conventional water purification processes and realizing efficient flocculation have become important research and application topics in modern water treatment technology. [0003] Inorganic polymer flocculant is a special chemical agent that is widely used in the field of water treatment technology. Compared with traditional flocculants, such as aluminum sulfate, aluminum chloride, ferric chloride, etc., it can significantly improve water purification efficiency, and has the advantag...

Claims

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Application Information

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Patent Type & Authority Applications(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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