Process for preparing polymeric aluminium chloride through dimensionally stable anodes

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...

Examples

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...

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...

Examples

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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