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Polymeric aluminum chlorides solution

A technology of polyaluminum chloride and solution, which is applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of general flocculant quality, low flocculation effect, high salt content, etc., and achieve excellent flocculation effect

Inactive Publication Date: 2007-10-17
SACHTLEBEN CHEM GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] - Due to the limitation of the reaction raw materials, the polyaluminum chloride solution contains high content of Cl - ions, which lead to higher salinity in the water to be treated;
[0015] —Al 3+ The maximum concentration of ions is 4.6% [page 9, embodiment 10-11], which will adversely affect the flocculation of polyaluminum chloride solution;
[0016] - Utilize this method to be unable to obtain the basicity higher than 55%, especially 60 to 65%, and this is unfavorable to the flocculation property of polyaluminum chloride
[0017] In conclusion, the preparation process recommended in WO-A-0144110 can only lead to products with little flocculation effect, so that the flocculant quality is mediocre

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] While stirring at room temperature, 590 g of commercially available polyaluminum chloride (8.9% Al 3+ Ionic, 21.0% Cl - ion, alkalinity: 40%) with 40g of Mg(OH) 2 mix. The solution was then heated to 60°C with constant stirring until the magnesium salt was completely dissolved. The concentrate was then diluted with 370 g of water. The product has the following composition: 5.3% Al 3+ Ionic, 12.4% Cl - Ionic, 1.7% Mg 2+ Ionic; Alkalinity: 64%. The product becomes a gel after 6 weeks.

Embodiment 1a

[0051] While stirring at room temperature, 590 g of commercially available polyaluminum chloride (8.9% Al 3+ Ionic, 21.0% Cl - ion, alkalinity: 40%) with 40g of Mg(OH) 2 mix. The solution was then heated to 60°C with constant stirring until the magnesium salt was completely dissolved. Dissolve 9 g of B(OH) into the solution while stirring 3 . The concentrate was then diluted with 370 g of water. The product has the following composition: 5.3% Al 3+ Ionic, 12.4% Cl - Ionic, 1.7% Mg 2+ Ionic, 0.9% B 3+ Ionic; Alkalinity: 64%. The product remained stable as a solution after 6 weeks.

Embodiment 2

[0053] 830 g of commercially available polyaluminum chloride (8.9% Al 3+ Ionic, 21.0% Cl - ion, alkalinity: 40%) with 55g of Mg(OH) 2 mix. The solution was then heated to 60°C with constant stirring until the magnesium salt was completely dissolved. The concentrate was then diluted with 115 g of water. The product has the following composition: 7.4% Al 3+ Ionic, 17.4% Cl - Ionic, 2.3% Mg 2+ Ionic; Alkalinity: 63%. The product becomes a gel after 6 weeks.

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PUM

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Abstract

The content of the invention relates to a polymer AlCl3 solution with high alkalinity and free of sulfide, preparation of the solution and its application in water purification and paper-making industry.

Description

technical field [0001] The content of the invention lies in a sulfate-free polyaluminum chloride solution with high alkalinity, the preparation of the solution and its application in water purification and papermaking. Background technique [0002] In the water purification process, flocculants and coagulants are required according to the prior art. Depending on the type of polluted water, it is usually necessary to use aluminum compounds such as aluminum chloride, aluminum sulfate and polyaluminum chloride, iron compounds such as ferric sulfate and ferric chloride, cationic, anionic and nonionic polyelectrolytes such as polyacrylamide, polydadmac (polydiallyldimethylammonium chloride) and polyamines and layered silicates such as bentonite. [0003] Commercial flocculants are prepared, sold and used as aqueous solutions. [0004] Both aluminum and iron salts and polyelectrolytes can be used in industrial wastewater, while iron salts are mainly used in public wastewater. T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52
Inventor H·玛洛斯基S·弗尔姆特A·弗科维奇
Owner SACHTLEBEN CHEM GMBH