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Highly basic aluminum chloride and method for producing same

A technology of aluminum chloride and high salt, applied in the direction of aluminum chloride, chemical instruments and methods, aluminum halide, etc., to achieve the effect of storage stability

Active Publication Date: 2018-12-21
ASAHI CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] In addition, it is described that the washing water after washing may contain only sulfate ion of 1 mg / L or less. In the water to be treated, the aggregation of suspended matter or dissolved organic matter in the water to be treated cannot be carried out well.

Method used

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  • Highly basic aluminum chloride and method for producing same
  • Highly basic aluminum chloride and method for producing same
  • Highly basic aluminum chloride and method for producing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] The sodium aluminate solution of 109.0g (converted into Al 2 o 3 18.8%, converted to Na 2 O is 19.4%) and 7.0 g of sodium silicate solution (converted to SiO 2 is 28%, converted to Na 2 O is 10%) mixed. The basic aluminum chloride solution first solution of 231.4g (basic aluminum chloride, basicity is 52%, Al 2 o 3 10.3%, SO 4 is 2.6%, and Cl is 11.4%) to generate alumina gel.

[0064] Then, the gel was matured at room temperature for 0.25 to 2 hours, and further added 290.9 g of the basic aluminum chloride second solution (the basicity was 46.8%, Al 2 o 3 is 19.7%, Cl is 22.7%) and 5.3g of liquid aluminum sulfate (Al 2 o 3 8.0%, SO 4 was 22.3%) and dissolved. The solution was matured for 90 minutes at 30-50°C to obtain a high-basic aluminum chloride solution (Al 2 o 3 was 10.3%). The composition of the obtained high-basic aluminum chloride is Si / Al 2 o 3 (Molar ratio)=0.03, Na / Al 2 o 3 (Molar ratio)=0.7, Cl / Al 2 o 3 (Molar ratio)=2.6, SO 4 / Al ...

Embodiment 2

[0070] Except that the second solution of basic aluminum chloride in Example 1 is basic aluminum chloride synthesized by adding 2% magnesium chloride (35% hydrochloric acid: 649g, aluminum hydroxide (water content: 2.6%): 325.3g, water: 35.7g, anhydrous magnesium chloride: 20g was reacted in an autoclave at 160° C. for 160 minutes), except that the same operation as in Example 1 was carried out to obtain high-basic aluminum chloride. The composition is shown in Table 1. In addition, it tested and evaluated similarly to Example 1. The evaluation results are shown in Tables 3-5.

Embodiment 3

[0072] Except that the second solution of basic aluminum chloride is basic aluminum chloride prepared in the same manner as in Example 2, and the gel is dissolved without adding aluminum sulfate, the same operation as in Example 1 was performed to obtain high-basic aluminum chloride. The composition is shown in Table 1. In addition, it tested and evaluated similarly to Example 1. The evaluation results are shown in Tables 3-5.

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Abstract

Provided is a highly basic aluminum chloride having a composition in which Si / Al2O3 (molar ratio)=0.001 to 0.1, M / Al2O3 (molar ratio)=0.1 to 1.2 (M is the number of moles of alkali metal), E / Al2O3 (molar ratio)=0 to 0.3 (E is the number of moles of alkali earth metal), Cl / Al2O3 (molar ratio)=1.0 to 3.0, and SO4 / Al2O3 (molar ratio)=0 to 0.08. Also provided is a method for producing the highly basicaluminum chloride which is characterized by including: a first step of reacting a basic aluminum chloride first solution having a basicity of 40 to 65% with an alkali solution containing alkali silicate to produce an alumina gel; a second step of adding the alumina gel obtained in the first step to a basic aluminum chloride second solution having a basicity of 40 to 55% and dissolving the same; and a third step of aging the basic aluminum chloride second solution at 30 to 60 DEG C.

Description

technical field [0001] The present invention relates to a high-basic aluminum chloride (high-basic aluminum chloride) used as a coagulant for water treatment such as industrial wastewater, water, and sewage, and further relates to a high-basic aluminum chloride excellent in storage stability. Aluminum can cope with wide fluctuations in various types of pH, alkalinity (alkalinity), dissolved ions, turbidity, etc. based on water to be treated, and can also cope with large temperature changes during storage. Background technique [0002] Regarding basic aluminum chloride as a coagulant for water treatment, hydrochloric acid and alumina hydrate are usually reacted to produce basic aluminum chloride, and sulfuric acid or water-soluble sulfate is added thereto to prepare sulfate-containing basic chloride aluminum chloride (PAC). [0003] Specifically, it is a method of putting hydrochloric acid and alumina hydrate into an autoclave according to the target basicity, stirring at ab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F7/56C01F7/57
CPCC01F7/57C01F7/56
Inventor 北山博章佐佐木郁子久保广和楫野正行
Owner ASAHI CHEM CO LTD
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