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Production process of aluminum sol and aluminum sol prepared by production process

A production process, aluminum sol technology, applied in the direction of alumina/aluminum hydroxide, aluminum compounds, chemical instruments and methods, etc., can solve the problems of low purity of aluminum sol, achieve low impurity content, short reaction cycle, and low reaction temperature Effect

Active Publication Date: 2021-05-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the raw materials often contain impurities, and the purity of the prepared aluminum sol is relatively low

Method used

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  • Production process of aluminum sol and aluminum sol prepared by production process
  • Production process of aluminum sol and aluminum sol prepared by production process
  • Production process of aluminum sol and aluminum sol prepared by production process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0090] According to a preferred embodiment of the present invention, the aluminum-chlorine mass ratio of the aluminum sol is 1-1.6, preferably 1-1.4, more preferably 1-1.2.

[0091] According to a preferred embodiment of the present invention, the pH value of the aluminum sol is 3.5-4.5.

[0092] According to a preferred embodiment of the present invention, in the aluminum sol, Al 2 o 3 The calculated aluminum content is 5-30% by weight.

[0093] The present invention will be described in detail below in conjunction with the examples, but the scope of the present invention is not limited thereby.

[0094] In the following examples, the method specified in RIPP34-90 was used to measure the aluminum content in the prepared aluminum sol product, and the ion chromatography method was used to measure the chlorine content in the prepared aluminum sol product.

[0095] The pH value of the aluminum sol was measured with a pH meter (purchased from Mettler-Toledo).

[0096] The exis...

Embodiment 1

[0098] (1) With stirring, at ambient temperature (25°C, the same below), slowly add 515g of ammonia water with a concentration of 15% by weight into 900g of aluminum chloride solution with a concentration of 20% by weight, and stir for 0.5h to obtain pH For the first reaction liquid of 3.4, the temperature of the first reaction liquid was raised to 50° C., and stirred and reacted at this temperature for 0.5 hours.

[0099] (2) With stirring, the heated solution obtained in step (1) is contacted with 160 g of ammonia water at a concentration of 15% by weight to obtain a second reaction solution with a pH of 3.7, and the temperature of the second reaction solution is raised to 70° C. , and the reaction was stirred at this temperature for 6 hours, then cooled to ambient temperature to obtain a concentration of 4.5% by weight (as Al 2 o 3 ) of salt-containing aluminum sol.

[0100] (3) Ordinary electrodialysis: the salt-containing aluminum sol obtained in step (2) is stored in t...

Embodiment 2

[0107] (1) With stirring, at ambient temperature (25° C., the same below), 660 g of a concentration of 15% by weight of sodium hydroxide aqueous solution is slowly added to 920 g of a concentration of 20% by weight of aluminum chloride solution, and with stirring for 1 h, To obtain a first reaction solution with a pH of 3.3, the temperature of the first reaction solution was raised to 55° C., and stirred and reacted at this temperature for 1 hour.

[0108] (2) With stirring, the heated solution obtained in step (1) is contacted with 110 g of a concentration of sodium hydroxide aqueous solution of 15% by weight to obtain a second reaction solution with a pH of 3.7, and the temperature of the second reaction solution is raised to 80°C, and the reaction was stirred at this temperature for 6.5 hours, then cooled to ambient temperature to obtain a concentration of 4.3% by weight (as Al 2 o 3 ) of salt-containing aluminum sol.

[0109] (3) Ordinary electrodialysis: the salt-contai...

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Abstract

The invention discloses an aluminum sol production process and aluminum sol produced by the process, and the process comprises the following steps: carrying out first contact on an aluminum source and a first alkali source to obtain a first reaction solution with the pH value of 3-5, then carrying out first heating aging, carrying out second contact on the solution subjected to the first heating aging and a second alkali source to obtain a second reaction solution with the pH value of 3-4.5, then carrying out secondary heating aging, and carrying out common electrodialysis on the obtained salt-containing aluminum sol to obtain aluminum sol and recovered salt; and allowing the recovered salt to be subjected to bipolar membrane electrodialysis to respectively obtain a product acid and recovered alkali, and circularly using at least part of the recovered alkali in the step (1) and / or the step (2); The primary heating aging and the secondary heating aging are carried out at the temperature of not more than 100 DEG C. The production process provided by the invention has the advantages of low production cost, mild conditions in the whole production process, basically no waste emission, and good quality of the prepared alumina sol product.

Description

technical field [0001] The invention relates to the field of aluminum sol production, in particular to an aluminum sol production process and the aluminum sol produced by the production process. Background technique [0002] Aluminum sol is a colloidal solution in which fine particles of positively charged hydrated alumina are uniformly dispersed in water. At present, aluminum sol is widely used as catalyst binder and water treatment flocculant in industry. According to different application fields, the naming methods of aluminum sol are also different. For example, when it is used in catalyst binder, it is generally called aluminum sol; when it is used in flocculant, it is called polyaluminum chloride or basic chloride Aluminum, but its general structural formula can be expressed as: [Al 2 (OH) n Cl 6-n ·xH 2 O] m (n=1-5, m>0). [0003] The properties of aluminum sol can generally be expressed by the aluminum content, and the ratio of aluminum to chlorine (that is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F7/02B01J21/04
CPCC01F7/026B01J21/04
Inventor 周丽娜刘中清罗一斌舒兴田
Owner CHINA PETROLEUM & CHEM CORP
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