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Preparation method of poly-aluminum silicate

A technology for polymerizing aluminum silicate and alkali metal silicate, which is applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., to achieve stable service life, good settling performance, and high mechanical strength.

Active Publication Date: 2013-06-19
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But there are few reports about the preparation method of polyaluminosilicate catalyst

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  • Preparation method of poly-aluminum silicate

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specific Embodiment approach 1

[0009] Specific embodiment one: the preparation method of polyaluminum silicate in the present embodiment is carried out according to the following steps: one, with the stirring speed of 100r / min~150r / min constantly stirring concentration is 0.5mol / L~2.0mol / L soluble aluminum salt solution, and slowly drop the alkali metal silicate aqueous solution with a concentration of 0.5mol / L~2.5mol / L until the pH value is 8~9 to obtain a mixed solution; 2. The mixture obtained in step 1 Static settling for 20~30min, then placed in an environment of 40℃~90℃ for activation for 10~30h, the activated sediment was washed repeatedly with deionized water, and a centrifuge at 2000~4000r / min was used for solid-liquid separation. After the pH value of the clear liquid is 7.0~7.5, it is dried, then ground, sieved, and the particle size is 0.075~0.15mm to obtain polyaluminum silicate.

specific Embodiment approach 2

[0010] Embodiment 2: This embodiment differs from Embodiment 1 in that the alkali metal silicate described in Step 1 is sodium silicate, potassium silicate or water glass. Other steps and parameters are the same as in the first embodiment.

specific Embodiment approach 3

[0011] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the soluble aluminum salt in step 1 is aluminum nitrate, aluminum sulfate or aluminum chloride. Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.

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Abstract

The invention provides a preparation method of poly-aluminum silicate catalyst, and belongs to the field of water treatment. The preparation method comprises the following steps of: titrating alkali metal silicate aqueous solution in aluminum salt solution for copolymerization; keeping standing for a period of time after complete reaction; and activating and drying precipitate to obtain the needed catalyst. The preparation method is characterized in that under a certain temperature and mechanical stirring strength, reaction is carried out according to a certain stoichiometric ratio and dosing sequence; and after the reaction, white solid powder of the poly-aluminum silicate is obtained by activating, washing, drying and other procedures. The preparation method has the advantages of simple process and low requirement for reaction conditions; and the obtained product has the advantages of high efficiency, excellent stability and long service life, and is applicable to industrial production.

Description

technical field [0001] The invention belongs to the field of water treatment. Background technique [0002] In recent years, with the rapid development of my country's industrialization and the substantial improvement of the economic level, the production and use of different forms of chemical substances are increasing, resulting in a significant increase in the types and quantities of pollutants in water sources, and aggravating the pollution of the water environment. Trace amounts of toxic and refractory organic pollutants in water bodies have attracted more and more attention because of their harmful effects, toxicological characteristics, pollution degree and trend. The conventional water treatment process (coagulation-sedimentation-filtration-disinfection) is mainly to remove suspended and colloidal pollutants in water, and the removal effect on refractory organic pollutants is very poor, or even powerless. In order to significantly improve water quality and ensure wat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J21/06B01J35/00
Inventor 陈忠林刘宇刘玥
Owner HARBIN INST OF TECH