Method for preparing porous magnesium silicate by using ball milling method and prepared magnesium silicate

A technology of magnesium silicate and ball milling method, which is applied in the direction of magnesium silicate, silicate, chemical instruments and methods, etc., can solve the problems such as difficult large-scale processing, and achieve energy saving and environmental protection of the preparation method, improved performance, and large pore structure Effect

Inactive Publication Date: 2021-07-16
BEIJING UNIV OF CHEM TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Patent CN201410155074.2 discloses a preparation method of magnesium silicate / carbon composite material. The soluble magnesium salt solution is dropped into the sodium silicate solution and stirred evenly to obtain magnesium silicate gel; under stirring conditions, the carbon source Drop the solution into the magnesium silicate gel to prepare the magnesium silicate / carbon mixed solution; place the magnesium silicate / carbon mixed solution at 150-250°C for 40-72 hours in closed reaction to obtain the magnesium silicate / carbon composite gel Glue; the magnesium silicate / carbon composite gel is suction-filtered, centrifuged or press-filtered, washed, dried, and ground to obtain the final product. However, the existing magnesium silicate preparation process needs to dissolve the raw materials and simultaneously heat up , not easy to process on a large scale

Method used

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  • Method for preparing porous magnesium silicate by using ball milling method and prepared magnesium silicate
  • Method for preparing porous magnesium silicate by using ball milling method and prepared magnesium silicate
  • Method for preparing porous magnesium silicate by using ball milling method and prepared magnesium silicate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] A kind of method utilizing ball milling method to prepare porous magnesium silicate, comprises the following steps:

[0054] (1) Weigh 63g of MgNO 3 ·6H 2 O solid and 86.26 g of Na 2 SiO 3 9H 2 O solid, after mixing, pour in the agate ball mill jar;

[0055] (2) put 400g agate balls into the agate ball mill jar of step (1), and mix evenly, wherein the mass of small balls accounts for 30% in the agate balls, the mass of large balls accounts for 20%, the mass of medium balls accounts for 50%, and the remaining three The treatment of the agate ball mill jar is the same; the diameter of the ball in it is D 小 ≤0.5cm, 0.5cm中 大 ≥1cm;

[0056] (3) Cover the agate ball mill jar with a lid, and place it on a ball mill for ball milling, the regulating speed is 100rpm, and the ball milling time is 4h;

[0057] (4) take out the product after ball milling, put into 60 ℃ oven and dry;

[0058] (5) Put the sample dried in step (4) into a powder machine for powder grinding, add ...

Embodiment 2

[0069] A kind of method utilizing ball milling method to prepare porous magnesium silicate, comprises the following steps:

[0070] (1) Weigh 52g of MgCl 2 ·6H 2 O solid and 71.62 g of Na 2 SiO 3 9H 2 O solid, after mixing, pour in the agate ball mill jar;

[0071] (2) put 400g agate balls into the agate ball mill jar of step (1), and mix evenly, wherein the small ball mass accounts for 30% in the agate ball, the large ball mass accounts for 20%, and the medium ball mass accounts for 50%; the remaining three Agate ball mill jars are treated the same; where D 小 ≤0.5cm, 0.5cm中 大 ≥1cm;

[0072] (3) Cover the agate ball mill jar with a lid, and place it on a ball mill for ball milling, the adjusting rotating speed is 200rpm, and the ball milling time is 3h;

[0073] (4) take out the product after ball milling, put into 60 ℃ oven and dry;

[0074] (5) Put the sample dried in step (4) into a powder machine for powder grinding, add deionized water to the sample after powder g...

Embodiment 3

[0086] A kind of method utilizing ball milling method to prepare porous magnesium silicate, comprises the following steps:

[0087] (1) Weigh 60g of MgSO 4 ·7H 2 O solid and 86.26 g of Na 2 SiO 3 9H 2 O solid, after mixing, pour in the agate ball mill jar;

[0088] (2) put 300g agate balls into the agate ball mill jar of step (1), and mix evenly, wherein the small ball mass accounts for 30% in the agate ball, the large ball mass accounts for 20%, and the medium ball mass accounts for 50%; the remaining three Agate ball mill jars are treated the same; where D 小 ≤0.5cm, 0.5cm中 大 ≥1cm;

[0089] (3) Cover the agate ball mill jar with a lid, and place it on the ball mill for ball milling, the adjusting rotating speed is 250rpm, and the ball milling time is 3.5h;

[0090] (4) take out the product after ball milling, put into 60 ℃ oven and dry;

[0091] (5) Put the sample dried in step (4) into a powder machine for powder grinding, add deionized water to the sample after powd...

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Abstract

The invention discloses a method for preparing porous magnesium silicate by using a ball milling method, and relates to the technical field of inorganic functional material preparation, raw materials are mixed for reaction by using a ball mill, and a porous magnesium silicate powder material is obtained after centrifugal drying. The invention also provides magnesium silicate prepared by the preparation method. The preparation method has the beneficial effects that the obtained magnesium silicate is in a sheet shape of about 200 nm, the specific surface area reaches 800m<2>.G<-1>, and the magnesium silicate has the excellent characteristics of relatively large pore structure, relatively large specific surface area, charge on the surface and the like. The adsorption rate of Cu<2+> can reach 80% or above, and the maximum adsorption capacity can reach 223.05 mg/g. The maximum adsorption capacity of methylene blue can reach 300 mg/g. The preparation process does not need any solvent, does not need heating treatment, is energy-saving and environment-friendly, is easy for large-scale application and large-scale industrial production, and has a wide application prospect in the aspect of sewage treatment.

Description

technical field [0001] The invention relates to the technical field of preparation of inorganic functional materials, in particular to a method for preparing porous magnesium silicate by using a ball milling method and the prepared magnesium silicate. Background technique [0002] Water pollution is one of the urgent problems encountered in the development of today's society, and the harmful organic dyes and toxic heavy metal ions discharged by industry are the most important part of water pollution treatment, which directly threatens human production, life and health. The development of efficient and feasible sewage treatment technology is a major problem to be solved urgently in today's society. [0003] At present, the most important sewage treatment methods are physical adsorption, biodegradation and chemical methods. Among these methods, physical adsorption is the most economical and practical method. The key to this method is to develop an efficient and cheap adsorpt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/22C02F1/28C02F101/20C02F101/38
CPCC01B33/22C02F1/281C02F2101/20C02F2101/308C02F2101/38C01P2006/12
Inventor 冯拥军李彧奇李殿卿汪杰
Owner BEIJING UNIV OF CHEM TECH
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