A kind of magnesium silicate material and its preparation method and application
A solution technology of magnesium silicate and sodium silicate, which is applied in the direction of magnesium silicate, silicate, nanotechnology, etc., and can solve problems such as complex process, harsh reaction conditions, and high production cost
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
preparation example Construction
[0029] The invention provides a kind of preparation method of magnesium silicate material, comprises the following steps:
[0030] (1) Mix silicon-containing solid waste, sodium hydroxide and water, and carry out an alkali dissolution reaction to obtain a sodium silicate solution;
[0031] (2) In the sodium silicate solution, carbon dioxide is introduced to carry out a double decomposition reaction to obtain silicon dioxide;
[0032] (3) Mix the silicon dioxide, magnesium oxide and sodium hydroxide solution, and carry out a hydrothermal reaction to obtain a magnesium silicate material;
[0033] The temperature of the alkali dissolution reaction is 80-110° C., and the time is 4-8 hours;
[0034] The temperature of the metathesis reaction is 50-70°C, and the time is 0.5-1.5h;
[0035] The temperature of the hydrothermal reaction is 200-260° C., and the time is 4-8 hours.
[0036] In the present invention, unless otherwise specified, all raw material components are commerciall...
Embodiment 1
[0061] Pass 343g of fly ash with a silicon dioxide content of 53.6wt% through a 300-mesh sieve after mechanical activation to obtain fly ash powder; add 343g of fly ash powder, 240g of sodium hydroxide and 1L of water into the reactor and mix well , reacted with alkali solution at 100°C for 6 hours, filtered with suction, washed the obtained solid product, and the obtained filtrate was sodium silicate solution;
[0062] Under the conditions of heating and stirring in a water bath at 60°C, continue to feed carbon dioxide gas into the 200mL sodium silicate solution until the turbidity of the solution no longer increases, filter with suction, and wash the obtained solid product with 10wt% hydrochloric acid solution until no bubbles are generated, and then Wash with distilled water boiled and cooled to 60°C, and dry at 150°C for 1.5h to obtain silica;
[0063] Mix 0.5g of magnesium oxide, 1.5g of silicon dioxide and 70mL of 0.14moL / L sodium hydroxide solution evenly, react at 250°...
Embodiment 2
[0066] Mechanically activate silica fume with a silica content of 78.04wt% and pass through a 300-mesh sieve to obtain microsilica fine powder; add 1000g microsilica fine powder, 107g sodium hydroxide and 1.3L water into the reaction kettle Mix well, react with alkali solution at 120°C for 6 hours, filter with suction, wash the obtained solid product, and the obtained filtrate is sodium silicate solution;
[0067] Under the conditions of heating and stirring in a water bath at 60°C, continue to feed carbon dioxide gas into the 200mL sodium silicate solution until the turbidity of the solution no longer increases, filter with suction, and wash the obtained solid product with 10wt% hydrochloric acid solution until no bubbles are generated, and then Wash with distilled water boiled and cooled to 60°C, and dry at 150°C for 1.5h to obtain silica;
[0068] Mix 1.5g of magnesium oxide, 1.5g of silicon dioxide and 70mL of 0.23moL / L sodium hydroxide solution evenly, react at 225°C for ...
PUM
| Property | Measurement | Unit |
|---|---|---|
| pore size | aaaaa | aaaaa |
| specific surface area | aaaaa | aaaaa |
| particle size | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More