Preparation method and application of mesoporous magnesium silicate
A magnesium silicate and mesoporous technology, which is applied in the field of preparation of mesoporous magnesium silicate, can solve the problems of poor sulfate resistance, cumbersome process, and high preparation cost, and achieve the advantages of large-scale production, high catalytic conversion rate, The effect of simple preparation process
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Embodiment 1
[0021] Weigh 6 g of magnesium sulfate and dissolve it in 17 ml of deionized water, stir to dissolve, filter and take its clear solution to obtain a magnesium sulfate solution. Weigh 5 g of sodium silicate and dissolve it in 13 ml of deionized water, stir to dissolve, filter and take the clear solution to obtain sodium silicate solution. Add the prepared sodium silicate solution dropwise into the prepared magnesium sulfate solution. 30 wt% sodium hydroxide solution was added dropwise until the pH of the system was 8. The obtained mixed system was transferred into a flask and kept in an oil bath at 90°C for 3 hours. After the mixed system was cooled, it was washed with a large amount of hot water and filtered. The obtained product was dried in an oven at 120° C. for 24 hours. The product is recorded as magnesium silicate-1, and the specific surface area of the catalyst is 361 m 2 / g.
Embodiment 2
[0023] Weigh 7 g of magnesium sulfate and dissolve it in 17 ml of deionized water, stir to dissolve, filter and take its clear solution to obtain a magnesium sulfate solution. Weigh 5 g of sodium silicate and dissolve it in 13 ml of deionized water, stir to dissolve, filter and take the clear solution to obtain sodium silicate solution. Add the prepared sodium silicate solution dropwise into the prepared magnesium sulfate solution. 30 wt% sodium hydroxide solution was added dropwise until the pH of the system was 13. The obtained mixed system was transferred into a flask and kept in an oil bath at 120° C. for 5 hours. After the mixed system was cooled, it was washed with a large amount of hot water and filtered. The obtained product was dried in an oven at 120° C. for 24 hours. The product is recorded as magnesium silicate-2, and the specific surface area of the catalyst is 535 m 2 / g.
Embodiment 3
[0025] Weigh 10 g of magnesium sulfate and dissolve it in 17 ml of deionized water, stir to dissolve, filter and take its clear solution to obtain a magnesium sulfate solution. Weigh 5 g of sodium silicate and dissolve it in 13 ml of deionized water, stir to dissolve, filter and take the clear solution to obtain sodium silicate solution. Add the prepared sodium silicate solution dropwise into the prepared magnesium sulfate solution. 30 wt% potassium hydroxide solution was added dropwise until the pH of the system was 14. The obtained mixed system was transferred into a flask and kept in an oil bath at 100° C. for 5 hours. After the mixed system was cooled, it was washed with a large amount of hot water and filtered. The obtained product was dried in an oven at 120° C. for 24 hours. The product is recorded as magnesium silicate-3, and the specific surface area of the catalyst is 599 m 2 / g.
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