Cordierite with silicon-titanium oxide grown on its surface and preparation method thereof
A surface growth and cordierite technology, applied in chemical instruments and methods, chemical/physical processes, catalyst supports, etc., can solve the problems of small specific surface area and poor treatment effect of cordierite supports, and achieve increased binding force and specific surface area , the effect of a wide range of application prospects
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Embodiment 1
[0022] Put the cut cordierite into the polytetrafluoroethylene lining of the autoclave, add 5% hydrochloric acid solution to the lining to completely immerse the cordierite, seal the autoclave and place it in an oven at 250°C for 2 hours of hydrothermal treatment . After the hydrothermal treatment, the cordierite carrier was washed with distilled water until the washing liquid was neutral, and the distilled water on the surface was blown off with an air compressor, dried at 120°C for 8 hours, and calcined at 550°C for 3 hours to obtain a silicon-titanium oxide content of 2.8wt%. The properties of the product A1 are shown in Table 1.
Embodiment 2
[0024] Same as Example 1, except that 15% nitric acid solution was used instead for hydrothermal treatment at 100°C for 3 hours to obtain product A2 with a silicon-titanium oxide content of 0.5wt%, and its properties are shown in Table 1.
Embodiment 3
[0026] Same as Example 1, except that 20% mixed acid solution of nitric acid and hydrochloric acid (the mass ratio of nitric acid and hydrochloric acid is 1:1) was used for hydrothermal treatment at 150°C for 0.5 hours to obtain a product with a silicon titanium oxide content of 0.8wt%. A3, see Table 1 for properties.
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