A catalyst for propane dehydrogenation to propylene, its preparation method and application
A technology for propane dehydrogenation and catalyst, applied in the direction of catalyst, catalyst carrier, carbon compound catalyst, etc., can solve the problem of fast decay of activity, and achieve the effect of prolonging life, good mechanical performance and good stability
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Embodiment 1
[0039] Preparation of Al-Si-C-O composite carrier material: Take 1 weight part of phenolic resin and dissolve it in 4 weight parts of absolute ethanol. After 0.06 parts by weight of oxalic acid and 0.05 parts by weight of hydrochloric acid, hydrolyze for 30 hours at room temperature to obtain a carbon-silicon binary sol; Gel, the gel was dried at 90°C for 18 hours to obtain a dry gel, and the dry gel and 16 parts by weight of pseudo-boehmite were ball-milled with a ball mill for 18 hours; 2 Under the atmosphere, the temperature was raised to 1300°C at a heating rate of 5°C / min, and after 13 hours of reaction, it was cooled to room temperature; then the reacted product was oxidized in air at 700°C for 4 hours, washed with nitric acid and hydrofluoric acid in turn, and then washed with Al-Si-C-O composite carrier material can be obtained by washing, filtering and drying;
[0040] Preparation of spherical carrier: Add the Al-Si-C-O composite carrier material to the aqueous solut...
Embodiment 2
[0045] Preparation of Al-Si-C-O composite carrier material: Take 1 weight part of phenolic resin and dissolve it in 4 weight parts of absolute ethanol. After 0.08 parts by weight of oxalic acid and 0.04 parts by weight of hydrochloric acid, hydrolyze at room temperature for 25 hours to obtain a carbon-silicon binary sol; Gel, the gel was dried at 80°C for 23 hours to obtain a dry gel, and the dry gel and 14 parts by weight of pseudo-boehmite were ball-milled for 15 hours with a ball mill; 2 Under the atmosphere, the temperature was raised to 1350°C at a heating rate of 8°C / min, and after 23 hours of reaction, it was cooled to room temperature; then the reacted product was oxidized in air at 650°C for 3 hours, washed with nitric acid and hydrofluoric acid in turn, and then washed with Al-Si-C-O composite carrier material can be obtained by washing, filtering and drying;
[0046] Preparation of spherical carrier: Add the Al-Si-C-O composite carrier material into the sodium algi...
Embodiment 3
[0050] Preparation of Al-Si-C-O composite carrier material: Preparation of Al-Si-C-O composite carrier material: get 1 weight part of phenolic resin, dissolve it in 4 weight parts of absolute ethanol, and under stirring condition, mix 7 weight parts After adding 0.03 parts by weight of oxalic acid and 0.07 parts by weight of hydrochloric acid, hydrolyze for 35 hours at room temperature to obtain a carbon-silicon binary sol; then add 0.35 parts by weight of The gelling agent hexamethylenetetramine was used to obtain a gel, and the gel was dried at 100°C for 10 hours to obtain a xerogel, and the xerogel and 18 parts by weight of pseudo-boehmite were ball-milled for 120 hours with a ball mill; The material after ball milling is in N 2 Under the atmosphere, the temperature was raised to 1250°C at a heating rate of 3°C / min, and after 8 hours of reaction, it was cooled to room temperature; then the reacted product was oxidized in air at 750°C for 6 hours, washed with nitric acid and...
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