Supported catalyst, preparation method and application thereof, and method for producing propylene from propane dehydrogenation
A supported catalyst and catalyst technology, applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of uneven dispersion of active metal components, complex preparation process, etc., and achieve catalyst stability. Good, simple preparation process, easy control of conditions
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[0026] According to a preferred embodiment of the present invention, the process of mixing and contacting comprises: (1) mixing cetyl trimethyl ammonium bromide (CTAB), polyethylene glycol octyl phenyl ether (Triton X -100) and hydrochloric acid were stirred at 25-60°C until dissolved; (2) the solution obtained in step (1) and silicate ester were stirred at 25-60°C for 10-72 hours, and allowed to stand for 10-72 hours.
[0027] In the present invention, the preparation method of the carrier preferably further includes washing and drying processes after the filtration. The washing and drying processes can be conventional choices in the field, and are not repeated here.
[0028] In the present invention, the template agent can be removed by washing and / or calcination. The washing can be water washing and / or alcohol washing, and the conditions for washing and removing the template agent include: the temperature can be 90-120° C., and the time can be 10-40 hours. According to a ...
Embodiment 1
[0059] This example is used to illustrate the supported catalyst provided by the present invention and its preparation method and the method for producing propylene by dehydrogenation of propane
[0060] (1) Preparation of the carrier
[0061] 1.5 grams of CTAB (hexadecyltrimethylammonium bromide) and 1.5 ml of polyethylene glycol octyl phenyl ether (Triton-X100) were added to 29.6 grams of 37% by weight concentrated hydrochloric acid and 75 grams In hydrochloric acid composed of water, mix and stir at 40°C until CTAB is completely dissolved; then add 4.35 grams of ethyl orthosilicate to the above solution, stir at 40°C for 15 minutes, and stand at 40°C for 24 hours. Then filter, wash and dry to obtain the original powder mesoporous material. The above-mentioned raw powder mesoporous material was calcined at 600° C. for 24 hours to remove the template agent to obtain spherical mesoporous material A1.
[0062] The spherical mesoporous material A-1 was characterized by X-ray d...
Embodiment 2
[0073] This example is used to illustrate the supported catalyst provided by the present invention and its preparation method and the method for producing propylene by dehydrogenation of propane
[0074] (1) Preparation of the carrier
[0075] 1.125 grams of CTAB (hexadecyltrimethylammonium bromide) and 3.75 ml of polyethylene glycol octyl phenyl ether (Triton-X100) were added to 20.6 grams of 37 wt% concentrated hydrochloric acid and 62.2 grams In hydrochloric acid composed of water, mix and stir at 40 °C until CTAB is completely dissolved; then add 4.35 grams of ethyl orthosilicate to the above solution, stir at 40 °C for 15 minutes to dissolve, and then stand at 40 °C for 24 Hour. Then filter, wash and dry to obtain the original powder mesoporous material. The above-mentioned raw powder mesoporous material was washed with ethanol under the condition of refluxing at 100° C. for 24 hours, and the template agent was removed to obtain spherical mesoporous material A2.
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