Spherical mesoporous composite material and preparation method thereof and catalyst and preparation method and application thereof
A composite material and mesoporous technology, which is applied in the field of catalyst and its preparation, spherical mesoporous composite material and its preparation, can solve the problems of low propane conversion rate and easy deactivation, achieve stable spherical particle structure, avoid agglomeration, The effect of mesostructure stabilization
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[0037] According to a preferred embodiment, the method also includes, in step (1), preparing the component a by a method comprising the following steps:
[0038] In the presence of water, the template agent, the acid agent and the silicon source are first mixed and contacted, and the resulting mixture is crystallized and filtered in sequence.
[0039] Preferably, the templating agent is cetyltrimethylammonium bromide (CTMAB) and / or polyethylene glycol octylphenyl ether (Triton-X100).
[0040] Particularly preferably, the templating agent is cetyltrimethylammonium bromide and polyethylene glycol octylphenyl ether.
[0041] Preferably, the acid agent is hydrochloric acid. There is no particular requirement on the concentration of the hydrochloric acid, for example, it may be 0.1 to 37% by weight. Preferably, the amount of hydrochloric acid is such that the molar ratio of hydrogen chloride to silicon source is (5-50):1.
[0042] Preferably, the silicon source is at least one o...
preparation example 1
[0090] Preparation Example 1: Preparation of Spherical Mesoporous Composite Material C1
[0091] (1) Add CTMAB (4.12mmol) and Triton-X100 (2.46mmol) to hydrochloric acid solution (29.6 grams of 37% concentrated hydrochloric acid and 75 grams of water), mix and stir at 40°C until CTMAB is completely dissolved ; Then tetraethyl orthosilicate (20.91mmol) was added to the above solution, stirred at 40°C for 15h, then stood at 40°C for 24h; the resulting solution was transferred to a polytetrafluoroethylene-lined reactor, After crystallization at 50° C. for 24 hours, filter cake a1 (water content: 5% by weight) containing mesoporous molecular sieves was obtained through filtration and washing.
[0092] (2) 10g water glass (concentration is 15% by weight), 2g sulfuric acid solution (concentration is 12% by weight) and 2g glycerol are mixed, and contact reaction 1.5h at 30 ℃, then use concentration is 98% by weight Sulfuric acid was used to adjust the pH to 3, and then the obtained ...
preparation example 2
[0117] Preparation Example 2: Preparation of Spherical Mesoporous Composite C2
[0118] (1) Add CTMAB (5.50mmol) and Triton-X100 (3.02mmol) to hydrochloric acid solution (29.6 grams of 37% concentrated hydrochloric acid and 90 grams of water), mix and stir at 25°C until CTMAB is completely dissolved ; Then tetraethyl orthosilicate (20.91mmol) was added to the above solution, stirred at 50°C for 15h, and then stood at 50°C for 20h; the resulting solution was transferred to a polytetrafluoroethylene-lined reactor, After crystallization at 60° C. for 20 h, filter and wash to obtain a filter cake a1 containing mesoporous molecular sieves (water content: 6% by weight).
[0119] (2) 20g water glass (concentration is 15% by weight), 2g sulfuric acid solution (concentration is 12% by weight) and 2g glycerol are mixed, and contact reaction 1.5h at 30 ℃, then with concentration is 98% by weight Sulfuric acid was used to adjust the pH to 4, and then the obtained reaction material was su...
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