Solid base catalyst as well as preparation and application thereof
A solid base catalyst, a technology for preparation steps, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve problems such as easy loss of active components
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Embodiment 1
[0035] Weigh 35.7g Zn(NO 3 ) 2 ·6H 2 O, 90.4g Al(NO 3 ) 3 9H 2 O and 2.17g La(NO 3 ) 3 ·6H 2 O was dissolved in 200ml of deionized water to form a mixed solution. Pre-add 250ml of deionized water to the reactor, and use 4mol / L Na 2 CO 3The lye mixed with NaOH and the above metal salt mixed solution are co-precipitated in parallel. The pH value of coprecipitation is 8.5, and temperature is 20 ℃, and dropwise time is 25min. After the solution was added dropwise, the stirring was continued for one hour, and the resulting mother liquor was aged at 80° C. for 8 hours and then filtered and washed. The filter cake was dried at 120°C, crushed into 10-40 meshes, and then calcined at 700°C for 2 hours to obtain the catalyst.
Embodiment 2
[0037] Weigh 16.36g ZnCl 2 , 112.54g Al(NO 3 ) 3 9H 2 O and 2.17g La(NO 3 ) 3 ·6H 2 O was dissolved in 250ml of deionized water to form a mixed solution. Pre-add 250ml of deionized water to the reactor, and use 4.0mol / L Na 2 CO 3 The lye and the metal salt mixed solution are co-currently co-precipitated. The pH value of the co-precipitation is 9.0, the temperature is 15°C, and the dropping time is 25min. After the solution was added dropwise, the stirring was continued for one hour, and the resulting mother liquor was aged at 60° C. for 24 hours and then filtered and washed. After the filter cake was dried at 120°C, it was crushed into 10-40 meshes, and then calcined at 600°C for 3 hours to obtain the catalyst.
Embodiment 3
[0039] Weigh 26.34g C 4 h 6 o 4 Zn·2H 2 O, 67.52g Al(NO 3 ) 3 9H 2 O and 0.67 g LaCl 3 ·7H 2 O was dissolved in 600ml of deionized water to form a mixed solution. Pre-add 300ml of deionized water into the reactor, and use 4.5mol / L NaOH lye and the above metal salt mixed solution to carry out co-current co-precipitation. The pH value of the co-precipitation is 9.5, the temperature is 25 ° C, and the dropping time is 75 min. After the solution was added dropwise, the stirring was continued for one hour, and the resulting mother liquor was aged at 80° C. for 24 hours and then filtered and washed. After the filter cake was dried at 120°C, it was crushed into 10-40 meshes, and then calcined at 800°C for 4 hours to obtain the catalyst.
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Abstract
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