Catalyst for reaction for preparing 1,3-butadiene from ethanol, preparation and applications thereof
A catalyst and butadiene technology, applied in the direction of catalysts, molecular sieve catalysts, carbon compound catalysts, etc., can solve the problem of less impact, and achieve the effects of favorable utilization, excellent reaction performance, and inhibition of side reactions
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[0026] Example 1
[0027] 1. Preparation of 1Na-3Zn-10Hf-MFI catalyst
[0028] (1) In the mixed solution of ethyl orthosilicate and water, add 25wt% tetrabutylammonium hydroxide aqueous solution dropwise, stir for 12h to obtain a molar composition of 1.0 ethyl orthosilicate: 3.0 tetrabutylammonium hydroxide: 10-100 water Gel
[0029] (2) Put the obtained gel into a stainless steel hydrothermal kettle and crystallize at 100°C for 6 days;
[0030] (3) Centrifuging the obtained white powder, drying at 80°C for 12 hours, and calcining at 600°C for 5 hours to obtain an MFI molecular sieve with a nanosheet structure.
[0031] (4) Put Na 2 CO 3 , Zn(NO 3 ) 2 6H 2 O and HfCl 4 Dissolved in water, immersed in the same volume with the above-mentioned nanosheet MFI molecular sieve, and dried in an oven at 80°C.
[0032] (5) The sample in step 4 is calcined at 550°C for 4 hours to obtain the nanosheet molecular sieve catalyst 1Na-3Zn-10Hf-MFI.
[0033] The results of scanning electron microscope an...
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[0040] Example 2
[0041] The difference between Example 2 and Example 1 is that the prepared catalyst is a microporous molecular sieve catalyst 1Na-3Zn-10Hf-MFI, and other reaction conditions are the same as Example 1. The specific experimental results are shown in Table 1.
[0042] The preparation method of the microporous molecular sieve catalyst 1Na-3Zn-10Hf-MFI is as follows: 4 Dissolve in water, add ethyl orthosilicate dropwise to the above solution under stirring conditions, stir for 3h, then add 25wt% tetrapropylammonium hydroxide aqueous solution dropwise and stir for 12h; load the resulting gel In a stainless steel hydrothermal kettle, crystallize at 160°C for 3 days; centrifuge the obtained white powder, dry, and calcinate at 600°C for 4 hours to obtain MFI molecular sieves containing Hf; 2 CO 3 , Zn(NO 3 ) 2 6H 2 O is dissolved in water, immersed in equal volume with the above-mentioned Hf-containing MFI molecular sieve, dried, and calcined at 550°C for 4 hours to obta...
Example Embodiment
[0046] Example 3
[0047] The difference between Example 3 and Example 1 is that the prepared catalyst is a nanosheet molecular sieve catalyst 1Li-3Zn-10Y-MFI, and other reaction conditions are the same as Example 1. The specific experimental results are shown in Table 2.
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