High-efficiency dehydrogenation catalyst and application thereof in preparation of pyridine by dehydrogenation of piperidine raw materials
A dehydrogenation catalyst and catalyst technology, applied in the direction of molecular sieve catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of short service life of catalysts, achieve less metal loading, reduce usage, and reduce active groups The effect of points loss
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Embodiment 1
[0033] A preparation method of an efficient dehydrogenation catalyst, the steps are as follows:
[0034] Weigh 0.295g of copper nitrate into 500g of water, stir to dissolve.
[0035] Weigh 0.995g of ammonia palladium chloride and dissolve it in 500g of water, heat and stir to dissolve.
[0036] Take 100g with a diameter of 2mm and a hole volume of 1cm 3 / g, the aperture is in Specific surface area 300m 2 / g SBA-15 mesoporous molecular sieve was placed in the chromatography column, 100 g of the above-mentioned auxiliary solution was added to it, the remaining auxiliary solution was slowly injected into the chromatography column, the lower part was discharged, and the cycle was turned on for 6 hours. 2 Purge, dry at 120°C for 8h, take out and soak in 100g of 20% ammonia water for 3h, and then place the carrier in a chromatographic column with N 2 Purge.
[0037] Pour 100g of active solution into the chromatographic column to soak the carrier, inject the remaining active so...
Embodiment 2
[0039]A preparation method of an efficient dehydrogenation catalyst, the steps are as follows:
[0040] Replace the carrier in Example 1 with a diameter of 2mm and a pore volume of 1cm 3 / g, the aperture is in Specific surface area 300m 2 / g of TS-1 molecular sieve.
[0041] The remaining reagents and operations were carried out in the same manner as in Example 1, and the obtained catalyst composition was a TS-1 dehydrogenation catalyst with 0.5% Pd+0.1% Cu, which was denoted as catalyst 2.
Embodiment 3
[0043] A preparation method of an efficient dehydrogenation catalyst, the steps are as follows:
[0044] The carrier of Example 2 was used, and the active component precursor was changed to 1.14 g of ammonium chloroplatinate. 1 Dehydrogenation catalyst, denoted as catalyst 3.
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