Catalyst for hydrogenating cis-butenedioic anhydride to prepare butanedioic anhydride and its prepn and application
A technology for preparing succinic anhydride and catalyst, which is applied in the direction of carboxylic anhydride preparation, metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, etc., which can solve the difficulty and high price of Ru-P complex synthesis , Ru-P complex solvent is difficult to separate and other problems, to achieve the effect of high activity and selectivity, easy separation, high space-time yield
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Embodiment 1
[0019] Take the Ni(NO 3 ) 2 Solution 6.4ml 30ml tetraethyl orthosilicate, 15ml acetic acid, 75ml ethanol, 1.3ml water, stir evenly, heat at 80°C to form a gel, dry in an oven at 100-120°C, and stir intermittently, place in a muffle furnace at 400°C Roasting at ℃ for 3 hours, naturally down to room temperature, under hydrogen flow (hydrogen volume space velocity 300-500h -1 ) at 580°C for 3 hours, and naturally cooled to room temperature, the catalyst was uniformly dark black.
Embodiment 2
[0021] Take Ni(NO 3 ) 2 .6H 2 O 17g of ethyl orthosilicate 30ml, 15ml of acetic acid dissolved in 75ml of ethanol, add 1.4ml of water and stir evenly, heat at 80°C to form a gel, dry in an oven at 100-120°C, and stir intermittently, place in a muffle furnace at 500°C Roasting at ℃ for 3 hours, naturally down to room temperature, under hydrogen flow (hydrogen volume space velocity 300-500h -1 ) at 400° C. for 3 hours, and naturally cooled to room temperature to take out the catalyst, which was uniformly dark black.
Embodiment 3
[0023] Take Ni(NO 3 ) 2 .6H 2 O 10g of tetraethyl orthosilicate 30ml, dissolved in 75ml of ethanol, add 15ml of acetic acid, 4ml of water, stir evenly, heat at 80°C to form a gel, dry in an oven at 100-120°C, and stir intermittently, place in a muffle furnace Roast at 400°C for 3 hours, then cool down to room temperature naturally, under hydrogen flow (hydrogen volume space velocity 300-500h -1 ) at 400° C. for 3 hours, and naturally cooled to room temperature to take out the catalyst, which was uniformly dark black.
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