Aromatization method
An aromatization and structural formula technology, applied in the field of aromatization, can solve problems such as the inevitable generation of olefin species and catalyst deactivation
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Embodiment 1
[0049] Weigh 35 grams of ZSM-5 with a silicon-aluminum ratio of 25 and mix them with 35 grams of γ-alumina, add 2.7 grams of scallop powder, and mix well. Then add 48 grams of nitric acid aqueous solution with a mass percentage of nitric acid of 5.5%, knead and shape, and extrude. The obtained catalyst precursor was dried at 120°C for 8 hours, calcined at 500°C for 2 hours, and impregnated with Zn(NO 3 ) 2 , the added amount of Zn is 1%, and the molecular sieve catalyst is obtained by roasting after drying.
[0050] Weigh 60 grams of corn stalks, place in an autoclave and add 700 grams of water, then add a 5mol / L sulfuric acid solution with 7% water quality, heat up to 200°C and react for 45 minutes, then cool, and the cooled reaction solution Filtrate to obtain filter cake and filtrate, the filtrate is the hydrolyzate of cellulose, after the reaction, the mass spectrometry is used to identify the reaction result. The main product is levulinic acid, and its production amount...
Embodiment 2
[0053] Weigh 35 grams of ZSM-5 with a silicon-aluminum ratio of 50 and mix them with 35 grams of pseudo-boehmite, add 2.7 grams of celadon powder, and mix well. Then add 48 grams of nitric acid aqueous solution with a mass percentage of nitric acid of 5.5%, knead and shape, and extrude. The obtained catalyst precursor was dried at 120°C for 8 hours, calcined at 500°C for 2 hours, and impregnated with Cu(NO 3 ) 2 , the amount of Cu added is 2%, and the molecular sieve catalyst C2 is obtained by roasting after drying.
[0054] Catalyst activity evaluation is carried out on a fixed bed, the reaction conditions catalyst mass is 3 grams, the reaction substrate is levulinic acid+water (50 / 50), and the weight space velocity is 1.0 hours -1 , hydrogen pressure 1.0MPa, flow 50ml min -1 , temperature 420°C. After completion of the reaction, the conversion rate of levulinic acid was 99%, and T60 was 1372 hours.
Embodiment 3
[0056]Weigh 30 grams of wood, put it in an autoclave and add 300 grams of ethanol, then add a 5mol / L sulfuric acid solution with 7% water quality, heat up to 200°C and react for 30 minutes, then cool, and filter the cooled reaction solution , to obtain a filter cake and a filtrate, the filtrate is a hydrolyzate of cellulose, after the reaction, the mass spectrometry is used to identify the reaction result. The main product is levulinic acid, and its production amount is 10.5 grams.
[0057] Weigh 35 grams of ZSM-5 with a silicon-aluminum ratio of 150 and mix them with 35 grams of pseudo-boehmite, add 2.7 grams of safflower powder, and mix well. Adding nitric acid mass percentage content afterwards is 48 grams of nitric acid aqueous solution of 5.5%, kneading molding, adding Ga(NO 3 ) 2 , the amount of Ga added is 1% by molecular sieve mass, extruded. The obtained catalyst precursor was dried at 120° C. for 8 hours, and calcined at 500° C. for 2 hours to obtain molecular siev...
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