Method for preparing resorcinol by using isomerization of catechol
A technology of resorcinol and isomerization, applied in the field of preparing resorcinol, can solve the problems of equipment corrosion, large equipment investment, long production process, etc., and achieves mild reaction conditions, less three waste discharge and high degree of automation Effect
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Embodiment 1
[0025] 100 grams of mordenite molecular sieves (purchased from Nankai Catalyst Factory, with a silicon-aluminum ratio of 5) were ion-exchanged with 500 milliliters of 1 mole per liter of ammonium nitrate. Each exchange was carried out for 4 hours, the solution temperature was 90° C., and the number of exchanges was 4 times. Then dry at 120°C and bake at 550°C for 3 hours. Mix the ion-exchanged molecular sieve, pseudo-boehmite, and kale powder evenly (molecular sieve: pseudo-boehmite: kale powder = 35:15:2). Then add a nitric acid solution with a concentration of 8wt% and knead it into shape. The extruded catalyst carrier was dried in the shade at room temperature for 12 hours, then dried at 120°C for 5 hours, and calcined at 550°C for 3 hours. Take 10 grams of the calcined catalyst carrier and add it to 30 mL of an aqueous solution containing 0.2 wt% Pt, the immersion time is 12 hours, and the immersion temperature is 50°C. Then, dry at 120° C. for 4 hours, and roast at 550...
Embodiment 2
[0030] 100 grams of ZSM-5 (purchased from Nankai Catalyst Factory, with a silicon-to-aluminum ratio of 38) zeolite molecular sieve was ion-exchanged with 500 milliliters of ammonium nitrate of 1 mole per liter. Each exchange was carried out for 4 hours, the solution temperature was 90° C., and the number of exchanges was 4 times. Then dry at 120°C and bake at 550°C for 3 hours. Mix the ion-exchanged molecular sieve, pseudo-boehmite, and kale powder evenly (molecular sieve: pseudo-boehmite: kale powder = 35:15:2). Then add a nitric acid solution with a concentration of 8wt% and knead it into shape. The extruded catalyst carrier was dried in the shade at room temperature for 12 hours, then dried at 120°C for 5 hours, and calcined at 550°C for 3 hours. Take 10 grams of the calcined catalyst carrier and add it to 30 mL of an aqueous solution containing 0.2 wt% Pt, the immersion time is 12 hours, and the immersion temperature is 50°C. Then, dry at 120° C. for 4 hours, and roast ...
Embodiment 3
[0035]100 grams of β-type zeolite molecular sieves (purchased from Nankai Catalyst Factory, with a silicon-aluminum ratio of 50) were ion-exchanged with 500 milliliters of ammonium nitrate of 1 mole per liter. Each exchange was carried out for 4 hours, the solution temperature was 90° C., and the number of exchanges was 4 times. Then dry at 120°C and bake at 550°C for 3 hours. Mix the ion-exchanged molecular sieve, pseudo-boehmite, and kale powder evenly (molecular sieve: pseudo-boehmite: kale powder = 35:15:2). Then add a nitric acid solution with a concentration of 8wt% and knead it into shape. The extruded catalyst carrier was dried in the shade at room temperature for 12 hours, then dried at 120°C for 5 hours, and calcined at 550°C for 3 hours. Take 10 grams of the calcined catalyst carrier and add it to 30 mL of an aqueous solution containing 0.2 wt% Pt, the immersion time is 12 hours, and the immersion temperature is 50°C. Then, dry at 120° C. for 4 hours, and roast a...
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