Catalytic auxiliary agent for raising density of propylene in catalytic cracking liquefied gas
A catalytic cracking, liquefied gas technology, applied in catalytic cracking, cracking, petroleum industry and other directions, can solve the problems of low selectivity of propylene and limited range of propylene concentration, and achieve the effect of improving selectivity and increasing propylene concentration
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Embodiment 1
[0053] Take 1.84 kg (dry basis) A 1 , 1.58 kilograms of (dry basis) kaolin and 0.98 kilograms of (dry basis) pseudo-boehmite, add 7.2 kilograms of deionized water and 2.79 kilograms of aluminum sol beating for 120 minutes, adding concentration under stirring is 36 weight % hydrochloric acid, the consumption of hydrochloric acid Make the pH of the slurry 3.0. The mixture was further beaten for 45 minutes, and then the resulting slurry was spray-dried at an inlet temperature of 500° C. and an exhaust gas temperature of 180° C. to obtain microspheres with an average particle diameter of 65 μm. The microspheres were calcined at 500°C for 1 hour to obtain 36.8 wt% A 1 , 31.6 wt% kaolin and 31.6 wt% Al 2 o 3 of microspheres.
[0054]Get 1 kg (dry basis) of the obtained microsphere product, add 10 liters of decationized water and 100 grams of diammonium hydrogen phosphate, heat up to 60° C. under stirring, react at this temperature for 20 minutes, vacuum filter the slurry, dry, a...
Embodiment 2
[0056] Take 1.94 kg (dry basis) A 1 And 2.46 kilograms (dry basis) of pseudo-boehmite, add 7.2 kilograms of deionized water and 2.79 kilograms of aluminum sol beating for 120 minutes, add the hydrochloric acid that concentration is 36 weight % under stirring, the consumption of hydrochloric acid makes the pH value of slurry 3.0. The mixture was further beaten for 45 minutes, and then the resulting slurry was spray-dried at an inlet temperature of 500° C. and an exhaust gas temperature of 180° C. to obtain microspheres with an average particle diameter of 65 μm. The microspheres were calcined at 500°C for 1 hour to obtain 38.89 wt% A 1 and 61.11 wt% Al 2 o 3 of microspheres.
[0057] Get 1 kg (dry basis) of the obtained microsphere product, add 10 liters of decationized water and 210 grams of diammonium hydrogen phosphate, heat up to 60° C. under stirring, react at this temperature for 20 minutes, vacuum filter the slurry, dry, and then Roasted at 500°C for 2 hours to obtai...
Embodiment 3
[0059] Phosphoric aluminum sol preparation: 1.05 kilograms of pseudo-boehmite (dry basis) and 3.35 kilograms of decationized water were beaten for 30 minutes, and 4.9 kilograms of concentrated phosphoric acid (chemically pure, containing 85% by weight of phosphoric acid) were added to the slurry under stirring, and the temperature was raised to 70°C, and then reacted at this temperature for 45 minutes to produce a colorless and transparent phosphoraluminum sol. where P 2 o 5 30.6 wt%, Al 2 o 3 10.5% by weight, pH=1.7.
[0060] Take 1.75 kg (dry basis) A 1 , 1.5 kilograms of (dry basis) kaolin and 0.65 kilograms of (dry basis) pseudo-boehmite, add 7.2 kilograms of deionized water and 2.79 kilograms of aluminum sol beating for 120 minutes, adding concentration under stirring is 36 weight % hydrochloric acid, the consumption of hydrochloric acid Make the pH of the slurry 3.0. Continue beating the mixture for 45 minutes, and then add 1.22 kg of phosphorus-aluminum sol to t...
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