A catalytic cracking catalyst
A catalytic cracking and catalyst technology, applied in catalytic cracking, physical/chemical process catalysts, molecular sieve catalysts, etc., can solve problems such as low lattice collapse temperature, zeolite lattice defects, and inability to obtain silicon-aluminum ratio
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[0063] The preparation method of catalytic cracking catalyst provided by the present invention, one embodiment, the preparation method of the modified Y-type molecular sieve containing phosphorus and rare earth comprises the following steps:
[0064](1) carry out ion exchange reaction with NaY molecular sieve (also claiming NaY zeolite) and rare earth solution, filter, wash, obtain the Y-type molecular sieve of the conventional unit cell size containing rare earth that sodium oxide content reduces; Said ion exchange is usually stirred, Exchange at a temperature of 15-95°C, preferably 65-95°C, for 30-120 minutes;
[0065] (2) The Y-type molecular sieve with the rare earth-containing conventional unit cell size whose sodium oxide content is reduced is roasted for 4.5 to 7 hours at a temperature of 350 to 480° C. in an atmosphere containing 30 to 90% by volume of water vapor, and dried to obtain water A Y-type molecular sieve with a reduced unit cell constant content of less than...
Embodiment 1
[0076] Get 2000 grams of NaY molecular sieves (calculated on a dry basis) and add them to 20 liters of decationized aqueous solution and stir to make them evenly mixed. Add 600ml of RE(NO 3 ) 3 Solution (rare earth solution concentration is RE 2 o 3 Calculated as 319g / L), stirred, heated to 90-95°C and kept for 1 hour, then filtered, washed, and the filter cake was dried at 120°C to obtain a unit cell constant of 2.471nm and a sodium oxide content of 7.0% by weight. 2 o 3 A Y-type molecular sieve with a total rare earth content of 8.8% by weight is then calcined for 6 hours at a temperature of 390°C in an atmosphere containing 50% by volume of water vapor and 50% by volume of air to obtain a Y-type molecular sieve with a unit cell constant of 2.455nm. After cooling, Add molecular sieves to 6 liters of aqueous solution containing 35 grams of phosphoric acid, raise the temperature to 90°C, and perform phosphorus modification treatment for 30 minutes. After that, filter and wa...
Embodiment 2
[0081] Get 2000 grams of NaY molecular sieves (on a dry basis) and add them to 25 liters of decationized aqueous solution and stir to make them evenly mixed. Add 800 ml of RECl 3 solution (in RE 2 o 3 The calculated solution concentration is: 319g / L), stirred, heated up to 90-95°C for 1 hour, then filtered, washed, and the filter cake was dried at 120°C to obtain a unit cell constant of 2.471nm and a sodium oxide content of 5.5% by weight , with RE 2 o 3 A Y-type molecular sieve with a total rare earth content of 11.3% by weight was then calcined at a temperature of 450° C. under 80% water vapor for 5.5 hours to obtain a Y-type molecular sieve with a unit cell constant of 2.461 nm. After cooling, the molecular sieve was added to a solution containing 268 grams of In 6 liters of ammonium phosphate aqueous solution, the temperature was raised to 60°C, and the phosphorus modification treatment was carried out for 50 minutes. After that, the molecular sieve was filtered and was...
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