| 简介 |
FIELD : chemistry.
SUBSTANCE : invention relates to catalytic cracking catalyst that contains zeolite containing rare earth element, and to the way it was received, and catalytic cracking catalyst contains the active ingredient of cracking, optional mesoporous aluminosilicate material, clay and resin, which specified the active component cracking contains, consists essentially of or consists of REE-containing Y-zeolite, optional other Y-zeolite MFI-and optional structured zeolite with the specified REE-containing Y-zeolite has a content of rare earth element in calculating the 10-25 wt % of Rare-earth element oxide, for example, 11-23 wt %, cell size 2.440-2.472 nm 2.450-2.470 nm, for example, 35-65% crystallinity, e.g. 40-60%, Si/Al atomic ratio in the framework is 2.5-5.0 and the product of the ratio of the intensity I1 of the peak at2θ=1.8±0.1° to the intensityof the I2 peak at 2θ=12.3±0.1° (I1/I2) on the roentgenogram of the zeolite and the mass percentage of the rare earth element in terms of the oxide of the earth element in the zeolite is greater than 48, for example, more than 55. Method of obtaining the above catalytic cracking catalyst includes : obtaining a suspension containing the active ingredient of cracking, optional mesoporous aluminosilicate material, clay and resin; and drying spray received suspensions where the active component cracking contains, consists essentially of or consists of REE-containing Y-zeolite, optional other Y-zeolite and optional structured zeolite MFI-where the REE-containing Y-zeolite has a content of rare earth element in the calculation of oxide of rare-earth element 10-25 wt %, for example 11-23 wt %, the cell size 2.440-2.472 nm 2.450-2.470 nm for example, 35-65% crystallinity, e.g. 40-60%, Si/Al atomic ratio in the framework is 2.5-5.0 and the product of the ratio of the intensity I1 of the peak at 2θ=11.8±0.1 to the intensity of the I2 peak at 2θ=12.3±0.1° on the x-ray diffraction pattern of the zeolite and the mass percentage of the rare-earth element in calculation of the oxide of the rare-earth element in the zeolite is greater than 48, for example, more than 55.
EFFECT : getting REE-containing Y-zeolite, which has special physico-chemical characteristics, better use of rare earth element and stability structure of zeolite.
24 cl, 80 ex, 12 tbl, 2 dwg |
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