Anti-basic nitrogen gasoline yield increase catalysis cracking catalyst and preparation method thereof
A cracking catalyst and gasoline technology, applied in catalytic cracking, physical/chemical process catalysts, molecular sieve catalysts, etc., can solve the problems of product distribution deterioration, no cracking catalysts found, low activity, etc., and achieve high conversion rate and high catalytic cracking Effect of Activity and High Gasoline Yield
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Embodiment 5、6 and 8
[0027] The second Y-type molecular sieve is a gas-phase ultra-stable Y-type molecular sieve containing rare earths, and its preparation method includes: contacting the Y-type molecular sieves containing rare earths with silicon tetrachloride under stirring, and the contact temperature is 100-500 ° C, The contact time is 0.1-10 hours, and the weight ratio of the rare earth-containing Y-type molecular sieve to silicon tetrachloride is 1:0.05-0.5. The specific preparation method of the second Y-type molecular sieve can refer to the patent application CN1683244A, especially the examples 5, 6 and 8;
[0028] The third Y-type molecular sieve is a rare earth-containing acid-treated hydrothermal ultra-stable Y-type molecular sieve, and its preparation method includes: mixing the ultra-stable Y-type molecular sieve and an acid solution with a concentration of 0.01-2N at a liquid-solid ratio (weight) The ratio of 4-20 is fully mixed at 20-100 ° C, treated for 10-300 minutes, washed, fil...
Embodiment 1
[0049] This example is used to illustrate the catalytic cracking catalyst provided by the present invention.
[0050] (1) Preparation of modified Y-type molecular sieve
[0051] In the reactor, add 5.0 kilograms of NaY molecular sieves on a dry basis (Changling Catalyst Factory provides, crystallinity 86%, skeleton silicon-aluminum ratio (SiO 2 / Al 2 o 3molar ratio) 5.2) and 4 kg of deionized water, slowly add 4.0 liters of rare earth chloride solution (provided by Qilu Catalyst Factory, RE 2 o 3 content of 222.5 grams per liter), adjust the system pH=3.5 with 4% by weight dilute hydrochloric acid, heat up to 90°C and stir for 1.5 hours, filter, wash, and dry; then bake at 650°C and 100% steam atmosphere for 2 hours, The "cross-baked" rare earth sodium Y was obtained, which was recorded as modified molecular sieve ABY-1A.
[0052] Take 2.0 kg of modified molecular sieve ABY-1A dry basis and put it into the reaction kettle, add 1.6 kg of deionized water, and slowly add 0.5...
Embodiment 2-7
[0059] This example is used to illustrate the catalytic cracking catalyst provided by the present invention.
[0060] Prepare catalytic cracking catalyst according to the method of embodiment 1 respectively, difference is, in step (2), mesoporous silicon aluminum material, kaolin, described modified Y-type molecular sieve ABY-1, described second rare earth-containing Y-type molecular sieve (S1), the third rare earth-containing Y-type molecular sieve (S2), pseudo-boehmite and alumina sol are shown in Table 1 below in terms of dry basis, and the dosage of each component is In parts by weight, catalytic cracking catalysts C2-C7 are prepared respectively.
[0061] Table 1
[0062]
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