Cracking catalyst for preparing high-quality light-weight oil, and preparing method thereof
A cracking catalyst and catalyst technology, applied in cracking, catalytic cracking, petroleum industry and other directions, can solve the problems such as the inability to improve the quality of catalytically cracked diesel oil and the inability to reduce the olefin content of gasoline, achieve low density, improve the quality of gasoline and diesel oil, and increase the quality of gasoline and diesel oil. Effects of Hexane Number
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[0021] According to the preparation method of the catalyst provided by the invention, the aluminum compound is an aluminum compound capable of forming η-alumina and / or an aluminum compound capable of forming χ-alumina, or an aluminum compound capable of forming η-alumina and / or Or a mixture of aluminum compounds capable of forming χ-alumina and aluminum compounds capable of forming γ-alumina.
[0022] The aluminum compound capable of forming η-alumina can be any aluminum compound capable of forming η-alumina in the catalyst preparation process, preferably β-alumina trihydrate; the aluminum compound capable of forming χ-alumina can be Any aluminum compound capable of forming χ-alumina during catalyst preparation, preferably α-alumina trihydrate.
[0023] The aluminum compound capable of forming γ-alumina can be any aluminum compound capable of forming γ-alumina during the catalyst preparation process, selected from one of boehmite, pseudoboehmite, aluminum sol or Several kinds...
example 1-6
[0038] The following examples illustrate the catalysts provided by the invention and their preparation.
[0039] Mix β-alumina trihydrate or β-alumina trihydrate with pseudoboehmite, molecular sieves, phosphorus compounds, rare earth metal compounds and water (sometimes with clay) and spray-dry the resulting slurry to a diameter of 40 -150 micron particles and calcined to obtain catalyst C provided by the invention 1 -C 6 . Wherein, prepare catalyst by the method for example 6, be to replace pseudo-boehmite described in example 5 with aluminum sol, obtain catalyst C 6 . The amount of β-alumina trihydrate and pseudo-boehmite, the type and amount of clay, the type and amount of molecular sieve, the type and amount of phosphorus compound, and the amount of rare earth chloride solution are listed in Table 1-5 respectively. The spray drying temperature, calcination temperature and time are listed in Table 6. Catalyst C 1 -C 6 The composition is listed in Table 7.
example 7-12
[0061] The following examples illustrate the catalytic performance of the catalysts provided by the present invention.
[0062] Catalyst C 1 -C 6 Aged at 800°C for 8 hours with 100% steam. On the small-scale fluidized bed reactor, use the above-mentioned aging catalyst C 1 -C 6 Catalyzed cracking was carried out to the raw material oil shown in Table 8, and the catalyst loading was 90 grams. The reaction conditions and reaction results are listed in Table 9.
[0063] Wherein, conversion rate=gas yield+gasoline yield+coke yield. Gasoline means the distillation range is C 5 Distillate at -221°C, diesel oil refers to the fraction with a distillation range of 221-343°C, gas includes liquefied gas and dry gas, where liquefied gas refers to C 3 -C 4 fraction, the dry gas is H 2 -C 2 fractions.
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