Fluid catalytic cracking catalyst composition for enhanced butylenes yields with metal passivation functionality
Disclosed herein is a fluid catalyst cracking (FCC) catalyst composition that includes a first component and a second component. The first component includes zeolite Y and a first matrix that includes a metal passivating constituent. The second component includes beta zeolite and a second matrix. Also disclosed herein are methods of preparing the FCC catalyst composition and method of using the FCC catalyst composition.
1 . A fluid catalytic cracking (FCC) catalyst composition comprising:
a first component comprising Y zeolite and a first matrix, the first matrix comprising clay, rare-earth-doped alumina, silica-alumina, silica-doped alumina, χ-alumina, δ-alumina, θ-alumina, κ-alumina, boehmite, spinel, mullite, or a combination of any two or more thereof,
wherein the first matrix further comprises a metal passivating constituent comprising a transitional alumina, the first component comprising 1 wt % to 80 wt % of the transitional alumina based on total weight of the first component; and
a second component comprising beta zeolite and oxidized phosphorus and a second matrix comprising non-zeolitic material;
wherein a weight ratio of the first component to the second component in the FCC catalyst composition ranges from 1.5:1 to about 20:1.
2 . The FCC catalyst composition of claim 1 , further comprising at least one additional component that is compositionally different from the first component and from the second component, wherein the at least one additional component comprises boron oxide, metal trap comprising a rare earth oxide dispersed within an inert material, or a combination thereof.
3 . The FCC catalyst composition of claim 2 , wherein the at least one additional component further comprises a zeolite selected from the group consisting of ZSM-5, mordenite, ferrierite, MCM-22, MCM-68, Y zeolite, beta zeolite, and a combination thereof.
4 . The FCC catalyst composition of claim 3 , wherein the at least one additional component comprises the metal trap.
5 . The FCC catalyst composition of claim 4 , wherein the rare-earth oxide comprises lanthanum oxide in an amount of at least about 5 wt %, based on total weight of the metal trap.
6 . The FCC catalyst composition of claim 4 , wherein the inert material has a mullite content of at least about 15 wt %.
7 . The FCC catalyst composition of claim 1 , wherein the Y zeolite in the first component comprises at least about 15 wt % Y-faujasite crystallized in-situ from a metakaolin-containing calcined microsphere, and wherein the first matrix comprises alumina obtained by the calcination of a dispersible boehmite contained in the microsphere.
8 . The FCC catalyst composition of claim 1 , wherein the first matrix comprises at least about 5 wt % of the transitional alumina in a combination of gamma phase and delta phase, that has been obtained by the calcination of a dispersible boehmite.
9 . The FCC catalyst composition of claim 1 , wherein the second component comprises AlPO 4 formed from boehmite and phosphoric acid, at an amount of about 1 wt % to about 25 wt %, based on total weight of the second component.
10 . The FCC catalyst composition of claim 1 , wherein the second component is substantially free of transitional alumina.
11 . The FCC catalyst composition of claim 1 , wherein the second matrix comprises kaolin.
12 . The FCC catalyst composition of claim 1 , wherein the silica to alumina ratio (SAR) in the beta zeolite ranges from about 20 to about 300.
13 . The FCC catalyst composition of claim 1 , wherein the zeolite surface area (ZSA) of the second component ranges from about 50 m 2 /g to about 300 m 2 /g.
14 . The FCC catalyst composition of claim 1 , wherein the steamed zeolite surface area (SZSA) of the second component ranges from about 50 m 2 /g to about 300 m 2 /g after steaming in 100% steam at 1450° F. for 24 hours, and wherein at least about 65% of the ZSA of the second component is maintained after steaming in 100% steam at 1450° F. for 24 hours.
15 . The FCC catalyst composition of claim 1 , wherein the Brönsted acidity of the second component ranges from about 10 μmol/g to about 65 μmol/g, and wherein the air jet attrition rate (AJAR) of the second component is less than about 5 wt %/hr.
16 . The FCC catalyst composition of claim 1 , further comprising at least one additional component comprising a boron oxide component, wherein the boron oxide component comprises a third matrix and boron oxide, and
wherein the third matrix is selected from the group consisting of kaolinite, halloysite, montmorillonite, bentonite, attapulgite, kaolin, amorphous kaolin, metakaolin, mullite, spinel, hydrous kaolin, clay, gibbsite (alumina trihydrate), boehmite, titania, alumina, silica, silica-alumina, silica-magnesia, magnesia, sepiolite, and a combination thereof.
17 . The FCC catalyst composition of claim 1 , wherein the non-zeolitic material includes boehmite alumina and kaolin.
18 . A method of making the fluid catalytic cracking (FCC) catalyst composition of claim 1 , the method comprising
blending the first component and the second component.
19 . A method of cracking a hydrocarbon feed, the method comprising contacting the feed with the FCC catalyst composition of claim 1 .
20 . A fluid catalytic cracking (FCC) catalyst composition comprising:
a first component comprising Y zeolite and a first matrix, the first matrix comprising clay, rare-earth-doped alumina, silica-alumina, silica-doped alumina, χ-alumina, δ-alumina, θ-alumina, κ-alumina, boehmite, spinel, mullite, or a combination of any two or more thereof,
wherein the first matrix further comprises a nickel and/or vanadium passivating constituent; and
a second component comprising beta zeolite and oxidized phosphorus and a second matrix comprising non-zeolitic material;
wherein a weight ratio of the first component to the second component in the FCC catalyst composition ranges from 1.5:1 to about 20:1.
21 . The FCC catalyst composition of claim 20 , wherein the nickel and/or vanadium passivating constituent comprises a transitional alumina in combination of gamma phase and delta phase that has been obtained by the calcination of a dispersible boehmite, the first component comprising 1 wt % to 80 wt % of the transitional alumina based on total weight of the first component.