The present invention relates to a composition based on Al and Ce in the form of oxides (composition C1); or based on Al, Ce and La in the form of oxides (composition C2), with the following proportions: the proportion of CeO.sub.2 is between 3.0 wt % and 35.0 wt %; the proportion of La.sub.2O.sub.3 (for composition C.sub.2 only) is between 0.1 wt % and 6.0 wt %; the remainder as Al.sub.2O.sub.3; exhibiting the following porosity profile: a pore volume in the range of pores with a size of between 5 nm and 100 nm which is between 0.35 and 1.00 mL/g; anda pore volume in the range of pores with a size of between 100 nm and 1000 nm which is less than or equal to 0.15 mL/g, these pore volumes being determined by means of the mercury porosimetry technique; and the following properties: a mean size of the crystallites after calcination in air at 1100? C. for 5 hours (denoted D1100? C.-5 h) which is lower than 45.0 nm, preferably lower than 40.0 nm; a mean size of the crystallites after calcination in air at 900? C. for 2 hours (denoted D900? C.-2 h) which is lower than 25.0 nm, preferably lower than 20.0 nm, even more preferably lower than 15.0 nm; andan increase ?D of the mean size of the crystallites lower than 30.0 nm, preferably lower than 25.0 nm, ?D being calculated with the following formula: ?D=D.sub.1100?C-2h-D.sub.900C-5h; the mean size of the crystallites being obtained by XRD from the diffraction peak [111] of the cubic phase corresponding to cerium oxide, generally present at 2? between 28.0 and 30.0.

The present invention relates to a composition based on Al and Ce in the form of oxides (composition C1); or based on Al, Ce and La in the form of oxides (composition C2), with the following proportions: the proportion of CeO.sub.2 is between 3.0 wt % and 35.0 wt %; the proportion of La.sub.2O.sub.3 (for composition C.sub.2 only) is between 0.1 wt % and 6.0 wt %; the remainder as Al.sub.2O.sub.3; exhibiting the following porosity profile: a pore volume in the range of pores with a size of between 5 nm and 100 nm which is between 0.35 and 1.00 mL/g; anda pore volume in the range of pores with a size of between 100 nm and 1000 nm which is less than or equal to 0.15 mL/g, these pore volumes being determined by means of the mercury porosimetry technique; and the following properties: a mean size of the crystallites after calcination in air at 1100? C. for 5 hours (denoted D1100? C.-5 h) which is lower than 45.0 nm, preferably lower than 40.0 nm; a mean size of the crystallites after calcination in air at 900? C. for 2 hours (denoted D900? C.-2 h) which is lower than 25.0 nm, preferably lower than 20.0 nm, even more preferably lower than 15.0 nm; andan increase ?D of the mean size of the crystallites lower than 30.0 nm, preferably lower than 25.0 nm, ?D being calculated with the following formula: ?D=D.sub.1100?C-2h-D.sub.900C-5h; the mean size of the crystallites being obtained by XRD from the diffraction peak [111] of the cubic phase corresponding to cerium oxide, generally present at 2? between 28.0 and 30.0.

Catalyst compositions and processes for making and using same. The catalyst composition can include catalyst particles. The catalyst particles can include 0.001 wt % to 6 wt % of Pt and up to 10 wt % of a promoter that can include Sn, Cu, Au, Ag, Ga, or a combination thereof, or a mixture thereof disposed on a support. The support can include at least 0.5 wt % of a Group 2 element. All weight percent values are based on the weight of the support. The catalyst particles can have a median particle size in a range from 10 ?m to 500 pm. The catalyst particles can have an apparent loose bulk density in a range from 0.3 g/cm.sup.3 to 2 g/cm.sup.3, as measured according to ASTM D7481-18 modified with a 10, 25, or 50 mL graduated cylinder instead of a 100 or 250 mL graduated cylinder.

Catalyst compositions and processes for making and using same. The catalyst composition can include catalyst particles. The catalyst particles can include 0.001 wt % to 6 wt % of Pt and up to 10 wt % of a promoter that can include Sn, Cu, Au, Ag, Ga, or a combination thereof, or a mixture thereof disposed on a support. The support can include at least 0.5 wt % of a Group 2 element. All weight percent values are based on the weight of the support. The catalyst particles can have a median particle size in a range from 10 ?m to 500 pm. The catalyst particles can have an apparent loose bulk density in a range from 0.3 g/cm.sup.3 to 2 g/cm.sup.3, as measured according to ASTM D7481-18 modified with a 10, 25, or 50 mL graduated cylinder instead of a 100 or 250 mL graduated cylinder.

A supported metal oxide nanocatalyst media includes periodate moieties chemisorbed to activated alumina. The supported mixed metal oxide nanocatalyst media can be porous granular particles or powder in mesh sizes ranging from about 30 microns to about 2,500 microns. The media acts as both an oxidant and an adsorbent and can remove organic and inorganic contaminants simultaneously.

A supported metal oxide nanocatalyst media includes periodate moieties chemisorbed to activated alumina. The supported mixed metal oxide nanocatalyst media can be porous granular particles or powder in mesh sizes ranging from about 30 microns to about 2,500 microns. The media acts as both an oxidant and an adsorbent and can remove organic and inorganic contaminants simultaneously.

A catalyst for synthesizing liquefied petroleum gas according to the present invention includes: a CuZn-based catalytic material; and an MFI-type zeolite catalytic material supporting a noble metal, in which the MFI-type zeolite catalytic material contains P, and a ratio of mass (M.sub.P) of P in the MFI-type zeolite catalytic material to mass (M2) of the MFI-type zeolite catalytic material is more than 0 mass % and less than 4.5 mass %.

A catalyst for synthesizing liquefied petroleum gas according to the present invention includes: a CuZn-based catalytic material; and an MFI-type zeolite catalytic material supporting a noble metal, in which the MFI-type zeolite catalytic material contains P, and a ratio of mass (M.sub.P) of P in the MFI-type zeolite catalytic material to mass (M2) of the MFI-type zeolite catalytic material is more than 0 mass % and less than 4.5 mass %.

The present invention relates to a catalyst additive composition suitable for fluid cracking, riser cracking and fixed bed cracking with reduction in bottom and coke, wherein the aluminosilicate and silica-alumina is generated in situ from added clay and silica. The present invention is also directed towards the preparation of the said catalyst additive composition. The invention also discloses a process for cracking of heavy hydrocarbons using the said catalyst additive.

This document relates to oxidative dehydrogenation catalyst materials that include molybdenum, vanadium, beryllium, oxygen, and optionally aluminum.