Process for the cracking of high metals content feedstocks

A process for the fluid catalytic cracking of a high metals content charge stock having a total metals concentration as calculated in accordance with the relationship

• 10 [Ni] + [V] + [Fe] .gtoreq. 10
• where [Ni], [V] and [Fe] are the concentrations of nickel, vanadium and iron in parts per million by weight, which comprises contacting said charge stock in the absence of added hydrogen under catalytic cracking conditions with a catalyst comprising from 1 to 40 weight percent of a zeolite having cracking characteristics dispersed in a refractory metal oxide matrix, said matrix having a pore size distribution such that less than 20 volume percent of the pores have a pore diameter of less than 50 A and the average pore diameter is at least 90 A.

A process for the catalytic cracking of a high metals content charge stock having a total metals concentration as calculated in accordance with the relationship

• 10 [Ni] + [V] + [Fe] .gtoreq. 10
• where [Ni], [V] and [Fe] are the concentrations of nickel, vanadium and iron in parts per million by weight, which comprises contacting said charge stock in the absence of added hydrogen under catalytic cracking conditions with a catalyst comprising from 1 to 40 weight percent of a zeolite having cracking characteristics dispersed in a refractory metal oxide matrix consisting essentially of alumina and silica, said matrix having a pore size distribution such that less than 20 volume percent of the pores have a pore diameter of less than 50 A and the average pore diameter is at least 90 A.

A process for the fluid catalytic cracking of a high metals content charge stock having a total metals concentration as calculated in accordance with the relationship

• 10[Ni] + [V] + [Fe] .gtoreq. 10
• where [Ni], [V] and [Fe] are the concentrations of nickel, vanadium and iron in parts per million by weight, which comprises contacting said charge stock in the absence of added hydrogen under catalytic cracking conditions with a catalyst comprising from 1 to 40 weight percent of a zeolite dispersed in a refractory metal oxide matrix, said matrix having a pore size distribution such that less than 20 volume percent of the pores have a pore diameter of less than 50 A and the average pore diameter is at least 90 A.

A process for the fluid catalytic cracking of a high metals content charge stock having a total metals concentration as calculated in accordance with the relationship

• 10[Ni] + [V] + [Fe] .gtoreq. 10
• where [Ni], [V] and [Fe] are the concentrations of nickel, vanadium and iron in parts per million by weight, which comprises contacting said charge stock in the absence of added hydrogen under catalytic cracking conditions with a catalyst consisting essentially of from 1 to 40 weight percent of a zeolite dispersed in a refractory metal oxide matrix containing at least a portion of alumina, said matrix having a pore size distribution such that less than 20 volume percent of the pores have a pore diameter of less than 50 A and the average pore diameter is at least 90 A.

A process for the fluid catalytic cracking of a high metals content charge stock having a total metals concentration as calculated in accordance with the relationship

• 10[Ni] + [V] + [Fe] .gtoreq. 10
• where [Ni], [V] and [Fe] are the concentrations of nickel, vanadium and iron in parts per million by weight, which comprises contacting said charge stock in the absence of added hydrogen under catalytic cracking conditions with a catalyst comprising from 1 to 40 weight percent of a zeolite dispersed in a refractory metal oxide matrix, said matrix having (i) an average pore diameter sufficiently large and (ii) a sufficiently small percentage of pores having a diameter of less than 50 A corresponding to a dried matrix calcined in air at 1000.degree.F. for 10 hours having (i) an average pore diameter of at least 90 A and (ii) less than 20 volume percent of its pores with a diameter of less than 50 A.