×

Carbo-metallic oil conversion process and catalysts

  • US 4,877,514 A
  • Filed: 11/10/1988
  • Issued: 10/31/1989
  • Est. Priority Date: 12/07/1981
  • Status: Expired due to Fees
First Claim
Patent Images

1. A continuous process for cracking of a residual hydrocarbon feedstock into lower molecular weight hydrocarbon transportation fuels, said cracking being carried out in the presence of a catalyst having catalyst parameters comprising porosity, metals content, rare earth content, and zeolite content, said residual hydrocarbon feedstock comprising metal contaminants, fractions boiling above 1025°

  • F. comprising asphaltenes, polynuclear aromatics, naphthenes and prophyrins, which process comprises in combination the steps of;

    A. providing an aqueous slurry of a colloidal matrix material selected from the group consisting of silica colloid, alumina colloid, and mixtures thereof at a pH in the range selected from the group of ranges consisting of (1) about 3.5 to about 5.5 and (2) about 7 to about 13, said pH being selected to retard gelation of said colloidal matrix material;

    B. providing an aqueous slurry of fluidizable clay particles adjusted to a pH substantially the same as that of said colloidal matrix material;

    C. providing an aqueous slurry comprising calcined crystalline zeolite;

    D. preparing each of said aqueous slurries from ingredients including water, wherein total sodium content of a spray dried composite comprising said slurries is less than about 0.25 percent by weight sodium oxide;

    E. thoroughly mixing said slurries to provide a mixture of slurries;

    F. feeding said mixture into a spray drier to provide a fluidizable catalyst suitable for fluid catalyst cracking having less than 0.25 wt.% sodium oxide, said catalyst being prepared at the same site where said conversion process is being conducted, and said catalyst being adapted to optimize said catalyst parameters comprising porosity, metals content comprising rare earth metals and zeolite content with respect to composition of said feedstock; and

    G. contacting said catalyst in a riser cracking zone with said hydrocarbon feedstock under hydrocarbon cracking conditions comprising a catalyst-to-oil ratio in the range of about 5;

    1 to 20;

    1, a product recovery temperature within the range of 950°

    F. to 1150°

    F., and a reactant residence time of less than 3 seconds to produce hydrocarbon transportation fuels.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×