Once-through coking with hydrotreating and fluid catalytic cracking

Patent · Tue Jun 13 04:00:00 EDT 1989

OSTI ID:5496396

Mayer, F X; Lewis, W E; Matula, J P; Staubs, D W

This patent describes a process wherein heavy hydrocarbonaceous oil is cracked to vaporous products, including normally liquid hydrocarbons, and to coke, in a fluidized bed of solid particles in a coking zone maintained under fluidized coking conditions wherein a hot vaporous product from the coking zone is passed to a scrubbing zone, the improvement which comprises: (a) passing at least a portion of the resulting solids-containing bottoms fraction from the scrubbing zone to a microfiltration system characterized as containing a filtering means comprised of a sintered porous ceramic or metal membrane and having a substantially uniform pore size capable of retaining at least about 95 percent of the solids and capable of maintaining a flux rate from about 0.1 to about 0.5 gpm/ft/sup 2/; (b) recycling the filtered solids to the coking zone; (c) hydrotreating at least a portion of the substantially solids-free filtrate at a temperature from about 600{sup 0}F to 800{sup 0}F, a pressure from about 400 to 10,000 psi, and a hydrogen treat rate from about 500 to 10,000 standard cubic feet per barrel; and (d) passing at least a portion of hydrotreated filtrate to a catalytic cracking unit per operated at a temperature from about 875{sup 0}F to 1050{sup 0}F and a catalyst to oil ratio from about 3 to 9.

• Assignee: Exxon Research and Engineering Co., Florham Park, NJ
• Patent Number(s): US 4839023
• OSTI ID: 5496396
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020400* -- Petroleum-- Processing
CARBONIZATION
CATALYTIC CRACKING
CERAMICS
CHEMICAL REACTIONS
COKING
CRACKING
DECOMPOSITION
ELEMENTS
ENERGY SOURCES
FOSSIL FUELS
FUELS
HYDROCRACKING
HYDROGEN
HYDROGENATION
NONMETALS
PETROLEUM
PYROLYSIS
THERMOCHEMICAL PROCESSES
VISCOSITY