Once-through coking with solids recycle
Patent
·
OSTI ID:5623090
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 consists of: (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 an effective flux thereby producing a solids-laden fraction and a substantially solids-free filtrate; (b) recycling the filtered solids to the coking zone; and (c) hydrotreating, in the presence of a catalyst, 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.
- Assignee:
- Exxon Research and Engineering Co., Florham, NJ
- Patent Number(s):
- US 4834864
- OSTI ID:
- 5623090
- Country of Publication:
- United States
- Language:
- English
Similar Records
Once-through coking with hydrotreating and fluid catalytic cracking
Combination coking and hydroconversion process
Combination coking and hydroconversion process
Patent
·
Tue Jun 13 00:00:00 EDT 1989
·
OSTI ID:5496396
Combination coking and hydroconversion process
Patent
·
Mon Nov 20 23:00:00 EST 1989
·
OSTI ID:6976011
Combination coking and hydroconversion process
Patent
·
Tue Sep 04 00:00:00 EDT 1990
·
OSTI ID:6405079