Partial oxidation of upgraded petroleum coke

Patent · Tue Jul 21 04:00:00 EDT 1987

OSTI ID:6049447

Vasconcellos, S R; Najjar, M S; Garcia, R

This patent describes a process for the partial oxidation of particulate petroleum coke substantially comprising carbon and containing a small amount of ash comprising vanadium constituents and other materials to produce in a gas generating zone a raw gaseous stream comprising hydrogen and carbon monoxide and containing entrained unconverted particulate petroleum coke. The coke comprised of carbon and vanadium containing ash. The gaseous stream is cooled and scrubbed with water in gas cooling and scrubbing zones to produce a cooled and scrubbed clean gas stream. An aqueous dispersion of vanadium contains unconverted particulate petroleum coke. The improvement comprises: (1) mixing the aqueous dispersion of vanadium containing unconverted particulate petroleum coke having a solids concentration in the range of about 0.5 to 20.0 weight percent and a particle size in the range of about 38 microns; below to less than about 1700 microns with about 0.10 to 0.50 weight percent (basis weight of the aqueous dispersion of unreacted petroleum coke) of a vanadium collection agent to selectively separate a vanadium enriched unconverted petroleum coke fraction from a vanadium-decreased unconverted petroleum coke fraction; and about 0.5 to 5.0 weight percent of a frothing agent to produce froth. Atoms C/sub 2/ to C/sub 7/ frothing agent is selected from the group consisting of cresylic acid, pine oil, poly-propylene glycol, and mixtures; and adjusting the pH of the mixture to a value in the range of about 3 to 10, providing the mixture is not already at the pH; (2) aerating the mixed aqueous dispersion from (1) in a froth flotation zone with a gaseous material from the group consisting of air, nitrogen, carbon monoxide, steam gaseous mixtures of H/sub 2/O and CO, and mixtures thereof, and with or without mechanical agitation forming a layer of froth which floats on a bottom layer of aqueous dispersion.

• Assignee: Texaco, Inc., White Plains, NY
• Patent Number(s): US 4681700
• OSTI ID: 6049447
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020400* -- Petroleum-- Processing
ALKYL RADICALS
AQUEOUS SOLUTIONS
ASH CONTENT
CARBON
CHEMICAL REACTIONS
COKE
COOLING
DISPERSIONS
ELEMENTS
ETHYL RADICALS
FLUID FLOW
GAS FLOW
METHYL RADICALS
MIXING
MIXTURES
NONMETALS
PARTIAL OXIDATION PROCESSES
PARTICLE SIZE
PARTICLES
PARTICULATES
PETROLEUM PRODUCTS
QUANTITY RATIO
RADICALS
SCRUBBING
SIZE
SOLUTIONS
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENT COMPOUNDS
VANADIUM COMPOUNDS