Reduction of vanadium in recycle petroleum coke

Patent · Tue Nov 24 04:00:00 EST 1987

OSTI ID:5819464

Vasconcellos, S R; Najjar, M S; Mc Keon, R J

In 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 comprising carbon and vanadium containing ash, and the gaseous stream is cooled and scrubbed with water in gas cooling and scrubbing zones to produce a cooled and scrubbed clean gas stream and an aqueous dispersion of unconverted particulate petroleum coke; the improvement is described comprising: (1) mixing the aqueous dispersion of unconverted particulate petroleum coke (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/ 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. (3) concentrating the bottom layer of aqueous dispersion in a solids-liquid separation zone to produce water and a concentrated aqueous slurry of unconverted particulate petroleum coke having a solids concentration; (4) recycling to the partial oxidation gas generating zone at least a portion of the mixture from (3); and (5) introducing the froth into a vanadium recovery zone.

• Assignee: Texaco Inc., White Plains, NY
• Patent Number(s): US 4708819
• OSTI ID: 5819464
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020400* -- Petroleum-- Processing
ADSORBENTS
AQUEOUS SOLUTIONS
CARBON
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
COKE
COLLOIDS
DEASHING
DEMETALLIZATION
DISPERSIONS
ELEMENTS
FOAMS
HYDROGEN
METALS
MIXTURES
MOLECULAR SIEVES
NONMETALS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PARTICLES
PARTICULATES
PETROLEUM PRODUCTS
REMOVAL
SCRUBBING
SEPARATION PROCESSES
SOLUTIONS
STANDARDS
TRANSITION ELEMENTS
VANADIUM