Partial oxidation of petroleum coke
US4657702A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 26, 1985 |
| Grant date | Apr 14, 1987 |
| Priority date | — |
| Expiry date | Apr 26, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10J2300/1846
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An aqueous dispersion of unreacted particulate petroleum coke substantially comprising carbon and containing a small amount of ash substantially comprising vanadium constituents and other materials from a process for the partial oxidation of petroleum coke to produce synthesis gas is mixed with a K.sup.+ amyl xanthate vanadium collection agent and a frothing agent. After pH adjustment, if necessary, the mixture is subjected to aeration with or without mechanical agitation in a froth flotation zone. About 70 to 95 wt. % of the unconverted particulate petroleum coke particles (basis carbon) float in the froth layer that is formed. The remainder of the unconverted petroleum coke comprising coarser particles is suspended in a bottom aqueous dispersion on which the froth layer floats. In addition, selective separation of the vanadium constituents in the unconverted petroleum coke ash takes place. The vanadium content of the ash in the floated portion of unconverted petroleum coke is unexpectedly decreased about 50 to 85 weight percent. Simultaneously, the vanadium content of the ash in the unconverted petroleum coke suspended in the bottom layer of aqueous dispersion is unexpectedly inc…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.