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    • 9. 发明授权
    • Partial oxidation of petroleum coke
    • 石油焦炭部分氧化
    • US4657702A
    • 1987-04-14
    • US727955
    • 1985-04-26
    • Stephen R. VasconcellosMitri S. NajjarJames R. Pascoe
    • Stephen R. VasconcellosMitri S. NajjarJames R. Pascoe
    • C10J3/46C10J3/00
    • C10J3/466C10J3/526C10J3/74C10J3/78C10J3/84C10J2300/0943C10J2300/0956C10J2300/0959C10J2300/1807C10J2300/1846
    • 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 increased about 50 to 85 weight percent. Water may be recovered from this aqueous dispersion and recycled to the gas quench cooling and scrubbing zones. At least portions of the unconverted particulate petroleum coke from the foam layer and the bottom layer are recycled to the partial oxidation gas generator and to a vanadium recovery zone, respectively. By the subject process, the vanadium content in the recycle stream of unconverted petroleum coke to the gas generator is reduced. The life of the refractory lining of the gas generator is thereby extended.
    • 将基本上包含碳并含有少量灰分的未反应的颗粒状石油焦水性分散体与K +戊基黄原酸钒收集剂和来自石油焦炭的部分氧化反应产生合成气的方法混合,所述灰分基本上包含钒组分和其它材料, 起泡剂。 pH调节后,如果需要,混合物在泡沫浮选区进行机械搅拌或无机械搅拌。 约70〜95重量% 未转化的颗粒状石油焦炭颗粒(基础碳)的%浮在形成的泡沫层中。 将包含较粗颗粒的未转化的石油焦炭的其余部分悬浮在泡沫层浮起的底部水分散体中。 另外,在未转化的石油焦炭中进行钒成分的选择性分离。 未转化的石油焦的浮选部分中的灰分的钒含量意外地下降了约50至85重量%。 同时,悬浮在水分散体底层的未转化的石油焦炭中的灰分的钒含量意外地增加了约50至85重量%。 可以从该水分散体中回收水并再循环至气体骤冷冷却和洗涤区。 来自泡沫层和底层的未转化的颗粒状石油焦的至少一部分分别再循环到部分氧化气体发生器和钒回收区。 通过本发明方法,未转化的石油焦炭与气体发生器的再循环流中的钒含量降低。 从而延长了气体发生器耐火衬里的使用寿命。