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    • 10. 发明授权
    • Asphalt coking method
    • 沥青焦化法
    • US4686027A
    • 1987-08-11
    • US751048
    • 1985-07-02
    • Jorge A. BonillaJohn D. Elliott
    • Jorge A. BonillaJohn D. Elliott
    • C10B55/00C10G9/00C10G9/14C10C3/00C10C3/08
    • C10B57/04C10B55/00
    • A delayed coking process and a solvent deasphalting process are combined so that an asphalt mix of asphalt and solvent from the solvent deasphalting process is sent as feedstock to the delayed coking process to form coke and intermediate hydrocarbon vapor and liquid products. The vaporization of the solvent in a delayed coker heater assists the flow of the asphalt mix through the heater, and a portion of the asphalt mix is directed to a delayed coking fractionator so that the flow of solvent through the delayed coking heater can be adjusted by varying the relative amounts of asphalt mix sent to the delayed coker heater and to the fractionator. A deasphalted oil mix of deasphalted oil and solvent from the solvent deasphalting process is heated by hotter fluid products from a fractionator in the delayed coking process, and makeup solvent to a solvent deasphalting section is heated by vapors in the fractionator overhead. The solvent is recovered from the deasphalted oil mix to yield deasphalted oil, which is stripped in the same vessel as products from the fractionator of the delayed coking process. Condensation of the vapors from the fractionator overhead produces sufficient lean oil that a separate lean oil still may not be required for the economic recovery of coker liquefied petroleum gases. Solvent may be recoverd from the lean oil and naphtha products to supplement the makeup solvent.
    • 将延迟焦化方法和溶剂脱沥青方法组合,使得来自溶剂脱沥青方法的沥青和溶剂的沥青混合物作为原料被输送到延迟焦化工艺中以形成焦炭和中间体烃蒸气和液体产物。 延迟焦化加热器中溶剂的蒸发有助于沥青混合物通过加热器的流动,并且一部分沥青混合物被引导至延迟焦化分馏塔,使得通过延迟焦化加热器的溶剂流可以通过 改变发送到延迟焦化加热器和分馏器的沥青混合料的相对量。 来自溶剂脱沥青工艺的脱沥青油和溶剂的脱沥青油混合物由延迟焦化过程中的分馏塔的较热的流体产物加热,并且在溶剂脱沥青部分中的补充溶剂被蒸馏器在分馏塔顶部加热。 从脱沥青油混合物中回收溶剂以产生脱沥青油,其在与延迟焦化方法的分馏塔的产物相同的容器中汽提。 来自分馏塔顶部的蒸汽冷凝产生足够的稀油,单独的稀油仍然可能不需要经济回收焦化液化石油气。 可以从稀油和石脑油产品中回收溶剂以补充补充溶剂。