Process, method, and system for removing heavy metals from fluids

从流体中去除重金属的工艺、方法和系统

Abstract

原油中的痕量水平的重金属例如汞通过将所述原油与足量的还原剂接触以将至少一部分的所述非挥发性汞转化为随后可通过汽提、洗涤、吸附以及它们的组合中的任一种去除的挥发性形式的汞来降低。在一个实施方案中,至少50%的所述汞被除去。在另一个实施方案中,去除率为至少99%。在一个实施方案中,所述还原剂选自含有至少一个具有小于+6的氧化态的硫原子的硫化合物;含铁的化合物;含锡的化合物;草酸盐;亚铜化合物;经加热分解以形成CO2和/或H2的有机酸;羟胺化合物;肼化合物;硼氢化钠;二异丁基氢化铝;硫脲;过渡金属卤化物以及它们的混合物。
Trace amount levels of heavy metals such as mercury in crude oil are reduced by contacting the crude oil with a sufficient amount of a reducing agent to convert at least a portion of the non-volatile mercury into a volatile form of mercury, which can be subsequently removed by any of stripping, scrubbing, adsorption, and combinations thereof. In one embodiment, at least 50% of the mercury is removed. In another embodiment, the removal rate is at least 99%. In one embodiment, the reducing agent is selected from sulfur compounds containing at least one sulfur atom having an oxidation state less than +6; ferrous compounds; stannous compounds; oxalates; cuprous compounds; organic acids which decompose to form CO2 and/or H2 upon heating; hydroxylamine compounds; hydrazine compounds; sodium borohydride; diisobutylaluminium hydride; thiourea; transition metal halides; and mixtures thereof.

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Cited By (1)

    Publication numberPublication dateAssigneeTitle
    CN-105289261-AFebruary 03, 2016中南大学Washing liquid for eluting mercury in mercury-containing flue gas and method for recovering mercury form mercury-containing flue gas