首页>
外国专利>
PROCESS FOR TREATING A SULFUR-CONTAINING SPENT CAUSTIC REFINERY STREAM USING A MEMBRANE ELECTROLYZER POWERED BY A FUEL CELL
PROCESS FOR TREATING A SULFUR-CONTAINING SPENT CAUSTIC REFINERY STREAM USING A MEMBRANE ELECTROLYZER POWERED BY A FUEL CELL
展开▼
机译:使用由燃料电池驱动的膜电解器处理含硫的苛性碱炼油厂流水的方法
展开▼
页面导航
摘要
著录项
相似文献
摘要
A continuous method for the treatment of a spent aqueous caustic stream used to scrub a hydrocarbon process stream to remove oxidizable sulfur-containing compounds includes: a. mixing an oxidizing hypochlorous acid stream produced from an aqueous brine solution with the aqueous caustic stream to form a reactive mixed feedstream; b. contacting the reactive mixed feedstream with at least one catalyst to promote the oxidation of the sulfur-containing compounds and the neutralization of the sodium hydroxide; and c. recovering a neutral treated product stream comprising aqueous sodium sulfate, sodium carbonate and sodium chloride that is odorless, non-toxic and environmentally acceptable for discharge into the sea or into a conventional sewage treatment system. Preferably, the hypochlorous acid is produced by an electrolyzer that also produces a (1) hydrogen stream that is directed to a PEM fuel cell to generate at least a portion of the electrical power requirement of the electrolyzer, and (2) water that is combined with fresh sodium hydroxide from the electrolyzer to form a fresh caustic stream for use in scrubbing the hydrocarbon process stream.
展开▼