发明名称 |
PROCESS FOR TREATING A SULFUR-CONTAINING SPENT CAUSTIC REFINERY STREAM USING A MEMBRANE ELECTROLYZER POWERED BY A FUEL CELL |
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. |
申请公布号 |
EP1904407(A4) |
申请公布日期 |
2010.03.10 |
申请号 |
EP20060759921 |
申请日期 |
2006.05.12 |
申请人 |
SAUDI ARABIAN OIL COMPANY |
发明人 |
MARTINIE, GARY, D.;AL-SHAHRANI, FAHRAN, M.;DABBOUSI, BASHIR O. |
分类号 |
C02F1/76;C02F1/467;C02F1/72;C10G19/08 |
主分类号 |
C02F1/76 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|