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Patent No: US6565740 [USA] Application No: 09/817758
Title: Process for sweetening of lpg, light petroleum distillates by liquid-liquid extraction using metal phthalocyanine sulphonamide catalyst
Issue Date: 20-05-2003 File Date: 26-03-2001
Inventor(s): BIR SAIN, SOM NATH PURI, GAUTAM DAS, BHAGWATI PRASAD BALODI, SUNIL KUMAR, ANIL KUMAR, VIRENDRA KUMAR KAPOOR, VIRENDRA KUMAR BHATIA, TURUGA SUNDARA RAMA PRASADA RAO, GUR PRATAP RAI
IPC Classification: C10G019/00
Abstract: The present invention related to a process for sweetening of LPG light petroleum distillates by liquid liquid extraction using metal phtalocyanine sulphonamide catalyst which comprises extracting the mercaptanes contain in LPG, light petroleum distillate like pentanes, light straight run naphtha by liquid-liquid extraction using an aqueous or alcoholic solution of alkali metal hydroxide of concentration ranging between 1 wt % to 50 wt % in the presence of a metal phthalocyanine sulphonamide catalyst in the concentration ranging from 5-4000 ppmw, at a temperature ranging from 10.degree. C. to 80.degree. C. at a pressure ranging from 1 kg/cm2 -50 kg/cm2 in a continuous or batch manner, converting the mercaptanes present in above said extract into corresponding disulphides by passing air, oxygen or any oxygen containing gas at the above same temperature and pressure, regenerating the alkali solution containing catalyst for recycling by separating the upper layer of disulphides from said alkali solution of catalyst.
Licensing Option: License is already granted. Technology has already been Commercialized. Further license is possible.
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Industrial Applications Catalysts [Chemistry, Chemical Processes] Chemistry, Chemical Processes Polymers [Chemistry, Chemical Processes] Petroleum Fuels [Fuels and Lubricants]