The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 20, 2003
Filed:
Mar. 26, 2001
Bir Sain, Dehradun, IN;
Som Nath Puri, Dehradun, IN;
Gautam Das, Dehradun, IN;
Bhagwati Prasad Balodi, Dehradun, IN;
Sunil Kumar, Dehradun, IN;
Anil Kumar, Dehradun, IN;
Virendra Kumar Kapoor, Dehradun, IN;
Virendra Kumar Bhatia, Dehradun, IN;
Turuga Sundara Rama Prasada Rao, Dehradun, IN;
Gur Pratap Rai, Mumbai, IN;
Council of Scientific and Industrial Research, New Delhi, IN;
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° C. to 80° C. at a pressure ranging from 1 kg/cm -50 kg/cm 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.