The Optimization of Effective Factors on Mercaptan Extraction by Alkaline Solution

General LPG sweetening method used in Iran's South Pars Gas Complex is Sulfrex liquid-liquid extraction and caustic regeneration processes which uses caustic as alkaline solution to extract mercaptans from propane and butane cuts and also uses LCPS 30 as catalyst to regenerate of exhaust caustic. The authors focused on the extraction section process. Also effect of the main operating variables on mercaptans extraction, including extraction temperature, concentration, flow rate, and amount of caustic as alkaline solution were studied and at the end, according to laboratory results, operational process parameters were optimized and tuned.