Commenced in January 2007
Frequency: Monthly
Edition: International
Paper Count: 30184
Role and Effect of Temperature on LPG Sweetening Process

Authors: Ali Samadi Afshar, Sayed Reaza Hashemi

Abstract:

In the gas refineries of Iran-s South Pars Gas Complex, Sulfrex demercaptanization process is used to remove volatile and corrosive mercaptans from liquefied petroleum gases by caustic solution. This process consists of two steps. Removing low molecular weight mercaptans and regeneration exhaust caustic. Some parameters such as LPG feed temperature, caustic concentration and feed-s mercaptan in extraction step and sodium mercaptide content in caustic, catalyst concentration, caustic temperature, air injection rate in regeneration step are effective factors. In this paper was focused on temperature factor that play key role in mercaptans extraction and caustic regeneration. The experimental results demonstrated by optimization of temperature, sodium mercaptide content in caustic because of good oxidation minimized and sulfur impurities in product reduced.

Keywords: Caustic regeneration, demercaptanization, LPG sweetening, mercaptan extraction, temperature.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1080870

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References:


[1] P. Marache, "Operating Instruction. AXENS (IFP group technology)," 2003
[2] P. Marache, "Process Data Book. AXENS (IFP group technology)," 2003
[3] Liu, Ruiting, Xia, Daohong, Xiang, Yuzhi, "Oxidation of Sodium Mercaptide with Sulfonated Cobalt Phthalocyanine as Catalyst," College of Chemistry & Chemical Engineering, University of Petroleum, Dongying, 257061, China, 2003
[4] Z. Mallaki, et al., "Revamping of Merox LPG Sweetening Unit for Deeper Desulfurization," M.Sc Thesis, Iran, Sharif University of Technology, Chemical& Petroleum Eng. Dept, 2007
[5] S. Mehmandoost, P. Hejaz, " Propane Treatment unit, Operating Manual, Basis of Design & Unit Operating Considerations, " Iran South Gas Field: Phases 9&10, 2005
[6] S. Mehmandoost, P.Hejaz, "Butane Treatment unit, Operating Manual. Basis of Design & Unit Operating Considerations," Iran South Gas Field: Phases 9&10, 2005
[7] E.I. Kozliak, et al., "Mechanism of the CoSPc Catalyzed Auto oxidation of Aliphatic Thiols,: Chemistry Dept., University of North Dakota, Grand Forks, ND 58202, 2003