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NGL & Condensates sweetening

Natural Gasoline, NGL and Condensates are particularly valuable as commercial products and for petrochemical applications. Sulfur compound impurities in these liquids are mainly mercaptans (RSH), hydrogen sulfide (H2S) and carbonyl sulfide (COS).

Axens Offer

  • To reduce total sulfur content, an extractive sulfur removal process which eliminates H2S in a first step and extracts mercaptans (RSH) in a second step is an ideal solution to meet the minimum total sulfur specification.
  • To meet stringent copper strip corrosive specifications, a sweetening step which converts acidic sulfur compounds into less aggressive disulfides will be an acceptable low investment alternative to pass the copper strip test and to protect downstream equipment.

Sulfrex™

The extractive Sulfrex™ process eliminates mercaptans and reduces the total sulfur concentration.

With its mild operating conditions of pressure and ambient temperature, this continuous process is ideal for C3, C4, LPG, light gasoline and NGL feeds.

The light mercaptans are extracted (Extractor) by caustic solution forming water and sodium mercaptide salts (NaSR).

These salts are oxidized (Oxidizer) by air injection in the presence of Axens' LCPS 30 catalyst, producing an organic disulfide (RSSR) phase that separates by gravity (separator) from the aqueous solution.

85 Sulfrex™ and Sweetn’G™ under license
Commercial Bulletin
Sulfrex

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