FCC Naphtha Sweetening

Mercaptans (RSH) are naturally present in crude oils but are also generated from other sulfur compounds during crude fractionation and cracking processes. Mercaptans are undesirable because of their obnoxious odor and their tendency to hydrolyze, forming toxic and corrosive hydrogen sulfide. The classic tests for mercaptan presence are the “doctor” test and copper corrosion strip test.
The Sweetn'G® process eliminates mainly mercaptans by extraction or by their conversion into less aggressive compounds, protecting downstream equipment or units such as hydrotreaters as well as meeting fuel specifications.

Sweetn G®

Sweetn'G® is an intermediate process dedicated to Gasoline cut which can use else the SCPS-ready in fixed bed else the LCPS-30 diluted in the caustic depending on client requirements.

This process will selectively convert the acidic mercaptans to neutral disulfides in order to pass the copper strip, doctor test. Heavy sulfur molecules like thiophenes cannot be efficiently removed or transformed by caustic. As a consequence, light naphtha notably from FCCU and H-Oil® are usual feedstocks for a Sweetn'G® process. As a result, the unit scheme is adapted for each client and associated objectives such as meeting gasoline pool sulfur constraints.

Sweetn'G® combines the advantages of Sulfrex™ and Sweetn'K™ technologies thanks to optimized caustic management and without mandatory proprietary equipment. This results in a lower initial investment as well as low operating costs.

Robust and simple solution leveraging Axens’ expertise in the field of LPG sweetening

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Modular Unit

Catalysts

Sweetening Catalysts

For the sweetening of liquid hydrocarbons Axens offers catalysts using sulfonated cobalt phthalocyanine as the active material.

Adsorbents

Arsine Removal Adsorbents

The poisonous effects of arsine and other metal hydrides on hydrogenation and polymerization catalysts is well documented. By far the most common, arsine can seriously deactivate the high-activity Ziegler Natta, metallocene and noble metal catalysts used for processing cracked light ends.

Adsorbents

Chloride Removal Adsorbents

Chloride is important in both catalytic reforming and isomerization as it helps to maintain catalytic activity over time. However, as chloride is continuously fed into these units, it also has to exit.

Adsorbents

Drying Series Adsorbents

Water removal applications are widely encountered in the industry sector. Activated alumina and molecular sieves stand at the forefront of the several different materials available on the market.

Adsorbents

Mercury Removal Adsorbents

Mercury removal from hydrocarbons is crucial due to HSE-related issues, corrosion problems and downstream catalyst poisoning.

Adsorbents

Purification Series Adsorbents

Material specially developed to achieve your feedstock’s specification requirements.

Adsorbents

Sulfur Removal Adsorbents for Oil, Gas & Petrochemicals

Hydrogen sulfide (H₂S), COS, mercaptans or sulfides are common contaminants that must be removed from various gases and liquids such as natural gas, NGLs, LPGs, cracked gases, olefins or biogas.

Consulting, Studies & Audits

Axens offers a customized approach, including tailored studies, audits and consulting services, covering technical and operational challenges.

Modular Units

A modularization strategy offers superior benefits versus on-site manufacturing. During the last 40 years, Axens has supplied over 500 modular units, both onshore and offshore, providing tailor-made designs according to client project specifications.

Technical Support & Performance Management

Axens is fully committed to be your partner and provide assistance and support during your project lifecycle, from conception to start-up & running operations.

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