Designed for mercaptans removal from:

  • liquefied hydrocarbon gases;
  • naphtha, kerosene and diesel fractions;
  • light oil and gas condensate;

As well as, for treatment of:

  • sulfur-alkaline wastes;
  • produced water;
  • process condensate.


KSM catalyst has high activity of light mercaptans oxidation in water‑alkaline medium, high molecular mercaptans oxidation in two-phase alkaline‑hydrocarbons system, and sulfur-alkaline wastes treatment.

Catalyst is resistant to acids, alkali, aliphatic and aromatic hydrocarbons up to 100°C. It is insoluble in water and hydrocarbons.

KSM catalyst is produced by “AhmadullinS – Science & Technology” R&D Center  in accordance with Russian Federation patents No. 2110324 “Catalyst for sulfur compounds oxidation”, No. 2529500 “Catalyst for sulfur compounds oxidation” and Technical Specifications (TU 2175-001-40655797-2014).

  • Term of the catalyst batch production – 3 months.
  • Guaranteed service life of the catalyst – 8 years.

Cost of heterogeneous KSM-X catalyst application, during its guaranteed service life of 8 years, is about 1.5 ÷ 3.0 times lower than using homogeneous catalyst for the same period.

Highly effective KSM-X catalyst is greatly demanded by Russian and foreign companies. Its application will also allow getting significant advantages in production process.

KSM-X catalyst have been manufactured and supplied to:

— Kharg Petrochemical Company, Iran


— JSC «Syzran Refinery»


— OJSC «Gazpromneft-Moscow Refinery»


— LLC «LUKOIL-Nizhegorodnefteorgsintez» 


— JSC » Slavneft-YaroslavNOS»


— JSC «Gazpromneft-Moscow Refinery»


— JSC «Bashneft» Ufa Refinery»




— International Station for Manufacturing of Refining, Bahrain


— OJSC «Gazpromneft-Moscow Refinery»


— LLC «LUKOIL-Nizhegorodnefteorgsintez» 


— «ORLEN Lietuva — Majeyski Refinery»


— Gasoline Plant of JSC «TAIF-NK»


— JSC «Slavneft-YaroslavNOS»



The most widely used method of LPG and light naphtha sweetening processes is alkaline mercaptans extraction with the following mercaptide saturated alkaline solution regeneration by air oxidation in the presence of homogeneous or heterogeneous phthalocyanine catalysts.
When using homogeneous phthalocyanine catalyst dissolved in circulating alkaline solution, oxidation of mercaptides to disulfides proceeds not only inside of regenerator, but also outside – in pipelines and extractor. This is possible because oxygen and catalyst are dissolved in alkaline solution and are carried by it outside the regenerator . Thus, in the extractor, formed disulfides dissolve in sweetened LPG or naphtha, resulting significant increase of total sulfur content in treated product. It is undesirable due to tightening requirements for total sulfur content in fuel: Euro 4 – not more than 50 ppm, Euro 5 – not more than 10 ppm. Using insoluble in alkali heterogeneous KSM-X catalyst, oxidation of mercaptides to disulfides is limited in the volume of regenerator. This eliminates the possibility of total sulfur content increase in sweetened LPG or naphta.

For your information:
First version of KSM-X catalyst (KS) was developed in 1983. Further, LOCOS process with application of KS catalyst was developed  for oxidation of contained in wastes toxic foul-smelling hydrogen sulfide, sulphides, ammonium and sodium mercaptides to harmless oxygenates – thiosulfates, sulfates and alkyl thiosulfonates. In 1985, LOCOS process was implemented at the Moscow Refinery. In 1992, BBF sweetening process (DEMERUS LPG) with KS catalyst was developed and implemented at the Moscow Refinery.

In 1996, new modification of catalyst – KSM was developed. In 2012, it was again improved to KSM-X modification. Our catalyst is intended for mercaptan sulfur removal from LPG, gas condensate, naphtha, kerosene, diesel and light oils, as well as for oxidative treatment of sulfide containing process condensates, produced water and sulfur-alkaline wastes from gas and oil refineries, petrochemical plants, pulp & paper facilities and others. It may also be used in petrochemical synthesis for oxidation of phenols and other organic and inorganic compounds.