IVKAZ Demercaptanization Catalyst (Merox)

The Demercaptanization Catalyst is a highly efficient and cost-effective solution for removing various sulfur compounds, including hydrogen sulfide, mercaptans, and other harmful sulfur substances found in crude oil, petroleum products, and industrial effluents.

Description
Industrial Catalyst Technology

IVKAZ Demercaptanization Catalyst

IVKAZ is a highly effective and economical catalyst developed for the treatment of various sulfur-containing compounds, including hydrogen sulfide, mercaptans, and other organic sulfur species present in crude oil, petroleum products, and industrial wastewater.

Based on advanced Russian technology, the IVKAZ catalyst enables efficient sweetening and demercaptanization across a wide range of hydrocarbon feedstocks. Its high catalytic activity, chemical stability, and broad applicability make it a suitable solution for refineries, gas-processing facilities, and petrochemical complexes.

Manufactured under VNIIUS Kazan License | Alternative to Merox WS and EUROPHTHAL 8020 | AXENS LCPS20/30

Technical Knowledge Center

Explore our technical articles covering IVKAZ catalyst applications, hydrocarbon sweetening, demercaptanization technologies, and sulfur treatment processes for the oil, gas, and petrochemical industries.

01 / WASTEWATER TREATMENT

SEROX-W Process: Sulfur-Containing Wastewater Treatment

Explore catalytic oxidation technology for treating sulfur-containing alkaline wastewater using the IVKAZ-W catalyst. Read Technical Article
02 / KEROSENE & DIESEL

DMD-1 Process: Kerosene and Diesel Demercaptanization

Discover the DMD-1 catalytic sweetening process for converting mercaptans in kerosene and diesel fractions into disulfides. Read Technical Article
03 / LPG TREATMENT

DMD Processes for LPG Treatment and EN 589

Learn about DMD process technologies for LPG and light hydrocarbon treatment, including sulfur control and EN 589 product-quality requirements. Read Technical Article
04 / CATALYST TECHNOLOGY

Merox Catalyst: Mercaptan Oxidation Technology

Understand Merox catalyst technology, mercaptan oxidation mechanisms, and hydrocarbon sweetening applications in petroleum refining. Read Technical Article
05 / OIL & GAS CONDENSATE

DMC Processes for Oil and Gas Condensate Treatment

Examine DMC process configurations using IVKAZ catalyst for hydrogen sulfide and mercaptan treatment in crude oil and gas condensate. Read Technical Article
Performance & Technology

Advantages and Key Features

✓High efficiency in the removal and conversion of mercaptans and sulfur-containing compounds.
✓Stable performance in alkaline media.
✓Long service life and regeneration capability.
✓Applicable to a wide range of feedstocks, from light gaseous hydrocarbons to heavier petroleum streams.
✓Suitable for treatment systems involving sulfur compounds such as H₂S, COS, and CS₂.
✓Environmentally responsible technology compatible with modern refinery and petrochemical operating requirements.
Licensed Production & Expertise

AAprolab & VNIIUS Cooperation

AAprolab, as the official and exclusive representative of VNIIUS, Russia, combines the institute’s approximately 70 years of industrial experience with the expertise and energy of a new generation of engineers. Based on this cooperation, AAprolab has established a production line for IVKAZ demercaptanization catalyst under VNIIUS license.
Proven Industrial Experience

Selected Industrial References

IVKAZ catalysts and related process technologies have been applied in a number of refinery, petrochemical, and gas-processing facilities.
DMD-2 PROCESS

Demercaptanization of Butane-Butylene Fraction

Samara Oil Refinery, Russia

In operation since 1977
DMD-2 PROCESS

Demercaptanization of Butane-Butylene Fraction

Mazeikiai Oil Refinery, Lithuania

In operation since 1990
SEROX-W PROCESS

Sulfur-Alkaline Wastewater Treatment

Burgas Oil Refinery, Bulgaria

In operation since 1994
DMD-2 PROCESS

Demercaptanization of Butane-Butylene Fraction

Ufa Oil Refinery, Russia

In operation since 1991
SEROX-W PROCESS

Sulfur-Alkaline Wastewater Treatment

NAFTAN, Novopolotsk, Belarus

In operation since 2005
DMD-3 + DMD-2 PROCESSES

Pilot Plant for Gasoline and LPG Demercaptanization

Research Institute of Petroleum Industry (RIPI), Tehran

In operation since 2002
Industrial Project Reference

Demercaptanization Complex

Kharg Petrochemical Co.

Kharg Island, Iran | In operation since 2009
The demercaptanization complex includes propane, butane, and naphtha processing units, together with sulfur-alkaline wastewater treatment.
Process / Unit Annual Capacity Daily Capacity
DMD-2 Propane Treatment 165,000 t/y 6,300 bbl/day
DMD-2 Butane Treatment 165,000 t/y 5,500 bbl/day
DMD-3 Naphtha Treatment 140,000 t/y 4,000 bbl/day
SEROX-W Sulfur-Alkaline Wastewater Treatment 2,000 t/y —
These projects represent only part of the broader international implementation record of IVKAZ catalyst technologies. IVKAZ-based processes have been applied in refineries, petrochemical complexes, and gas-processing facilities across Europe, including Bulgaria, Latvia, Lithuania, and the Netherlands, as well as in Russia and Iran.
Additional information
Thermal StabilityStable up to 100 0С
PHYSICAL AND CHEMICAL PROPERTIESAppearance:liquid Color:Dark blue Density:1.1 kg/dm3 at 20 0С Nonflammable Freezing temperature:0 0С Solubility in water:high in all proportions pH:from 7 to 10
COMPOSITION/INFORMATION ABOUT COMPONENTSWater – 70-80% Compositions on the basis of cobalt phthalocyanine (firm specific technology)
brandAAProlab Demercaptanization Catalyst
Related Process
01 / WASTEWATER TREATMENT

SEROX-W Process: Sulfur-Containing Wastewater Treatment

Explore catalytic oxidation technology for treating
sulfur-containing alkaline wastewater using the IVKAZ-W catalyst.


Read Technical Article

02 / KEROSENE & DIESEL

DMD-1 Process: Kerosene and Diesel Demercaptanization

Discover the DMD-1 catalytic sweetening process for converting
mercaptans in kerosene and diesel fractions into disulfides.


Read Technical Article

03 / LPG TREATMENT

DMD Processes for LPG Treatment and EN 589

Learn about DMD process technologies for LPG and light
hydrocarbon treatment, including sulfur control
and EN 589 product-quality requirements.


Read Technical Article

04 / CATALYST TECHNOLOGY

Merox Catalyst: Mercaptan Oxidation Technology

Understand Merox catalyst technology, mercaptan oxidation
mechanisms, and hydrocarbon sweetening applications
in petroleum refining.


Read Technical Article

05 / OIL & GAS CONDENSATE

DMC Processes for Oil and Gas Condensate Treatment

Examine DMC process configurations using IVKAZ catalyst
for hydrogen sulfide and mercaptan treatment
in crude oil and gas condensate.


Read Technical Article

Technical Document