You are currently viewing: Literature



LO-CAT® process for costeffective desulfurization of gas streams

The LO-CAT® II process provides cost effective H2S removal for all types of gas streams in many different industries. The LO-CAT and LO-CAT II processes have achieved H2S removal efficiencies of 99.9+% in many different applications and industries. These applications include natural gas production, oil refining, biogas, landfill gas, coke oven gas, geothermal steam power production, CO2 production for beverage use, lube oil production, and many others. These applications range in size from a few SCFM to several hundred MM SCFD and from a few pounds of sulfur produced each day to greater than 20 long tons of sulfur produced each day. The sour gas entering these LO-CAT systems contain anywhere from 100 ppmv H2S to 100% H2S. The sour gas pressure ranges from a few inches water column up to 300 psig.

The LO-CAT custom designs each LO-CAT system for each application providing the user with the most cost effective solution to their H2S removal needs.

For treating either combustible gases or valuable product gas streams, the LO-CAT system is designed with separate absorber and oxidizer vessels. The LO-CAT environmentally safe, chelated iron catalyst is pumped between the vessels. The absorber removes the H2S from the sour gas, converting it to elemental sulfur. The oxidizer regenerates the catalyst. The absorber design is determined by the sour gas flow and pressure, as well the H2S removal efficiency required.

View More

Caustic services

For 65 years, Merichem has provided environmentally responsible handling of spent caustics and other secondary materials that result from refining, natural gas and petrochemical processing. Merichem Caustic Management Services safely transports your secondary materials to Merichem manufacturing facilities ...


LO-CAT - the green solution to sulfur recovery

The LO-CAT process, available exclusively from Merichem, is a patented liquid redox system that uses a proprietary chelated iron solution to convert H2S to innocuous, elemental sulfur. It does not use any toxic chemicals and does not produce any hazardous waste byproducts. The environmentally safe catalyst ...


FIBER FILM - Non-dispersive hydrocarbon treating

Introduced in 1974, the FIBER FILM® Contactor is the foundation for a variety of caustic, amine and acid treating processes. Merichem processes using FIBER FILM Contactors have been licensed worldwide and successfully applied to treating problems throughout the hydrocarbon processing industries. ...


NAPFINING™ Naphthenic acid removal

NAPFINING™ technologies were first licensed in 1977 and to date Merichem has granted 78 unit operating licenses world-wide. The non-dispersive FIBER FILM® Contactor achieves reduced capital expenditure and less plant space requirements compared to most treating alternatives, making NAPFINING™ ...


THIOLEX™ caustic extraction of acid gas

THIOLEX™ technology was rst licensed in 1980 and to date Merichem has granted 224 unit operating licenses world-wide. The non-dispersive FIBER FILM® Contactor achieves reduced capital expenditure and less plant space requirements compared to most treating alternatives, making THIOLEX™ ...


MERICON™ spent caustic processing

MERICON™ technology provides an on-site solution for the processing of spent caustics to reduce their biological oxygen demand (BOD) and chemical oxygen demand (COD), control odor, adjust acidity and destroy phenolics. Merichem Company’s patented technology produces a neutral brine effluent ...


MERICAT™ H2S & mercaptan sweetening

MERICAT™ technologies were first licensed in 1977 and to date Merichem has granted 194 unit operating licenses world-wide. The non-dispersive FIBER FILM® Contactor achieves reduced capital expenditure and less plant space requirements compared to most treating alternatives, making MERICAT™ ...


LO-CAT® process for waste water treatment plants

In 1980, Los Angeles began exploring alternatives to control the H2S concentration in the digester gas produced at the Hyperion Waste Water Treatment Plant (WWTP), which treats nearly 420 MGD, wastewater generating over 475 tons of raw sludge per day. The digester gas H2S concentration had to be controlled ...


LO-CAT® process for sulphur recovery / odor control

The LO-CAT® Hydrogen Sulfide Oxidation System provides economical H2S removal to solve odor problems quickly and effectively. LO-CAT achieves H2S removal efficiencies exceeding 98%. The system also eliminates costly once-through chemicals, offers unique mobile bed contacting material, and reduces ...


H2S oxidation system for refinery desulfurization

The European Union has recently promulgated new directives reducing the amount of residual sulfur in diesel and gasoline. These directives are requiring European refineries to revise both their fuel production processes and their downstream desulfurization strategies. One affected refinery is Irish Refining ...