Extracting RSH, H2S, and COS from Liquid and Gas Streams
THIOLEX™ | Caustic Wash for Extraction of Contaminants
First licensed in 1980, Merichem Technologies THIOLEX™ uses our proprietary FIBER FILM® Contactor as the mass transfer device, with caustic as the treating reagent in liquid and gas hydrocarbon streams.
THIOLEX™ technology effectively removes mercaptan compounds (RSH), hydrogen sulfide (H2S), carbon dioxide (CO2), carbonyl sulfide (COS), and elemental sulfur. THIOLEX™ COS, which uses MEA / caustic, is also extremely effective at hydrolyzing and removing Carbonyl Sulfide (COS) to meet a client’s specifications.
Advantages
Combined with the highly efficient FIBER FILM Contactor, THIOLEX™ technology dramatically reduces capital expenditures and space requirements compared to other extraction and treating alternatives.
- No prewash step is required (unless caustic make-up is prohibitive)
- Uses caustic solution to remove impurities
- Low caustic make-up when combined with our REGEN® spent caustic regeneration system
- Total sulfur reduction
- Achieves low total sulfur specification
- Extraction efficiency is best between 60°F to 115° F
- Gives midstream customers more design and operational flexibility to remove H2S and RSH in NGL C3+ streams, increasing sales and profitability
- Excellent and proven technology for removal of sulfur impurities (RSH, H2S, COS); due to high-efficiency mass transfer, additional separation vessels are not required
FFC Plus™ Technology
The latest iteration of Merichem Technologies’ FIBER FILM® Contactor technology, FFC Plus™ can increase hydrocarbon treating rates by up to 150 percent as compared to earlier designs in the same space.
A Leader in Caustic Science
Serving the global oil and gas industry for over 50 years, Merichem Technologies is the leader in sulfur removal technology, catalysts and service solutions. Our capabilities span from design and engineering to fabrication and testing.
Solving Tomorrow’s Problems Today
Merichem Technologies combines an unsurpassed breadth and depth of experience with a highly focused commitment to our customers. We listen to them and solve their challenges, often with industry changing innovation.






