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Discover the Product range DMDS sulfiding & anti-coking solution.
Product overview

In addition to supplying and delivering the most efficient and highest purity sulfiding agent, DMDS Evolution® E2 (Dimethyl disulfide), Arkema offers Carelflex®. Carelflex® is an on-site sulfiding service carried out by highly qualified technicians, providing the technical and safety knowledge, as well as assistance you need for efficient, hassle-free catalyst sulfiding.

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News & Events

Latest news

Jul 11 2017
    Finance Products Corporate

Arkema announces a project to double its thiochemicals production capacity in Malaysia

Arkema today announces a project to double its methyl mercaptan production capacity at its Kerteh ...

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Jul 11 2017
    Finance Products Corporate

Arkema announces ambitious objectives and several major projects for 2023

Presenting its long-term growth strategy at its Capital Markets Day on 11 July, Arkema affirms its ...

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Jun 04 2015
    Finance Products Corporate

Inauguration of Arkema’s Thiochemicals platform in Malaysia

On 4 June 2015, in the presence of His Royal Highness the Sultan of Terengganu and the Federal and ...

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Jan 30 2015
    Finance Products Corporate

Successful start-up of Arkema’s thiochemicals platform in Malaysia

· First thiochemicals industrial platform in Asia

· Strengthening of Arkema’s world ...

Read more

Carelflex®, your premier solution for a flexible and safe sulfiding operation

Professional advice in preparing catalyst sulfiding operation


Arkema's extensive experience with over 6,000 insitu catalyst sulfiding jobs completed worldwide, is your asset as you prepare to sulfide your catalyst. Our technical specialists will propose an optimized logistic scheme and help you select convenient implementation, and review the risk analysis and activation procedure, including the amount of DMDS Evolution® E2 needed and its flow rate range.

Delivery of the sulfiding agent


Once a desired delivery date is selected, Arkema allocates the requested high quality DMDS and establishes the most suitable logistics to meet your sulfiding schedule. We can also recommend a container or containers most suitable to your situation: road tankers, semi-bulk and bulk containers (such as ISO containers) are available. During the last few weeks leading to activation, Arkema representative keeps in close contact with the refinery to adjust the final delivery date to any unexpected change of the unit turnaround schedule.

Optimize your sulfidings, maximize your runtime


Process equipment changes, new operators, catalyst selection and loading may each have an impact on the safety and efficiency of your unit start-up. Training and procedure review are important preparation steps for your catalyst activation. Arkema provides training in the fundamentals of catalyst sulfiding. We teach the DMDS chemistry, the sulfiding stages, and pathways to generate H2S via the “efficient sulfur” concept. Our expert help in procedure review and training, utilizes Arkema’s position as a global leader in organosulfur chemistry and our vast experience with catalyst sulfiding. 

On-Site technical service


Carelflex® service provides the assistance of a specialized Arkema sulfiding technical expert for hook-up and controlled delivery of the sulfiding product. This ensures accurate and controlled sulfiding under safe conditions. The refiner benefits from Arkema's vast experience with sulfur chemicals and maintains complete control of the operation. The result is maximum catalyst activity and extended run times.

In addition to top-quality DMDS, Carelflex® service offers also in-line and real time hydrogen purity and hydrogen sulfide analyzers to carefully monitor the sulfiding process and anticipate procedure adjustments, saving time and product without compromising with the operation control.

Service innovation




Thanks to our customer’s confidence and market recognition for Carelflex® top-quality service, Arkema has extended its service portfolio to other applications or other chemical injections: 

  1. DMDS injection for Hydrogenation of Vegetal Oils (HVO) plants based on the same catalysts as those used in refineries, these biorefineries produce renewable diesel or jet fuels. Very similar DMDS supply and injection service is required for their hydrotreating catalyst sulfidings. 
  2. Amine injection for hydrocrackers (HDK) units: during the DMDS activation of the hydrocracker catalyst, the catalyst vendor may recommended an amine injection to temporary deactivate the acid sites of the HDK catalyst, and avoid large exotherms in the catalytic reactor. Arkema manufactures specialty amines and has developed Carelflex® injection services for: 

    -> TBA (Tri-n-ButylAmine, RN-CAS 102-82-9)

    -> DEAPA (DiEthylAminoPropylAmine, RN-CAS 104-78-9)

    -> DMAPAP (DiMethyldipropylenetriamine, RN-CAS 10563-29-8) 

    -> TMPDA (TetraMethylPropylenDiAmine, RN-CAS 110-95-2) 

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