EnvTech, Inc.[tm] - ETI Oxidizer #1[tm]

ETI Oxidizer # 1™

In addition to our flagship product, we now offer a novel oxidation technology which includes all of the advantages of Hydrogen Peroxide with none of the hazards. We have recently applied it in conjunction with ETI Cleaning & Gas Freeing Solution™ to clean and deodorize several Mercaptan storage vessels, and quickly and effectively remove iron sulfide scale from refinery process equipment.

While ETI Cleaning & Gas Freeing Solution™ has proven excellent for the cleaning & decontamination of many types of refinery process equipment, it does not destroy sulfide but rather puts it into solution. As a result, the removal of iron sulfide scale is relatively slow with ETI Cleaning & Gas Freeing Solution™ alone. However, the introduction of an oxidant (such as Hydrogen Peroxide) would speed up the dissolution of iron sulfide by oxidizing the sulfide in the solution to sulfate. Unfortunately, as the following reactions will demonstrate, the safety of introducing Hydrogen Peroxide into hydrocarbon-containing process equipment is questionable at best.

Reactions of Hydrogen Peroxide with ferrous sulfide and hydrogen sulfide follow:

ferrous sulfide
FeS + 4H₂O₂ = FeSO₄ + 4H₂O

hydrogen sulfide
H₂S + 4H₂O₂ = H₂SO₄ + 4H₂O

While the hydrogen peroxide accomplishes the desired result, it can decompose, releasing free oxygen and creating explosive conditions. The hydrogen peroxide can also accumulate and suddenly react when the proper conditions are reached. For these reasons, the addition of hydrogen peroxide must be carefully controlled and temperature and ORP carefully monitored. In many cases, these measures do not satisfy the safety concerns of oil refinery clients.

ETI Oxidizer #1™ is a binary salt which supplies the Monopersulfate ion (HS0₅-) as the oxidizing agent in solution. The similar oxidations are:

FeS + HSO₅- + 2H⁺ = FeSO4 + 4H2O

The above equation illustrates how ETI Oxidizer #1™ accomplishes the desired results. The advantage of ETI Oxidizer #1™ is that the decomposition of the Monopersulfate ion will release sulfate ions rather than free Oxygen. Furthermore the oxidizing reaction of ETI Oxidizer #1™ has a much lower heat of formation than that of hydrogen peroxide. Thus, ETI Oxidizer #1™ can safely and effectively remove sulfides from refinery process equipment.

Printable product MSDS available on our download page.

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