DMSO is a feedstock for dimethyl sulfone, commonly known as methylsulfonylmethane or MSM (CAS 67-71-0). Oxidation changes the sulfoxide into a sulfone, so the DMSO becomes part of the target product.
Oxidation to the sulfone
A documented route uses hydrogen peroxide:
(CH₃)₂SO + H₂O₂ → (CH₃)₂SO₂ + H₂O.
The disclosed process includes a catalyst-free conversion. Other routes may use catalysts, so the complete reaction system should be identified before comparing feedstock requirements.
Reaction control and product recovery
The oxidation is exothermic. Feed addition and heat removal need to be assessed together, with monitoring of remaining DMSO and peroxide.
Product recovery can involve crystallization and separation, or distillation followed by flaking in the disclosed processes. The selected operation determines the required product form and purification approach.
Feedstock quality follows the process
Consider DMSO assay, water and relevant impurities in the material balance and quality assessment. Aqueous hydrogen peroxide also introduces water, so a tighter incoming DMSO water limit needs a demonstrated process reason.
Incoming DMSO acceptance and finished-MSM release are separate decisions.
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