40 CFR 417.110 - Applicability; description of the SO3 solvent and vacuum sulfonation subcategory.
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The provisions of this subpart are applicable to discharges resulting from the operations in which undiluted SO3 and organic reactant are fed through a mixing nozzle into a vacuum reactor where the sulfonation of the organic reactant takes place.
Title 40 published on 2013-07-01
no entries appear in the Federal Register after this date.