Welcome to SAE Engineering
Oleum (Fuming Sulfuric Acid)
Oleum, also known as fuming sulfuric acid, is a highly corrosive, fuming, oily liquid composed of sulfur trioxide dissolved in sulfuric acid. It is commonly represented by the formulas H2S2O7 or H2SO4·xSO3. Oleum is a critical intermediate in the industrial manufacture of sulfuric acid and is widely used in sulfonation reactions, as well as in the production of explosives, dyes, and fertilizers.
Key Details:
Chemical Formula: H2S2O7 (disulfuric acid) or H2SO4·xSO3
Description: Colorless to brown, viscous, oily, and strongly fuming liquid with a pungent odor. Oleum releases toxic sulfur trioxide fumes upon exposure to air and is highly hygroscopic.
Key Property: Essentially an “oversaturated” form of sulfuric acid, containing approximately 15–30% or more free SO3 dissolved in 100% sulfuric acid.
Common Uses:
- Sulfuric Acid Production: Used as an intermediate in the contact process to efficiently manufacture sulfuric acid.
- Industrial Processes: Widely used in sulfonation reactions for the production of dyes, explosives, detergents, and chemical intermediates.
- Petrochemical Industry: Used in petroleum refining and processing applications.
Safety Note: Oleum is extremely hazardous. It causes severe chemical burns and releases toxic fumes. Specialized handling, storage, and transport procedures are required to prevent serious injury and environmental damage.
Contact us at: info@sae-group.net