Search results
Results From The WOW.Com Content Network
Sulfur trioxide is a reagent in sulfonation reactions. Dimethyl sulfate is produced commercially by the reaction of dimethyl ether with sulfur trioxide: [20] CH 3 OCH 3 + SO 3 → (CH 3) 2 SO 4. Sulfate esters are used as detergents, dyes, and pharmaceuticals. Sulfur trioxide is generated in situ from sulfuric acid or is used as a solution in ...
Oleum (Latin oleum, meaning oil), or fuming sulfuric acid, is a term referring to solutions of various compositions of sulfur trioxide in sulfuric acid, or sometimes more specifically to disulfuric acid (also known as pyrosulfuric acid). [1] Oleums can be described by the formula ySO 3 ·H 2 O where y is the
Sulfur trioxide, SO 3, a chemical compound of sulfur and the anhydride of sulfuric acid; Sulfite, SO 2− 3, a chemical ion composed of sulfur and oxygen with a 2− charge; SO(3), the special orthogonal group in 3 dimensions; the rotations that can be given an object in 3-space; Star Ocean: Till the End of Time, the third main game in the Star ...
Alternatively, alcohols can be sulfated to the half sulfate esters using sulfur trioxide. The reaction proceeds by initial formation of the pyrosulfate: 2 SO 3 + RCH 2 OH → RCH 2 OSO 2 −O−SO 3 H RCH 2 OSO 2 −O−SO 3 H → RCH 2 OSO 3 H + SO 3. Several million tons of fatty acid sulfates are produced in this way annually.
Sulfuryl fluoride (also spelled sulphuryl fluoride) is an inorganic compound with the formula SO 2 F 2.It is an easily condensed gas and has properties more similar to sulfur hexafluoride than sulfuryl chloride, being resistant to hydrolysis even up to 150 °C. [3]
If an excess of oxygen is present, sulfur trioxide (SO 3) is formed, which quickly hydrates to sulfuric acid: H 2 S + 2 O 2 → H 2 SO 4. ... Hydrogen sulfide fact sheet;
At 120 °C, hydroxylammonium sulfate begins to decompose to sulfur trioxide, nitrous oxide, water, and ammonia [dubious – discuss]: 2 (NH 3 OH) 2 SO 4 → 2 SO 3 + N 2 O + 2 NH 3 + 5 H 2 O The reaction is exothermic above 138 °C, and is most exothermic at 177 °C. [ 3 ]
Vanadium(V) oxide serves the crucial purpose of catalysing the mildly exothermic oxidation of sulfur dioxide to sulfur trioxide by air in the contact process: 2 SO 2 + O 2 ⇌ 2 SO 3. The discovery of this simple reaction, for which V 2 O 5 is the most effective catalyst, allowed sulfuric acid to become the cheap commodity chemical it is today.