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Laboratory preparation of sulphur trioxide, an important step in the process of making sulphuric acid. "Sulphur (a) burns in the air drawn into the apparatus by an aspirator, and thte sulphur dioxide formed passes with the excess of air into the U-tube (b) which is filled with some loose material to rid the gases of sulphur dust. In the bottle (c) the gases lose their moisture as they make their way through the flass beads drenched with concentrated sulphuric acid. The patinized asbestos in the tube (d) is gently heated, and brings about the union of the sulphur dioxide with the oxygen of the air. The sulphur trioxide resulting from the action is absorbed by concentrated sulphuric acid trickling down through the apparatus (e)." -Brownlee 1907

Sulphur Trioxide Preparation

Laboratory preparation of sulphur trioxide, an important step in the process of making sulphuric acid.…

Diagrammatic representation of the sulphuric acid contact process. "Sulphur, or ores containing sulphur, are burned in air. The sulphur dioxide and the other gaseous products of the combustion are cooled, freed from dust, arsenic, and most of the moisture, then mixedwith air and passed through a tube containing a catalytic agent, usually finely divided platinum. The oxygen of the air cmbines with the sulphur dioxide and forms the trioxide, which is then combined with water to form sulphuric acid." -Brownlee 1907

Sulphuric Acid Contract Process

Diagrammatic representation of the sulphuric acid contact process. "Sulphur, or ores containing sulphur,…