In refinery processing the introduction of an alkyl group into a molecule; sulphuric acid is a catalyst in alkylation.

Brimstone, which refers solely to sulphur produced in its elemental form, is used to distinguish elemental sulphur from other sulphur-containing compounds. Brimstone can be recovered from sour oil and gas streams, or mined by processes such as Frasch or as native refined sulphur.

Nylon-6 fiber, an end-use for sulphuric acid.

Major phosphate fertilizer; sulphuric acid is input for phosphate fertilizer manufacture.

Powdered form of sulphur produced by sublimation; may contain up to 30% of the amorphous allotrope; used in rubber vulcanization, agricultural dusts, pharmaceutical products, stock feeds.

Sulphur formed to a specific shape, such as prills, granules, pellets, pastilles, or flakes; see prilled sulphur.

After Herman Frasch, (1851-1914), hot-water sulphur mining process.

Sulphide occurs naturally in mineral ores, oil and coal deposits. Natural waters containing elevated concentrations of hydrogen sulphide are used for therapeutic baths and have been consumed for medical purposes. Hydrogen sulphide (H2S), which exists as a colorless gas under normal conditions, has a characteristic odor of rotten eggs and occurs nat [..]

Sulphur in melted and liquid form (at 127-143º C, or 260-290º F).

Sulphur in the form of a mixture of lumps and fines resulting from mechanical breaking of large blocks of solid sulphur; shipments may contain 50 wt % fines and lump diameters up to 20 cm or more.