Sour Crude is the term used for crudes with a higher sulphur content. Tightening emissions legislation has meant that refiners need to add considerable desulphurisation capacity in order to process Sour Crude.
Styrene (also known as vinyl benzene, ethenylbenzene) is a colourless liquid in the Aromatics family. Styrene is a chemical intermediate made from the dehydration of ethyl benzene and a vinyl group on styrene molecule can readily undergo polymerization. Styrene is a monomer used in the production of variety of polymer and rubbers including: polystyrene, ABS, SBR, SBL, and unsaturated polyesters.
The Styrenics chain includes the chemical products and polymers that can be produced from the styrene monomer. Ethylbenzene, the immediate precursor used in the production of styrene is also included in this grouping.
Sweet Crude is the term used for crudes with a low sulphur content. Continued tightening of emissions legislation has increased the value of low sulphur crude in recent years.