Term: premium coke
https://doi.org/10.1351/goldbook.P04814

Definition:
An extremely well graphitizing carbon with a high degree of optical anisotropy (isochromatic areas of optical texture above about 100 µm) and which is characterized by a combination of the following properties which differ significantly from those of regular coke: high real density, low reversible thermal expansion and low ash content combined, in most cases, with low sulfur content.

Note: Premium @C01142@ is mainly produced from tars or residues from petrochemistry by the @D01578@. Also, refined @C01121@ are used as precursors for premium @C01142@ production.

Related Terms:
1) coke (http://doi.org/10.1351/goldbook.C01142).
2) anisotropy (http://doi.org/10.1351/goldbook.AT06776).
3) delayed coking process (http://doi.org/10.1351/goldbook.D01578).
4) coal tar pitches (http://doi.org/10.1351/goldbook.C01121).
5) regular coke (http://doi.org/10.1351/goldbook.R05245).

Source: PAC, 1995, 67, 473. 'Recommended terminology for the description of carbon as a solid (IUPAC Recommendations 1995)' on page 501 (https://doi.org/10.1351/pac199567030473)

Citation: 'premium coke' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.P04814

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