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EC number: 265-058-3
CAS number: 64741-57-7
A complex combination of hydrocarbons produced by the vacuum distillation of the residuum from atmospheric distillation of crude oil. It consists of hydrocarbons having carbon numbers predominantly in the range of C20 through C50 and boiling in the range of approximately 350°C to 600°C (662°F to 1112°F). This stream is likely to contain 5 wt. % or more of 4- to 6-membered condensed ring aromatic hydrocarbons.
HFOs do not have sharply-defined melting points because they are highly heterogeneous mixtures of petroleum hydrocarbons of varying molecular weights. To better describe phase or flow characteristics of petroleum products, the pour point is routinely used. The pour point of heavy fuel oils is <30°C (CONCAWE, 1998). The pour point was determined using the ISO 3016 test method. Additionally, a range of pour point values ranging from -2 to 35°C have been reported.
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