| 摘要 |
A petroleum residual fuel oil has a finely-divided, oil-insoluble metallic additive stably suspended therein together with a calcium acetate hydrate formed in situ in the oil by the neutralization of a calcium base with acetic acid. Metallic additives specified are iron oxide, magnesium oxide, magnesium hydroxide, magnesium sulphate, dolomite, alumina, kaolin, calcium oxide and mixtures of these, but nickel compounds are also mentioned. Such additives are dispersed in the oil in order to (a) reduce the formation of stack solids during combustion, (b) abate high temperature corrosion caused by vanadium and other contaminants in the oil and (c) curtail low temperature corrosion attributable to the presence of sulphur in the oil. The calcium base may be the oxide, hydroxide or carbonate, and a little water may be added in the case of the oxide and carbonate in order to supply the water of hydration. In the examples, acetic acid is added to a slurry of calcium hydroxide in a portion of the fuel oil, magnesia or ferric oxide is then incorporated and the mixture diluted with the rest of the fuel oil.
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