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Hydrofinishing
| Oil glossary |
A process for treating raw extracted base stocks with hydrogen to saturate them for improved stability.
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Hydrogenation, английский
- In refining, the chemical addition of hydrogen to a hydrocarbon in the presence of a catalyst; a severe form of hydrogen treating. hydrogenation may be either destructive or non-destructive. in the former case, hydrocarbon chains are ruptured (cracked) and hydrogen is added where the breaks have occurred. in the latter, hydrogen is added to a molecule that is unsaturated with respect ot hydrogen. in either case, the resulting products are highly stable. temperatures and pressures in the hydrogenation process are usually greater than in hydrofining.
- Гидрирование, гидрогенизация. химическое присоединение водорода к другим веществам, обычно под действием высокой температуры и давления в присутствии катализатора. широко применяется в нефтяной промышленности.
- The process of passing hydrogen into an unsaturated chemical in the presence of a catalyst to convert the material to a more saturated state (i.e., containing more combined hydrogen.)
Hydrodynamic lubrication, английский
- A system of lubrication in which the shape and relative motion of the sliding surfaces causes the formation of a fluid film having sufficient pressure to separate the surfaces.
- A type of lubrication effected solely by the pumping action developed by the sliding of one surface over another in contact with an oil. adhesion to the moving surface draws the oil into the high-pressure area between the surfaces, and viscosity retards the tendency to squeeze the oil out. if the pressure developed by this action is sufficient to completely separate the two surfaces, full-fluid-film lubrication is said to prevail.
- Often referred to as “full film lubricant”; a film of oil or other fluid completely separates moving components under load, thus maintaining low friction and eliminating wear.
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