A watersoftening process in which water is treated with hydrated lime (sometimes in combination with soda ash), which reacts with dissolved calcium and magnesium compounds to form precipitates that can be removed as sludge.
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SEQUESTER
To form a stable, water-soluble complex.
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BALL BEARING
An anti-friction rolling type bearing containing rolling elements in the form of balls.
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FILTER ELEMENT
The porous device that performs the actual process of filtration. Also known as Cartridge
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HYDROFINISHING
A process for treating raw extracted base stocks with hydrogen to saturate them for improved stability.
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ACID ATTACK
Caused by an incomplete flushing after an acid cleaning process of boilers or similar equipment.
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ABSORPTION
The assimilation of one material into another; in petroleum refining, the use of an absorptive liquid to selectively remove components from a process stream.
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CLOUD POINT
The temperature at which waxy crystals in an oil or fuel form a cloudy appearance.
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CORROSION INHIBITOR
Additive for protecting lubricated metal surfaces against chemical attack by water or other contaminants. There are several types of corrosion inhibitors. Polar compounds wet the metal surface preferentially, protecting it with a film of oil. Other compounds may absorb water by incorporating it in a water-in-oil emulsion so that only the oil touches the metal surface. Another type of corrosion inhibitor combines chemically with the metal to present a non- reactive surface.
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CRACKING
The process whereby large molecules are broken down by the application of heat and pressure to form smaller molecules.
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CRACKING
The process whereby large molecules are broken down by the application of heat and pressure to form smaller molecules.
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