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Process of leaching by the use of continuous equipment in which the solid and liquid are both moved mechanically, and by the use of a series of leach tanks and the countercurrent flow of solvent through the tanks in reverse order to the flow of solid.

Related Terms

RESTRICTOR

A device for producing a deliberate pressure drop or resistance in a line by reducing the cross-sectional flow area.

FILTER ELEMENT

The porous device that performs the actual process of filtration. Also known as Cartridge

HYDROFINISHING

A process for treating raw extracted base stocks with hydrogen to saturate them for improved stability.

COMPRESSOR

A device which converts mechanical force and motion into pneumatic flow power.

ACID ATTACK

Caused by an incomplete flushing after an acid cleaning process of boilers or similar equipment.

HYDROMETER

An instrument for determining either the specific gravity of a liquid or the API gravity.

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.

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.

AERATION

The state of air being suspended in a liquid such as a lubricant or hydraulic fluid.

CRACKING

The process whereby large molecules are broken down by the application of heat and pressure to form smaller molecules.
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