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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

COUNTERCURRENT LEACHING

A process utilizing a series of leach tanks and countercurrent flow of solvent through them in reverse order to the flow of solid.

LIQUIDCOOLING

Useofcirculatingliquidto cool process equipment and hermetically sealed as transistors. liquid extraction See solvent extraction.

COUNTING CIRCUIT. COUNTERCURRENT EXTRACTION

A liquid-liquid extraction process in which the solvent and the process stream in contact with each other flow in opposite directions. Also known as countercurrent separation.

EXTRACTION COLUMN

Vertical-process vessel in which a desired product is separated from a liquid by countercurrent contact with a solvent in which the desired product is preferentially soluble.

ION EXCHANGE

A reversible process by which ions are interchanged between solids and a liquid. These ions exist throughout the solution and act almost independently.

PLUGGING

  1. Braking an electric motor by reversing its connections, so it tends to turn in the opposite direction; the circuit is opened automatically when the motor stops, so the motor does not actually reverse. 2. The formation of a barrier (plug) of solid material in a process flow system, such as a pipe or reactor.

TML

Transportable Moisture Limit - refers to the maximum amount of moisture allowable in a shipment of granular (dry bulk) material in order to keep it from acting like a liquid when external force such as the rolling of a ship is applied. These limits are listed in The Code of Safe Practice For Solid Bulk Cargoes Also known as the BC Code. This code is adopted as part of the SOLAS Convention. This limits are derived from a prescribed test of the material to determine the Flow Moisture Point.

GASIFICATION

The process of converting solid or liquid fuel into a gaseous fuel such as the gasification of coal.

SURGE PRESSURE

A phenomenon generated in a pipeline system when there is a change in the rate of flow of liquid from the line. Surge pressures can be dangerously high if the change of flow rate is too rapid and the resultant shock waves can damage pumping equipment and cause rupture of pipelines and associated equipment.

VAPOR LOCK

A condition where liquid flow is impeded by vapor trapped in a liquid line.

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