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Separation by boiling of a liquid mixture with different component boiling points; feed is introduced continuously, with continuous removal of overhead vapors and high-boiling bottoms liquids.

Related Terms


The removal of a soluble component from a liquid mixture by contact with a second liquid, immiscible with the carrier liquid in which the component is preferentially soluble.


Inverted-cone device for the separation of heavy particulates (such as sand, ore, or other mineral matter) from a liquid stream; feed enters the top of the cone, heavy particles settle to the bottom where they can be withdrawn, and liquid overflows the top edge, carrying the smaller particles or those of lower gravity over the rim; used in the mining and chemical industries.


The loss of a stored volatile liquid component or mixture by evaporation; controlled by temperature, pressure, and the presence or absence of vaporrecovery systems.


An additive that forms an azeotrope with one component of a liquid mixture to aid in otherwise difficult separations by distillation, as in azeotropic distillation.


The distillation separation of a single liquid feed stream containing three or more components into a single overhead product and a single botmultimeter See volt-ohm-milliammeter.


Separation by distillation or solvent extraction of a fully miscible liquid mixture of two chemical compounds.


Pump used to circulate process liquid out of and back into a process system, as in the circulation of distillation column bottoms through an external heater, or the circulation of storage tank bottoms to mix tank contents.


The temperature at which the saturated vapor pressure of a liquid is equal to the pressure on its surface (the boiling point varies with pressure). The boiling point at atmospheric pressure is the lowest temperature at which the saturated vapor pressure of a liquid is equal to the atmospheric pressure (when a liquid is in an open vessel).


The conversion of a liquid into vapor with the formation of bubbles.


Distillation where the entire batch of liquid feed is placed into the still at the beginning of the operation, in contrast to continuous distillation, where liquid is fed continuously into the still.

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