extractive distillation


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extractive distillation

[ik′strak·tiv ‚dis·tə′lā·shən]
(chemical engineering)
A distillation process to separate components from eutectic mixtures; a solution of the mixture is cooled, causing one component to crystallize out and the other to remain in solution; used to separate p-xylene and m-xylene, using n-pentane as the solvent.
References in periodicals archive ?
An extractive distillation column was installed at the TANECO Complex.
In 1938, Natta studied the production of synthetic rubber and was the first to accomplish physical separation of butadiene from 1-butadiene by a new method of extractive distillation.
Extractive Distillation, This is a similar process to the azeotropic.
They have been used to simulate distillation columns, absorbers, azeotropic and extractive distillation operations (see the example below), cryogenic distillations, and liquid-liquid extraction [see reference 2 for literature citations].
Technologies to be licensed under the contract include the UOP Naphtha Hydrotreating process to pre-treat reforming feed, the CCR Platforming process to convert naphtha to high-octane blending components, and Extractive Distillation (ED) Sulfolane to recover high-purity benzene and toluene.
These were the use of molecular sieves, extractive distillation and operating under a vacuum to take advantage of the much improved relative volatility of acetone to water at lower temperatures.
In the case of extractive distillation they had to investigate the choice of solvent and the effect of solvent to feed ratio on the separation achieved.
It is used as an extractive distillation solvent and reaction solvent in the chemical industry and has many other uses in manufacturing industries such as plastics, textiles, agrochemicals, pharmaceuticals and electronics.