Pulsed columns are a type of liquid-liquid extraction equipment; examples of this class of extraction equipment is used at the BNFL plant THORP. Special use in nuclear industries for fuel reprocessing, where spent fuel from reactors is subjected to solvent extraction. A pulsation is created using air by a pulse leg.
What is pulsed column extractor?
The Pulsed Column Extractor or reciprocating columns extractor uses a reciprocating pump to create pulses of short amplitude that are superimposed on the usual flow of the liquid phases. The column itself may contain packing or perforated plates.
What is raffinate and extract?
In chemical separation terminology, the raffinate (from French raffiner, to refine) is a product which has had a component or components removed. The product having the removed materials is referred to as the extract.
How does a liquid liquid extraction column work?
In nearly all liquid-liquid extraction pro- cesses one of the liquids is dispersed into the second liquid in the form of droplets. The key for a high process performance is an adapted droplet size and a uniform hold-up profile throughout the column.
What is rotating disc contactor?
A Rotating Disc Contactor (RDC) is a type of process column used in the chemical industry for Liquid Liquid Extraction, remove impurities from liquids. It Used Widely in the Pilot Plant Studies of Critical Extractions of Liquid Phase.
What is raffinate and extract phase?
Liquid extraction is the separation of the constituents of a liquid by contact with another insoluble liquid called solvent. The constituents get distributed between the two phases. The solvent rich phase is called extract and the residual liquid from which the solute has been removed is called raffinate.
What is raffinate?
: a liquid product resulting from extraction of a liquid with a solvent also : the less soluble residue that remains after extraction (as in refining lubricating oil)
What is the use of ether layer?
What is the use of ether layer? Explanation: Since ether is a non-polar compound, its layer is used to separate organic impurities.
What are the three main types of extraction methods?
The three most common types of extractions are: liquid/liquid, liquid/solid, and acid/base (also known as a chemically active extraction). The coffee and tea examples are both of the liquid/solid type in which a compound (caffeine) is isolated from a solid mixture by using a liquid extraction solvent (water).
What is extraction equilibrium?
The equilibrium between the acid and solvent is characterized by the distribution coefficient (K D ) that is defined as the ratio of concentration of acid in organic and aqueous phases.
What is an example of extraction?
Making tea is a good example of extraction. Water is placed in contact with tea bags and the “tea” is extracted from the tea leaves into the water. This works because the “tea” is soluble in water but the leaves are not. A student has performed a reaction in the laboratory.
What is extraction process?
In the extraction process, a solute is transferred from one phase to another to separate it from unreacted starting materials or impurities. Extraction is also used to facilitate the isolation of a solute from a reaction solvent that is difficult to remove by evaporation, such as a solvent with a high boiling point.
What is extractant?
a liquid used to remove a solute from a solution.
Is ether an alcohol?
Ethers are similar in structure to alcohols, and both ethers and alcohols are similar in structure to water. In an alcohol one hydrogen atom of a water molecule is replaced by an alkyl group, whereas in an ether both hydrogen atoms are replaced by alkyl or aryl groups.
What is the organic phase?
The larger the value of K, the solute will be found in greater amounts in the organic solvent. In an extraction procedure, an aqueous phase, usually water, and a immiscible organic solvent known as the organic phase are generally shaken in a container.
Is ethyl acetate denser than water?
Whether the water layer is on the top or bottom depends on the density of the other solvent (methylene chloride is heavier than water and goes to the bottom of the separtory funnel and diethyl ether and ethyl acetate are lighter than water and stay on the top).
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Pulse Column, Liquid-Liquid Extraction, Unit Operation II …
Liquid-Liquid Extraction Column Demonstration: KARR …
Source : RealOnomics.net