Why do you need Stripping Column and Liquid-liquid Extraction?

by Christian Silmaro Christian

Stripping is a physical split-up process where one or more components are detached from a liquid flow by a vapour flow. In Industrial use, the liquid and vapour streams can have concurrent or counter current flows. Stripping is generally carried out either in a packed or trayed column.

Stripping performs on the base of heat transfer. The idea is to make the conditions convenient for the component in the liquid phase to transfer to the vapour phase.

Stripping is mostly carried in trayed towers or plate columns and packed columns which is known as Stripping Column. Trayed towers subsist of a pillar with liquid flowing in the top and out the bottom. The vapour phase enters in the bottom of the pillar and exits out of the top. Inside of the pillars are trays or plates. These trays exert the liquid to flow back and forth horizontally. The vapour bubbles up through holes in the trays. The motives of these trays are to enlarge the size of contact area between the liquid and vapour phases.

Packed columns are same as trayed columns. In packed columns, the liquid and vapour enter and exit in the same way. The dissimilarity is that in packed towers there are no trays. Packing is used to enlarge the contact area between the liquid and vapour phases.

Stripping is mostly used in industrial applications to discard harmful contaminants from waste streams.

Liquid Liquid Extraction (LLE) exists in carrying one or more solutes contained in a mixture to another immiscible liquid. The solvent that is enriched in solutes is called extract.

It is also accepted as solvent extraction and partition. This extraction is a procedure to divide compounds found on their relative solubility in two different immiscible liquids, generally water and an organic solvent. It is a withdrawal of a substance from one liquid into another liquid phase.

This is generally used in chemical laboratories and it is usually performed after a chemical reaction as the segment of the workup.

This process is used in:-

•    DNA Purification

•    Food Industry

•    Analytical Chemistry

•    Purification of Amines

 

A usual modular procedure for this extraction comprises processing instrument as reactors, heat exchangers, columns and pumps. Additionally, features of large-scale modular procedure comprise thermal insulation, control systems, fire protection systems, etc.

Both these processes are cost efficient, resistant to corrosion, safe, reliable to use etc. One can install such for quick extractions.

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Created on Dec 31st 1969 18:00. Viewed 0 times.

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