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Introduction

Liquid-liquid extraction is an advanced,ecological separation technique.Liquid-liquid extraction may be considered when some simple methods,such as rectification,do not meet your separation requirements.Under the action of the solvent,the components in your raw material can be extracted without the need for a high-energy evaporation step.

Extraction principle

A unit operation is carried out by adding a liquid solvent which is insoluble or partially miscible with the liquid mixture to be separated,and thoroughly mixing,and utilizing the difference in solubility of the components in the mixture in the solvent.

Industrial application

1.Application of liquid-liquid extraction in petrochemical industry

Separation of aromatic and non-aromatic mixtures from light oil cracking and platinum reforming

Extracting acetic acid with an ester solvent and extracting paraffin from the lubricating oil with propane

Separation of xylene and its isomers from C8 fractions using HF-BF3 as extractant

2.Application in biochemical and fine chemicals

Extraction of penicillin-containing fermentation broth with butyl acetate as solvent

Extraction of vanillin from sulfite pulp wastewater by n-propanol in the perfume industry

TBP extracts citric acid from fermentation broth in the food industry

3.Application in hydrometallurgy

Extraction of copper from copper leaching solution with a solvent such as solvent LIX63-65

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