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Article | REF: J2775 V1

Liquefied gases as alternative solvents for green extraction of natural products

Authors: Vincent RAPINEL, Natacha ROMBAUT, Njara RAKOTOMANOMANA, Alain VALLAGEAS, Farid CHEMAT

Publication date: August 10, 2018, Review date: March 10, 2021

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4. Applications

With the recent resurgence of interest in liquefied gas extraction, industrial applications are still confidential. However, since the end of the 2000s, more than a hundred studies have been carried out, resulting in a more abundant bibliography.

Since 1950, publications on the use of liquefied gases as an extraction solvent have described processes using mainly :

  • liquefied petroleum gases (propane, n-butane and LPG), chemically similar to hexane;

  • dimethyl ether, miscible with water and capable of extracting a wide range of compounds;

  • tetrafluoroethane, which is non-flammable and more selective.

Given the characteristics of each solvent, studies focus on the extraction of lipophilic molecules, in particular the extraction...

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