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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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1. Liquefied gases: terminology and principle

1.1 Classification

There are currently more than 200 gases used in industry . While some are stored in the gaseous phase, many are first liquefied by compression or cooling in order to be more easily transported and stored in cylinders, tanks or containers on semi-trailers or LNG tankers. To begin with, we need to distinguish between two categories of liquefied gas:

  • cryogenic liquids: these gases have a boiling point below -90°C and are transported at temperatures below their boiling point in order to limit the pressure in the...

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