Discovery of a phosphonium ionic liquid phase from the reaction of trialkylphosphines and epichlorohydrin carbonate and application as a CO2-based triphasic demulsifier of crude oil

doi:10.1016/j.molstruc.2023.136122

Discovery of a phosphonium ionic liquid phase from the reaction of trialkylphosphines and epichlorohydrin carbonate and application as a CO2-based triphasic demulsifier of crude oil

2023-11-01

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K

Krissada Norseeda

P

Prapussorn Yingcharoen

DOI：10.1016/j.molstruc.2023.136122

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In the search for a cyclic carbonate-based compound with amphiphilic properties, we combined highly polar epichlorohydrin carbonate with a long chain trialkylphosphine (P(Octyl)3). Under prolonged stirring, these mutually insoluble reagents led to the formation of a single phase containing several phosphonium salts whose composition and mechanism of formation has been systematically investigated by a combination of NMR techniques. Importantly, the obtained phase was immiscible with both water and hydrocarbons and had an intermediate density between such phases thus enabling its application as a unique triphasic demulsifier for water in oil (W/O) mixtures using actual crude oil. This work led to a new insight into the chemistry of CO2-made cyclic carbonates and to their application as intermediates and components of CO2-dervied demulsifiers.

Keywords:

Cyclic carbonate

Demulsifier

Crude oil

CO 2 utilization

Phosphonium compounds

Discovery of a phosphonium ionic liquid phase from the reaction of trialkylphosphines and epichlorohydrin carbonate and application as a CO2-based triphasic demulsifier of crude oil

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