Deep eutectic solvents as recyclable media for metal removal from crude oil

Key Points

• The research aims to explore the use of acidified deep eutectic solvents for efficient metal removal from crude oil.
• Utilized acidified deep eutectic solvents (DES) for extraction.
• Investigated protonation-driven transfer of metalloporphyrins into the DES phase.
• Assessed simple separation techniques for solvent reuse.
• Demonstrated efficient extraction of metalloporphyrins from crude oil.
• Achieved low-energy metal removal indicating a sustainable process.
• Showed potential for recycling the solvents after use.