Chemistry
How Phase Transfer Catalysts Enable Reactions Between Immiscible Liquids
Quick fact
In many industrial processes, phase transfer catalysis eliminates the need for costly and hazardous dipolar aprotic solvents like DMSO or DMF. Instead, a simple quaternary ammonium salt (often less than 1% by weight) can transport cyanide or other nucleophiles into an organic phase, enabling reactions that would otherwise be impractically slow, at lower cost and with less waste.
Why this is interesting
Imagine trying to mix oil and water to make a chemical react—they simply won't mix. How can a tiny catalyst shuttle reactive ions between these two worlds, turning a sluggish mixture into a fast, clean reaction?