Efficiency of ionic exchange metathesis in the synthesis of hydrophobic ionic liquids

CHED 304

Nathan D. Burrows, burrowsn@csp.edu, Michael A. Brooks Jr., brooksm@csp.edu, and Dr. David W. Blackburn, blackburn@csp.edu. Concordia University, St. Paul, MN 55104
The hydrophobic ionic liquid butylmethylimidizolium hexafluorophosphate (BMImPF6) can be made through an anion exchange process of the hydrophilic ionic liquid butylmethylimidizolium bromide (BMImBr) with excess potassium hexafluorophosphate (KPF6) in water. In a undergraduate teaching lab it is advantageous to use KPF6 instead of hexafluorophosphoric acid which is highly corrosive. We have studied the effectiveness of using KPF6 by analyzing the product for residual ions. We have analyzed the BMImPF6 for residual bromide ions and residual potassium ions and we have also analyzed the aqueous layer from the anion exchange for butylmethylimidizolium ions.
 

Undergraduate Research Poster Session: Analytical Chemistry
11:00 AM-1:00 PM, Monday, March 26, 2007 Hyatt Regency Chicago -- Riverside Center, Poster

Division of Chemical Education

The 233rd ACS National Meeting, Chicago, IL, March 25-29, 2007