In an article entitled, “Lignin extraction from biomass with protic ionic liquids,” published March, ’14  issue of  Green Chem., (16, 1114-1119), Wesley A. Henderson and four of his associates affiliated to  Ionic Liquids & Electrolytes for Energy Technologies (ILEET) Laboratory, Department of Chemical & Biomolecular Engineering, North Carolina State University, report that they have developed a mehod of simple extraction of lignin from lignocellulosic biomass using a potentially inexpensive protic ionic liquid (PIL).  At the next step the PIL is recovered using distillation leaving the separated lignin and cellulose-rich residues available for further processing.