To　further　reduce　the　energy　consumption,　investment　and　operating　costs　of　the　extractive　distillation　(ED)　process,　this　study　focuses　on　the　process　intensification　by　the　combination　of　ionic　liquids-based　mixed　entrainers　and　dividing　wall　column　(DWC)　for　methanol/ethanol/water　separation　process.　Based　on　the　process　simulation　results,　energy　efficiency,　economic　and　environmental　impact　assessments　were　carried　out　and　compared　with　the　benchmarked　ED　process　using　ethylene　glycol　as　entrainer.　The　ternary　ED　process　using　the　ionic　liquids-based　mixed　entrainer　can　reduce　the　total　annual　cost　(TAC)　by　about　5.98%　and　the　energy　consumption　by　2.93%.　The　TAC　and　energy　consumption　for　the　proposed　ternary　ED　process　with　DWC　using　the　ionic　liquids-based　mixed　entrainer　can　be　reduced　by　7.81%　and　4.52%,　respectively.　The　novel　ED　process　shows　the　high　energy　efficiency,　low　economy　cost　and　low　CO2　emissions　with　a　great　industrial　application　prospect　when　compared　to　the　benchmarked　process.　©　2021　Elsevier　B.V.