A static tray extractor is being used for a liquid-liquid extraction of Formic Acid (FA). A dilute FA stream is fed at the top of the extractor, which uses 2-Methyltetrahydrofuran (2-MTHF) to extract FA. The extract is sent to an azeotropic distillation column where water and 2-MTHF is distilled over the top and FA is concentrated up to 75wt% in the bottom. This FA stream is upgraded to 85 wt \% in a high-pressure distillation (HPD) column. The raffinate stream from the extractor and the aqueous phase from the decanters are sent to a steam stripper to recover the solvent and to purify water. The organic phase from the decanters is recycled to the extractor. a) Determine the possibility to reduce the number of distillation towers. b) Justify the possibility to reduce the number of distillation towers, if the solvent-to-feed ratio is reduced. c) For the extraction of lemon oil, determine the practicability of using the same process configuration. d) Determine the potential substitution of an agitated extraction column to the currently used column. e) If the rag layer and emulsions has been observed in the column, describe the corrective actions that should be taken