Recovery of trifluoroacetic acid from dilute aqueous solutions by reactive distillation

Recovery of H2SO4 from an acid leach solution by diffusion dialysis

“…To determine which one is more efficient, we carried out a dialysis test using a synthetic acid solution under predetermined operational conditions. The feed was prepared using FeSO 4 , VOSO 4 and sulfuric acid which were based on the actual leaching solution. Results of the H 2 SO 4 recovery and metal ions rejection at different times are shown in Table 2.…”

“…Several methods other than direct neutralization have been developed for the recovery of sulfuric acid and other acids from industrial wastes and these include distillation [4,5], solvent extraction [6,7], ion exchange techniques [8], electrohydrolysis [9,10] and diffusion dialysis [11,12]. The diffusion dialysis is an attractive acid recovery method because it is characterized by high proton permeability and strong salts rejection [13][14][15].…”

Effect of trifluoroacetic acid on the properties of polyvinyl alcohol and polyvinyl alcohol–cellulose composites

“…This causes the breakage of the intermolecular hydrogen bonding network [34]. TFA is an organic acid, volatile, potentially recyclable by distillation [35] and miscible with many organic solvents as well as water [32]. TFA can also dissolve many other synthetic polymers such as acrylics and PVA [36,37].…”

Ultrathin and nanofibers via room temperature electrospinning from trifluoroacetic acid solutions of untreated lignocellulosic sisal fiber or sisal pulp

“…Trifluoroacetic acid (TFA), which is a very strong organofluorine acid, is widely used in organic synthesis due to its high acid strength, high volatility, and miscibility with a wide range of organic solvents. Another important advantage offered by TFA is that it can be easily recovered at low operating temperatures due to its low boiling point (72.4°C) . TFA has been used to disrupt cellulose crystallinity leading to the complete separation and dissolution of cellulose chains due to the nearly exclusive esterification of their hydroxyl groups at C6 .…”