Solvent modification effect on the physical and chemical extraction of acetic acid

ABSTRACT

Combined use of inert diluents with polar modifiers enables former to be utilized for the recovery of polar value-added chemicals. The results show that polarities of both solvent and modifier are critical for efficient separations. Thus, K_D values with 1-octanol were higher than those with 1-decanol; however, those with xylene were superior to those with hexane and toluene. Increasing the amine concentrations increased the K_D values, in contrast to the trends with pH and temperature. About 33%, 79% and 67% of acetic acid was recovered using 25% (v/v) Alamine 336 in xylene, 1-octanol and 30% 1-octanol-modified xylene, respectively. Therefore, solvent modification positively affects the extraction power of inert diluents for acetic acid recovery.

KEYWORDS:

• Acetic acid
• pH
• reactive extraction
• solvent modification
• tertiary amines

Funding

The author wishes to acknowledge Selcuk University for the funding through the Scientific Research Projects (BAP) Coordination Unit under Grant Numbers, 14401102 & 15401018 and thanks A. Oguz Buyukkileci of Izmir Institute of Technology and William J. Colonna of Iowa State University.

Additional information

Funding

The author wishes to acknowledge Selcuk University for the funding through the Scientific Research Projects (BAP) Coordination Unit under Grant Numbers, 14401102 & 15401018 and thanks A. Oguz Buyukkileci of Izmir Institute of Technology and William J. Colonna of Iowa State University.