Thermodynamics Research Center, ThermoML : Journal of Chemical and Engineering Data

Separation of Butanol Using Tetradecyl(trihexyl)phosphonium Bis(2,4,4-trimethylpentyl)phosphinate, Oleyl Alcohol, and Castor Oil

Motghare, K. A.[Kalyani A.], Wasewar, K. L.[Kailas L.], Shende, D. Z.[Diwakar Z.]
J. Chem. Eng. Data 2019, 64, 12, 5079-5088
Page 2 of 28 Due to excessive energy demand, there is depletion in fossil fuel reserves, and increased in the greenhouse effect and global warming which have their adverse impacts on the environment. Bio-butanol is one of the latest types of potential, economical biofuel which has shown a promising future, because of the superior properties. Biobutanol can be produced via an acetone-butanol-ethanol (ABE) fermentation process using solventogenic Clostridium bacteria. However, a fermentative approach of butanol production has inhibition of microbial activity (normally greater than 10g/L) and affects its production. To extract butanol from fermentation broth, there are various separation methods like Gas stripping, liquid-liquid extraction adsorption, membrane solvent extraction, pervaporation which may overcome these problems. Ionic liquids can be used as a novel extractant and could be a prospective solution in replace of conventional volatile, toxic solvents. In the present work, separation of butanol from an aqueous solution using tetradecyl (trihexyl) phosphonium bis2,4,4-trimethylpentyl-phosphinate ionic liquid THTDP[TMPP], oleyl alcohol (OA) and castor oil (CO) at ambient conditions (298 1 K) has been carried out. Experimental distribution coefficients (Kd) were observed in the order of IL (2.15-26.07) greater thanOleyl alcohol (1.55-4.84) greater thanCastor oil (1.49-3.84). The average maximum Kd value was obtained as 25.54 at 0.0695 initial butanol feed concentration for THTDP [TMPP] whereas 96.23% of butanol separation was observed. The average minimal solvent to feed ratio was estimated as 0.0057, THTDP [TMPP] less than 0.0705, OA less than 0.094, CO respectively. The average maximum diffusion coefficient values of extractant-diluents blend (DBuOHE-D) for butanol were found to be 2.931x10-11 m2.s-1 in THTDP [TMPP]-OA and 1.048x10-11 m2.s-1 in THTDP [TMPP]-CO respectively.
# Formula Name
1 C4H10O butan-1-ol
2 C48H102O2P2 trihexyltetradecylphosphonium bis(2,4,4-trimethylpentyl)phosphinate
3 H2O water
The table above is generated from the ThermoML associated json file (link above). POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied; the numbers refer to the table of compounds on the left.
Type Compound-# Property Variable Constraint Phase Method #Points
  • POMD
  • 1
  • 2
  • 3
  • Molality, mol/kg - 1 ; Liquid mixture 1
  • Molality, mol/kg - 1; Liquid mixture 2
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • chromatography
  • 12