Electrochemical Study of 2,6-Dimethyl-4-Heptanone Used to Construct Microliquid/Liquid Interface
Zhang X, et al. Journal of Electroanalytical Chemistry, 2016, 781, 76-82.
Using 2,6-Dimethyl-4-heptanone as the organic phase, the water/ketone interface can be successfully constructed. Thermodynamic data for TPAs+, TBA+, BF4-, IO4- and ClO4- were studied within the available potential window of the water/2,6-dimethyl-4-heptanone interface. The results indicate that 2,6-dimethyl-4-heptanone is suitable for further charge transfer studies (e.g., promoting ion transfer and electron transfer).
Ion transfers at the water/2,6-dimethyl-4-heptanone interface
· 2,6-dimethyl-4-heptanone has a much wider potential window than most of the nonanones. It is likely caused by the existence of the branch structure and its relatively lower permittivity.
· There are no transfers of TMA+, TEA+, TPrA+, TPB-, Br-, and I- which could be observed within the potential window of this system.
· The transfer half-wave potentials are -0.163 V for TPAs+, -0.095 V for TBA+, -0.159 V for BF4-, -0.099 V for ClO4- and -0.075 V for IO4-, respectively.
· TPAs+ and BF4- are relatively difficult to transfer across the water/2,6-dimethyl-4-heptanone interface.
2,6-Dimethyl-4-Heptanone as An Effective Diluent in Glutaric Acid Extraction System
Pehli vanoğlu N, et al. Journal of Chemical & Engineering Data, 2010, 55(9), 2970-2973.
By measuring the reaction extraction equilibrium of glutaric acid aqueous solution and trioctylmethyl ammonium chloride (Aliquat 336) under different diluent conditions, it was found that 2,6-dimethyl-4-heptanone is glutaric acid + Aliquat 336 The most effective diluent in extraction systems, with a distribution coefficient (KD) value of up to 8.51.
Effect of 2,6-dimethyl-4-heptanone as diluent
· The distribution coefficients (KD) values for the diluents used with Aliquat 336 at a 1.31 mol ·L-1 concentration follow the trend: 2,6-dimethyl-4-heptanone (8.51) > 3-methyl-butan-1-ol (7.74) > kerosene (6.37) > decan-1-ol (5.81) > nonan-1-ol (4.97) > octan-1-ol (3.79) > toluene (3.39) > hexan-2-one (2.93) > methyl ethyl ketone (2.47) > hexane (2.29).
· The maximum removal of glutaric acid is 89.92 % with 2,6-dimethyl-4-heptanone at a 1.31 mol·L-1 initial concentration of Aliquat 336. The acid concentration of the organic phase at equilibrium CGA increased from (0.45 to 0.75) mol·L-1 with an increasing amount of Aliquat 336 from (0.22 to 1.31) mol ·L-1 with diisobutyl ketone.