The Distribution of Benzene and Its Monosubstituted Derivatives between Hexane and Water

Equilibrium distribution coefficients for extraction of chlorinated hydrocarbons and aromatics from water into undecane

“…This follows since the activity coefficient is defined by reference to the mole fraction, while KD is expressed in terms of weight fraction. In fact, values of the mole-fraction-based partition coefficients into hexane, from Sekine et al (5), and into undecane, from the present work, agree within 9%. Therefore the computed values of 7S differ by no more than 9%.…”

“…In Table II, values of KD measured for extraction into undecane are compared with reported values of KD for extraction into hexane (5) and heptane (6). There is a general tendency for KD to decrease with increasing solvent molecular weight, as would be expected if values of 7S do not vary greatly.…”

“…Denoting variables for the second extraction with an asterisk and replacing wF in if eq 1 is used to relate wE* and wR*. Substituting eq 4 into eq 1 then gives KO w* we ( We* S* wE* \ u;E (5) By virtue of the quantitative extraction, wE*/wE was always much less than unity. Use of eq 5 allowed calculation of KD from the ratio of the measured wE* to the measured wE.…”

“…1,2-Dibromo-3-chloropropane (DBCP) has been widely used in agricultural regions of this country for many decades, mainly as a soil fumigant nematocide (1). Due to DBCP's low vapor pressure (0.8 mmHg at 20 °C (1), moderate solubility in water (700 mg/L at 20 °C), resistance to biodegradation (2-4), and hydrolytic stability (5), it is quite persistent in the environment. Recently, an increase in DBCP concentration has been observed in ground waters in many agricultural regions (6,7).…”

The lipophilic behaviour of organic compounds:2. The development of an aliphatic hydrocarbon/water fragmental system via interconnection with octanol-water partitioning data

“…Analogous calculations can be given for other log P ahc measurements and we decided to pool all available data from the literature in order to obtain optimal information for setting up a workable set of f ahc data. To this end, we surveyed the available literature and selected several series of simple, mono-functional structures: [20]; e: Korenman [21]; f: Yaguzhinsky [22]; g: Abrams and Prausnitz [23]; h: Iguchi [24]; i: Golumbic et al [25]; j: Holmes [26]; k: Church and Hansch [27]; l: Korenman and Makarova [28]; m: Pinney and Walters [29]; n: Huyskens and Tack [30]; o: Davis et al [31]; p: Saha et al [32] q: de Ligny et al [33]; r: Hogben et al [34]; s: Kim and Hansch [35]; t: Lissi et al [36]; u: Martin et al [37]. y Omitted from our correlation studies, because their residuals surpassed the double standard deviation.…”