Reverse osmosis separations of aldehydes, ketones, and ethers in aqueous solutions using porous cellulose acetate membranes

Reverse osmosis data for a number of aldehyde, ketone, and ether solutes whose polar parameters Σσ* lie in the ranges of −0.2 to 0.6, −0.4 to 0.6, and −0.49 to 0.6, respectively, have been analyzed. The results show that solute transport parameters can be expressed as a function of steric parameters ΣEs only for ethers, polar parameter Σσ* only for aldehydes, and both ΣEs and Σσ* for ketones. The numerical values of the functional …