The donor-acceptor properties of solid lignosulfonates

In the Rohrschneider-McReynolds method of constants used in gas chromatogra phy for estimating polarity and selectivity of stationary phases, the stand ard stationary nonpolar phase and the standard set of paraffin hydrocarbons were excluded. A method for separating the dispersion and polar (specific) components of the experimentally determined differential heats of adsorpti on of polar organic molecular tests on the studied surfaces was suggested, The electron and proton donor and acceptor abilities of the surface of lign osulfonate (LS) powders of various molecular and cationic compositions were estimated. The differential specific heats of adsorption were correlated w ith the donor and acceptor numbers of test adsorbate molecules (benzene, di ethyl ether, nitromethane, methyl ethyl ketone, pyridine, and ethanol) on t he surface of LSs. The dependences of the specific and nonspecific differen tial heats of adsorption on the electronic polarizability of singly charged surface cations and the molecular weight of LS were determined. The conclu sion was drawn that electron acceptor properties prevailed on the surface o f lignosulfonates.