Details

Autor(en) / Beteiligte

• Inenaga, Kiyotoshi
• Yamauchi, Akira
• Kimizuka, Hideo

Titel

A Study of the Transport of Tetraalkylammonium Ions through Ion-exchange Membranes

Ist Teil von

• Bulletin of the Chemical Society of Japan, 1977-10, Vol.50 (10), p.2584-2588

Ort / Verlag

Tokyo: The Chemical Society of Japan

Erscheinungsjahr

1977

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The membrane potential and conductance of the cation-exchange membrane-aqueous quaternary tetraalkylammonium chloride systems have been measured by using NH4+, tetramethyl-(Me4N+), tetraethyl-(Et4N+), tetrapropyl-(Pr4N+), and tetrabutylammonium ions (Bu4N+). The potential change in the concentration cell with these salts was about 58 mV for a tenfold change of concentration. The membrane conductance in the concentration cell increased with the concentration. The membrane permeability, as estimated from the potential and conductance data, was in the order of NH4+>Me4N+>Et4N+>Pr4N+>Bu4N+; it is proportional to the geometric mean of the activities of exterior solutions. The effective pore size of the membrane was deduced from the conductance data and found to be ca. 10 Å. The selective permeation coefficient has been determined from the potential data of the two- and multi-ionic systems. The selectivity data obtained with the two-ionic system were in agreement with those obtained with the multi-ionic system. The selectivity increased with the chain length of the cation, in contrast to the reversed order of the membrane permeability in the concentration cell. This was attributed to the decreasing mobility with the increasing chain length.