Protolytic properties of silica modified with maleinized linseed oil |
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Authors: | K. A. Kuz’mina T. I. Tikhomirova S. Kh. Isaeva P. N. Nesterenko |
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Affiliation: | (1) Faculty of Chemistry, Moscow State University, Leninskie gory, Moscow, 119899, Russia |
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Abstract: | The protolytic equilibria on the surface of silicas coated with a layer of maleinized linseed oil (MLO), a new type of carboxylic cation exchangers, were studied using potentiometric titration. The ionexchange capacity of the sorbents was determined, a parameter that first increases and then decreases with increasing concentration of MLO on the silica surface. For the dibasic carboxy groups of MLO, pK a=3.99±0.04 and 4.73±0.04, values close to pK a for succinic acid, a homogeneous analogue of the system under study. |
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