Ion Exchangers and Carbon Adsorbents
from of Shale Phenols

Yu. V. Pokonova

NPKF Yuvalen, St. Petersburg, Russia

e-mail: Pokonova80@mail.ru

Received October 20, 2011

Abstract—Ampholytes with a static exchange capacity of 3.5–6.6 mg-equiv/g for 0.1 N H₂SO₄ or 1.3–2.0mg-
equiv/g for 0.1 N NaOH were obtained from shale phenols (a mixture of alkylresorcinols) by polycondensation with
polyethylenepolyamines and furfural. The interaction of shale phenols with hexamethylentetramine resulted in poly-
condensation products, which gave polyfunctional cation exchangers with a capacity of up to 7.5mg-equiv/g upon a
radiation exposure with acrylic acid. Carbon adsorbents based on the polycondensation products of shale phenols
(ampholytes) prepared in an industrial process exhibited developed microporosity (V_mi= 0.28–0.30 cm³/cm³) and a
considerable concentration of heteroatoms (to 16%). This made it possible to obtain adsorbents whose sorption
capacity and selectivity in the extraction of gold from multicomponent solutions are twice as high, as compared
with those of a KAD-iodine commercial sorbent.

DOI: 10.3103/S0361521913020080

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