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Pokonova Yu.V.,NPKF Yuvalen
Solid Fuel Chemistry | Year: 2011

The use of a solution of total shale phenols, furfural, and Thiokol with various filling materials makes it possible to prepare polymer concrete with a strength to 75 MN/m2 and a heat resistance to 300°C. © Allerton Press, Inc., 2011. Source


Pokonova Yu.V.,NPKF Yuvalen
Solid Fuel Chemistry | Year: 2014

A new type of the latent reactivity of petroleum asphaltites, which manifested itself under the action of γ-radiation, was determined. γ-Radiation facilitates the conversion of the asphaltites into macromolecular initiators onto which the macromolecular chains of styrene, methyl methacrylate, and acrylic acid are grafted. Based on this new type of reactivity, phosphoric acid cation exchangers and multifunctional cation exchangers were synthesized using the most environmentally appropriate non-power-consuming wasteless method. © 2014 Allerton Press, Inc. Source


Pokonova Y.V.,NPKF Yuvalen
Solid Fuel Chemistry | Year: 2013

The specific features of the thermal and radiation-induced structurization and simultaneous destruction processes of compounds from shale phenols containing water-saturated fillers (radiation-active ion exchangers) were studied. The empirical time dependence of the strength of hardened blocks was found, which made it possible to recommend operating conditions without significant changes in the physicomechanical properties. © 2013 Allerton Press, Inc. Source


Pokonova Y.V.,NPKF Yuvalen
Solid Fuel Chemistry | Year: 2013

Carbon adsorbents from shale oil were modified in 0.01-0.1 N solutions of NaOH in propanol at 20-25 C by a nondestructive low-power-consuming method using γ-radiation at a dose of 4.5 × 105 Gy. The adsorbents acquired ion-exchange properties (exchange capacity to 3.28 mg-equiv/g) upon irradiation. The activated adsorbents had an increased sorption activity toward ethyl chloride. © 2013 Allerton Press, Inc. Source


Pokonova Yu.V.,NPKF Yuvalen
Solid Fuel Chemistry | Year: 2013

Ampholytes with a static exchange capacity of 3.5-6.6 mg-equiv/g for 0.1 N H2SO4 or 1.3-2.0 mg-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 polycondensation products, which gave polyfunctional cation exchangers with a capacity of up to 7.5 mg-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 (Vmi = 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. © 2013 Allerton Press, Inc. Source

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