All Russia Research Institute of Chemical Technology

Moscow, Russia

All Russia Research Institute of Chemical Technology

Moscow, Russia
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Molchanova T.V.,All Russia Research Institute of Chemical Technology | Akimova I.D.,All Russia Research Institute of Chemical Technology | Smirnov K.M.,All Russia Research Institute of Chemical Technology | Krylova O.K.,All Russia Research Institute of Chemical Technology | Zharova E.V.,All Russia Research Institute of Chemical Technology
Russian Metallurgy (Metally) | Year: 2017

The recovery of scandium from the wastes of the production of uranium, titanium, iron–vanadium, and alumina is studied. The applied acid schemes of scandium transfer to a solution followed by ion-exchange recovery and extraction concentration of scandium ensure the precipitation of crude scandium oxides containing up to 5% Sc2O3. Scandium oxides of 99.96–99.99% purity are formed after additional refining of these crude oxides according to an extraction technology using a mixture 15% multiradical phosphine oxide or Cyanex-925 + 15% tributyl phosphate in kerosene. © 2017, Pleiades Publishing, Ltd.


Nikolaevskii V.B.,All Russia Research Institute of Chemical Technology | Kotsar' M.L.,All Russia Research Institute of Chemical Technology | Matyasova V.E.,All Russia Research Institute of Chemical Technology
Atomic Energy | Year: 2017

Experimental studies of the electrochemical neutralization of an alkaline solution for the production of beryllium hydroxide with simultaneous regeneration of NaOH are expounded. The kinetics is studied and the basic technological parameters are determined – current density, voltage, duration, and specific electricity consumption. The use of MF-4SK instead of MK-40 membranes in the neutralization of alkali in two stages approximately halves the process time. The concentration of the regenerated solution reaches 450 g/dm3, as required for autoclave opening. It is shown that in principle membrane electrolysis can be used for neutralization and parallel regeneration of alkali in reprocessing solutions after autoclave opening of raw material. A technological scheme is proposed for obtaining beryllium hydroxide by membrane electrolysis. © 2017 Springer Science+Business Media, LLC


Matyasova V.E.,All Russia Research Institute of Chemical Technology | Nikolaevskii V.B.,All Russia Research Institute of Chemical Technology | Alekberov Z.M.,All Russia Research Institute of Chemical Technology
Atomic Energy | Year: 2017

Experimental studies of the hydrolysis of sodium beryllate, which plays an important role in the production of beryllium hydroxide, are expounded. The influence of the caustic modulus on the completeness of beryllium extraction into hydroxide and the decomposition kinetics of sodium beryllate are studied. The parameters of hydrolysis in application to alkali solutions of autoclave breakdown of beryllium-containing concentrate are presented. It is shown that aluminum can be efficiently separated from beryllium during hydrolysis of sodium beryllate. © 2017 Springer Science+Business Media New York


Tolkachev V.A.,All Russia Research Institute of Chemical Technology | Paskhin N.P.,All Russia Research Institute of Chemical Technology | Maynikov D.V.,All Russia Research Institute of Chemical Technology
Tsvetnye Metally | Year: 2017

Ulba Metallurgical Plant applies the labor-intensive beryllium concentrate processing. In order to exclude this process from the production, we offer the concentrate opening in autoclave using sodium alkali in beryllium production technology. However, the pulps, formed after the alkali leaching, are hardly separated without flocculant additives and have low filtering rates. This is explained by a high degree of crushing of initial solid material and high alkali concentration used during leaching. Research results offered the methods of increasing the efficiency of pulp filtering and washing the sediments, obtained after alkaline opening of ore material. Production capacity of pulp filtering was considerably increased by CaO addition on the leaching stage. The pulp separation was significantly increased with simultaneous using CaO on the leaching stage and usage of flocculating agents for pulp thickening. Thickened flocculated pulps were filtered and washed under pressure with average production capacity of 30 kg/(m2.cycle). Having rather small consumption of rinsing water, the washing efficiency in all experiments was 99.9%. The filter-press with squeezed membranes is recommended for pulp filtering and sediments washing in industry. The obtained data may be used with further investigation of beryllium obtaining technology. This work was carried out within the Federal Target Program of the Ministry of Education and Science of the Russian Federation "Investigations and developments by the priority ways of development of the scientific and technological complex of Russia for 2014-2020".


Kotsar M.L.,All Russia Research Institute of Chemical Technology | Kaplenkov V.N.,All Russia Research Institute of Chemical Technology | Alekberov Z.M.,All Russia Research Institute of Chemical Technology
Tsvetnye Metally | Year: 2017

We analyzed the possible reasons of titanium alloy products cracking in the nuclear energetic units' heat-exchange equipment as a result of hydration. One of the basic factors, defining the low hydrogen resistance of alloys is the insufficient purity of their basis (titanium sponge (O, N, C, Fe)), and usage for titanium β-phase stabilizers alloying (Si, V, Cr, Mn, Fe, Mo). The low stability of the properties of the shape memory alloys based on titanium nickelide is alsoconnected with insufficient purity of the basic components (O, N, C, Fe et al.). Iodide titanium TI-1, obtained from wastes and circulation of titanium rolled products is offered to use as alternative to titanium sponge. The leading scientific-investigation institute of chemical technology created and operates the experimental base for obtaining of alloys based on high-pure titanium for nuclear energetics, aviation-space and medical equipment, investigation of their composition, structure and properties. This base includes the complex of furnace equipment for smelting of titanium-based alloys and material science complex. On the basis of high-pure (iodide) titanium, argon arc and induction smelting of charges obtained the basic and new a-alloys with Al, Zr and Sn for heatexchange equipment of nuclear energetic units and the shape memory alloy of TiNi. Their chemical composition and hardness (HB, HV) were investigated. Institute of Metallurgy and Materials Science carried out the cold and hot deformation of alloy samples before the belt and after etching and annealing, and their preparation to transfer in specialized material science organizations for investigation of microstructure and definition of physical-mechanical and corrosion properties.


Balanovsky N.V.,All Russia Research Institute of Chemical Technology | Cherednichenko A.G.,Mendeleev University of Chemical Technology
Moscow University Chemistry Bulletin | Year: 2017

Aminolysis of nitrilacrylate–divinylbenzene–methyl methacrylate copolymers by diethylenetriamine is studied under various conditions. The effect of temperature and catalyst concentration on the properties of synthesized anion exchangers depending on the duration of aminolysis is investigated. The conditions for synthesizing anion exchangers with high capacity characteristics are proposed according to the study results. © 2017, Allerton Press, Inc.


Kosynkin V.D.,All Russia Research Institute of Chemical Technology | Molchanova T.V.,All Russia Research Institute of Chemical Technology | Zharova E.V.,All Russia Research Institute of Chemical Technology
Atomic Energy | Year: 2017

The results of separation the heavy rare-earth elements pair lutetium–ytterbium by ion-exchange chromatography are presented. The technological properties of modern absorbers of strong-sulfuric-acid cationites Purolite C160 and Cybber KX 100 are analyzed. The conditions for extracting lutetium with determination of the main factors – complex-forming substance, conditions of utilization, application of different moderators, elution rate, specific load, and others – are studied. It is shown that lutetium–ytterbium separation with production of fractions containing ≥99.9% Lu with concentration 1 g/liter and Yb concentration ≤0.5 mg/liter is possible in principle. A fraction with the maximum lutetium concentration 3.6–3.7 g/liter and ytterbium concentration 0.3–0.37 g/liter, corresponding to lutetium content 91–92%, was separated. © 2017 Springer Science+Business Media New York


Balanovskii N.V.,All Russia Research Institute of Chemical Technology | Shurmel' L.B.,All Russia Research Institute of Chemical Technology | Tsarenko N.A.,All Russia Research Institute of Chemical Technology
Atomic Energy | Year: 2017

A new method for modifying ion-exchange resins was developed in order to improve the performance of industrial ionites used in the extraction of uranium. It consists in using polymer matrices made from several interpenetrating low-linkage polymer networks, which are obtained by repeated polymerization of a mixture of mono- and divinyl monomers, solvating the primary copolymer. Using this method, inter-reticular anionites for uranium sorption were synthesized by the means of double copolymerization of styrene and divinyl benzene followed by chloromethylation of the obtained matrix and amination of the chloromethylated copolymer by pyridine. It is shown that in terms of the uranium sorption capacity and kinetic characteristics inter-reticular anionites surpass the best foreign-made resins by factors of 1.3–1.8. © 2017 Springer Science+Business Media New York


Kurkov A.V.,All Russia Research Institute of Chemical Technology | Pastukhova I.V.,All Russia Research Institute of Chemical Technology
Journal of Mining Science | Year: 2010

The authors offer a new, nanotechnology-based concept of flotation. The article discusses noncovalent interaction between functional groups of the organic phosphorus collector Phosphenox at an interphase, which results in the supramolecular self-assemblage of stable nanostructures. The ways to reaching complementariness of the collector and active site of a mineral surface are indicated with the aim to improving selectivity of mineral separation. © 2010 Pleiades Publishing, Ltd.


Kol'Tsov V.Yu.,All Russia Research Institute of Chemical Technology
Glass and Ceramics (English translation of Steklo i Keramika) | Year: 2014

A method for solid-phase neutralization of waste waters (in the production of ultrapure quartz) by dry caustic lime in a moving bed of the material is studied. This method will make it possible to obtain at the exit from the granulator a solid granular product convenient for subsequent processing (briquetting and drying for the needs of metallurgy or shipment). Advantages of this method over the liquid phase method are that there is no need for preparing milk of lime or filtering finely disperse residue, the volume of wastes waters is smaller and a flux is obtained in a granular form. © 2014 Springer Science+Business Media New York.

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