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Studying the Kinetics of the Alkaline Processing of Boron Production Wastes under Different Conditions

  • CHEMICAL KINETICS AND CATALYSIS
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Abstract

The kinetics are studied of topochemical reactions of the formation of calcium hydrosilicate in a multicomponent aqueous system consisting of waste products of boric acid production. The waste products include silicon dioxide and calcium sulfate in equal molar fractions, an alkali metal hydroxide in a stoichiometric ratio to the molar content of calcium sulfate and silicon oxide for obtaining hydrosilicate calcium, and the volume of water calculated to obtain a solution of alkali metal sulfate with a concentration below saturation. Data are obtained on the kinetics of the formation of calcium hydrosilicates in different modes of processing (normal conditions with constant stirring; ultrasonic action at a temperature of 20°C; microwave exposure with constant stirring at a temperature of 95°C; and autoclaving at a temperature of 220°C). It is found that the fastest reaction rate is characteristic of microwave treatment, and the largest proportion of reacted alkali metal hydroxide is obtained during autoclave treatment.

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Funding

This work was performed as part of a State Task for the Institute of Chemistry, Far Eastern Branch, Russian Academy of Sciences, topic no. 0265-2019-0002.

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Authors and Affiliations

  1. Institute of Chemistry, Far Eastern Branch, Russian Academy of Sciences, 690022, Vladivostok, Russia

    P. S. Gordienko, S. B. Yarusova, I. Yu. Buravlev & I. G. Zhevtun

  2. Vladivostok State University of Economics and Service, 690014, Vladivostok, Russia

    S. B. Yarusova

Authors
  1. P. S. Gordienko
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  2. S. B. Yarusova
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  3. I. Yu. Buravlev
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  4. I. G. Zhevtun
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Correspondence to S. B. Yarusova.

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Gordienko, P.S., Yarusova, S.B., Buravlev, I.Y. et al. Studying the Kinetics of the Alkaline Processing of Boron Production Wastes under Different Conditions. Russ. J. Phys. Chem. 95, 38–42 (2021). https://doi.org/10.1134/S003602442101009X

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  • DOI: https://doi.org/10.1134/S003602442101009X

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