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A necessary condition for a successful transition to a circular or closed economy is the creation of sufficient capacity for sorting and recycling of production and consumption waste. According to experts, annually more than 10 million tons of tires go out of use in the world, only in Russia every 4–5 years the increase in used tires will be about 2 million tons, which creates serious environmental and economic problems. This research is aimed at solving the problem of recycling accumulated and formed waste tires. The article provides a comparative analysis of tire recycling methods, proves the choice of pyrolysis method and estimates the environmental and economic efficiency of the project of a plant for processing used tires by pyrolysis.

Die Untersuchung der Kinetik bei der Umsetzung von Siliciumtetrachlorid (I) mit Methanol zu Tetramethoxysilan (III) zeigt, daß die Geschwindigkeitskonstante der Bildungsreaktion des Tetramethoxysilans (III) 20 mal höher ist als die Konstante der Rückreaktion.

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