Chair of Chemistry and Technology of Rare and Scattered Metals named after K. A. Bolshakov, Lomonosov Moscow University of Fine Chemical Technology, Moscow, Russia

O. V. Chernyshova, Assistant Professor, e-mail: oxcher@mail.ru

Innovation Enterprise “TETRAN” LLC, Moscow, Russia

V. I. Chernyshov, Chief Executive Officer

The behaviors of platinum, rhenium and dead catalysts KR-108 (TS 2177-019-04610600–99) in hydrochloric solutions have been investigated. The unique construction of an electrochemical set for the processing of dead reforming catalysts, permitting to produce the chlorinating agent “in situ” (directly in technological process) and extract platinum and rhenium simultaneously, have been developed and introduced into the research process. Experiments with use of the burnt and not burnt catalysts, and also in addition subjected to crushing have been conducted. The degree of extraction of valuable components for the burnt and not burnt catalyst are practically equal (platinum — 87.2%, rhenium — 84.1% and platinum — 89.1%, rhenium – 87.5% accordingly), however for processing of the burnt catalysts are necessary more long time of their finding in a reactionary zone on 8–10 hours. Dependence of degree of extraction on time of process of electrochemical hydrochlorination has been received. It has been established, that crushing of the catalyst till the size of particles of an order of 0.1 mm allows to raise extraction degree: platinum — 98.2%, rhenium — 91.4%. Solubility of a basis of the crushed catalyst at electrochemical hydrochlorination has been investigated. It has been shown, that use of the cathode with the developed surface on the basis of graphite materials allows reaching residual concentration of platinum and rhenium to concentration in some milligramme and less. The technological scheme of processing of the dead reforming catalyst via electrochemical hydrochlorination, by which metal concentrate containing rhenium and platinum is formed, has been suggested.

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