Technology to Produce High-Purity Anhydrous Rubidium Perrhenate on an Industrial Scale

Abstract

Technology used to produce high purity anhydrous rubidium perrhenate on an industrial scale from high purity perrhenic acid and rubidium nitrate by the ion-exchange method is described in this paper. This material is dedicated to catalyst preparation, therefore, strict purity requirements have to be fulfilled. These are satisfied by combining rubidium ion sorption on an ion exchange column and the subsequent elution of the high purity perrhenic acid solution, followed by crystallization, evaporation, purification, and drying. In the current study, rubidium and rhenium contents were found to be 22.5 wt.% and 55.4 wt.%, respectively, while contaminations were as follows: <2 ppm As, <2 ppm Bi, <5 ppm Ca, <5 ppm Cu, <3 ppm Fe, <10 ppm K, <3 ppm Mg, <5 ppm Mo, <2 ppm Na, <5 ppm Pb, and <3 ppm Zn.

Hydrometallurgical Method of Producing Lithium Perrhenate from Solutions Obtained during the Processing of Li-Ion Battery Scrap

“…This method was based on the ion exchange technology: sorption of rhenium was carried out using a weakly basic ion exchange resin A170 (Purolite, King of Prussia, PA, USA, hydroxide form), and elution with an aque-ous ammonia solution (25%, Chempur, Piekary Śl ąskie, Poland, p.a.). Catalytically pure ammonium perrhenate was crystallized from the aqueous ammonia solutions, which was then dissolved in water, and ammonium ions were sorbed, this time using a strongly acidic cation exchange resin C160 (Purolite, USA, hydrogen form) [20,60,61]. The post-sorption solution was evaporated to obtain the desired rhenium concentration of 20-400 g/dm 3 .…”

Rhenium(VII) Compounds as Inorganic Precursors for the Synthesis of Organic Reaction Catalysts

“…Produced perrhenates were washed and dried to obtain their final form. Production methods of perrhenates of selected metals, i.e., nickel(II), cobalt(II), chromium(III) were presented in details in previous publications of the main author [45,46,47,48,49,50,51]. It has to be mentioned that the important techno-economical factor of these technologies is attributed to the applied recycles that influence product purity and technology efficiency.…”