Several sulfonated polymers, which are typical Brønsted acid catalysts, have been employed in the production of two biofuels: 5-ethoxymethylfurfural (EMF) and ethyl levulinate (EL) as main byproduct, catalytic results attributed to their different chemical morphological properties. The Purolite CT275DR attained best from 5-hydroxymethylfurfural (HMF) with a 63% EMF yield after 16 h at 100 °C th...

Over the past decade, there has been a steady growth in demand for rare metals, with rhenium being one of most highly demanded, but also expensive and difficult to obtain. The high is due its use as key component metallurgical alloys or catalysts used oil refining industry. aggregate facts causes profitability processing rhenium-containing mineral resources, which are copper substandard concent...

The article investigates the sorption method of concentrating rare metals on various sorbents (brands “Purolight”: A-100, A-170, A-172 and BO-020) determines optimal conditions for their extraction. It is shown that extraction molybdenum sorbent “Purolight A-100” was 98%. proposed mechanism consists in formation complexes with functional phosphor basics sulfate groups sorbents. Sorption rhenium...