97/02580 Methods for preparing and monitoring of heavy media in coal beneficiation

• Publisher: Elsevier Science
• Year: 1997
• Weight: 379 KB
• Volume: 38
• Category: Article
• ISSN: 0140-6701
• DOI: 10.1016/s0140-6701(97)91612-x

✦ Synopsis

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The paper descrihea the alkylation of benzene with ethylene over Y-type reoliie and under supercritical conditions in benzene solvent. Supercritical conditions result in a decrease in the catalyst deactivation rate and decreases the selectivity to by-products. The existence of some coke precursors that are partially removed from the catalyst surface has heen shown through experiments. Formation of by-product xylenes were decreased, which was attributed to a high diffusivity in the supercritical fluid. 97102567 Concentration of coal fines by flotation Malysa. E. and Sanak-Rydlevskan. S. Olqnshch. Rud. 1996, (4). 24-26. (In Russian) Gas coal flotation was studied at three coal mines in Poland. Coal fines were observed to float well and their commercial concentration permits the production of high-grade concentrates. The reagents used in the process include gas oil (collector) and various frothers, e.g. pine oil, heavy alcohols, flotanol and octanol.

97102568

The design of the Landau coal processing plant, South Africa