Analysis of Treatment Methods of Coal Crude Benzene
Chemistry for Sustainable Development
||coal crude benzene, sulphuric acid refining, catalytic hydrorefining
Institute of Coal Chemistry and Material Science, Siberian Branch, Russian Academy of Sciences, Kemerovo, Russia
Boreskov Institute of Catalysis, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
Organic synthesis products are widely used in the daily life beginning with medicinal, sweet preparations, lacs, dyes up to plastic, rubber, etc . Benzene that is amongst the top ten largest of the biggest substances of the chemical industry being highly liquid and high priced products. In this regard, this product is manufactured both at petrochemical enterprises and their by-product coking plants. Coal crude benzene contains unsaturated and sulphur compounds and it is required to preliminarily purify it from these undesirable impurities to obtain pure products from it. Even insignificant amounts of sulphur in benzene and toluene when using them in organic synthesis processes cause fast poisoning of the catalyst, and resinous substances formed resulting from polymerization of unsaturated compounds cover the catalyst surface and thereby deactivate it. Analysis of the published works on purification methods of coal crude benzene from unsaturated and sulphur compounds was performed in the present review. The advantages and shortages of the known methods were considered. Prospects of ozonolytic purification of coal crude benzene were demonstrated.