PRODUCTION OF MIXTURE CONSISTING ESSENTIALLY OF NAPHTHALENES FROM LIQUIFIED COAL OIL

摘要

PURPOSE: To efficiently obtain a mixture consisting essentially of (methyl) naphthalene from a heavy naphtha fraction of a liquefied oil by carrying out the dehydrogenating treatment in the presence a dehydrogenating catalyst under relatively mild reactional conditions. CONSTITUTION: The extraction treatment of a heavy naphtha fraction or a light oil fraction by atmospheric distillation of a liquefied oil from bituminous coal or sub-bituminous coal with an acid or a base is carried out and the dehydrogenating treatment of the resultant neutral oil is then conducted in the presence a dehydrogenating catalyst under heated conditions to afford the objective mixture. Furthermore, the reaction is preferably carried out by using, e.g. 0.5-5 pts.wt. palladium based on 100 pts.wt. liquefied oil at 200-400 deg.C reactional temperature for about 2-10hr reactional time.