CHEMICAL-ANALYSIS OF HIGH ASH BRAZILIAN COAL-TAR .3. HYDROCARBON CHARACTERIZATION

In this paper we show the total analysis of the hydrocarbon fractions obtained from the chromatographic fractionation of a coal tar cut, pre viously described. All fractions were analyzed by Gas Chromatography c oupled to Mass Spectrometry using a non-polar capillary column. A grou p-type distribution of aliphatic, olefins and monoaromatic hydrocarbon s was found in the first three fractions obtained (I, II and III). In fractions IV and V polyaromatics with two or more condensed rings were founded. Many of these hydrocarbons are recognized to be carcinogenic and mutagenic, including pyrene, chrysene and others.