Benzene insoluble pyrolysis products

Recovery and Analysis of Pyrolysis Products. Frequently the quality of electrode binder pitches is assessed partially on the basis of how much material they contain that is insoluble in benzene (BI) and quinoline (QI) (8,9,10). In addition, the pyrolysis and coking of... 

Only a small amount of gaseous products was obtained. After keeping the pyrolysis mixture for 46 hours at 430-490 °C, 72 % of the starting material was converted to give a residue insoluble in benzene, along with only small amounts of methane and hydrogen. A similar course of events occurred with the substance group A already at about 230 °C however, no benzene-insoluble constituents appeared. 

The effect of additives on the asphaltene from the Catalytic Incorporated (Cat. Inc.) coal liquid product was studied. Asphaltene is defined as the pentane insoluble but benzene soluble part of the coal liquid. The fractionation procedure has been described in detail elsewhere(l) and is shown schematically in Figure 1. Some work was also done with A240 petroleum pitch. Elemental analysis for the Wyoming sub-bituminous coal. Cat. Inc. coal liquid product, and Cat. Inc. asphaltene and A240 petroleum pitch are shown in Table I. Measured amounts of the additive compounds to be studied were added to the Cat. Inc. asphaltene and petroleum pitch. The samples were pyrolyzed and the pyrolysis residues examined by cross polarized light microscopy. Elemental analyses of the residues were done. 

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