Composition of Distillates from Coal Extracts Derived by Solution in Processing Byproducts

The composition of distillates from coal extracts obtained by thermal solution in high-boiling hydrocarbon fractions—specifically, the processing products of oil and coal—is studied by means of FTIR spectroscopy and 1H NMR spectroscopy. The results obtained by these two methods are very similar. The distillates consist mainly of aromatic hydrocarbons with admixtures of oxygen- and nitrogen-bearing compounds. The distillate yield increases if heavy catalytic cracking gas oil is added to the solvent. The hydrocarbons present are characterized by a small content of aromatic carbon and hydrogen and a large content of substituents bound to aromatic rings. It is established that these distillates may be used to produce needle coke, since their composition resembles that of the traditional raw materials in this process.