Component analysis of products from brown coal oxidation

Brown coal was extracted by petroleum ether and chloroform by stages,the residues after extraction were oxidized with NaOH and H2O2,the extraction of products of oxidation were same to coal,GC/MS was used to analyze the components.The results show that 46 compounds are identified from petroleum ether extraction of coal.The main constituents are hydrocarbon(80.2%) and esters(14.3%).Comparing to coal,44 compounds were identified from petroleum ether extraction of oxidation coal.The relatively content of alkyls(43.3%) decreased,but esters(18.9%),alcohols(15%),aroma hydrocarbons(6.5%),hydroxybenzene(6.1%),alkene(4.6%),acids(2.2%) increased.It indicted that other available chemicals can be obtained from coal oxidation.