OXIDATION OF ANGREN BROWN COAL BASED ON A NITRATING MIXTURE FORMED IN THE PROCESS OF SYNTHESIS OF 2-METHYL-3(H)-6-NITROQUINAZOLIN-4-ONE

Аннотация

In this article, nitration reactions of 2-methyl-3(H)-quinazolin-4-one using nitrating mixture (HNO 3 +H 2 SO 4 ) were carried out. As a result, the mobile hydrogen atom located in the sixth position of the benzene ring in 2-methyl-3(H)-quinazolin-4-ones is exchanged for the -NO 2 group, resulting in the corresponding 2-methyl-3(H)-6-nitroquinazolin-4-one as a result of electrophilic coupling reactions. synthesized. In the process of obtaining the synthesized product, a large amount of nitrating mixture waste is generated. This mixture was applied to the oxidation process of Angren mine lignite. Oxidation process in nitric acid concentration from 5 to 15%, weight ratio of coal (organic part); When studying HNO 3 :H 2 SO 4 = 1:0.2:0.4 to 1:1:2, it was shown that it is possible to increase the amount of humic acids in coal from 3.96% to 55.17%.