The 8AQ was crushed into smaller pieces, poured into a three-neck round-bottom flask, and poured into 15 mL of cyclohexane. The flask was set on a magnetic stirrer, a cooler and a scrubber were installed. The resulting solution was heated to 95ºC. When the reaction mixture began to boil, 5 mL of cyclohexane was added. It was waited until it came to a boil again, and after 3 minutes another portion of cyclohexane (in the amount of 5 mL) was added. The temperature was increased to 105˚C. Maintaining the set temperature, 5 mL of cyclohexane was added three times each. Finally, activated carbon was added and stirred for half an hour. It was strained hot through a fluted filter into a vessel with nitrogen.