2002•Chinese Journal of Explosives and PropellantsRequires access
Regioselective Nitration of Chlorobenzene with Nitric Acid on SO_4~(2-) /ZrO_2 Catalysts
Guang Cheng
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Abstract
The catalyst of SO 4 2- /ZrO 2 have been prepared and regioselectiveties of chlorobenzene minonitration on SO 4 2- /ZrO 2 catalyst were investigated. When the reaction temperatures was 30℃ for 30min, SO 4 2- /ZrO 2 by a calcination step for 3h at 500℃ enhanced the para selectivity of chlorobenzene nitration by using nitric acid as nitrating agent, up to an ortho para isomer ratio 0.23 in product distribution of chlorobenzene mononitration, and the yield of chlorobenzene mononitratio was 55.5%. The catalyst could be re utilized up to four times with a little decrease in activity.