A modified molten salt reactor and an on-line gas chromatographic analysis system were used to obtain yield, conversion, and product distribution data for the vaporphase nitration of normal butane. The effects of temperature (385°t o 455°C ), mole ratio of hydrocarbon to nitric acid (3-to-7) and total reactant flow rate (0.433 to 1.235 g-mol/min) were studied. Statistical methods were applied to correlate and