Meta - method for producing xylylene diisocyanates

Meta - method for producing xylylene isocyanates, generates a monohalogenated benzenes, and formaldehyde, and amide compound represented by the following general formula (1) is reacted in the presence of an acidic liquid, the bisamide compound a reaction step of, from bisamide compound, and dehalogenation step of substituting a halogen atom derived from the monohalogenated benzenes hydrogen atom, a heat thermally decomposing decomposition step bisamide compound halogen atom is desorbed, the wherein, in the reaction step, the acid liquid comprises a mineral acid, for monohalogenated benzenes, the equivalent ratio of the hydrogen atom of an inorganic acid, exceeded 14, the concentration of the acid in the acidic liquid, a 90 wt% excess, the reaction temperature has exceeded 10 ° C.. The general formula (1): [Formula 1] (In the general formula (1),