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Allyl chloride is a chemical product used as an intermediate in the production of a large number of valuable derivatives. It is synthesized mainly by direct chlorination of propylene, but there is still a great diversity of criteria about the most suitable operating conditions of the synthesis reactor. The objective of this work is to conduct a conceptual analysis that allows a better approach to the optimal operating conditions. First, qualitative and quantitative evaluations were carried out to assess the effect of a group of variables selected as design variables on the feasibility of the process. The response variables considered in the comparison were reactor volume, volumetric productivity and instantaneous and global fractional yields. Mathematical modeling techniques were used to compare the isothermal and adiabatic modes of operation for a plug flow reactor. This work demonstrated the greater technical feasibility of using the isothermal reactor. In this mode of operation, higher volumetric productivity is achieved with lower reactor volume and higher yields. It was also proved that for the same propylene: chlorine feed molar ratio, greater selectivity is achieved with the isothermal operation. © 2025, Escuela Politecnica Nacional. All rights reserved.