Multistep cascade continuous flow synthesis of AOS based on microreactor

Abstract

Sodium alpha-olefin sulfonate (AOS) is highly esteemed for its exceptional properties and widespread utility in diverse industrial applications. This study introduces a pioneering investigation into the sulfonation of olefins, employing an innovative microchannel continuous sulfonation setup. The primary focus lies in process intensification through a multistage continuous flow synthesis approach, exploring the fundamental laws governing the influence of various process conditions on the generation process. Key process parameters, including sulfonation temperature, molar ratio of raw materials, sulfonating agent concentration, material flow rate, residence time, hydrolysis temperature, and hydrolysis time, are systematically examined to elevate the final product's quality. By leveraging 1-tetradecene as the primary feedstock and successfully implementing the microreaction minipilot platform, we achieve continuous synthesis of olefin sulfonate. Notably, post-hydrolysis, we attain an outstanding content of active substances exceeding 90%. This research showcasing the successful application of microchemical technology. By focusing on process enhancement and exploring influential factors, our research results highlight the transformative potential of microchemical technology for process intensification. The developed multistep cascade continuous flow synthesis of AOS demonstrates promising prospects for process intensification in the production of valuable sulfonated compounds.