PROCESS FOR SYNTHESIS OF ACROLEIN

摘要

Provided is a technique for a process for the synthesis of acrolein by reacting glycerol with supercritical water and an acid. In a case where a reaction fluid having a high glycerol concentration is employed to improve the energy efficiency, the technique makes it possible to protect pipes and devices from clogging and wear, which are caused by the generation of by-products, and thus enables the synthesis to proceed stably with high yield. In an embodiment of the technique, the reaction fluid is adjusted to a glycerol concentration of 30wt% or less. Further, the embodiment comprises: cooling the reaction fluid to a temperature that can stop the reaction and that can keep the tar contained in the reaction fluid at a sufficiently low viscosity, namely, a temperature of 100 to 300°C; separating and removing carbon particles from the reaction fluid thus cooled; cooling the resulting reaction fluid to a temperature which is not higher than the boiling point of water and at which the tar contained in the reaction fluid does not stick to devices; and then evacuating the resulting system.