METHOD OF PRODUCING PURIFIED PROPIOLIC ACID

摘要

PROBLEM TO BE SOLVED: To provide a safe and industrially advantageous process for producing purified propiolic acid. SOLUTION: This propiolic acid-producing process comprises the step (A) where crude propiolic acid is distilled in the presence of water and the step (B) where the propiolic acid obtained in the step (A) is distilled at the temperature and for the time satisfying the following formula (1):θt<=exp[(1.933×104)×(1/T)-45.41] (whereθt is the distillation time in minutes after water is removed; and T is the temperature of the heat medium for distillation in deg.K).