Method for Producing 2,2,4,4-Tetramethylcyclobutane-1,3-dione and 2,2,4,4-Tetramethylcyclobutane-1,3-diol

摘要

PROBLEM TO BE SOLVED: To easily carry out a dimerization reaction of dimethylketene at a reaction rate (reaction time) suitable for actual production by using a general-purpose low boiling point solvent which is easy to handle in the production process as a solvent of dimethylketene. , 2,4,4-Tetramethylcyclobutane-1,3-dione is provided. SOLUTION: After dissolving dimethyl keten in a low boiling point solvent that can be easily removed, the temperature is set to be equal to or higher than the boiling point at normal pressure and lower than the boiling point of the solvent at reaction pressure under pressure to distillate dimethyl keten. The reaction can be accelerated, the time required for removing the solvent can be shortened as compared with the high boiling point solvent, and the production can be performed in a shorter time than before. [Selection diagram] None