abstract |
PROBLEM TO BE SOLVED: To provide a method for producing uncolored t-CHDA with a high isomerization ratio by a simple operation. SOLUTION: The cis-1,4-cyclohexanedicarboxylic acid is heated in an atmosphere of gas having an oxygen concentration of 2% by volume or less to isomerize to trans-1,4-cyclohexanedicarboxylic acid. A method for producing -1,4-cyclohexanedicarboxylic acid. |