| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for the heat isomerization of acid anhydride(s) including at least 4-methylhexahydrophthalic anhydride in the presence of a specific catalyst. SOLUTION: The method comprises carrying out a heat isomerization of the acid anhydride(s) including at least 4-methylhexahydrophthalic anhydride in the presence of specific potassium and/or sodium salt(s) as a stereoisomerization catalyst. COPYRIGHT: (C)2004,JPO
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