Method for isomerizing methyltetrahydrophthalic anhydride
AssigneeNan Ya Plastics Corporation
InventorsTE-CHAO LIAO, JUNG-JEN CHUANG, CHUNG-YU CHEN, JUNG-TSU WU
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Abstract
A method for isomerizing methyltetrahydrophthalic anhydride includes the following processes. A liquid reactant is provided. Under a condition of injecting nitrogen gas, an alkaline catalyst is added into the liquid reactant for an isomerization reaction, so as to obtain an isomerization product. The liquid reactant includes 3-methyltetrahydrophthalic anhydride and 4-methyltetrahydrophthalic anhydride. Based on a total weight of the isomerization product being 100 wt %, an amount of a methyltetrahydrophthalic anhydride dimer is lower than 1.6 wt %.
Claims10
A method for isomerizing methyltetrahydrophthalic anhydride, comprising:
- providing a liquid reactant which includes 3-methyltetrahydrophthalic anhydride and 4-methyltetrahydrophthalic anhydride;
- and
- under a condition that nitrogen gas is injected, adding an alkaline catalyst into the liquid reactant for an isomerization reaction, so as to obtain an isomerization product;
- wherein, based on a total weight of the isomerization product being 100 wt %, an amount of a methyltetrahydrophthalic anhydride dimer is lower than 1.6 wt %.
Dependencies are inferred from the claim text.