反应详情

In another embodiment, the invention encompasses a process for recycling 3-isobutyl glutaric anhydride comprising: preparing a compound of formula 24 from 3-isobutyl glutaric anhydride by the process according to claim 29; crystallizing the recovered compound of formula 24 from an organic solvent; removing the crystals from the organic solvent; combining the remaining organic solvent with an acid to obtain a first mixture; maintaining the first mixture at a temperature of about 60° C. to about 130° C., to obtain 3-isobutyl glutaric acid; combining the 3-isobutyl glutaric acid with acetic anhydride to obtain a second mixture; heating the second mixture to a temperature of about 125° C. to about 145° C. to obtain 3-isobutyl glutaric anhydride; and recovering the 3-isobutyl glutaric anhydride from the second mixture.

1. customto obtain a second mixture
2. temperatureheating the second mixture to a temperature of about 125° C. to about 145° C.