摘要 |
<p>A process for converting alkyl-substituted aromatic hydrocarbons, such as p-xylene or 2,6-dimethyl naphthalene to their corresponding dicarboxylic acids is disclosed, said process comprising contacting the alkyl-substituted aromatic hydrocarbon with a gaseous mixture containing oxygen, NOx, where x is 1 or 2, and an inert gas, and heating the resulting mixture at a temperature from 90 °C to 250 °C and at a pressure of from 300 psi to 2500 psi for a period of time sufficient to convert the alkyl substituents on the aromatic hydrocarbons to carboxyl groups.</p> |