| 摘要 |
<p>PROCESS FOR PRODUCING CARBOXYLIC ACIDS AND AROMATIC CARBOXYLIC ACIDS A process for producing carboxylic acid from carbonaceous material by treating a mixture of a carbonaceous material, water, and a water soluble reagent comprising a Group Ia or IIa metal formate, acetate, or propionate, the reagent producing an alkaline solution by hydrolysis, with oxygen, under conditions sufficient to convert the carbonaceous material to a carboxylic acid salt of said reagent; then removing water from the mixture; then treating the mixture with an acid of the reagent to convert the carboxylic acid salt to a carboxylic acid precipitate and the reagent; and then separating the aromatic carboxylic acid from the reagent. In one embodiment ah aromatic carboxylic acid is produced from aromatic material. In another embodiment an isomerized aromatic carboxylic acid is produced by treating a mixture of an aromatic material, water, and a water soluble reagent comprising a Group Ia or IIa metal with oxygen under conditions sufficient to convert at least a portion of the aromatic material to an aromatic carboxylic acid salt of the metal; isomerizing the aromatic carboxylic acid salt by heating without converting the aromatic carboxylic acid salt to an aromatic carboxylic acid salt of a different Group Ia or IIa metal prior to isomerizing; converting the isomerized aromatic carboxylic acid salt to isomerized aromatic carboxylic acid, and regenerating the reagent; recovering the isomerized aromatic carboxylic acid, and recycling the reagent thusly regenerated to supply a portion of the reagent required for producing the aromatic carboxylic acid salt. In one embodiment the water soluble reagent is potassium carbonate, or potassium bicarbonate or mixtures thereof.</p> |
