| 摘要 |
<p>A process for treating wash water from the manufacture of terephthalic acid, wherein the wash water includes terephthalic acid, metal catalyst, and organic acid by-products. The process includes the steps of passing the wash water through a filter medium (13) to remove undissolved terephthalic acid solids, passing the filtered water through a cation exchange resin in hydrogen ion form (16) to remove the metal catalysts, and passing the water through an ion exchanger resin (19) to remove dissolved terephthalic acid and dissolved organic acid by-products. The treated water and certain components removed from the wash water are recovered and reused in the manufacture of additional terephthalic acid. An apparatus in which the process is practiced is also described and, after a quantity of wash water has been treated, the apparatus is regenerated with regenerants that are also recovered and reused in the manufacture of additional terephthalic acid.</p> |
