| 摘要 |
Halogen ions and/or heavy metal ions such as CO, Mn, Fe, Ni, Cr in lower aliph. monocarboxylic acid solns. generated in the manuf. of terephthalic acid are recovered by adsorption on an anion-exchange resin followed by elution with H2O or a lower aliph. monocarboxylic soln. contg. > 15% H2O. Anion-exchange resins of either halogen or lower aliph. monocarboxylate-type are used.
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