Quality standards for acetic acid solvents used in PTA production
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In the PTA production process, acetic acid is used as a solvent, with a consumption of around 40 kg per ton. However, certain quality requirements apply to acetic acid. Are there any additional requirements regarding substances such as propionic acid, iodine, and reducing impurities in acetic acid, in addition to the national standards for acetic acid? If so, what are these requirements? Meanwhile, what impacts will failing to meet the standards have on PTA production? O(∩_∩)O Thank you
This topic is suitable for discussion in the petrochemical deep processing sector; I’ll help you shift the conversation there. I hope more people will participate in the discussions
From what I understand at the moment, many operations and production processes are relatively independent, which prevents production demands and targets from being closely linked to supply and distribution； 1. There seems to be no actual data available to confirm the impact of propionic acid on PTA ； 2. Some technical personnel in the PTA industry require that the iodine content be less than 10 ppb; however, a few years ago, when there was no technology for thoroughly removing iodine from acetic acid, PTA products contained iodine levels above 10 ppb, sometimes even at the ppm level. After asking around, it was found that there isn’t really any significant difference ； Therefore, for this issue, I hope that professional production technicians from PTA factories can provide guidance. Thank you
The main requirement is that it should not have any effect on the cobalt-manganese catalytic system in the system, such as the formation of precipitates or complexes; furthermore, the valence state of the catalyst must not change, otherwise its catalytic properties will be lost.