What is the mechanism of SO3 dialysis?
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SO3 has a strong effect on the dialysis capacity of resin-lined equipment; can neither PTFE nor PFA prevent it? It can penetrate through plastic – what is its mechanism of penetration? Small molecular groups, such as CL- and F-, have their penetration properties that are easy to understand. SO3 can also be considered a large molecule; then why does it have such high penetration ability?
Is there such a saying? What methods are used for corrosion protection of the equipment used in the wet acid production process?