Phosphoric acid evaporation concentration
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What material should be used for the evaporation and concentration of phosphoric acid? Is there any better manufacturing process? I would appreciate it if the masters could offer their guidance
What are the process conditions used by the poster? We have equipment and fittings for working with PTFE, enamel, and spraying; we have extensive experience in evaporating and concentrating liquids. We also have pilot-scale testing facilities – QQ77390271. Let’s communicate and consider conducting a pilot test here!
It depends on how concentrated it is. For concentrations below 30, both 2205 duplex steel and 316L work well; for concentrations of 85%, FV520B and Hastelloy can be tried. Some suggest using amorphous alloys (which are difficult to work with), but there are no practical examples of this. For ceramics and glass-lined materials, there must be no fluoride ions in the acid; according to corrosion data, 85% of cases show no problems. 100% are only precious metals such as tantalum.