What material is used for the plate heat exchangers in mixed acid?
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A mixed acid of 20% sulfuric acid + 45% phosphoric acid, intended to be heat-exchanged using a plate heat exchanger (medium temperature
What about Hastelloy or titanium?
Titanium won’t work. Harbin alloy performs well with sulfuric acid, but not so well with phosphoric acid. Does anyone know which company has graphite plate heat exchangers? What’s the price? Compared to Hastelloy.
It is better to use tetrafluoride to impregnate the pores of impermeable graphite blocks for heat exchangers
30 is the material with the greatest resistance to chloride and fluoride ions. But what we use the most is still 254 SMO, because it offers good quality at a low price.
Titanium plates cannot be used; Hastelloy C-276 can withstand mixed acids.