Problems with the acetic acid distillation tower
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I’m currently designing an acetic acid distillation tower, but I’m not sure what material to use. I would appreciate some advice from those who are familiar with this topic. Thank you!
Acetic acid corrosion is determined by concentration and temperature; 316L is used at low temperatures, while the distillation temperature should be above 100°. If impurities are present, it is recommended to use 904L, 254SMo, etc
Depending on the purity of acetic acid, for 80% purity, titanium must be used at 118 degrees
I have previously been exposed to the use of zirconium materials or zirconium composite plates in equipment for acetic acid and acetic anhydride. I just checked some information online; austenitic super stainless steels are more cost-effective: 6-molybdenum super austenitic stainless steels contain 6% or slightly more molybdenum, with AL-6XN and 254 SMO (S31254, S31252) being representative examples ； The common feature of the 6 molybdenum-based super austenitic stainless steel family is their very high resistance to pitting and crevice corrosion.
http://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1435395&highlight=%B4%D7%CB%E1 Check out this post; it might be useful