Questions regarding phthalic anhydride distillation
Thread Content
Dear seniors, I keep encountering errors when using Aspen to simulate the distillation of phthalic anhydride; I’m not sure why. The main component of the feed is benzoic acid (boiling point 249 degrees Celsius), at a rate of 115.8 kg/h ； Benzophenone (boiling point 290 degrees Celsius) 121.2 kg/h ； Phthalic anhydride (boiling point: 284.5 degrees Celsius) at 5334 kg/h. Now, I want to separate phthalic anhydride to achieve a purity of 99.9%. However, using Aspen for simulation always yields incorrect results. I really can’t find the reason; I hope those with more experience can offer some guidance! I don’t know how to handle the phthalic anhydride simulated distillation section, or which tower module to use. Thank you first! ! !
It’s hard to explain this clearly; uploading an Aspen .BKP file might help identify the cause.