Does the distillation principle change during high-purity distillation?
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For example, if I want to achieve a purity of 99.99%, and the contents of the two components differ so greatly, does the principle of distillation change in such cases? Is the volatilization and condensation at this time the same as at the start of feeding?
How could the principles of distillation change? Theoretically, as long as the efficiency of your distillation tower is high enough, you can obtain the desired concentration.
As long as it is distillation, the principle remains the same; it’s just that it’s difficult to achieve such high precision solely through distillation, right? It is theoretically possible, but in practice it is estimated to be very difficult
Reply to 2# *ngguanglueguo: Thank you for your reply :)
Reply to 3# Little Turtle: I also found in the literature that high-purity products are generally obtained through special distillation; it is usually very difficult to achieve such high purity using ordinary distillation
It depends on the specific circumstances; the principles of distillation remain unchanged, but the thermodynamic description of distillation may change. Thermodynamics is a description of macroscopic phenomena; as for the purity level of 100 ppm mentioned by the original poster, it’s unknown whether thermodynamics still applies in such cases and what will happen. I encountered a separation process in the materials science field where a purity level of 20 ppm was required; however, the calculated results did not match the actual values at all. When the purity reaches the ppm level, one must be careful with their calculations, as the thermodynamics at this point can be completely incorrect.
Reply to 6# wss20011: Maybe my wording was incorrect; actually, I just wanted to ask about the situation you mentioned. Should the thermodynamic data algorithm be changed in the case of extreme concentrations?
It shouldn’t change; under normal circumstances, ordinary distillation cannot achieve such a high level of purity
Reply to 5#: What does \"seeking defeat\" mean? What do you mean by \"special distillation\"? Please enlighten me
Reply to 6# wss20011: It seems you are quite skilled in distillation. Can titanium tetrachloride be purified to 99.99% through distillation?