Micro low-temperature distillation units produce high-purity products

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Recently, I have been working on a small-scale purification project for high-purity electronic specialty gases, and I’ve encountered quite a few issues related to equipment selection. Especially at a scale like ours, which lies between a laboratory and pilot plant, large distillation columns require a lot of space and significant investment, while traditional laboratory equipment struggles to meet the purity requirements. We have attempted to introduce a cabinet-type distillation unit; it covers an area of approximately 2m×2m, with a height that can be adjusted between 2 and 3 meters. It can operate under conditions ranging from negative pressure to high pressure, and its temperature control accuracy reaches ±0.1℃. What surprised me the most was its high-vacuum multi-layer insulation design, which enables very good control of heat loss even at low temperatures of -196°C. At present, we mainly use it to treat specialty gases in the semiconductor panel industry, with a purity level of over 6N and a yield of over 90%. Moreover, it starts up quickly and can reach equilibrium within 24-48 hours, unlike traditional towers which require a much longer time. Are there any colleagues using similar cabinet-type distillation units? What gases are you dealing with? Have you encountered any issues with the operation? For example, the selection of cooling sources, maintenance cycles, and the impact of large fluctuations in raw material impurities on tower efficiency – feel free to share your thoughts. I can also share some practical experience from my side, so we can discuss it together.