Structured packing can improve seawater vacuum deaeration by providing high oxygen-transfer efficiency with low pressure drop. Selection must account for seasonal water temperature, vacuum level, liquid distribution, chloride corrosion, mineral scale, biofouling and suspended solids. Plastic or metallic packing materials require application-specific compatibility review, while supports, mist eliminators and distributors must be evaluated as part of the same system. Air leakage should always be checked when outlet oxygen increases.

Structured packing can improve acrylonitrile recovery and purification through high separation efficiency, low pressure drop and low liquid holdup. Packing selection must account for HCN separation, acetonitrile by-product recovery, acrylonitrile polymerization, inhibitor distribution, catalyst fines, salts and heavy residues. High-efficiency structured packing is best suited to clean purification sections, while dirty quench or heavy-bottom duties may require more fouling-tolerant internals.

Structured packing supports TDI vacuum purification through low pressure drop, low liquid holdup and high separation efficiency, helping reduce bottom temperature and thermal degradation. TDI service also requires strict moisture exclusion because water can generate insoluble deposits. Packing geometry, feed cleanliness, residual solvent and acidic contaminants, heavy-bottom withdrawal, reboiler residence time, complete drainage and dry installation must all be evaluated together.

Structured packing can support electronic-grade ammonia purification through high separation efficiency, low pressure drop and low liquid holdup. The system must remove moisture, lubricant oil, noncondensable gases, particles and trace contaminants while preventing recontamination from packing, distributors, piping, storage and sampling equipment. High-pressure hydraulics, small-column wall effects, feed oil separation, surface cleanliness and qualified downstream handling must all be evaluated.

Structured packing can improve green-methanol purification through high separation efficiency, low pressure drop and low liquid holdup. Carbon dioxide hydrogenation can create a high water load together with dissolved gases, dimethyl ether and other oxygenates. Packing and liquid distributors must be designed for minimum, normal and maximum plant loads because variable renewable operation may reduce wetting at turndown. Main rectification, light-end removal and wastewater methanol recovery should be evaluated as separate duties.