Structured packing can improve ethylene oxide absorption and stripping through high mass-transfer efficiency, low pressure drop and low liquid holdup. Absorber design must control heat release, liquid temperature and reactor-loop backpressure, while stripper design must limit temperature, residence time and glycol formation. Packing geometry, gas and liquid distribution, material cleanliness, mist removal, cooling and total ethylene oxide inventory must be evaluated as one integrated system.

Structured packing can improve hydrogen peroxide vacuum concentration through low pressure drop, low liquid holdup and efficient water removal. These features help lower operating temperature and reduce peroxide residence time. However, trace metals, incompatible materials, contaminated surfaces and stagnant liquid may accelerate decomposition and oxygen generation. Packing geometry, material qualification, fabrication cleanliness, liquid distribution, mist removal, drainage and vacuum-system safety must therefore be evaluated together.

Structured packing can improve wet-chlorine drying by providing efficient contact between chlorine gas and concentrated sulfuric acid with low pressure drop. Performance depends on sulfuric-acid concentration, temperature, circulation and uniform liquid distribution. Packing, distributors and supports must withstand wet chlorine, dry chlorine and both concentrated and diluted acid. Gas distribution, acid cooling, mist elimination and startup or shutdown conditions must also be evaluated to protect downstream chlorine equipment.

Structured packing can improve epichlorohydrin purification through high mass-transfer efficiency, low pressure drop and low liquid holdup. Selection must consider water, hydrogen chloride, chlorinated by-products, salts and heavy residues because a material suitable for dry purified epichlorohydrin may not withstand a wet acidic crude stream. Packing geometry, feed pretreatment, decanter operation, liquid distribution, corrosion-resistant internals and heavy-bottom control must be designed together.

Structured packing is suitable for caprolactam vacuum distillation because low pressure drop and low liquid holdup help reduce reboiler temperature, thermal degradation and product discoloration. Selection must also address caprolactam crystallization in cold distributors, packing channels, walls and nozzles. Packing surface area, liquid distribution, heat tracing, vacuum stability, heavy-residue control, support-grid drainage and startup or shutdown procedures must be designed as one polymer-grade purification system.