Ceramic orifice corrugated packing is formed from chemical porcelain — kaolin-based clay pressed into thin corrugated sheets, perforated, then fired into hard blocks. The plastic version is welded from foils; the ceramic version gets its strength and heat tolerance from the firing, which is why it can sit in a column running near 1000°C without deforming. The sheets are set at a 45° or 60° angle and turned against each other, so gas and liquid follow crossing, tortuous channels and keep mixing down the bed.
The surface does a lot of the work. Porcelain is hydrophilic, so liquid spreads into a thin, even film that drains fast and leaves little holdup in the pack. That quick film turnover keeps hot spots, polymerisation and coking down, which is a real advantage in reactive and fouling-prone distillation. The perforations add cross-mixing between channels and even out the liquid load, so the separation stays stable across a wide band of gas and liquid rates.
Material choice usually comes down to three options, and it pays to match the packing to both the temperature and the chemistry before deciding:
| Material | Temperature | Corrosion | Best fit |
|---|
| Ceramic | Up to ~1000°C | Resists acids, chloride, H2S | Hot, corrosive, reactive distillation and acid recovery |
| Metal | Very high | Corrodes in acids and chloride | Clean, hot, non-corrosive duty needing high capacity |
| Plastic | Up to ~150°C (PTFE higher) | Excellent vs acids and alkalis | Cool, corrosive scrubbing and stripping |
Typical ceramic duty covers sulfuric acid drying and absorption, nitric acid concentration, chlorinated and halogenated organic distillation, and gas purification in fertiliser and petrochemical plants, including vacuum columns where a low, steady pressure drop matters. Two practical points at install: the blocks are heavy and brittle, so they go in by hand in layers with extra care at the wall, and each layer is turned against the one below to keep the flow crossing. Loaded and installed properly, a ceramic bed runs for years in service that would corrode metal or melt plastic.
