Chloralkaly & Plastics

Graphite stands out as the ideal material for handling hydrochloric acid due to its complete corrosion resistance across all concentrations and typical temperatures. Standard processes involve:

• Production of hydrochloric acid using a synthesis unit through the flame reaction of hydrogen with dry chlorine gas.
• Absorption of hydrochloric gas into water to produce a hydrochloric acid solution, typically achieved through a falling film absorber or absorption column.
• Concentration of hydrochloric solution through stripping, with or without azeotrop breaker systems.
• GT has developed an enhanced design with advanced features for equipment to ensure a reliable and seamless process. The use of GT FLON grade enables.GT to handle hot and highly concentrated caustic soda, a capability not matched by competitors’ carbon-based materials.

The monomers that are found in many plastics include organic compounds like ethylene, propylene, styrene, phenol, formaldehyde, ethylene glycol, vinyl chloride and acetonitrile.

Chemical reactions to produce monomers often involved corrosive media. For example VCM monomer of PVC involve hydrochloric acid.

TDI and MDI, precursors for polyurethane resins are using as well graphite equipment due to hydrochloric acid in their processes of manufacturing.

Organic silicons processes with hydrochloric acid

ECH (epychlorhydrin) precursor epoxy resin is using graphite equipment.