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Hexamethylenetetramine (HEXAMINE or UROTROPIN)

Hexamine Liquid Phase Process:

  • Liquid Ammonia is evaporated and fed into the reactor system where it reacts with a formaldehyde solution to hexamine molecules which are dissolved in a mother-liquor
  • The Mother-liquor is fed to a crystallization unit where the hexamine crystals are formed
  • The hexamine crystals are separated in a centrifuge and the hexamine is subsequently dried in a fluidized bed drier.
  • The residue mother-liquor from the centrifuge is recirculated to the reactor 
  • Key features of the product are:
    • pure white and crystalline structure
    • very good flow characteristics
    • stabilization with SiO2 is possible  

Hexamine Gaseous Phase Process:

  • Liquid Ammonia is evaporated and feed into the reactor system where it reacts with the formaldehyde gas from the formaldehyde reactor to hexamine molecules which are dissolved in a mother-liquor
  • The Mother-liquor is fed to a crystallization unit where the hexamine crystals are formed
  • The hexamine crystals are separated in a centrifuge and the hexamine is subsequently dried in a fluidized bed drier
  • The residue liquor from the centrifuge is recirculated to the reactor
  • Key features of the product are:
    • pure white and crystalline structure
    • very good flow characteristics
    • stabilization with SiO2 is possible