The development of alumina based porous materials is based on increasing the inner surface area to create more void space and capacity to capture catalyst poison compared to the inert ceramic top layers. We produce most inert ceramic top layers in porous alumina materials and we are also able to produce tailor made on request.


  • Naphtha Hydrotreating (NHT)
  • Distillate Hydrocracker (DHC)
  • Hydrodesulfurization (DHS)
  • Hydrodenitrogenation (HDN)


  • Reduce pressure drop built-up
  • Capture particles from feed stream
  • Trap soluble iron
  • Capture of catalyst poison
Macro Por® rings


  • More effective entrapment of the larger particulates and soluble iron from the feed
  • Reduce the pressure drop built-up in the bed
  • Contain a high void fraction
  • Protection of the catalyst bed from fouling

Rest-O-Por® rings


  • Specially developed to trap finer particles
  • Reduce pressure drop built-up
  • High void fraction
  • Protection of the catalyst bed from fouling

Rest-O-Por® spheres


  • Developed to trap small particles in its pores
  • The large surface areas (> 250 m2/g) provide a huge capacity to trap all type of fines from the feed stream
  • Excellent crushing strength with high absorption rates

The mixture of clay can be adjusted to special requirements or demands in case of need.
For additional information, support or (special) requests, please contact our sales department.

Design recommendations

We are able to make design recommendations for your grading loading diagram

Grading production

We are able to produce grading made from your regenerated catalyst

Grading customization

We customize your grading: any combination of shape and material is possible based on the requirements

Got a mass transfer challenge?

We provide the solution!

Together we achieve optimum performance of your application(s). Please feel free to contact us with any mass transfer related challenge.

+31 10 231 0260


Boezemweg 5

3255 MC Oude-Tonge

The Netherlands