Liquid filtration in the chemical industry

Many chemical reactions are initiated and aided by catalysts. These are often made of precious metals such as Palladium (Pd/C), Platinum (Pt/C), Rhodium (Rh/C), Ruthenium (Ru/C) etc. Typically five percent and ten percent palladium/platinum/rhodium/ruthenium on activated carbon/aluminum catalysts finds application in reactions like hydrogenation, reduction, oxidation etc. Since precious metal catalysts are expensive, their recovery is important from an economic and environmental point of view.

Often Raney Nickel is used as a versatile hydrogenation catalyst, which is widely used in laboratory and industrial hydrogenation processes. Some industries and products that take advantage of this process are:

  • Food
  • Aromatic
  • Rubber additives
  • Pesticide intermediates 
  • Fine organic chemical products
  • Pharmaceuticals
  • Petrochemicals 
  • Dyes & drugs intermediates
  • Caprolactam
  • Sorbitol

The challenge

While the catalyst is necessary, all particles have to be removed from the final product. During the catalyst's lifecycle, particles can be grinded off. A catalyst with a particle size of e.g. 25 micrometers (D50 value) can decrease significantly over time to e.g. 10 micrometers (D 50). To guarantee a stable flow or delta p in the process, a reliable and maintenance-free filter is required.

At the same time, the filter cake – expensive catalyst - must be recovered for reuse or refreshing.


The function

GKN Sinter Metals Filters offers customized self-supporting filter elements with filters up to 0.1µm as the finest filter grade in liquid. The patented metallic membrane, a dual sandwich design of two sinter connected powder grades, offers excellent cake release and improved flow compared to conventional designed filter. Designed metallic membrane SIKA-R AS for catalysts guarantee a perfect filtration and back pulse efficiency up to 0.1µm.

Due to the weld-free design with solid connection, our filter elements having a life cycle of 15 years based on application.


Why GKN Filters?

GKN Sinter Metals Filters is the leading manufacturer of porous sintered metal products. We offer a variety of solutions to fulfill customer requirements. We are familiar with various applications in chemical, food and beverage industries. Our products are used in gas- and liquid filtration, dampening, sparging, sensor protection, bulk handling and many more applications.

We offer solutions for high temperature and corrosive environments. Sintered filter elements made of stainless steels, bronze, nickel based alloys, titanium and several special alloys can be manufactured seamless up to 1,600 mm and length and 320 mm OD.