Catalyst Gauze

Catalyst Gauze

We have 70 years of experience producing catalyst gauzes made from platinum group metals. Our advanced engineering expertise provides design guidance for platinum catalytic gauze and active catchment (getter) gauze. We manufacture the platinum wire and then it is woven or knitted in the form of gauze. Our unique spacial knitted gauze with micro-turbulence flow supports fast detachment of reactants from the catalyst surface. Safina will also assay and process reclaimed gauze at our Texas facility for production of new gauze systems. Full analysis of spent gauze is provided to collect data on metal losses, proper reactions on gauze surface, and campaign efficiency.

Catalyst Gauze

 

  • ammonia oxidation for nitric acid production
  • hydrocyanic acid production for polymers
  • hydroxylamine sulfate production for organic synthesis
  • Product produced
  • Operating pressure
  • Ammonia concentration and loading
  • Reactor diameter
  • Average output per campaign
  • Ammonia conversion level per campaign

 

Catalyst Gauze Alloys and Applications
PtPdRh 92/5.4/3.5
PtPdRhRu 81/15/5.3/0.5
Nitric Acid (HNO3) Production
PtRh 92.5/7.5
PtRh 95/5
PtRh 90/10
PtPdRh 90/5/5
Hydrogen Cyanide (HCN), or
Hydrocyanic (Ammonocarbonous) Acid
PdW 95/5 Catchment Gauze

Platinum Gauze Advantages

Our unique technology can reduce your precious metal investment per reactor by 13-20% and reduce precious metal reaction losses by 5%. For Hydrocyanic Acid production, we offer a range of platinum rhodium gauze alloys to suite each production process. Below are just some of the advantages of our Platinum Catalyst Gauze Systems:

81% Platinum Gauze
substantially reduces capital cost as compared to the commonly-used 90% Pt gauze. Our customers have used this lower content Pt gauze for over 40 years. Our operating data confirm the same ammonia conversion rate and lifetime even with lower platinum content.

Platinum-Palladium-Rhodium-Ruthenium (PtPdRhRu) gauze
offers many technical advantages not available from other gauze suppliers. Ruthenium improves the mechanical characteristics of platinum, thereby improving its’ activity and selectivity. Also, ruthenium doubles the durability of the alloy and improves the high temperature strength of the catalyst gauze. Ruthenium also improves the short-term strength as shown by the wires resistance to breakage at much higher deformation velocities. This higher strength also prolongs the service lifetime.

Electrochemical activation
(ECA gauze) of the platinum catalyst gauze surface area elevates the concentration of dispersed platinum. This technique provides 10 times the active platinum surface area to reduce the temperature of the initial ammonia oxidizing reaction. The platinum gauze has reduced ignition time to quickly reaches maximum conversion efficiency in 8-10 hours instead of 4-8 days. No treatment is required prior to installation in the reactor.

Palladium-Tungsten (PdW5%) catchment gauze
is used for platinum recovery. The addition of tungsten, instead of the typical palladium-nickel alloy, increases the mechanical durability, improves heat resistance and accelerates diffusion of platinum into palladium by 50%.

Electrochemical activation of the Palladium-Tungsten (PdW5%) catchment gauze
includes application of a 0.1 micron platinum layer on the palladium wire. This feature allows reduction of the number of platinum/rhodium knitted gauzes per reactor to reduce your precious metal investment. The catchment gauze with Pt-layer performs the dual function of ammonia oxidation and platinum recovery. Reaction activity of the activated palladium gauze is equal to Pt gauzes immediately upon operation.

Images / Videos