Specifying a sintered stainless steel powder filter cartridge in refinery and petrochemical assets is a metallurgical and process decision, not a catalog pick. Formed by cold-pressing 316L/304L stainless steel powder and solid-state sintering at 1,100–1,300°C, the cartridge yields a monolithic, porous tube with 30–50% engineered porosity and absolute ratings from 0.5–70 µm. Its tortuous, 3D-interconnected pore network enables depth filtration—capturing solids throughout the wall rather than on a surface skin—with no binders to delaminate or shed.
Sintered Stainless Steel Powder Filter Cartridge in FCC Slurry Service
The primary application is catalyst recovery: in FCC and hydrotreating, zeolite/alumina fines escape reactors; the cartridge retains them (outside-in) for backwash as concentrated slurry, returning value instead of landfill waste. For precious-metal hydrogenation (Pd/C, Pt/C), 0.5–5 µm ratings recover >99% catalyst. FCC slurry-oil filtration handles 1,000–3,000 ppm fines in high-viscosity hydrocarbon at ~350°C continuous, with backflush excursions to 650°C. Other duties: polymer melt gel removal, amine/glycol polishing, lube/jet-fuel clarification.
Comparison: Powder-Sintered vs. Wire Mesh vs. Polymer
Selection Logic
Alloy: 316L default for chloride/acid; sour gas (H₂S/CO₂) demands lab-corrosion data—upgrade to Hastelloy/Inconel/Monel if marginal. Housing: HIC-resistant carbon steel (NACE MR0103) or 316L. Micron rule: FCC fines 5–20 µm; precious-metal 0.5–5 µm; polymer melt 10–25 µm. Over-specifying raises ΔP and blinding; under-specifying contaminates downstream.
Regenerability & Economics
CIP (alkali soak → high-pressure rinse → acid wash → bubble-point verification per EN 10204 3.1/3.2) restores >90% permeability. Life extends to years; high-temp bake must avoid prolonged carburizing embrittlement.
Engineering Support for Your Petrochemical Filtration Specification
Submit your stream data—flow, T, contaminant PSD, recovery aim—and receive matched alloy, rating, and TCO comparison.