# Filtration - Stage 2 (technology) internal name `filtration-mk02` · tier 6 (pY science pack 3, [tier 6](https://factorio.kalzumeus.com/tier/6.md)) HTML page: https://factorio.kalzumeus.com/tech/filtration-mk02/ ## Cost 1500 units of (1 × [pY science pack 3](https://factorio.kalzumeus.com/item/py-science-pack-3.md), 2 × [Chemical science pack](https://factorio.kalzumeus.com/item/chemical-science-pack.md), 3 × [pY science pack 2](https://factorio.kalzumeus.com/item/py-science-pack-2.md), 6 × [Logistic science pack](https://factorio.kalzumeus.com/item/logistic-science-pack.md), 10 × [pY science pack 1](https://factorio.kalzumeus.com/item/py-science-pack-1.md), 20 × [Automation science pack](https://factorio.kalzumeus.com/item/automation-science-pack.md)), 180 s each. ## Requires (2) - [Lithium Processing](https://factorio.kalzumeus.com/tech/lithium-processing.md) - [Small parts - Stage 3](https://factorio.kalzumeus.com/tech/small-parts-mk03.md) ## Leads to (2) - [Korlex upgrade](https://factorio.kalzumeus.com/tech/korlex-upgrade.md) - [Production science pack](https://factorio.kalzumeus.com/tech/production-science-pack.md) ## Unlocks (10 recipes) ### Filter air pollution (`air-pollution`) - 40 s · tier 6 · productivity modules allowed - Ingredients: 1 × [Infused nexelit cartridge](https://factorio.kalzumeus.com/item/nexelit-cartridge.md) - Results: 1 × [Saturated nexelit cartridge](https://factorio.kalzumeus.com/item/saturated-nexelit-cartridge.md) - Made in: CO2 Absorber - Unlocked by: [Filtration - Stage 2](https://factorio.kalzumeus.com/tech/filtration-mk02.md) ### Extract CO2 from nexelit cartridges (`co2`) - 3 s · tier 6 · productivity modules allowed - Ingredients: 1 × [Saturated nexelit cartridge](https://factorio.kalzumeus.com/item/saturated-nexelit-cartridge.md), 100 × [Slaked lime](https://factorio.kalzumeus.com/fluid/slacked-lime.md), 2 × [Activated carbon](https://factorio.kalzumeus.com/item/active-carbon.md) - Results: 600 × [Carbon dioxide](https://factorio.kalzumeus.com/fluid/carbon-dioxide.md), 1 × [Infused nexelit cartridge](https://factorio.kalzumeus.com/item/nexelit-cartridge.md), 10 × [Ash](https://factorio.kalzumeus.com/item/ash.md) - Made in: High pressure furnace MK 01, High pressure furnace MK 02, High pressure furnace MK 03, High pressure furnace MK 04 - Unlocked by: [Filtration - Stage 2](https://factorio.kalzumeus.com/tech/filtration-mk02.md) ### CO2 Absorber (`co2-absorber`) - 1 s · tier 6 - Ingredients: 30 × [Complex circuit board](https://factorio.kalzumeus.com/item/advanced-circuit.md), 50 × [Steel plate](https://factorio.kalzumeus.com/item/steel-plate.md), 2 × [Filter MK 01](https://factorio.kalzumeus.com/item/carbon-filter.md), 50 × [Nexelit plate](https://factorio.kalzumeus.com/item/nexelit-plate.md), 10 × [Special small parts](https://factorio.kalzumeus.com/item/small-parts-03.md) - Results: 1 × [CO2 Absorber](https://factorio.kalzumeus.com/item/co2-absorber.md) - Made in: Burner assembling machine MK 01, Burner assembling machine MK 02, Burner assembling machine MK 03, Automated factory MK 01, Automated factory MK 02, Automated factory MK 03, Automated factory MK 04, Character, Character (flying), Mutagenic infusion, (flying) - Unlocked by: [Filtration - Stage 2](https://factorio.kalzumeus.com/tech/filtration-mk02.md) ### Phenol (`coal-phenol`) - 7 s · tier 6 · productivity modules allowed - Ingredients: 20 × [Coal](https://factorio.kalzumeus.com/item/coal.md), 1 × [Filtration media](https://factorio.kalzumeus.com/item/filtration-media.md) - Results: 10 × [Coke](https://factorio.kalzumeus.com/item/coke.md), 5 × [Phenol](https://factorio.kalzumeus.com/item/phenol.md) - Made in: High pressure furnace MK 01, High pressure furnace MK 02, High pressure furnace MK 03, High pressure furnace MK 04 - Unlocked by: [Filtration - Stage 2](https://factorio.kalzumeus.com/tech/filtration-mk02.md) ### Filtration media (`filtration-media-2`) - 100 s · tier 6 · productivity modules allowed - Ingredients: 25 × [Gravel](https://factorio.kalzumeus.com/item/gravel.md), 10 × [Activated carbon](https://factorio.kalzumeus.com/item/active-carbon.md), 2 × [Nanofibrils](https://factorio.kalzumeus.com/item/nanofibrils.md), 25 × [Cellulose](https://factorio.kalzumeus.com/item/cellulose.md), 15 × [Microfiber](https://factorio.kalzumeus.com/item/micro-fiber.md) - Results: 200 × [Filtration media](https://factorio.kalzumeus.com/item/filtration-media.md) - Made in: Burner assembling machine MK 01, Burner assembling machine MK 02, Burner assembling machine MK 03, Automated factory MK 01, Automated factory MK 02, Automated factory MK 03, Automated factory MK 04, Character, Character (flying), Mutagenic infusion, (flying) - Unlocked by: [Filtration - Stage 2](https://factorio.kalzumeus.com/tech/filtration-mk02.md) ### Hydrogen chloride (`hydrogen-chloride-quartz`) - 3 s · tier 6 - Ingredients: 100 × [Chlorine](https://factorio.kalzumeus.com/fluid/chlorine.md), 100 × [Hydrogen](https://factorio.kalzumeus.com/fluid/hydrogen.md), 1 × [Quartz tube](https://factorio.kalzumeus.com/item/quartz-tube.md), 1 × [Lamp](https://factorio.kalzumeus.com/item/small-lamp.md) - Results: 100 × [Hydrogen chloride](https://factorio.kalzumeus.com/fluid/hydrogen-chloride.md), 0.9 × [Lamp](https://factorio.kalzumeus.com/item/small-lamp.md) (90% chance), 1 × [Quartz tube](https://factorio.kalzumeus.com/item/quartz-tube.md) - Made in: Chemical plant, Chemical plant MK 01, Chemical plant MK 02, Chemical plant MK 03, Chemical plant MK 04 - Unlocked by: [Filtration - Stage 2](https://factorio.kalzumeus.com/tech/filtration-mk02.md) ### Nexelit cartridge (`nexelit-cartridge`) - 4 s · tier 6 · productivity modules allowed - Ingredients: 25 × [Lithium peroxide](https://factorio.kalzumeus.com/item/lithium-peroxide.md), 10 × [Nexelit plate](https://factorio.kalzumeus.com/item/nexelit-plate.md) - Results: 1 × [Infused nexelit cartridge](https://factorio.kalzumeus.com/item/nexelit-cartridge.md) - Made in: Burner assembling machine MK 01, Burner assembling machine MK 02, Burner assembling machine MK 03, Automated factory MK 01, Automated factory MK 02, Automated factory MK 03, Automated factory MK 04, Character, Character (flying), Mutagenic infusion, (flying) - Unlocked by: [Filtration - Stage 2](https://factorio.kalzumeus.com/tech/filtration-mk02.md) ### Organic solvent (`organic-solvent`) - 2.5 s · tier 6 · productivity modules allowed - Ingredients: 5 × [Activated carbon](https://factorio.kalzumeus.com/item/active-carbon.md), 15 × [Bone meal](https://factorio.kalzumeus.com/item/bonemeal.md), 200 × [Aromatics](https://factorio.kalzumeus.com/fluid/aromatics.md) - Results: 400 × [Organic solvent](https://factorio.kalzumeus.com/fluid/organic-solvent.md) - Made in: Chemical plant, Chemical plant MK 01, Chemical plant MK 02, Chemical plant MK 03, Chemical plant MK 04 - Unlocked by: [Filtration - Stage 2](https://factorio.kalzumeus.com/tech/filtration-mk02.md) ### Nexelit cartridge regeneration (`saturated-nexelit-cartridge-regen`) - 3 s · tier 6 · productivity modules allowed - Ingredients: 1 × [Saturated nexelit cartridge](https://factorio.kalzumeus.com/item/saturated-nexelit-cartridge.md), 25 × [Lithium peroxide](https://factorio.kalzumeus.com/item/lithium-peroxide.md) - Results: 1 × [Infused nexelit cartridge](https://factorio.kalzumeus.com/item/nexelit-cartridge.md) - Made in: Burner assembling machine MK 01, Burner assembling machine MK 02, Burner assembling machine MK 03, Automated factory MK 01, Automated factory MK 02, Automated factory MK 03, Automated factory MK 04, Character, Character (flying), Mutagenic infusion, (flying) - Unlocked by: [Filtration - Stage 2](https://factorio.kalzumeus.com/tech/filtration-mk02.md) ### Saline water (`waste-water-recycle`) - 5 s · tier 6 - Ingredients: 1 × [Filtration media](https://factorio.kalzumeus.com/item/filtration-media.md), 1 × [Biofilm](https://factorio.kalzumeus.com/item/biofilm.md), 200 × [Wastewater](https://factorio.kalzumeus.com/fluid/waste-water.md) - Results: 200 × [Saline water](https://factorio.kalzumeus.com/fluid/water-saline.md) - Made in: Filter MK 01, Filter MK 02, Filter MK 03, Filter MK 04 - Unlocked by: [Filtration - Stage 2](https://factorio.kalzumeus.com/tech/filtration-mk02.md)