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Arkema provides polymeric filter aids designed to coalesce small gypsum crystals into much larger particles, creating larger void spaces in the filter cake. The larger void spaces allow for faster liquid drainage time on phosphoric acid filters.

Arkema filtration aids can be formulated to improve any phosphoric acid plant production rate by adjusting molecular weight and/or charge to meet the operating conditions of each operation, as well as the unique characteristics of the particular phosphoric acid/gypsum slurry being delivered from the reactors to the filters. Therefore, filter aid selection and performance are plant specific. Our filtration aids have demonstrated the ability to improve filtration rates and capacity. Our filtration aids come in different product forms: powders (anionic, cationic, non-ionic), emulsions (anionic, cationic, non-ionic), liquid coagulants (cationic and anionic), GRAS and FOOD grade, and other non-PAM chemistries.

Arkema’s technical experts will work closely with you to develop and supply the right filter aids and delivery systems for optimal phosphoric acid production from phosphate rock in your plant.


  • Improved plant production rates                                                                                    
  • Improved overall P2O5 recovery                                                                                    
  • Cleaner phosphoric acid with improved color / lower total organic carbon (TOC)                                                                                                                             
  • Higher fertilizer grades produced                                                                                    
  • Reduced defoamer usage in reactor

About our latest developments

CustoFloc® TW4056

Next Generation Filtration Aid for Phosphogypsum Filters
• Improved plant production rates of 5-30%

• Cleaner phosphoric acid with improved color / lower total organic carbon (TOC)

• Improved P2O5 recovery efficiency of 1-5%

CustoFloc® TW5050

Improves filtration rate in phosphoric acid production
• Improved plant production rates of 5-30%

• Higher fertilizer grades produced

• Reduced defoamer usage in reactor

CustoFloc® 811E

Emulsion Clarification Aid for 25-54% Phosphoric Acid
• Improved settling rate: typically 2-4X faster

• More solids removed: flocculation efficiency typically 96-99%

• Homogeneous sludge for easier handling and less stress on rake

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