Closeclose Reset Make one or more selections to narrow your search Help help
  • Pass your mouse over the options below, and click on the name to make your selection and filter, narrowing down your selections. Click again to remove the filter or press "RESET".
  • Where there is a ( ) sign while you hover your mouse, that refers to a category which contains selectable items. Click to expand and click again to collapse the list.
  • Click on the "more >" sign ( ) to view more information about the specific element.
Our Βusinesses
  • more
    Imerys Absorbents
  • more
    Steel Casting Fluxes
  • more
    Civil Engineering Additives
  • more
    Metalcasting Additives
  • more
    NYCO
  • more
    Bentonite & Perlite Intermediates
Our Applications
  • more
    Ceiling Tiles & Boards
    • more
      Boards
    • more
      Ceiling Tiles
  • more
    Civil Engineering
    • more
      Diaphragm/Slurry Wall
    • more
      Horizontal Directional Drilling
    • more
      Landfill and Sealing Liners
    • more
      Pipe Jacking
    • more
      Shield Tunnelling
  • more
    Construction materials
    • more
      Cement
    • more
      Concrete
    • more
      Plasters & Mortars
  • more
    Food – Feed
    • more
      Horticulture
    • more
      Phosphates
  • more
    Foundry
    • more
      Core Sand Binders and Additives
    • more
      Customer Support
    • more
      Foundry Auxiliaries
    • more
      Green Sand Additives
    • more
      Technical Support
  • more
    Glass & Ceramics
    • more
      Ceramics
  • more
    Adhesives and Sealants
  • more
    Cryogenics
  • more
    Elastomers
  • more
    Friction
  • more
    Ironmaking
  • more
    Mold Fluxes Raw Materials
  • more
    Oil & Gas Drilling
  • more
    Oilfield, agricultural & other industrial applications
  • more
    Paint and Coatings
  • more
    Pet Litter
  • more
    Plastics
  • more
    Steelmaking
Our Natural Resources
  • more
    Bentonite
  • more
    Moler
  • more
    Perlite
  • more
    Pozzolan
  • more
    Wollastonite
  • more
    Zeolite
Our Industrial Solutions
  • more
    ASPECT® – Chemically Modified/Untreated, Fine Particle Size, High Aspect Ratio Wollastonite
  • more
    Bentonite Clumping Pet Litter
  • more
    Blends
  • more
    Casting Fluxes
  • more
    Cement Stable Bentonite
  • more
    Civil Engineering Flocculants
  • more
    Clumping, Non-clumping and Organic Pet Litter
  • more
    Construction Pozzolan
  • more
    Construction Wollastonite
  • more
    Core Sand Additives
  • more
    Covering Materials
  • more
    Drilling Bentonite
  • more
    ENVIBOND® System
  • more
    Green Molding Sand Expertise
  • more
    HARRP – Coarse Grades of Untreated Wollastonite
  • more
    HDD Bentonite
  • more
    Horticultural Raw Perlite
  • more
    Horticultural Zeolite
  • more
    Inorganic Core Sand Binders
  • more
    Iron Ore Pelletizing Bentonite
  • more
    Laboratory Analysis
  • more
    Lustrous Carbon Formers
  • more
    Metallurgical Active Slags
  • more
    Micrasil®
  • more
    Mold Flux Feeders
  • more
    Moulding Sand Binders
  • more
    NYAD® – Untreated Wollastonite
  • more
    NYGLOS® – Chemically Modified/Untreated Wollastonite
  • more
    NYLITE™ – Wollastonite Blend and Additive
  • more
    Oilfield, agricultural & other industrial products
  • more
    Other Foundry Products
  • more
    Phosphate Production Additive
  • more
    PHYLLOCOAT™ – Chemically Modified Aluminosilicate (Experimental)
  • more
    PHYLLOMAT™ – A Lamellar-Shaped Aluminosilicate
  • more
    Pipe Jacking Bentonite
  • more
    Raw Graded Perlite
  • more
    RIKO®
  • more
    Sealing Bentonite
  • more
    Service Lab Analysis Database
  • more
    Slag Binders
  • more
    Slurry Wall Bentonite
  • more
    Technical Support and Innovation
  • more
    Tunneling Bentonite
  • more
    ULTRAFIBE® – Chemically Modified/Untreated Wollastonite for Friction Materials
  • more
    ULTRAFINE NYAD – Ultrafine Wollastonite, untreated
  • more
    WOLLASTOCOAT® – Chemically Modified Wollastonite
  • more
    Wollastonite 95 – special grades for ceramics applications
  • more
    Zeolite Pet Litter

Phosphates

Additive-in-phosphoric-acid-production

Imerys Phosphate Production Additive is vital in the production of phosphoric acid when the phosphate rocks being used have a weight ratio of “active SiO2”/F lower than 0.53 or if, in general, its “active SiO2” content is considered low. “Active SiO2” is essential in order for the released HF to be captured during Phosphate Production.

Moreover, when ”low active SiO2 content of phosphate rock” is the case, the resulting by-produced gypsum dihydrate is characterized by needle-type crystallization, which inhibits the subsequent acid/gypsum filtration process, dramatically reducing the phosphoric plant’s capacity and economic viability. Phosphate Production Additive addition changes completely the morphology of the gypsum dihydrate crystals, thus improving significantly the filtration rate.

To solve these two problems (HF and Gypsum needles), Imerys active perlite is co-fed with phosphate rock at a calculated rate to correct the active SiO2/F ratio to at least 0.53 (and adjust the Al2O3/P2O5 rate, which is also important, to approx 0.020), The gypsum crystal habitus then changes from to a cluster-like shape whose specific surface area is significantly smaller. Filtration rates soar as a result, to sometimes double or even triple “pre-perlite” values but at the same P2O5 recovery yield (around 95%). In addition to the increased efficiency in filtration, the addition of perlite also results in a reduction in overall plant corrosion caused by HF, and a reduction of HF emissions to the atmosphere.