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Synthetic Precipitated Silicon Dioxide EINECS No. 231 545 4 White Carbon Black

Categories Precipitated Silicon Dioxide
Model Number: HF205
Certification: SGS/ASTM/ROHS
Place of Origin: China
MOQ: Negotiable
Price: Negotiable
Payment Terms: L/C, D/A, D/P, T/T
Supply Ability: 1000 Ton Per Month
Delivery Time: 7-10 Work Days
Packaging Details: 10 KGS/Bag
Brand Name: SKYHIL
Material: Silicon Dioxide
Standard: Industrial Use
Other Name: White Carbon Black
Appearance: White and Colloidal Powder
Molecular Formula: Sio2
CAS No: 7631-86-9
EINECS No: 231-545-4
HS Code: 281122
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    Synthetic Precipitated Silicon Dioxide EINECS No. 231 545 4 White Carbon Black

    Synthetic Amorphous Precipitated Silicon Dioxide Used For Tires


    Brief Intruction for precipitated silica

    Precipitated silica, a form of synthetic amorphous silicon dioxide, is derived from quartz sand, a crystalline form of silicon dioxide. The physical properties of precipitated silica can be manipulated during the manufacturing process to deliver products with a wide range of performance-enhancing features engineered for many different end-use applications.


    Here is a brief look at how precipitated silica is made:


    Step 1: Precipitation

    Sodium silicate solution (water glass) and mineral acid are reacted in an agitated vessel to produce a slurry of amorphous silica particles. The critical physical properties of precipitated silica, such as particle size and porosity, are controlled during this stage of the process by manipulating, among other things, the composition, concentration, and ratio of reactants in the precipitating solution; the speed of agitation; the reaction time; and the reaction temperature.

    Step 2: Washing

    The precipitated silica slurry is then concentrated to form a filter cake. The product filter cake is washed to remove the salt byproduct that is produced during precipitation.

    Step 3: Drying

    The silica filter cake is then dried to the desired final product moisture content.

    Step 4: Finishing and packaging

    The dried silica is then finished to achieve the desired final product form. This can include: agglomeration or compaction into a low-dust form, or milling and classification to the required particle size distribution. The final product is packaged for shipment in small bags, big bags, or bulk trucks or railcars.


    Specifications of precipitated silica

    Tires -HF Series


    Product SeriesTire Grade
    TypeHF105HF115HF125HF135HF145
    Physical Formpowdermirco pearlgranular
    BETm2/g110-140140-170125-150155-180190-230
    Silica(dry basis)%≥90≥93
    Drying Loss%4.0~8.0
    Ignition Loss (dry basis)%≤7.0
    pH(10% aqueous solution)6.0~7.5
    DBPcm3/g2.0~3.0
    Sieve Residue 45um%≤0.5
    Cumg/kg≤30
    Mnmg/kg≤50
    Femg/kg≤500
    Soluble Salts (As Na2SO4)%≤1.5

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