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CoatCel® Alpha cellulose is the purest form of cellulose, free from lignin and hemicelluloses. It is produced from purified wood pulp having 99.5% purity, producing almost ash less. Alpha cellulose is an inert porous material used to separate solid (impurities and turbidity) from the liquid, making almost free from suspended solids.


  • Eco-friendly being Biodegradable
  • Large porosity/voids due to fibrous structure
  • Inert for alkalis / acids, solvents
  • Stable over high pH and temperature
  • Lower bulk density
  • Higher flow rate

Application of CoatCel ® Alpha Cellulose

  • Brine Filtration
  • Wine Filtration
  • Metal Filtration
  • Oil Filtration
  • Beverage Filtration
  • Welding Electrode
  • Plastic Composite
  • Paint Industry

Brine Filtration

Sigachi designs, manufactures, supplies, erects and commissions brine filtration plant complete with test run responsibility for absolute critical solid separation up to 0.3 micron size less than 0.5 ppm before ion exchange process in Caustic-Chlorine (chlorine alkali) membrane cell based plant. This combines pre-coat tank, body feed tank, filtration units, pumps, valves, atomization (based on PLC or DCS) and many other devices and units. The filtration unit's purpose is to remove suspended solid in the brine and deliver clear brine to the next resin exchange tower. Clarifier, Sand Filter (Anthracite), Brine Filter, Ion Exchange Resin and Cells are in the order of the general process of brine treatment. The brine filter always reduces the size of suspended solid (SS) from 0.3 μm and above to less than 0.5 ppm. This is the key unit for protecting against damage by Ion Exchange Resin and Ion Membrane Cells.

Extensively used in Caustic Soda industry for Filtration levels of PPB (Parts Per Billion).

Typical equipment where Cellulose used as Filter Aid are

  • Filter Press and Chamber Filters
  • Horizontal and Vertical Leaf Filters
  • Candle or Tubular Filters
  • Rotary Vacuum Precoat Filters
  • Belt Press Filters
  • Lenticular or Cassette Depth Filters

Advantages of using Cellulose in Brine Filtration

  • Filter aid is a organic fibrous α-cellulose, used in solid-liquid separations gives an advantage of being biodegradable over other types of Filter aids.
  • Cellulose is characterized by its high aspect ratio, which enables it to pre coat a septum very easily.
  • Cellulose also has the ability to operate in elevated pH environments above 10, making it frequently used in the chlorine-caustic industry to filter the brine feed to electrolysis membrane separators.
  • The addition of body feed increases the permeability in the accumulating filter cake, restricts solids movement, provides channels for filtrate recovery and extends cycle length.

Beverage & Edible Oil Filtration

  • Cellulose offers Neutral PH & low water soluble, as required in food industry.
  • Longer Filter Cycles - The Cellulose as Filtration Aid forms a Filter Coating or cake with far more dirt holding capacity than other filtration media, thus resulting in 2-6 times greater cycle period.
  • Mixes easily & Precoats rapidly - The easy wetting of the Cellulose results in rapid mixing and thus more effective filtration surface area in the same equipment.
  • No Toxic or Hazardous components

Wine Filtration

he Technical and Commercial Advantages of using Cellulose as Filter Aid in Wine Industry are:

Low Weight Reduced Consumption
Low consumption Less Losses and Waste
Soft Fibres Less wear & Tear in Plant and Machinery
No crystalline Component Not Carcinogenic
Derived from Plants Disposal is not an issue

Mining & Metal Filtration

In addition to the basic advantages of Cellulose as Filter Aid, it has an upper hand on account of the following
  • Low to Zero Ash content - After the filtration process, the cellulose products are completely incinerated without any residue. Overall Cost reduction - An 20% reduction in chemicals, 50% electrical costs & minimum 30% reduction in dosage rates compared with other traditional Filter Aid's, the savings are immediate.
  • Packing: The supplies are made normally in 20 kg. Laminated HDPE bag with liner.