DESICCANT TYPES

Bentonite Clay, Silica Gel, Molecular Sieve, and Carbon

Edition Date :
April 26, 2022

Desiccants are available in silica gel, bentonite clay, and molecular sieve. Also available are carbon fills with desiccant for moisture, odor, and gas adsorption.

Benefits

Desi Pak® (Bentonite Clay): Moisture Adsorbent

  • Naturally-occurring mineral
  • minimally processed
  • Economical desiccant
  • Remains dry and free-flowing
  • Adsorption capacity is considerable even at low humidity levels & increases as relative humidity rises
  • Can be reactivated

Sorb-It® (Silica Gel): Moisture Adsorbent

  • Remains dry and free flowing
  • Adsorption capacity is relatively small at low humidity levels but increases as humidity rises
  • Can be reactivated

Tri-Sorb® (Molecular Sieve): Moisture and Odor/Gas Adsorbent

  • Most aggressive desiccant options
  • Adsorption capacity is relatively high at low humidity levels and remains almost constant as relative humidity increases
  • Available in a variety of packaging configurations

Carbon - Odor and Gas Adsorbing Packs

  • Control odors and gases within packaged products
  • Highly porous structure and surface area
  • Available in a variety of pack sizes 

Bentonite Clay or Silica Gel with Carbon - Moisture and Odor/Gas Adsorbent

  • Combinations help control: moisture, gas, and odors simultaneously

Documents

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Bentonite Clay Desiccant (Desi Pak®)

Desi Pak® (Bentonite Clay): Moisture Adsorbent

Clariant's Desi Pak bentonite clay desiccants are an effective and economical desiccant option. A calcium-rich montmorillonite, Desi Pak’s layered structure attracts and binds water molecules to its vast inner and outer surface area.  Even at full water vapor capacity, Desi Pak remains dry and free-flowing with no apparent change in size, shape or texture.  The adsorption capacity of Desi Pak is considerable even at low humidity levels and increases as relative humidity rises.  Desi Pak’s adsorption rate is high enough to prove effective for most applications at low humidity. At high humidity levels, Desi Pak adsorbs moisture much more slowly than silica gel or molecular sieve, making handling less problematic.  Desi Pak’s adsorption capacity as a function of temperature remains constant at constant relative humidity between 20°C and 50°C (however the rate may vary). For more information about bentonite desiccants, download our White Paper: Bentonite desiccants - The natural, sustainable desiccant solution for moisture controlled packaging

Silica Gel Desiccant (Sorb-It®)

Sorb-It® (Silica Gel): Moisture Adsorbent

Clariant's Sorb-It silica gel desiccants are a synthetic material made of highly porous amorphous silicon oxide. Sorb-It binds water molecules in random intersection channels of various diameters and remains dry and free flowing, even after fully saturated with water vapor.  Sorb-It’s adsorption capacity is relatively small at low humidity levels but increases as humidity rises.  At high humidity levels, Sorb-It adsorbs moisture much faster than desiccant clay.  Sorb-It’s adsorption capacity as a function of temperature decreases slightly at constant relative humidity between 20°C and 50°C (however the rate may vary)

Molecular Sieve Desiccant (Tri-Sorb®)

Tri-Sorb® (Molecular Sieve): Moisture and Odor/Gas Adsorbent

Tri-Sorb molecular sieve desiccants are the most aggressive of Clariant’s desiccant options.  Based on the synthetic zeolite (molecular sieve) types 3A, 4A and 13X, these zeolites exhibit crystalline structures with well-defined and uniform pores of 3Å, 4Å and 10Å diameters respectively.  Tri-Sorb adsorbs water vapor and gas molecules that fit into the pores. The adsorption capacity of Tri-Sorb is relatively high at low humidity levels and remains almost constant as relative humidity increases.  The adsorption rate is also high at high humidity levels, where Tri-Sorb accepts moisture much faster than Desi Pak, making handling more difficult.  The adsorption capacity of Tri-Sorb as a function of temperature remains constant at constant relative humidity and absolute humidity between 20°C and 50°C (however the rate may vary).

Carbon

Carbon - Odor and Gas Adsorbing Packs

Clariant's odor and gas adsorbing packs are designed to control objectionable odors and gases within packaged products.  Made of activated carbon, they have a highly porous structure and surface area that attracts and bonds with gases and volatile organic molecules.  An odor and gas adsorbent pack is capable of adsorbing 50 percent of its weight of carbon tetrachloride (tetrachloromethane) at 25°C.

Bentonite or Silica Gel with Carbon

Bentonite or Silica Gel with Carbon - Moisture and Odor/Gas Adsorbing Packs

Activated carbon combined with either Bentonite or silica gel to control moisture, gas, and odors simultaneously. 

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For more information about our desiccants, humidity indicator, or oxygen absorber solutions, please call us or email desiccants@clariant.com

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