Bentonite
Bentonite is one the two naturally occurring mineral with highly plastic clay containing average 85 % clay mineral, montmorillonite group with decolorizing and absorbing properties. Bentonite has inherent bleaching properties like fuller’s earth which is giving it a great commercial importance. There are two types of Bentonite: 1.Swelling type or Sodium Bentonite which is referred to as Bentonite 2.Non Swelling type or Calcium Bentonite which is referred to as Fuller’s Earth.
The commercial importance of bentonite depends on its physicochemical properties rather than its chemical composition. Excellent plasticity, lubricity, high dry-bonding strength, high shear and compressive strength, low permeability and low compressibility make bentonite commercially viable

Product Features

  • Uses
  • 1.Bentonite has high swelling properties along with good viscosity and liquid limit which is highly valued in most of the industrial applications.
    2.Sodium bentonite is perfect mineral as a binder in the iron pellets preparation and in foundry and as well oil well drilling mud.
    3.It also acts as a suspending agent in oil well drilling fluids. Bentonite has good green strength along with high hot and dry strength which helps moulds during pouring or cooling process in foundries from breaking or cracking.
    4.Bentonite is used in iron ore pelletisation. 75 micron size sodium based bentonite is suitable in Iron ore pelletisation industries for bonding.
    5.To make end plugs and rocket engine nozzles in pyrotechnic bentonite clay is used.
    6.Remarkable colloidal and waterproofing properties of bentonite create its importance in infrastructure and civil engineering projects.
    7.Bentonite gels are used as a carrier for a number of cosmetic preparations, toothpastes, creams, etc.
    8.Chemical, Rubber, Insecticide & Pesticide industries also uses Bentonite.
    9.Bentonite fines powder is free from dirt and other foreign matter and of least swelling property is used in ceramic industry.
    10.Bentonite which is the active mineral in clays with medicinal properties is also prescribed as a bulk laxative and it is also used as a base for many dermatological formulations.
  • Specification
  • The specifications of bentonite for chemical & rubber and oil-well drilling industries vide BIS Specification IS: 6186-1986 (Second Revision Reaffirmed 2010) is given in Table-3. Specifications for ceramic industry vide IS: 12621-1988 (Reaffirmed 2011) are given in Table-4. BIS has revised the specifications of bentonite for use in foundries; the new specifications are prescribed vide IS: 12446 - 2007 (first Revision, Reaffirmed 2012).