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Bleaching Clay (Fuller's Earth)

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It is a highly adsorptive variant of clay, which mainly consists of hydrated aluminium silicates. It finds uses as a bleaching agent and as an adsorbent in decolorizing and refining of oils and fats. This mineral has a unique property of absorbing basic colours and removing them from oils. It contains alumina, silica, iron oxides, lime, magnesia and water in variable proportions and is categorized as sedimentary clay. Mainly found in whitish, buff, brown, green, olive and blue colours, it may be semi plastic or non plastic in nature and may or may not dissolve in water. Back in the history its original use was in the fulling of wool to remove oil and grease but with the passage of time its applications have also diversified and it now mainly finds use in bleaching and clarifying petroleum and secondarily in refining edible oils. This mineral is mined in many parts of the world including United States, Georgia and Florida, Germany and India being the leading producers and also in England near Reigate, Nutfield, and Bath. It has to be crushed and dried befor putting to any use. Talking in general terms, bleaching earth is mainly used as a decolourising agent, which could change the tint of any coloured oil to a lighter shade by changing the basic colour units in oil, without altering the chemical properties of the oil. These are special clays activated by physical or chemical processes. Natural clays found in special strata are subjected to various processes such as desegregation in water, treatment by sulphuric acid solutions, filtration, baking, grinding, before converting them to high quality bleaching clay. The efficacy of bleaching earth is dependent on selection of the right grade and proper blends of the basic raw material, bentonite. Our organization is the leading supplier of various grades of Fuller's earth produced in India. Owing to our over three decades of expertise in catering to the vast petroleum and edible oil refineries, we are able to manufacture highly effective customized products as per the consumer needs, based on our technical know-how and continuous research and development. Some of the other applications of this fuller earth are:

  • There are even accounts of Fuller's Earth being used to decolorize beer
  • Granular Fuller's Earth is used to improve UV spectrometer readings and PNC values of petroleum base oil distillates
  • Since over a century and till date the major use of Fuller's Earth is for decolorizing animal, vegetable and petroleum oils, fats, greases, waxes and solvents
  • Cat litter
  • Cosmetic creams and face packs
  • Pharmaceuticals
  • Agricultural pesticide carriers
  • Manufacturing of various catalysts used in the petroleum and chemical industries

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