Bleaching Earth

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The different processes to produce biodiesel and HVO have their own requirements for feedstock quality, requiring different pre-treatment processes and bleaching earths

Bleaching Earth

 

Adsorbents

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Activated carbon is used to remove a wide range of impurities during edible oil processing, and producers must take into account properties such as particle size, activation level and base materials when designing an activated carbon to meet refining requirement

Adsorbent

Spent Bleaching Earth

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Spent bleaching earth oil is a sustainable feed stock for renewable diesel and sustainable aviation fuel but lack of logistics and volumes remain as obstacles to its development

Spent-Bleaching-Earth

From past to future

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Bleaching earth have evolved from removing primary and secondary oxidation products and undesirable pigments to playing a key role in the remediation of dioxins, pesticides, PAHs and3-MCPDs Patrick Howes.

News 2.1 BE From Past to Future

Moving towards natural clays

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Natural bleaching earths pre-blended with steam activated carbons have been shown to be a beneficial alternative to acid-activated bleaching earths in removing undesirable components during edible oil refining

bleaching earths 2019

Towards healthier palm oil

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3- and 2-MCPDs and GEs pose a potential cancer risk and it is therefore important for edible oil producers to limit the content of these compounds in their products to the highest possible degree. Dr Pat Howes suggests how palm oil producers, in particular, can minimise the presence of chloride and partial glycerides, which lead to the formation of MCPDs and GEs

NaturalBleach June 2018

Making use of the used

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Bleaching earths are the most important processing aid utilized in the refining of edible oils. The handling, disposal, and use of the spent bleaching earth has historically been considered problematic.

The main issues are the potential for spontaneous combustion of the spent bleaching earth (SBE), and the leaking of entrained oily materials from the SBE into ground water at landfill sites. 

According to the Malaysian Palm Oil Council (MPOC), global edible oil production in 2014 was 199.75M tonnes. For an average bleaching earth consumption of 0.5% of the weight of the oil, this would equate to at least one million tonnes per annum of spent bleaching earth.

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Dr Patrick Howes is the technical director at
Natural Bleach Sdn Bhd, Malaysia