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Activation and purification of bentonite for the treatment of crude palm oil (cpo) as vegetable oil

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Crude Palm Oil (CPO) for cooking oil requires bleaching process which is typically done using bleaching earth made from activated bentonite. Currently, substantial amount of activated bentonite used by vegetable oil industries are imported. Meanwhile, bentonite deposits in Indonesia are quite significant. In this research, bentonite obtained locally from the region of Leuwiliang (Bogor, West Java) was purified using sodium hexametaphosphate, and activated using acid reflux methods (H2SO4, 100oC). During the activation, the bentonite was treated with different reflux times (1 hour and 3 hour), and different acid concentrations (1 M, 2.5 M and 5 M). The raw bentonite and treated bentonite were studied using XRD and XRF. Bleaching power was initially studied using adsorption of methylene blue for optimation, followed by bleaching of CPO. The results showed that the purified and activated bentonite with 1 molar H2SO4 at 1 hour duration, had the highest bleaching capacity. This was confirmed by measuring the oil color using spectrophotometer, as well as the Lovibond Tintometer. In addition, the treated oil also showed substantial reduction of peroxide number, and also some reduction of free fatty acid content (FFA).

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Availability

B00835

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Available

Detail Information

Series Title

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Call Number

835

Publisher

: Swiss German University., 2010

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Language

English

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Classification

NONE

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Subject(s)

FT

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