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

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In cooking oil industry, Crude Palm Oil (CPO) requires bleaching process which isrntypically done using bleaching earth. The common bleaching earth used is activatedrnbentonite. Currently, cooking oil industries in Indonesia import the activated bentoniternin substantial amount for the bleaching process. Meanwhile, bentonite deposits inrnIndonesia are quite significant. In this research, bentonite obtained locally from thernregion of Leuwiliang (Bogor, West Java) was purified using ultrasonic with sodiumrnhexametaphosphate (NaPO3)6 and water, and activated using acid reflux methodsrn(H2SO4, 100oC, 1 hour). During the activation, the bentonite was treated withrndifferent acid concentrations (1 M, 0.1 M and 0.01 M). The raw bentonite and treatedrnbentonite were studied using XRD and XRF. The purification that was done usingrnultrasonic treatment removed the impurities from bentonite, particularly the quartz,rnand, hence, purified the montmorillonite. Bleaching power was initially studied usingrnadsorption of methylene blue for optimation, followed by bleaching of CPO. Thernresults showed that both the purified and nonpurified bentonite, activated with 0.1rnmolar H2SO4 at 1 hour duration had the highest bleaching capacity. This wasrnconfirmed by measuring the oil colour using spectrophotometer. In addition, therntreated oil also showed substantial reduction of free fatty acid content (FFA), and alsornsome reduction of peroxide number.

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B01028

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Series Title

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Call Number

1028

Publisher

: Swiss German University., 2011

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Language

English

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NONE

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Subject(s)

FT

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