Sains Malaysiana 40(9)(2011): 1023–1027

Kesan Kepekatan Asid Performik Terhadap Pengepoksidaan Minyak Sawit Olein

(Effect of Performic Acid Concentration on Epoxidation of Palm Olein)

Darfizzi Derawi & Jumat Salimon*

Pusat Pengajian Sains Kimia dan Teknologi Makanan, Fakulti Sains dan Teknologi

Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor D.E. Malaysia

Diserahkan: 16 Jun 2010 / Diterima: 17 Disember 2010

ABSTRAK

Kajian pengoptimuman tindak balas pengepoksidaan minyak sawit olein (POo) dengan menggunakan mangkin asid performik (HCOOOH) telah dijalankan. Kesan tindak balas terhadap nisbah kepekatan HCOOH : H2O2 dan masa tindak balas telah dikaji pada suhu 45oC. Kandungan oksigen oksirana (OOC) optimum sebanyak 3.61% diperoleh dengan menggunakan nisbah mol 1 : 5 : 2 pada 150 min dan sebanyak 96.5% penukaran dapat dicapai. Hasil tindak balas adalah sebanyak 91.3%. Puncak kromatografi cecair berprestasi tinggi (HPLC) bagi minyak sawit olein terepoksida (EPOo) telah berubah sepenuhnya berbanding puncak HPLC POo. Spektrum transformasi Fourier infra-merah (FTIR) telah menunjukkan kehadiran puncak ikatan gelang oksirana pada 844 cm-1.

Kata kunci: Kandungan oksigen oksirana; minyak sawit olein; pengepoksidaan

ABSTRACT

Optimization study on palm olein (POo) epoxidation by using performic acid (HCOOOH) catalyst was carried out. The effect of concentration ratio of HCOOH : H2O2 and reaction time was studied at 45oC. The optimum content of oxygen oxirane (OOC) obtained was 3.61% and 96.5% of conversion was achieved by using mol ratio of 1 : 5 : 2 at 150 min. The reaction yield was 91.3%. High performance liquid chromatography (HPLC) peaks for epoxidized palm olein (EPOo) showed complete conversion compared to the HPLC peaks of POo. Fourier transform infra-red spectrum showed the presence of oxirane peaks at 844 cm-1.

Keywords: Epoxidation; oxygen oxirane content; palm olein

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*Pengarang untuk surat-menyurat; email: jumat@ukm.my