Sains Malaysiana 45(5)(2016): 817–823

 

Sintesis Sebatian Hidroksi-Eter Minyak Sawit Olein

(Synthesis of Palm Olein Based Hydroxy-Ether Compound)

 

 

DARFIZZI DERAWI* & JUMAT SALIMON

 

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

Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor Darul Ehsan, Malaysia

 

Received: 22 January 2014/Accepted: 25 November 2015

 

ABSTRAK

Sebatian hidroksi-eter-POo (80% hasil) disintesis melalui pembukaan gelang oksirana minyak sawit olein terepoksida (EPOo) secara alkoholisis. Hasil optimum pembukaan gelang oksirana (99.2%) dicapai dengan menggunakan asid sulfurik 3% v/bt pada suhu tindak balas yang tinggi (80oC) selama 30 minit masa tindak balas. Spektrum resonan magnetik nukleus-proton (1H-NMR) hidroksi-eter-POo telah menunjukkan kehadiran puncak proton pada karbon eter (3.2, 3.5 ppm) dan proton pada kumpulan hidroksil (4.8 ppm). Spektrum resonan magnetik nukleus-karbon (13C-NMR) hidroksi-eter-POo telah menunjukkan kehadiran puncak karbon yang terikat dengan kumpulan hidroksil (75 ppm) dan karbon pada karbonil kumpulan eter (72 ppm). Kelikatan kinematik hidroksi-eter-POo adalah 234.4 cSt (40oC) dan 28.1 cSt (100oC) dengan indeks kelikatan 156.

 

Kata kunci: Alkoholisis; minyak sawit olein terepoksida; pembukaan gelang oksirana

 

ABSTRACT

Hydroxy-ether-POo (80% of yield) was synthesised through oxirane cleavage of epoxidized palm olein (EPOo) using alcoholysis process. An optimum oxirane cleavage has been obtained with 99.2% yield using sulphuric acid 3% v/wt at 80oC for 30 min. The proton-nuclear magnetic resonance (1H-NMR) spectrum of hydroxy-ether-POo showed the presence of proton peak attached to the carbon of ether (3.2, 3.5 ppm) and proton of hydroxy (4.8 ppm). The carbon-nuclear magnetic resonance (13C-NMR) spectrum of hydroxy-ether-POo showed the presence of carbon peak bonded to hydroxyl (75 ppm) and carbonyl carbon on ether (72 ppm). While, kinematic viscosity of hydroxy-ether-POo was 234.4 cSt (40oC) and 28.1 cSt (100oC) with the viscosity index of 156.

 

Keywords: Alcoholysis; epoxidized palm olein; oxirane cleavage

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*Corresponding author; email: darfizzi@ukm.edu.my

 

 

 

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