Optimization of the hydroxylation reaction of epoxidised rice-bran oil using a response surface methodology

Purwanto, Edy and Ngothai, Yung and O'Neill, Brian and Bremmell, Kristen (2011) Optimization of the hydroxylation reaction of epoxidised rice-bran oil using a response surface methodology. In: CHEMECA 2011, 18-21 September 2011, Hilton Sydney, New South Wales, Australia.

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Abstract

The use of modified plant oils as a renewable feedstock in the chemical industry has become more desirable as we move towards a carbon-free society. In particular, epoxidized fatty acid derivatives derived from vegetable sources may be utilized as stabilizers and plasticisers in polymer, as lubricant additives and as constituents of polyurethane foams. Rice bran oil (RBO) is a by-product of the rice milling process (conversion of brown to white rice) and a potentially abundant and inexpensive raw material for such products. The synthesis of a polyol product from rice bran oil (RBO) involves two key reaction steps, namely: epoxidation followed by hydroxylation. This study considers the optimization of the reaction conditions for the second step where epoxidised rice bran oil is converted into a polyol. A response surface methodology was utilized for this optimization task. The hydroxylation reaction was performed in a batch reactor using a mixture of alcohols (methanol and isopropanol) with sulfuric acid as a catalyst. A central composite design, with two variables and two response functions was applied to determine influence of the input variables on reaction yield and product viscosity. The conversion of reaction of epoxidised RBO to product polyol exhibits a quadratic dependence on reaction time and temperature. Optimal condition (maximum polyol yield) was achieved with a reaction time of 126 min at a temperature of 49oC.

Item Type: Conference or Workshop Item (Paper)
Subjects: T Technology > TP Chemical technology
Divisions: Faculty of Engineering > Department of Chemical Engineering
Depositing User: Edy Purwanto 61145
Date Deposited: 09 Apr 2015 06:35
Last Modified: 09 Apr 2015 06:35
URI: http://repository.ubaya.ac.id/id/eprint/23905

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