Recent Patents on Chemical Engineering

Yousheng Tao  
State Key Laboratory of Structural Chemistry
Fujian Institute of Research on the Structure of Matter
Chinese Academy of Sciences


Comparision of Biodiesel Production from Three Non-Edible Oils by Acid, Alkali and Enzyme Methods

Author(s): Haldar K. Sandip, Ghosh B. Bankim and Nag Ahindra

Affiliation: Department of Chemistry, Indian Institute of Technology, Kharagpur, India.


The production of fatty acid esters (biodiesel) from three non-edible oils i.e Putranjiva roxburghii (putranjiva, a new source), Pongamia glabra (karanja) and Jatropha carcus (jatropha) by acid, base and enzyme (catalyst) methods were compared. Sulphuric acid (1.0% w/w) as acid catalyst gave maximum conversion of jatropha oil (83.51%) than karanja (76.22%) and putranjiva oil (66.03%) at 3 hr. Sodium methoxide (1.5% w/w of total reactant) as base catalyst gave the conversion of 57.45%, 96.30% and 97.03% for oils of jatropha, karanja and putranjiva respectively at 3 min. In enzymatic transesterification jatropha, karanja and putranjiva gave the conversion of 52.0%, 27.4% and 17.3% respectively at 40 0C and 8 hr. The percentage conversion was measured by NMR analysis. It was observed in transesterification reaction that degummed vegetable oils gave better yield of biodiesel than crude vegetable oils. A secondary alcohol also gave higher conversion to biodiesel than methanol due to its higher miscibility in oil. In this article, a review of the patents on different aspects of the comparision of biodiesel production from three non-edible oils by acid, alkali and enzyme methods is presented.

Keywords: Alternative diesel fuel, Biodiesel, Catalyst, Putranjiva oil, Non-edible oil, Transesterification

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Article Details

Page: [167 - 172]
Pages: 6
DOI: 10.2174/2211334710902020167