Biodiesel Fuel from Animal Fat. Ancillary Studies on Transesterification of Beef Tallow
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- 作者：Fangrui Ma ; L. Davis Clements ; and Milford A. Hanna
- 刊名：Industrial & Engineering Chemistry Research
- 出版年：1998
- 出版时间：September 1998
- 年：1998
- 卷：37
- 期：9
- 页码：3768 - 3771
- 全文大小：121K
- 年卷期：v.37,no.9(September 1998)
- ISSN：1520-5045
文摘
Transesterification of beef tallow was investigated. The solubility of ethanol in beef tallow wasmuch higher than that of methanol. At 100 
C the solubility of methanol was 19% (w/w). Thesolubility of ethanol in beef tallow reached 100% (w/w) at about 68 C. For the distribution ofmethanol between beef tallow methyl esters (BTME) and glycerol, the percentage of totalmethanol in the glycerol phase was higher than that in the fatty acid methyl ester (FAME)phase in a simulated system at room temperature. At 65-80 C, however, the percentage oftotal methanol in FAME (60% (w/w)) was higher than that in glycerol (40% (w/w)) in a 90:10(w/w) blend of FAME and glycerol. This coincided with the methanol distribution in thetransesterified product. The process for making beef tallow methyl esters should recovermethanol using vacuum distillation, separate the ester and glycerol phases, and then wash thebeef tallow methyl esters with warm water. At neutral pH, the separation of ester and glyceroland water washing was easier because it reduced emulsion formation.
C the solubility of methanol was 19% (w/w). Thesolubility of ethanol in beef tallow reached 100% (w/w) at about 68 C. For the distribution ofmethanol between beef tallow methyl esters (BTME) and glycerol, the percentage of totalmethanol in the glycerol phase was higher than that in the fatty acid methyl ester (FAME)phase in a simulated system at room temperature. At 65-80 C, however, the percentage oftotal methanol in FAME (60% (w/w)) was higher than that in glycerol (40% (w/w)) in a 90:10(w/w) blend of FAME and glycerol. This coincided with the methanol distribution in thetransesterified product. The process for making beef tallow methyl esters should recovermethanol using vacuum distillation, separate the ester and glycerol phases, and then wash thebeef tallow methyl esters with warm water. At neutral pH, the separation of ester and glyceroland water washing was easier because it reduced emulsion formation.