Biodiesel Feedstock from Emulsions Produced by Aqueous Processing of Yellow Mustard. (1st April 2014)

• Record Type: Journal Article
• Authors: Tabtabaei, Solmaz; Boocock, David G. B.; Diosady, Levente L.
• Is Part Of: Journal of the American Oil Chemists' Society. Volume 91:Number 7(2014)
• Page Start: 1269
• Page End: 1282
• Publication Date: 2014-04-01
• Subjects: Aqueous extraction -- 1, 4‐Dioxane -- Multiple‐stage treatment -- Single‐phase miscella -- Single‐stage treatment -- Ternary phase diagram -- Tetrahydrofuran (THF) -- Yellow mustard emulsion; Oils and fats -- Periodicals; Soap -- Periodicals; Fats -- Periodicals; Food-Processing Industry -- Periodicals; Acides gras -- Périodiques; Aliments -- Industrie et commerce -- Périodiques; Huiles et graisses -- Périodiques; Savon -- Périodiques; Oliën; Chemie; Oils and fats; Soap; Periodicals; 547.77
• DOI: 10.1007/s11746-014-2448-8
• Languages: English
• ISSNs: 0003-021X

Abstract

Abstract: The multi‐stage treatment of stable oil‐in‐water emulsions produced during non‐enzymatic aqueous processing of dehulled yellow mustard flour with cyclic ethers [tetrahydrofuran (THF) and 1, 4‐dioxane] was investigated to produce a single‐phase oil‐solvent‐water miscella suitable for biodiesel production. While the single‐stage treatment of yellow mustard emulsion recovered 97 % and 95 % of the oil by using 4:1 THF:oil and 9:1 dioxane:oil weight ratios, respectively, miscella phases containing more than 7 % water formed, which made them unsuitable as biodiesel feedstock. Multi‐stage treatments of the emulsion using lower THF:oil and dioxane:oil weight ratios were further developed to produce oil‐solvent‐water miscella phases with low water content. While three‐stage extraction of emulsions using 0.5:1, 1:1, 1.5:1, and 2:1 dioxane:oil weight ratios did not destabilize the emulsion, three‐stage extraction using 0.5:1 and 0.75:1 THF:oil weight ratios effectively recovered over 97 % of the oil, resulting in the production of oil‐rich miscella phases containing only 1 % and 1.5 % water, respectively. These miscella phases were analyzed for free fatty acid and phosphorus contents and proved to be excellent feedstocks for the preparation of high‐purity methyl esters through single‐phase base‐catalyzed transmethylation.