Hydrogenation of fats and oils at supercritical conditions

Härröd, Magnus; Møller, Poul

doi:10.1016/s0921-8610(96)80009-4

Cited by 23 publications

(15 citation statements)

References 7 publications

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“…The supercritical system therefore seems, at first sight, most appropriate for full hydrogenation of triacylglycerols [59] or the production of fatty alcohols [60,61]. On the other hand, a more recent publication dealing with rapeseed oil reports that "when all the polyunsaturated fatty acids are hydrogenated to monounsaturated fatty acids, no trans fatty acids and no saturated fatty acids are formed" [62].…”

Section: Using a Solvent To Increase Hydrogen Solubilitymentioning

confidence: 99%

Revisiting the formation of trans isomers during partial hydrogenation of triacylglycerol oils

Dijkstra¹

2006

Euro J Lipid Sci & Tech

135

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The decisions to limit (Europe) or declare (USA) the trans isomer content of certain fatty foodstuffs have caused a demand for hardstocks with a reduced trans isomer content. One way to produce such hardstocks is by interesterifying high-melting components such as palm stearin or fully hydrogenated vegetable oils with lauric or liquid oils. Another way is to modify the hydrogenation process. Possible modifications are reviewed. A moderate reduction in trans isomer content results from operating the hydrogenation process at much reduced temperature, but this also leads to an increase in saturates. Larger reductions in trans isomers may well be made possible by the recent development of new catalysts. One development involves the use of zeolites that allow the rather straight trans isomer to enter the pores while keeping the more curved cis isomers outside. The other development involves a precious metal catalyst that may have been modified in such a way that it has a reduced affinity for monounsaturated fatty acid moieties.

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Section: Using a Solvent To Increase Hydrogen Solubilitymentioning

confidence: 99%

Revisiting the formation of trans isomers during partial hydrogenation of triacylglycerol oils

Dijkstra¹

2006

Euro J Lipid Sci & Tech

135

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“…Most of the commercial SCF hydrogenations have been filed by Härröd and coworkers15 and Degussa scientists in the EU16, 17 and elsewhere. In the United States, the work of King and coworkers,12 at the Department of Agriculture, is very important in this regard because it opens the possibility of a new process in lipid chemistry.…”

Section: Introductionmentioning

confidence: 99%

Intraparticle diffusion mechanisms in SC sunflower oil hydrogenation on Pd

2005

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“…In the conventional slurry process, the performance of the batch multiphase reactors at low hydrogen pressure (Ͻ0.5 MPa) and high temperatures (383-443 K), with a nickel-based catalyst, presents problems of H 2 availability attributed to the low solubility of hydrogen in organic liquids, as well as interface mass transport limitations (Härröd et al, 1997). These two factors decrease the effective H 2 concentration in the liquid and on the catalyst particle, thus limiting the global reaction rate and promoting the unwanted isomerization of cis double bonds to the trans configuration.…”

Section: Introductionmentioning

confidence: 99%