Isomerization of methyl linoleate on ruthenium(III) alkoxide complex: mathematical modeling

Doble, Mukesh; Narasimhan, C. S.; Ramnarayan, K.; Deshpande, V. M.

doi:10.1021/ie00092a022

Cited by 4 publications

(2 citation statements)

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“…For example, platinum Hsu et al, 1989;Bailar and Itatani, 1967), nickel (Bailar and Itatani, 1967) , rhodium (Basu and Kasar, 1986;Singer and Stein, 1972;, ruthenium (Ucciani, 1981Mukesh et al, (2), 1988Mukesh et al, , 1989Cecchi et al, , 1984Ucciani et al, 1983;Krompiec et al, 1997Krompiec et al, , 1998Sleeter, 1996), bimetallic nickel-ruthenium , chromium (Tucker and Riley, 1985;Frankel, 1970) and iron complexes (Frankel and Metlin, 1967) are known to catalyze such reactions. However, dimerization, polymerization and hydrogenation are troublesome side reactions, and in some instances separation of the catalyst at the end of the reaction is not feasible.…”

Section: Introductionmentioning

confidence: 99%

Utilization of selected biorenewable resources: solubilization of lignocellulosics and conjugation of soybean oil

Oshel

2007

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Section: Introductionmentioning

confidence: 99%

Utilization of selected biorenewable resources: solubilization of lignocellulosics and conjugation of soybean oil

Oshel

2007

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“…A number of heterogeneous and homogeneous catalyst systems of transition metal complexes have also been reported for the conjugation of ML and certain vegetable oils. For example, platinum Hsu et al, 1989;Bailar and Itatani, 1967), nickel (Bailar and Itatani, 1967) , rhodium (Basu and Kasar, 1986;Singer and Stein, 1972;, ruthenium (Ucciani, 1981Mukesh et al, (2), 1988Mukesh et al, , 1989Cecchi et al, , 1984Ucciani et al, 1983;Krompiec et al, 1997Krompiec et al, , 1998Sleeter, 1996), bimetallic nickel-ruthenium , chromium (Tucker and Riley, 1985;Frankel, 1970) and iron complexes (Frankel and Metlin, 1967) are known to catalyze such reactions. However, dimerization, polymerization and hydrogenation are troublesome side reactions, and in some instances separation of the catalyst at the end of the reaction is not feasible.…”

Section: Introductionmentioning

confidence: 99%

Utilization of selected biorenewable resources: solubilization of lignocellulosics and conjugation of soybean oil

Oshel

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In recent years, concern has risen over the use of fossil fuels due to their contribution to global warming, and to our dependence on imports of petroleum from nations that could pose a threat to national security. As a result, it has become increasingly important to develop technologies to replace fossil fuel based products with biorenewable alternatives. In this thesis nearly quantitative solubilization of lignocellulosic materials using phosphite esters has been realized, and is presented as a potential pretreatment for production of fermentable sugars for use in manufacturing commodity chemicals, specifically ethanol. Water solubilization of lignocellulosics using phosphite esters will enhance digestibility by disrupting the lignocellulose structure, changing cellulose morphology, and cleaving some glycosidic bonds. In a second project, soybean oil, which contains un-conjugated polyunsaturated fatty acid esters, is isomerized into oil containing conjugated polyunsaturates. The process is carried out under photochemical conditions using iodine as a catalyst in a hexanes solution to achieve 99% conjugation. The resulting conjugated soybean oil is demonstrated to have enhanced drying properties for use in alkyd resins.

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Catalytic Production of Conjugated Fatty Acids and Oils

et al. 2011

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The reactive double bonds in conjugated vegetable oils are of high interest in industry. Traditionally, conjugated vegetable oils are added to paints, varnishes, and inks to improve their drying properties, while recently there is an increased interest in their use in the production of bioplastics. Besides the industrial applications, also food manufactures are interested in conjugated vegetable oils due to their various positive health effects. While the isomer type is less important for their industrial purposes, the beneficial health effects are mainly associated with the c9,t11, t10,c12 and t9,t11 CLA isomers. The production of CLA-enriched oils as additives in functional foods thus requires a high CLA isomer selectivity. Currently, CLAs are produced by conjugation of oils high in linoleic acid, for example soybean and safflower oil, using homogeneous bases. Although high CLA productivities and very high isomer selectivities are obtained, this process faces many ecological drawbacks. Moreover, CLA-enriched oils can not be produced directly with the homogeneous bases. Literature reports describe many catalytic processes to conjugate linoleic acid, linoleic acid methyl ester, and vegetable oils rich in linoleic acid: biocatalysts, for example enzymes and cells; metal catalysts, for example homogeneous metal complexes and heterogeneous catalysts; and photocatalysts. This Review discusses state-of-the-art catalytic processes in comparison with some new catalytic production routes. For each category of catalytic process, the CLA productivities and the CLA isomer selectivity are compared. Heterogeneous catalysis seems the most attractive approach for CLA production due to its easy recovery process, provided that the competing hydrogenation reaction is limited and the CLA production rate competes with the current homogeneous base catalysis. The most important criteria to obtain high CLA productivity and isomer selectivity are (1) absence of a hydrogen donor, (2) absence of catalyst acidity, (3) high metal dispersion, and (4) highly accessible pore architecture.

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Isomerization of methyl linoleate on ruthenium(III) alkoxide complex: mathematical modeling

Cited by 4 publications

References 3 publications

Utilization of selected biorenewable resources: solubilization of lignocellulosics and conjugation of soybean oil

Utilization of selected biorenewable resources: solubilization of lignocellulosics and conjugation of soybean oil

Utilization of selected biorenewable resources: solubilization of lignocellulosics and conjugation of soybean oil

Catalytic Production of Conjugated Fatty Acids and Oils

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