Partial hydrogenation of sunflower oil on platinum catalysts: Influence of process conditions on the mass content of geometric isomers

The large-scale application of volatile and highly water-soluble pesticides to guarantee crop production can often have negative impacts on the environment. The main loss pathways are vapor drift, direct volatilization, or leaching of the active substances. Consequently, the pesticide can either accumulate and/or undergo physicochemical transformations in the soil. In this scenario, we synthesized alginate nanoparticles using an inverse miniemulsion template in sunflower oil and successfully used them to encapsulate a hydrophilic herbicide, i.e., dicamba. The formulation and process conditions were adjusted to obtain a unimodal size distribution of nanohydrogels of about 20 nm. The loading of the nanoparticles with dicamba did not affect the nanohydrogel size nor the particle stability. The release of dicamba from the nanohydrogels was also tested: the alginate nanoparticles promoted the sustained and prolonged release of dicamba over ten days, demonstrating the potential of our preparation method to be employed for field application. The encapsulation of hydrophilic compounds inside our alginate nanoparticles could enable a more efficient use of pesticides, minimizing losses and thus environmental spreading. The use of biocompatible materials (alginate, sunflower oil) also guarantees the absence of toxic additives in the formulation.

Download Full-text

Partial Hydrogenation of Sunflower Oil-derived FAMEs Catalyzed by the Efficient and Recyclable Palladium Nanoparticles in Polyethylene Glycol

Journal of Oleo Science ◽

10.5650/jos.ess16206 ◽

2017 ◽

Vol 66 (10) ◽

pp. 1161-1168 ◽

Cited By ~ 3

Author(s):

Wei Liu ◽

Guanghui Lu

Keyword(s):

Polyethylene Glycol ◽

Sunflower Oil ◽

Palladium Nanoparticles ◽

Partial Hydrogenation

Download Full-text

The effect of process conditions on positional and geometric isomerization during partial hydrogenation of trilinolein with copper catalyst

Journal of the American Oil Chemists Society ◽

10.1007/bf02639228 ◽

1970 ◽

Vol 47 (12) ◽

pp. 467-469 ◽

Cited By ~ 4

Author(s):

E. Kirschner ◽

E. R. Lowrey

Keyword(s):

Copper Catalyst ◽

Process Conditions ◽

Partial Hydrogenation ◽

Geometric Isomerization

Download Full-text

Partial hydrogenation of sunflower oil: Use of edible modifiers of the cis/trans-selectivity

Journal of Molecular Catalysis A Chemical ◽

10.1016/j.molcata.2008.10.030 ◽

2009 ◽

Vol 299 (1-2) ◽

pp. 88-92 ◽

Cited By ~ 13

Author(s):

Gabriela M. Tonetto ◽

Jhon F. Sánchez M. ◽

María L. Ferreira ◽

Daniel D. Damiani

Keyword(s):

Sunflower Oil ◽

Partial Hydrogenation

Download Full-text

Examining the Possibility of Improving the Properties of Sunflower Oil in Order to Obtain a Better Medium for the Process of Frying Food

Proceedings ◽

10.3390/foods_2020-07748 ◽

2020 ◽

Vol 70 (1) ◽

pp. 104

Author(s):

Ranko Romanić ◽

Tanja Lužaić ◽

Ksenija Grgić

Keyword(s):

Chemical Composition ◽

Oxidative Stability ◽

Sunflower Oil ◽

Nutritive Value ◽

Edible Oils ◽

Atmospheric Oxygen ◽

Process Conditions ◽

Chemical Changes ◽

Frying Process ◽

Physical And Chemical

With the modern and accelerated way of life, frying has become an extremely common way of food preparation. In the frying process, hot oil or fat serves as a heat transfer medium. Ideal fat in all frying processes does not exist due to differences in the chemical composition of the product, process conditions, expected nutritive value, and shelf life of the final product. During frying, physical and chemical changes simultaneously occur changing the chemical composition of edible oils. The food is immersed in hot fat, in the presence of air, where the frying medium is directly affected by three agents: moisture from the food, atmospheric oxygen, and high temperature. Reactions that occur are hydrolysis, auto-oxidation, thermal oxidation, and thermal decomposition, and the products that occur affect various physical and chemical changes in fats, as well as in fried food. The quality and oxidative stability of vegetable oils or their resistance to changes caused by oxidative processes is the time during which oils can be protected from the (auto) oxidation process. Analytical methods used in practice to determine the oxidative stability of oils are accelerated oil oxidation test (Rancimat test and OSI index) and Schaal oven test. In this paper, the possibilities of improving refined sunflower oil in order to obtain oil with greater applications in the food frying process are examined. Standard refined sunflower oil, sunflower oil with altered fatty acid composition, as well as sunflower oil enriched with natural and synthetic antioxidants were tested. The obtained results were compared with palmolein, commonly used for food frying. Of the tested sunflower oils, high-oleic sunflower oil with an iodine value (IV) of 85 g/100 g, OSI index of 9.3, and total oxidation (TOTOX) index of 4.73, increased 6.66 times after exposure to frying proving to be the most similar to palmolein (IV = 57 g/100 g; OSI = 17.8; TOTOX = 7.60).

Download Full-text

Optimization of Sunflower Oil Transesterification Process Using Sodium Methoxide

The Scientific World JOURNAL ◽

10.1100/2012/475027 ◽

2012 ◽

Vol 2012 ◽

pp. 1-8 ◽

Cited By ~ 19

Author(s):

Sara KoohiKamali ◽

Chin Ping Tan ◽

Tau Chuan Ling

Keyword(s):

Methyl Ester ◽

Sunflower Oil ◽

Sodium Methoxide ◽

Methyl Esters ◽

Acid Methyl Ester ◽

Process Conditions ◽

Suitable Alternative ◽

Ester Content ◽

Significant Difference ◽

Methyl Ester Content

In this study, the methanolysis process of sunflower oil was investigated to get high methyl esters (biodiesel) content using sodium methoxide. To reach to the best process conditions, central composite design (CCD) through response surface methodology (RSM) was employed. The optimal conditions predicted were the reaction time of 60 min, an excess stoichiometric amount of alcohol to oil ratio of 25%w/w and the catalyst content of 0.5%w/w, which lead to the highest methyl ester content (100%w/w). The methyl ester content of the mixture from gas chromatography analysis (GC) was compared to that of optimum point. Results, confirmed that there was no significant difference between the fatty acid methyl ester content of sunflower oil produced under the optimized condition and the experimental value (P≥0.05). Furthermore, some fuel specifications of the resultant biodiesel were tested according to American standards for testing of materials (ASTM) methods. The outcome showed that the methyl ester mixture produced from the optimized condition met nearly most of the important biodiesel specifications recommended in ASTM D 6751 requirements. Thus, the sunflower oil methyl esters resulted from this study could be a suitable alternative for petrol diesels.

Download Full-text