Samples taken during deuteration of methyl linoleate with the title catalysts were separated into saturate, monoene and diene fractions. Monoenes were further separated into cis and trans fractions. A comparison of the double bond distribution in monoenes with those from hydrogenation of alkaliconjugated !inoleate indicated that up to 59% of the !inoleate was reduced through a conjugated interm...

II S, stearate; M, mOlloene; D, diene; T, trien€; CD, conjugated {Hene; eDT, conjugated diene-triene. Copper chl'omite 9.12.15 8.9 22.9 33,S 4,6 31.6 17 Nickel 9,12,15 0,9 40,S 21.1 0,5 20 Copper chromite 5,9,12 O,S 27.3 39.4 30,2 0,9 1.4 18 Copper chromite 3.9,12 lOJ 22.3 69,4 6,7 18 D T CD CDT Composition, % Position of double bonds in tl'ienes Analyses of Products Formed During :Hydrogenutio...

The optical properties of coatings pigmented with different black colorants were systematically investigated and their surface temperatures and cooling energy savings were estimated. The black coatings pigmented with chromite iron nickel black and manganese ferrite black spinel colorants are not cool enough to be energy efficient cool black coatings. The cool black coatings pigmented with NIR-t...

The ferrochrome alloy is produced by electric arc melting of the mineral chromite (FeCr2O4). It is largely used for the production of stainless steels. Increasing the amount of chromium content in the steel allows for increased corrosion and oxidation resistance. Other alloying elements, such as nickel (Ni) or molybdenum (Mo), aid in making the steel more passive and increasing its stainless pr...

Microbial extraction of nickel from lateritic chromite overburden (COB), Sukinda by Acidithiobacillus ferrooxidans has been investigated in this work. In anoxic environment, A. ferrooxidans reduced the ferric iron in goethite [Fe(O)OH] mineral of COB by using elemental sulphur as electron donor. Nickel embedded in the complex goethite matrix of COB was successfully recovered by cumulative actio...

nicr2o4 normal spinel nanostructures were prepared via hydrothermal treatment at 180 °c for 12 h in the presence of cetyltrimethylammonium bromide (ctab), sodium dodecyl sulphate (sds) and poly vinylpyrrolidone-25000 (pvp-25000) as capping agents and subsequent calcination process at 500 °c for 3 h . in this method, [ni(en)2(h2o)2](no3)2 and [cr(en)3]cl3.3h2o used as precursors and not utilized...

Introduction: Pallasites are widely considered to be poor in sulphide, as such little is known about troilite evolution and processing. Very few examples exist indicating the multiple stages of troilite evolution. Discussed here are two such samples of FeS structures one is a nickel enriched FeS grain in the main group pallasite Hambleton. The other is a series of micron FeS particles within ol...

The ores of chromite, nickel, copper, and zinc show a wide distribution over geologic time, but those of iron, titanium, lead, uranium, gold, silver, molybdenum, tungsten, and tin are more restricted. Many of the limitations to specific time intervals are probably imposed by the evolving tectonic history of Earth interacting with the effects of the biomass on the evolution of the earth's s surf...

The reaction of copper stearate with triethylaluminurn (TEAL) formed a soluble catalyst that promoted the selective hydrogenation of the linolenyl groups in soybean oil. This homogeneous catalyst was more active than copper-chromite. The activity was enhanced by the addition of silica, alumina or titania. Ethyl alcohol accelerated the hydrogenation when it was added in small amounts and retarde...