In pilot-plant tests, the linolenate content of soybean oil was reduced to less than 1% without increasing the saturates, by hydrogenation to an IV of about 115 with an active copper-chromite catalyst. The linolenate-linoleate selectivity ratio (KLe/KLo ) was from 9 to 12. Several commercial copper-chromite catalysts were used in hydrogenation tests. The activities of four of five commercial ca...

Direct alloying of chromium by chromite attracts a lot interest for its superiority in energy-saving and process simplification. The knowledge reduction FeCr2O4, the main component chromite, is key to understanding mechanism from chromite. effect melt composition (carbon addition) temperature on FeCr2O4 carbon-containing iron was studied. higher carbon content melt, recovery obtained. Similarly...

The East Sulawesi Ophiolite, one of the three largest ophiolites in world, contains important podiform chromitites. However, origin these chromite deposits is not well constrained. Here, we present detailed mineralogy and situ chemistry solid inclusions within for chromitites from Kabaena Island, Southeast Sulawesi. Chromite grains have low TiO2 (0.17–0.27 wt%) Al2O3 (13.4–15.1 contents high Cr...

To explain the unusually high selectivity of copper catalysts toward linolenate, model compounds were hydrogenated (150 C and atmospheric pressure) and the reaction products analyzed. Products varied depending upon location of the double bonds. Monoenes were not reduced by copper chromite except when the double bond was next to a carboxyl group. Dienes with isolated double bonds also were not r...

baft ophiolite mélange is a part of naein-baft ophiolite (southeast of kerman province in iran). serpentinites from baft ophiolite mélange contain different types of spinels such as chromite, chromespinel, ferritchromite and magnetite which can reveal different stages of evolution in host serpentinites. the compositions of baft chromites show that they belong to podiform chromitites that may ha...