Results 61 to 70 of about 1,079 (210)
Investigation of the surface properties of gangue minerals in PGM bearing ores
, 2005 Bibliography: leaves 90-95.The recovery of Platinum Group Minerals (PGM) and associated sulphides by froth flotation from the Bushveld Igneous Complex is complicated by the presence of naturally floatable gangue minerals such as talc.
Martinovic, Jasmina
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Copper chromite 촉매를 사용한 일산화탄소의 산화반응
, 1978 학위논문(석사) - 한국과학기술원 : 화학공학과, 1978.2, [ iii, 72 p. ]As a basic study for controlling automobile exhaust gas, the copper chromite catalysts which have higher intrinsic activity and higher resistance to thermal sintering were prepared, and the properties ...
문희, Moon, Hee
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, 2007 The penetration and corrosion resistance to copper and anode slag of six magnesia-chromite and six chrome-free refractory brick types were tested using static finger tests at a typical copper-refining temperature ( 1300 degrees C). The microstructures of
Jones, Peter Tom +4 more
core +1 more source
Evaluation of Ophiolite Complex Impact and Pollution Indices of Groundwater Resources in Jovein Area (NE Iran) [PDF]
Journal of Advances in Environmental Health ResearchBackground: Potential ore deposits and mining activities can cause soil and groundwater pollution with heavy metals, posing risks to human health. This study aimed to identify heavy metal sources, their transfer patterns, and contamination levels in the ...
Raheleh Hatefi +2 more
doaj +1 more source
Reduction of Hexavalent Chromium by Stenotrophomonas and Bacillus
MicrobiologyOpen, Volume 15, Issue 2, April 2026.Stenotrophomonas and Bacillus remove toxic hexavalent chromium via enzymatic reduction and non‐enzymatic mechanisms. Reductases (e.g., ChrR, HhuH, YhdA, NfrA, Bcr005, NitR, AzoR) use NAD(P)H to convert Cr(VI) to the less toxic Cr(III). ABSTRACT Hexavalent chromium [Cr(VI)] is a widespread environmental pollutant, posing a significant health risk to ...
Ahmad Fadhlullah Husaini +4 more
wiley +1 more source
Reductive alkylation of ethanolamine and methylamine by carbonyl compounds over copper chromite: Deactivation of the catalyst [PDF]
, 1993 165-167Ethanolamine and methylamine have been reductively alkylated by carbonyl compounds over copper chromite in the presence of hydrogen. The catalyst is rapidly deactivated during these reactions.
Bhattacharyya, K K +2 more
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Production of fatty alcohol from palm oil methyl ester [PDF]
Songklanakarin Journal of Science and Technology (SJST), 2007 Fatty alcohol is an important raw material for the production of surfactants, and is currently in demand by markets and has a high potential for growth. Moreover, fatty alcohol can be made from methylester that is produced from fats and natural oil.
Tongurai, C. +2 more
doaj
, 2023 An ultrasonic irradiation-assisted green approach was developed for the facile preparation of xanthenones and chromenopyrimidinediones using copper chromite nanoparticles (CuCr2O4 NPs) as an efficient heterogeneous catalyst.
Saman Dahi-Azar (14590518) +2 more
core +1 more source
Green Synthesis and CatalysisLignocellulose biomass, without any doubts, is one of the most promising, and, therefore, one of the most studied sources for the production of biofuels, valuable chemicals and “green” solvents. Furfural – a product of biomass catalytic conversion – is a
Victoria S. Zhuravleva +4 more
doaj +1 more source
Extraction of platinum metals during procssing of chromium ores from dunnite deposits
Записки Горного института, 2018 Currently, the main raw materials sources of platinum group metals in Russia are complex sulfide copper-nickel ores of the Taimyr region and placer deposits.
G. V. Petrov +2 more
doaj +1 more source