Results 11 to 20 of about 321,639 (298)

Carbonation of Sodium Aluminate/Sodium Carbonate Solutions for Precipitation of Alumina Hydrates—Avoiding Dawsonite Formation

open access: yesCrystals, 2021
Experimental work has been performed to investigate the precipitation mechanism of aluminum hydroxide phases from sodium aluminate/sodium carbonate pregnant solutions by carbon dioxide gas purging.
Danai Marinos   +4 more
doaj   +2 more sources

Carboxylation of phenol and its derivatives with sodium ethyl carbonate

open access: yesGreen Processing and Synthesis, 2017
A comparison activity of phenol and its derivatives in carboxylation reaction with sodium ethyl carbonate was carried out (the ratio between substrate and sodium ethyl carbonate was 2:1, T=185°С, Pco2=10 atm, τ=7 h).
Suerbaev Khakim A.   +2 more
doaj   +2 more sources

Fourier-transform infrared spectroscopy analysis of mechanochemical transformation kinetics of sodium carbonate to bicarbonate [PDF]

open access: yesScience of Sintering, 2022
During mechanical activation, qualitative changes that can produce various phenomena occur in the material. In this study, anhydrous sodium carbonate was mechanically activated for 2, 7, 14, and 28 minutes in a vibro mill at a frequency of 3000 ...
Đorđević Nataša   +5 more
doaj   +1 more source

Technological studies of the use of modifiers in the flotation of calcium-containing minerals [PDF]

open access: yesE3S Web of Conferences, 2020
Using samples of skarn scheelite-sulfide ore from the Vostok-2 deposit, studies were carried out to model combinations of increased dose of inorganic modifiers (sodium carbonate, water glass, sodium sulfide) based on publications by foreign researchers ...
Shepeta Elena   +2 more
doaj   +1 more source

Carbothermic Reduction of Ilmenite Concentrate with Sodium Carbonate Additive to Produce Iron Granules and High Titania Containing Slag

open access: yesMetals, 2022
The influences of heating pattern and sodium carbonate addition on the carbothermic reduction of ilmenite concentrate have been experimentally studied. The experiments were carried out using isothermal–gradient temperature technique between 1000 °C and ...
Zulfiadi Zulhan   +4 more
doaj   +1 more source

Optimization of uranium alkaline leaching from the solid waste sample containing high fluoride and nitrate by response surface methodology experimental design [PDF]

open access: yesمجله علوم و فنون هسته‌ای, 2023
Carbonate solution is used for the alkaline leaching of uranium from solid waste. Time, temperature, stirring speed (independent parameters) and total carbonate concentration, carbonate to bicarbonate ratio, and the ratio of liquid eluent volume to solid
M. Haji Hosseini   +7 more
doaj   +1 more source

Experimental investigations of extinguishing sodium pool fires using modified expandable graphite powders

open access: yesCase Studies in Thermal Engineering, 2022
A new type of composite fire-extinguishing powder was prepared with expandable graphite (EG) and sodium carbonate as the main materials. The morphology, structure, and thermal stability of the extinguishing powder were characterized. A fire-extinguishing
Mei-Lin Zhang   +7 more
doaj   +1 more source

EFFECT OF SOME SODIUM SALTS ON THE GROWTH, MINERAL COMPOSITION AND ORGANIC CONTENT Of SOME GRAPE ROOTSTOCKS \II. THE ORGANIC CONTENT [PDF]

open access: yesJournal of Plant Production, 2003
The present investigation was carried out during 2000 and 2001 growing seasons In order to study the effect of sodium chloride and sodium carbonate treatments on organic content of four grapevine cultivars (commonly used as rootstocks) namely, Harmony,
M. Abd EI-Rahman   +3 more
doaj   +1 more source

Methods for synthesizing diethyl carbonate from ethanol and supercritical carbon dioxide by one-pot or two-step reactions in the presence of potassium carbonate [PDF]

open access: yes, 2009
Carbon dioxide sequestration was studied by synthesizing diethyl carbonate (DEC) from ethanol and CO2 under supercritical conditions in the presence of potassium carbonate as a base. The co-reagent was ethyl iodide or a concentrated strong acid.
Thiebaud-Roux, Sophie   +3 more
core   +1 more source

Influence of various additives on the early age compressive strength of sodium carbonate activated slag composites: An overview

open access: yesJournal of the Mechanical Behavior of Materials, 2020
The use of sodium carbonate as an alkali activator for slag to produce alkali-activated slag is promising due to its sustainable, economic and user-friendly properties.
Adesina Adeyemi
doaj   +1 more source

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