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Activated alumina
Activated alumina is manufactured from aluminium hydroxide by dehydroxylating it in a way that produces a highly porous material; this material can have a surface area significantly over 200 m2/g. The compound is used as a desiccant (to keep things dry by adsorbing water from the air) and as a filter of fluoride, arsenic and selenium in drinking water. It is made of aluminium oxide (alumina; Al2O3). It has a very high surface-area-to-weight ratio, due to the many "tunnel like" pores that it has. Activated alumina in its phase composition can be represented only by metastable forms (gamma-Al2O3 etc.). Corundum (alpha-Al2O3), the only stable form of aluminum oxide, does not have such a chemically active surface and is not used as a sorbent.
Activatedalumina is manufactured from aluminium hydroxide by dehydroxylating it in a way that produces a highly porous material; this material can have...
even destroy products sensitive to moisture. List of desiccants: Activatedalumina Aerogel Benzophenone (as anion) Bentonite clay Calcium chloride Calcium...
(1990). "Estimate of the Activation Energies for Boundary Diffusion from Rate-Controlled Sintering of Pure Alumina, and Alumina Doped with Zirconia or Titania"...
distillation from sodium and benzophenone, or by passing through a column of activatedalumina. The compound may have been synthesised by either Jābir ibn Hayyān...
binder for FCC catalysts and adsorbents. It is also a raw material for activatedalumina. Calvet, E.; Bovinet, P.; Noel, M.; Thibon, H.; Maillard, A.; Tertian...
for a water defluoridation technique; and in 1952, a functioning activatedalumina community defluoridation plant was commissioned in Bartlett, Texas...
sector. A B C D E F G H I J K L M N O P Q R S T U V W X Y Z AA - Activatedalumina ADB - Asian Development Bank ABR - Anaerobic baffled reactor - improved...
wastewater treatment plant operations. The medium used is typically an activatedalumina compound impregnated with materials to handle specific gases such...
ethanol with sulfuric acid or in the gas phase with aluminium oxide or activatedalumina. Ethylene is produced from methionine in nature. The immediate precursor...
teeth. Methods of reducing fluoride levels is through treatment with activatedalumina and bone char filter media. Other popular methods for purifying water...
through a pressure vessel with two "towers" filled with a media such as activatedalumina, silica gel, molecular sieve or other desiccant material. This desiccant...
can be accomplished by percolating water through granular beds of activatedalumina, bone meal, bone char, or tricalcium phosphate; by coagulation with...
filters Water, using water separators, silica gel, activatedalumina or a molecular sieve Oil, using activated carbon or a molecular sieve Carbon monoxide,...
catalytic reactions. Typical supports include various kinds of activated carbon, alumina, and silica. Two main methods are used to prepare supported catalysts...
at a caustic waste reservoir chain took place at the Ajkai Timföldgyár alumina plant in Ajka, Veszprém County, in western Hungary. On 4 October 2010,...
filter, the Alcan Enhanced ActivatedAlumina filter, the Bangladesh University of Engineering and Technology (BUET) ActivatedAlumina filter and the Stevens...
is an industrial waste generated during the processing of bauxite into alumina using the Bayer process. It is composed of various oxide compounds, including...
chiller is filled with a solid material (for example zeolite, silica gel, alumina, active carbon or certain types of metal salts), which in its neutral state...
include substances such as silica, alumina, and fire clay brick refractories. Notable reagents that can attack both alumina and silica are hydrofluoric acid...
S2CID 53197261. hal-01938089. Russell, Allen S.; Cochran, C. Norman (1950). "Alumina Surface Area Measurements". Industrial & Engineering Chemistry. 42 (7):...
supports ranging from conventional and most commonly alumina to novel various kinds of activated carbon. Synthesis methods and functions vary greatly...
in various industrial processes. The volcanic ash, rich in silica and alumina, acts as the building blocks for the porous structures of molecular sieves...
networks. Many geopolymers may also be classified as alkali-activated cements or acid-activated binders. They are mainly produced by a chemical reaction...
materials with a high surface area, most commonly alumina, zeolites or various kinds of activated carbon. Specialized supports include silicon dioxide...
or ultrafiltration with a biological wastewater treatment process, the activated sludge process. These technologies are now widely used for municipal and...
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