Aluminates magnesium

Sillimanite, see Aluminum silicon oxide (1/1) Smithsonite, see Zinc carbonate Soda ash, see Sodium carbonate Spelter, see Zinc metal Sphalerite, see Zinc sulflde Spherocobaltite, see Cobalt(II) carbonate Spinel, see Magnesium aluminate(2—)... [Pg.275]

In the vapor phase, acetone vapor is passed over a catalyst bed of magnesium aluminate (206), 2iac oxide—bismuth oxide (207), calcium oxide (208), lithium or 2iac-doped mixed magnesia—alumina (209), calcium on alumina (210), or basic mixed-metal oxide catalysts (211—214). Temperatures ranging... [Pg.494]

A sohd solution of a pure magnesium aluminate spiael (MgAl20 with MgO is an effective metal oxide adsorbent (43). Such a soHd solution (Mg2A10 ) does not destroy the spiael framework the MgO adsorbs SO and the adsorption activity of the dispersed MgO ia the spiael is much greater than that of pure MgO itself (43). [Pg.215]

Chemical Name Tetrakis(hydroxymagnesium)decahydroxydialuminate dihydrate Common Name Magnesium aluminate hydrate monalium hydrate Structural Formula [Mg(DH)]4 [(HD)4AI(DH)(HO)AI(OH)4]-2H2D Chemical Abstracts Registry No. 1317-26-6... [Pg.893]

Several different possible zeolite structures may result, and if the sodium content is too high, calcium and magnesium are excluded and a hard zeolite scale of sodium-aluminum silicate preferentially forms. If only calcium is present, calcium-aluminum silicate zeolite forms, also as a hard scale. If only magnesium is present in solution, it forms the flocculant magnesium aluminate, MgAl204. [Pg.411]

It is for this reason that we write the solid state diffusion reaction for the magnesium aluminate spinel as follows ... [Pg.161]

In these soak (300°C)-ramp (up to 900°C) /min) mode tests, a O.lOg of sulfated DESOX sample—the leading catalyst based on magnesium aluminate spinel with an excess MgO catalyzed with Ce and V oxides [9]—was allowed to react with either Hj (5%)/Ar (50 ml/min), undiluted H (70 ml/min) or CH (14 ml/min). [Pg.138]

Moreau, C. Bekakra, L. Olive, J. L., and Geneste, P., Hydrodenitrogenation of Quinoline and Phenanthridine in the Presence of 2, 6-Diethylaniline and Hydrogen-Sulfide Over Molybdenum and Nickel-Molybdenum Sulfides Supported on Zirconia, Titania, Nickel-Aluminates and Magnesium-Aluminates. Bulletin Des Societes Chimiques Beiges, 1991. 100(11-12) pp. 841-847. [Pg.59]

The separator is often the weakest component in any electrochemical cell. There are also difficulties in employing ion-exchange diaphragms in aprotic media. Particularly with large industrial cells, it is advantageous to devise reaction conditions that allow the use of an undivided cell. One solution to these problems for an electrochemical reduction process employs a sacrificial anode of magnesium, alumin-... [Pg.7]

It is hydrated complex of hydroxy magnesium aluminate. It initially reacts with acid and releases Al(OH)j which then reacts more slowly. It is a good antacid, with prompt and sustained neutralizing action. [Pg.262]

Catalysts. - Group VIII metals, conventional base metal catalysts (Ni, Co, and Fe) as well as noble metal catalysts (Pt, Ru, Rh, Pd) are active for the SR reaction. These are usually dispersed on various oxide supports. y-Alumina is widely used but a-alumina, magnesium aluminate, calcium aluminate, ceria, magnesia, pervoskites, and zirconia are also used as support materials. The following sections discuss the base metal and noble metal catalysts in detail, focusing on liquid hydrocarbon SR for fuel cell applications. [Pg.220]

Tanaka et al. reported that gasoline POX over Rh, Pt, and Pt-Rh is promoted by alkali (Li) and alkaline earth metals (Ba, Ca, K) supported on magnesium aluminate spinel. The catalysts were tested isothermally at 800°C at an air to fuel ratio of 5.1 and GHSV 50,000 h Li, Mg and MgLi promoters were added to Pt supported on MgAl204 spinel. All catalysts produced similar H2 and CO reformate concentrations of 23 and 25 vol%, respectively. There was a discernable difference in the carbon deposition. The unpromoted Pt catalyst showed carbon levels of 0.02 wt% carbon, where the alkali and alkaline earth promoted Pt catalysts had carbon levels of 0.01 wt%. [Pg.227]

Cerium magnesium aluminate is a highly efficient green phosphor (lmax. = 541 nm), which is used in trichromatic fluorescent lamps. The high quantum yield of 65 % is effected by the energy transfer from the sensitizer, Ce3 +, to the activator, Tb3 +. ... [Pg.244]

Peigney, A., Rul, S., Lefevre-Schlick, F. and Laurent, Ch., Densification during hot-pressing of carbon nanotube-metal-magnesium aluminate spinel composites , to be submitted, 2006. [Pg.333]

Ting, C.-J. and Lu, H.-Y., Hot-pressing of magnesium aluminate spinel-I. Kinetics and densification mechanism , Acta. Mater., 1999, 47, 817-830. [Pg.333]

It is reported1 that fracture toughness and hardness values of sintered magnesium aluminate spinel are in the ranges of 1.9-2.7 MPa m1/2 and 9.3-... [Pg.375]

Dal Maschio, R., Fabbri, B. and Fiori, C., Industrial applications of refractories containing magnesium aluminate spinel , Industrial Ceramics, 1988 8(3) 121-6. [Pg.394]

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