Lithium aluminate

Fairchild, G.H. Brown, P.M. The fabrication of lithium aluminate/lithium silicate-based ceramics. Adv. Ceram. 1989, 25, 123-139, (Fabr. Prop. Lithium Ceram.). 

Aluminum Lithium Hydride. Lithium tetrahydro-aluminate lithium aluminum hydride lithium aluminohy-dride lithium alanate. AIH4Li mol wt 37-94. Al 71.11%, H 10.62%, Li 18.29%. LiAlH4. Prepd by treating lithium hydride with an ether soln of aJC12t Finholt, et al. J. Am. Chem. Soc. 69, 1199(1947). Crystal structure Sklar, Post. Inorg. Chem. 6, 669 (1967). 

Synonyms LATB Lithium hydrotris (2-methyl-2-propenolato) aluminate Lithium tri-t-butoxyaluminohydride Lithium tri-t-butoxyhydroaluminate LTBA... 

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... 

An emerging electrochemical appHcation of lithium compounds is in molten carbonate fuel ceUs (qv) for high efficiency, low poUuting electrical power generation. The electrolyte for these fuel ceUs is a potassium carbonate—hthium carbonate eutectic contained within a lithium aluminate matrix. The cathode is a Hthiated metal oxide such as lithium nickel oxide. 

Aluminum chlorite, (Al,Fe)4(Si,Al)402Q(0H)g, in which a gibbsitelike interlayer proxies in part for the bmcitelike interlayer, is being discovered in increasing occurrences and abundance (11,141). Chloritelike stmctures have been synthesi2ed by precipitation of Mg and Al between montmorillonite sheets (143). Cookite [1302-92-7], an aluminous chlorite containing lithium, has been found in high alumina refractory clays and bauxite [1318-16-7] (139). 

Enhanced anti-corrosion properties are also reportedly achieved by mill additions of lithium titanate, lithium aluminate or magnesium titanate to the host glass frit . 

Determination of lithium as lithium aluminate Discussion. Lithium may be determined as lithium aluminate by precipitation with excess of sodium aluminate solution in the cold, the final pH of the solution being adjusted to 12.6-13.0. The precipitate is washed with water until free from alkali and weighed as 2Li20-5Al203 after heating at 500-550°C. The solubility in water is 0.008 gL-1 at room temperature it is 0.09 gL-1 at pH 12.6. 

Liquid junction potential 63, 549 Literature of analytical chemistry 6, 122, 156, 251, 253, 498, 499, 640, 641, 813, 815 Lithium, D. of as aluminate, (g) 459 Litmus 265 Litre xxix, 78 Littrow mounting 661 Logarithms four figure, 843 Lovibond comparator 655 Low voltage d.c. arc 763, 771 Lubricants for glass stopcocks 85 Lyophilic colloids 419 Lyophobic colloids 419 stability of, 419... 

The Li-SOCl2 battery consists of a lithium-metal foil anode, a porous carbon cathode, a porous non-woven glass or polymeric separator between them, and an electrolyte containing thionyl chloride and a soluble salt, usually lithium tetrachloro-aluminate. Thionyl chloride serves as both the cathode active material and the elec-... 

The lithium 2-butenyl(triethyl)aluminate complex, prepared in situ from 2-butenyllithium and triethylaluminum, displayed poor diastereoselectivity in a reaction with benzaldehyde (anti/syn 56 44)7. (Z)-3-Alkoxy-substituted aluminate complexes such as A-C, however, give good diastereoselectivity in aldehyde addition reactions8. The reactions of A with aldehydes at —100 °C give the jyw-diol monoether with >95% diastereoselectivity and >80-95% regiose-... 

In a more general sense, this reduction method provides a convenient pathway for converting an aromatic carboxyl group to a methyl group (see Table I).7 Previously, this transformation has been achieved by reduction of the acid to the alcohol with lithium aluminum hydride, conversion of the alcohol to the tosylate, and a second reduction either with lithium aluminum hydride [Aluminate(l —), tetrahydro, lithium,... 

This mixture is available from Aldrich Chemical Company, Inc. The checkers used a 7 93 mixture of the cis- and traws isomers, prepared by lithium aluminum hydride [Aluminate(l —), tetrahydro-, lithium, (T-4)-] reduction of 4-ferf-butylcyclohexanone and recrystallization of the crude product. The ketone was purchased from Aldrich Chemical Company, Inc. 

Lithium-alkyl-hydrido-aluminate haben als Reduktionsmittel nur geringeBedeutung6 (weiteres s. ds. Handb., Bd. XIII/4, S. 57f.). 

Diese Reduktionsmittel sind Gemische verschiedener Lithium-athoxy-hydrido-aluminate mit einem be-stimmten Hydrid-Gehalt. In der Praxis wird das modifizierte Hydrid meist mit 1 Mol-Aquivalent Essigsaure-athylester hergestellt, da in diesem Fall kein Wasserstoff entwickelt wird und weniger Hydrid verloren geht. 

Dimethoxyethane had been distilled on lithium tetrahydrogenaluminate powder under nitrogen and reduced pressure to obtain anhydrous ether. When distillation stopped, air entered under atmospheric pressure, which caused the apparatus to detonate (violent oxidation of lithium aluminate, which was nearly dried up by oxygen ). 

A suspension of lithium tetrahydrogenaluminate in tetrahydrofuran had been stored for two years. After this period, a new portion of aluminate was introduced into the medium, which heated up and combusted for an unknown reason. This ignition was put down to the hydrogen produced. 

Ethyl acetate has sometimes been used to destroy lithium tetrahydrogen aluminate (the reaction is similar to the one that results from the effect of a carboxyl acid on this metal hydride described on p.321 the acid formed destroys the metal hydride). Such an attempt had been made for this purpose. It led to a very violent detonation. 

High-alumina cement is a rapid-hardening cement made from bauxite and limestone. It is comparatively resistant to chemical attack. Milling retards the setting of aluminous cement [1582]. On the other hand, setting accelerators such as lithium carbonate increase their effect by this treatment. 

Molten Carbonate Fuel Cell The electrolyte in the MCFC is a mixture of lithium/potassium or lithium/sodium carbonates, retained in a ceramic matrix of lithium aluminate. The carbonate salts melt at about 773 K (932°F), allowing the cell to be operated in the 873 to 973 K (1112 to 1292°F) range. Platinum is no longer needed as an electrocatalyst because the reactions are fast at these temperatures. The anode in MCFCs is porous nickel metal with a few percent of chromium or aluminum to improve the mechanical properties. The cathode material is hthium-doped nickel oxide. 

The reaction of 1-alkoxypolyfiuoroalkyl sulfonates with lithium tetraalkyl alumin ates yields stereospecifically alkylated products with a high degree of inversion. However, the reaction with trialkylaluminium reagents is considerably less stereospecific. 

In contrast, the Z isomer was attained as the major isomer (80-93%) by the anti addition of the Zweifel reagent [lithium di(isobutyl)- -butyl aluminate hydride] to the thioacetylene foUowed by trapping of the intermediate with BuTeBr. 

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