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Chloride aluminium electrolysis

Preparation. Strontium metal can be obtained by electrolysis of the fused chlorides or by reduction of the oxide by aluminium. [Pg.348]

The general methods for the production of the alkali metals are (1) Electrolytic processes involving the electrolysis of (a) the fused hydroxide, or (b) a fused salt— chloride, nitrate, cyanide, etc. (2) Chemical processes involving the reduction of hydroxide, or carbonate, or other salt with carbon, metal carbide, iron, calcium, magnesium, aluminium, etc. W. Spring 5 claims to have reduced a little potassium chloride by passing hydrogen over the salt at a red heat. [Pg.447]

The only reasonably successful advance in this sense is the Alcoa process, based on the electrolysis of aluminium trichloride in a 2-15 per cent concentration at 700°C in a 3 2 mixture of molten sodium chloride and potassium chloride using carbon electrodes. Aluminium oxide is previously converted into aluminium chloride using chlorine from electrolysis. The reactions are thus... [Pg.338]

Phosgene has been formed at the graphite anode during the electrolysis of commercial calcium aluminates (for the production of aluminium-calcium alloys) when the aluminate content of the molten bath became low relative to the chloride-containing melt [233]. [Pg.259]

Electrolysis of conducting solutions of aluminium(III) chloride [738] liberates a mixture of carbon monoxide and dichlorine [736]. [Pg.532]

Metallurgy. — Metallic, rubidium may be prepared in a variety of ways (1) electrolysis of the fused chloride, (2) heating RbOH with aluminium or mugnesinin, fH) heating Rb,t 0 with carhon or magnesium, (4) heating It Iff 1 wilh calcium, (5) heating the tartrate to white heat. [Pg.51]

Metallurgy. — The metals of most of the cerium group elements have been prepared, three general methods having been used t (1) fusion of the anhydrous halides with sodium, potassium, calcium, or aluminium (2) electrolysis of the fused chlorides or of a solution of the oxide in the molten fluoride (3) heating the oxides with magnesium, calcium, or silicon. Reduction with aluminium has also been tried, but it is not satisfactory except possibly for cerium itself. Electrolysis has been the most successful, the other methods usually giving at best an alloy. [Pg.109]

Electrolysis is employed widely in the manufacture of both metals and chemicals. For instance, the method is used to extract the metals sodium, magnesium and aluminium from their fused salts. In the chemicals industry, one of the largest processes is the electrolysis of an aqueous solution of sodium chloride (brine) for the manufacture of chlorine and caustic soda, i.e.. [Pg.107]

Davy electrolysed fused hydroxides of potassium and sodium in 1807, and in this way he discovered the metals potassium and sodium. A number of important metals are still produced by a similar route, the electrolysis of fused salts, including sodium (Na), magnesium (Mg), calcium (Ca) and aluminium (Al). Sodium, magnesium and calcium are all produced via electrolysis of the molten chloride. Taking molten sodium chloride (NaCl), as an example, the reactions are as follows. [Pg.277]

Bunsen s electrolytic researches included the electrodeposition of chromium from chromous chloride solution, in which the great influence of the current density was observed with amalgamated platinum wire cathodes even metallic barium and calcium were deposited from hot concentrated solutions of the chlorides. He described (after Deville) the electrolytic production of aluminium from fused NaAlCl4. Bunsen and Matthiessen described the preparation of lithium by electrolysis of the fused chloride. [Pg.287]

However, Wohler, like his predecessors, did not obtain pure aluminium. The decisive word was said by the French chemist A. Saint Claire Deville. In 1854 he prepared the samples of pure metal, using sodium instead of potassium for the reduction stage. Simultaneously with Bunsen he performed electrolysis of melted double chloride of aluminium and sodium this was the first instance of producing aluminium electrochemically. A. Saint Claire Deville also pioneered the development of an industrial process of aluminium production. [Pg.109]

Certain processes are carried out through the electrolytic route, e g. production of caustic soda by electrolysis of sodium chloride solution, production of aluminium by electrolysis of aluminium fluoride. [Pg.73]

The composition of the solvent has a dramatic influence on the electrodeposition process of refractory metals in fused electrolytes [1]. Also, in contrast to other metals prepared by electrolysis at high temperatures such as alkali metals, magnesium or aluminium, all the refractory metals exist in a variety of oxidation states. The metal chlorides undergo disproportionation reactions leading to formation of seemingly colloidal metal in the melt. The... [Pg.159]

Both TEL and TML may be manufactured either by alkylation of a sodium-lead alloy, or by the electrolysis of an alkyl Grignard reagent. The first process is by far the most important and this will be described in some detail. Fig. 5.3 shows a flow diagram of the processes involved in TEL manufacture. TML is made by an essentially similar route, with the input of methyl chloride in place of ethyl chloride and the addition of a catalyst such as aluminium chloride, with acetone as a diluent. [Pg.80]


See other pages where Chloride aluminium electrolysis is mentioned: [Pg.215]    [Pg.364]    [Pg.546]    [Pg.317]    [Pg.724]    [Pg.786]    [Pg.546]    [Pg.344]    [Pg.98]    [Pg.39]    [Pg.232]    [Pg.286]    [Pg.300]    [Pg.317]    [Pg.724]    [Pg.786]    [Pg.29]    [Pg.167]    [Pg.183]    [Pg.269]    [Pg.297]    [Pg.15]    [Pg.69]    [Pg.162]    [Pg.714]    [Pg.28]    [Pg.73]    [Pg.131]    [Pg.120]    [Pg.340]    [Pg.281]    [Pg.482]    [Pg.251]   
See also in sourсe #XX -- [ Pg.120 ]




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