With Magnesium Chloride

Whilst no detailed studies of this type of catalyst have appeared in the scientific literature, apart from in patent applications, some features of these systems have been outlined by Giannini.  

Industrial processes involving the use of these high activity catalysts are already being used for the production of polypropylene. 

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Present production processes use two stage counter-current extraction to remove americium from molten plutonium with magnesium chloride based salts. Both 35 mole % NaCl - 35 mole % KC1 - 3D mole % MgCl2 and 50 mole % NaCl-26 mole % CaCl2 - 24 mole % Mg Cl 2 are used for americium extraction. Figures 4 and 5 show the ternary phase diagrams for these salt systemsU0). 

There was a surprising fatal accident during which an iron container with magnesium chloride (probably moist) detonated. It was thought that the magnesium salt had catalysed the interaction between the metal and water. 

Similarly, basic magnesium chloride of indefinite composition is produced when magnesium hydroxide is mixed with magnesium chloride and water. The product is used as oxychloride cement (see Magnesium Oxide). 

The extraction oi potassium chloride from camallite.—Potassium chloride occurs associated with magnesium chloride in carnallite, and although formerly potassium chloride was principally obtained from sea-water—vide supra—much of the commercial salt is now obtained from carnallite, MgCl2.KC1.6H20, of the Stassfurt deposits. Crude carnallite contains the eq. of 16 per cent, of potassium chloride. 

A solution of normal sodium arsenate in aqueous ammonia and methyl or ethyl alcohol yields with lithium salts a pale pink precipitate which is quantitative and may be dried, ignited and weighed. An arsenite does not precipitate lithium. A mixture of the two acids may thus be quantitatively separated, the arsenate first by lithium in the presence of aqueous ammonia and alcohol, and the arsenite in the filtrate by precipitation with magnesium chloride solution.7... 

Table III. NMR chemical shifts for trimethoxymethylsilane with magnesium chloride ...

The submitters distilled the azeotrope immediately after heating the mixture to reflux. If it is allowed to stand and cool it sets solid with magnesium chloride and subsequent distillation results in appreciably lower yields. 

Treatment of 2-chloroglycidic esters 621 with magnesium chloride in THF under reflux forms the intermediate 3-chloro-2-keto ester 622. Cyclization occurs upon deprotection of the acetonide group, followed by elimination of water and tautomerization to afford 4-chloro-3-hydroxy-2//-pyran-2-ones in good yield (Scheme 135) <2004TL6299, 2005T2541>. 

How many grams of magnesium will be formed by heating 100 gm. of potassium with magnesium chloride (Equation is K2 + MgCL = Mg + 2 KCl.)... 

Kim, D.Y., Choi, J,S, and Rhie, D.Y., P-C bond cleavage of triethyl 2-fluoro-3-oxo-2-phosphonoac-etates with magnesium chloride. A synthesis of a-fluoro-P-keto esters, Synth. Commun., 27, 1097, 1997. 

Arsenic and iron concentrations in the sediment porewaters were found to be closely correlated. Although these concentrations are considerably elevated at depth in the sediment column—reaching 17 pM (1.3 mg/L) for arsenic and 1.6 mM (90 mg/L) for iron—only a small fraction of the iron and arsenic deposited to the sediments needs to be remobilized to support these concentrations. XAS analysis of the sediments indicated that arsenic in the solid phase is reduced from As(V) to As(III) above the depth at which arsenic is released into the porewater. Iron in solid phase remains as Fe(III). XAS analysis showed no evidence of conversion to magnetite (though conversion of ferrihydrite to goethite could not be excluded). Sequential extractions indicated that most of the arsenic can be released from sediment by treatment with magnesium chloride or phosphate solutions this treatment does not release iron, behavior that is consistent with sorption as a mode of association for the majority of the arsenic with the sediment. The remainder of the arsenic is released, along with almost all the iron, by treatment with hydrochloric acid.15... 

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