Ethyl Corporation

James D Johnston

Robert N Sanders

James M Wood, Jr

Richmond M Starrett

Suk Joong Im

A process for the preparation of organic acid halide such as acetyl chloride by reacting an organic acid anhydride with a silicon halide, such as silicon tetrachloride, under conditions such that such the organic acid halide is produced along with silica which is easily separated and disposed of. Preferred conditions include use of a solvent, use of a catalyst and additional process reaction steps whereby by-products are converted to additional organic acid halide and easily disposable waste products.

Process for preparation of organic acid halide

Magnesium metal is produced by the reaction of aluminum metal with a calcium magnesium aluminate slag or with magnesium oxide in the presence of such slag, wherein the silicon dioxide content of the slag is maintained at five weight percent or less. An excess of aluminum metal relative to the amount of magnesium oxide is employed thereby obtaining a high conversion of the magnesium oxide to magnesium metal.

Process for producing magnesium utilizing aluminum metal reductant

Magnesium metal is produced by the reaction of aluminum metal with a calcium magnesium aluminate slag or with magnesium oxide in the presence of such slag, wherein the silicon dioxide content of the slag is maintained at five weight percent or less.

Magnesium metal is produced by the reaction of aluminum-silicon alloy with a calcium magnesium aluminate silicate slag or with magnesium oxide in the presence of such slag, at a temperature of about 1,400.degree.-1650.degree. C and a pressure of 25-500 millimeters of mercury.

Process for producing magnesium utilizing aluminum-silicon alloy

A process for extracting nickel from a low-grade nickel complex ore. The process features simultaneously grinding and leaching of the ore with an aqueous ammoniacal leach solution.

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Baton Rouge, LA, United States of America

James D Johnston