Continental Oil Company

Morris A Johnson

Kang Yang

Charles M Starks

James D Reedy

Certain organic or organic-aqueous halide exchange reactions are catalyzed by carbon black.

Carbon black catalysis

The present invention relates to an improved process for removing iron ions from an aqueous acid solution with a minimum removal of copper ions contained therein comprising the steps of combining an organic quaternary salt with the aqueous acid solution in an amount of at least about 0.01% by weight of said solution, adjusting the pH of the solution to a value in the range of from about 2.0 to about 2.5 so that iron ions contained in the solution are hydrolyzed and precipitated and then separating the precipitate from the solution.

Removal of iron from aqueous acid solutions containing iron and copper

Tetrabutylammonium bromide is prepared buy mixing n-butylbromide with tributylamine in acetonitrile, in an inert atmosphere, under reflux conditions for a sufficient period of time to form a solution containing tetrabutylammonium bromide, cooling the resulting solution; mixing the solution with water, thus forming a mixture; and recovering tetrabutylammonium bromide in high yield from the mixture.

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Ponca City, OK, United States of America

Morris A Johnson