US Government as Represented by the Secretary of the Army

William H Dennis, Jr

David H Rosenblatt

2,4- AND 2,6-Dinitrotoluenes mixed with small amounts of isomeric dinitrouene impurities are extracted with an alkane of 5 to 8 carbon atoms, whereby the isomeric dinitrotoluene impurities are removed.

Purification of crude dinitrotoluene by extraction with C.sub.5 -C.sub.8

2,4- AND 2,6-Dinitrotoluenes are separated from mixtures thereof with small mounts of isomeric dinitrotoluene impurities by suspending the mixture in an aqueous solution containing a small amount of an alkali metal disulfide. The isomeric dinitrotoluene impurities are thereby converted to products soluble in the aqueous solution from which the 2,4- and 2,6-dinitrotoluenes can be recovered in excellent yield.

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Braddock Heights, MD, United States of America

William H Dennis, Jr