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T H E J O U R N A L OF I N D U S T R I A L AhTD E N G I N E E R I N G C H E M I S T R Y .
Nov., 1912
RECENT INVENTIONS Reported by C. L. Parker, Solicitor of Chemical Patents,McGill Building. Washington, D. C.
PROCESS OF PURIFYING HYDROGEN. . U.S. Patent No. 1,034,646,to Gustav H. Rabenalt, of Dover, New Jersey. By this process hydrogen is freed from hydrogen sulfid by passing it into a solution of iodin in a suitable solvent and simultaneously passing a n electric current through the solution. Sulfur is precipitated and the hydriodic acid formed is decomposed by the electric current into hydrogen and iodin.
to the action of nitric acid’diluted to a t least 35% of HNO, and carrying on the reaction a t a temperature not exceeding 8oo C. and under a pressure lower than 300 mm. of mercury. METHOD OF PRODUCING CARBON-BLACK. U. S. Patent No. 1,036,362,to John A. Snee, of West Elizabeth, Pennsylvania. Carbon-black, if allowed to remain in the presence of the heat necessary to decompose hydrocarbon gases will coke, thereby
METHOD OF PRODUCING REFINED METALS AND ALLOYS. U. S. Patent No. 1,034,784,to Albert E. Green, of Pueblo, Colorado, Assignor to American Electric Smelting and Engineering Company, of St. Louis, Missouri. In this process a n o r e change is smelted in a furnace of the character illustrated, and the gases from the top of the furnace are withdrawn and introduced into the bath of metal and slag
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detracting from its market value. The patentee prevents this deterioration by introducing the hydrocarbon gas horizontally into a highly heated, flame-excluded zone, the resulting carbon-
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which is maintained within selected temperatures by means of an electric current passed therethrough. In this way the metal is freed from undesirable elements which are oxidized and eliminated.
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PROCESS OF MANUFACTURE OF ALKALINE AND EARTHY ALKALINE NITRATES. U. S. Patent No. 1,036,611,to Philippe Auguste Guye and Georges Darier, of Geneva, Switzerland, and Allart van Vloten of Haarlem, Netherlands. In order to completely convert alkaline chlorids into nitrates i t is necessary to heat them several times with a n excess of nitric acid. Under these circumstances aqua regia is formed and a t the same time a large part of the excess nitric acid is decomposed
