A u g . , 1914
T H E JOC'RNAL OF I N D C S T R I A L A N D ENGINEERING C H E M I S T R Y
703
RECENT INVENTIONS BY C. L. PARKER. Solicitor of Chemical I'atents, McGill Building, Washington, D. C.
Manufacturing Nitrogen Compounds. T. Fujiyama, March 17, 1914. U. S. Pat. 1,09o,jg1. q$y.1. This apparatus is designed for producing nitrogen compounds from carbids by t h e action of nitrogen. In the chamber I is mounted roller 12 made of fire-proof material. Carbon rods 13 capable of producing electric arcs or carbon resistors are arranged in a n annular series for heating the chamber. The material is brought on to roller 1 2 from pipe z and is said to absorb nitrogen while moving to the discharge pipe j which is water-jacketed to prevent decomposition of the nitrogen compounds produced
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electric current through a suitable electrolyte between electrode surfaces separated only by the electrolyte. Such evolution of gas a t the electrodes is maintained as will suffice to induce an active circulation of the electrolyte past the electrodes and effect depolarization, the lines of flow of the electrolyte passing electrodes of opposite polarity in rapid succession. I n the use of the apparatus illustrated for the manufacture of z?..z.
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Synthetic Caoutchouc.
C. K. F. L. Gross, March 24, 1914.
U. S. Pat. 1,090,847. Isoprene is heated in contact with trioxymethylene until a viscous mass is obtained. Potash from Feldspar. H. P. Bassett, March 24, 1914. U. S. Pat. 1,091,034. Feldspar is mixed with sodium acid sulfate, sodium chlorid, and a reducing agent, the reducing agent being employed in such quantity as to reduce only a part of the sulfate t o sulfid The mixture is heated to a bright red heat for from one to two hours and the water-soluble portion of the remaining mass is separated and the potash recovered from it. Treating Metals. E. G. Gilson, March 24, 1914. U. S. Pat. 1,091,057. Lletals are heated in a non-oxidizing atmosphere in contact with aluminum, aluminum oxid and a chlorid in order t o render them inoxidizable. Extracting Potassium and Sodium Compounds from Silicates which Contain Alkalis. A. Messerschmitt, March 24, 1914. U. S. Pat. 1,091,230. Soluble sodium and potassium compounds are produced from feldspar and similar materials by finely dividing such material and mixing it with a slime containing undried precipitated calcium carbonate resulting from a soda manufacturing process. The mixture is heated to a decomposing temperature and lixiviated. Sulfur Dioxid. H. K. Moore and R. B. Wolf, March 31, 1914. U. S. Pat. 1,091,689. Sulfur-bearing materials are burned and the products of combustion passed through a circulating body ofrefrigerated solvent for the sulfur dioxid gas such as a n aqueous calcium chlorid solution maintained a t a temperature of approximately 32 O F . The sulfur dioxid gas is extracted in vucuo from the solvent and refrigerated i n vacuo to liquefy it. Ammonia Production. S. peacock, April 7, 1914. U. S. Pat. 1,092,167. Ammonia is produced from a higher iron hydrid in the presence of free nitrogen by causing the iron hydrid to split off a portion of its hydrogen a t a temperature suitable for the nascent hydrogen thus produced to combine with the free nitrogen to form ammonia. Free hydrogen is simultaneously fed to the mass t o reform the higher iron hydrid as fast as the ammonia is produced. Making Catalyzers. C. Ellis, April 7, 1914. U. S. Pat. 1,092,206. An arc is formed between nickel electrodes in the presence of water and the finely divided nickel containing precipitate resul$ing from the eroding action of the arc is collected. Process of Making Chlorates.
G. Kolsky, April 7, 1914.
U. S. Pat. 1,092,369. Chlorates are produced by passing an
potassium chlorate, a considerable body of liquid is subjected to electrolytic action for several hours or until the percentage of chlorate has risen to a desired degree, whereupon the liquid is withdrawn and replaced by fresh electrolyte. There is no continuous flow of electrolyte into and from the apparatus, the circulation of liquid being due solely to the evolution of hydrogen a t the electrodes. Composition for Use in Matches. H. Staier, April 7, 1914. U. S. Pat. 1,092,408. A substitute for yellow phosphorus in the manufacture of match compositions is produced by thoroughly mixing red phosphorus, a metallic sulfid and sulfur in the proportions by weight of six parts of red phosphorus, two parts of metallic sulfid and three parts of sulfur. The mixtur; is heated to a temperature of about 500' F., washed with water a t a high temperature and dried. Precipitation of Metals from Cyanid Solutions. April 7, 1914. U. S. Pat. 1,092,765. precipitated from cyanid solutions by the action of aluminum in the form of dust. To avoid the expense of reducing aluminum t o dust form, the patentee employs aluminum in granular form, disposed within a rotating mill through which 9 the cyanid solution is conducted The attrition to which the granular pieces are continually subjected prevents the formation upon their surfaces of a deposit which would arrest the chemical action.
C. Butters, been I
Hardening or Treatment of Steel. A. W. Machlet, April 14, 1914. U. S. Pat. 1,092,925. The iron or steel under treatment is heated t o a t least a red heat in an atmosphere of ammonia whichhas been passed or filtered through kerosene and then in an atmosphere of ammonia alone.
