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T f f E JOCR.Y-IL OF I.YDCSTRIAL AAYD E Y G I S E E R I S G C H E - I I I S T R Y
Mar., 1913
RECENT INVENTIONS B y C. L. PARKER, Solicitor of Chemical Patents, McGill Building, Washington, D. C.
Suspensible Sulfur. H. W. Hillyer, Dec. 24, 1912. U. S. Pat. 1,048,161. The patentee claims the invention of a new form of sulfur which he terms suspensible sulfur, the material being suspensible in water and which, when so suspended, is not coagulable by sulfuric acid. The product is to be used as a fungicide.
orthophosphoric acid for from 24 to fibers to remove the adherent acid.
72
hours and washing the
Gasolene Manufacture. W. M. Burton, Jan. 7, 1913. U. S. Pat. 1,049,667. On distilling a t from 65oo-8jo0 F. thc volatilc constituents of the liquid portions of the paraffin series of petroleum distillations having a boiling point upward of 5ooo F.,
Recovery of Sulfuric Acid and Iron from Ferrous-Sulfate Sludge. C. A. Weeks, Dec. 24, 1912. U. S. Pat. 1,048,247. I n the patentee's preferred process, concentrated ferrous sulfate solution is sprayed into the upper end of a heated, slightly inclined, rotating, tubular furnace, heated by a jet of gas admitted to the lower end of the furnace. The ferrous sulfate is gradually heated within the furnace until the greatest temperature zone is reached, a t which the calcination of the ferrous sulfate crystals takes place with the result t h a t ferric PA
oxid is formed and the whole content of sulfur gases with other vapors are released. The ferric oxid is discharged from the lower end of the furnace, while the sulfur gases and other vapors pass from the higher end of the furnace where the temperature zone is cool and are delivered into the condensing tower where i t is subjected to treatment of a spray of weak solution of sulfuric acid. This condenses and absorbs the contained sulfuric acid gas, the other gas passing on. The absorbed sulfuric acid gas is withdrawn from the condensing tower and stored or used over again; the ferric oxid is collected from the lower end of the furnace, cooled and recovered as ferric oxid free from sulfur.
low-boiling products of the same series are obtained, by maintaining a pressure of 4 to 6 atmospheres on the vapors throughout their course from the still through the condenser and while undergoing condensation. From time to time the accumulations of gas from the products of condensation are released. Nitric Acid. Moest and von Berneck, Jan. 7, 1913. U. S. Pat. 1,049,754, In the production of concentrated nitric oxid gases it has been found that a more concentrated nitric acid is obtained if oxygen is used instead of atmospheric air for converting these gases into nitric acid in the presence of water.
Formic Acid. W.H.Walker, Dec.31, 1912. U.S. Pat. 1,048,609. I n making formic acid by the reaction of sulfuric acid on a formate, the patentee uses a formate substantially free from water whereby the reaction proceeds without injurious rise of temperature or substantial loss of formic acid. Waterproofing Concrete. A. C. Horn, Dec. 31, 1912. U. S. Pat. 1,048,695. The composition comprises Chinese wood oil, calcium stearate and casein, and a preservative compound. Electric-Furnace Lining. Frederick M. Becket, Jan. 7, 1913. U. S. Pat. 1,049,801. The lining consists of a refractory material having an adherent facing of ferrotungsten reduced from the refractory material. Luminous or Flaming Arc Electrode. Joseph L. R. Hayden, Jan. 7, 1913. U. S. Pat. 1,049,854. Thc electrode contains titanium carbid and cerium titano-fluorid. Tar-Paint Manufacture. Friedrich Raschig, Jan. 7, 1913. U. S. Pat. 1,049,916. The paint consists of an emulsion of tar, clay and water, produced by mixing clay with water and then gradually stirring tar and water into the mixture until the tar is uniformly distributed. Purifying Asbestos. W. C. Arsem, Jan. 7, 1913. U. S. Pat. 1,049,972. Difficultly removable iron oxid is removed from asbestos by soaking the crude material in a joyc solution of
The patentee charges with oxygen the apparatus serving for the conveyance of the liquid in the absorption system and reintroduces the oxygen leaving the apparatus simultaneously with the entrained vapors containing the nitric acid. Non-Inflammable Cellulose Compound. W. G. Lindsay, Jan. 7, 1913. U. S. Pat. 1,050,065. The composition contains IOO parts of acetyl cellulose, from I O to 20 parts of triphenylphosphate and from I to z parts of urea in admixture with acetylenetetrachlorid and acetone. Concentrated Nitric Acid. Moest and von Berneck, Jan. 14, 1913. U. S. Pat. 1,050,160. The patentees produce concentrated nitric acid in a direct way by treating dilute nitric acid with a mixture of nitrogen peroxid and oxygen. The mixture is subjected to the action of oxygen to expel the non-oxidized nitric oxid gases from the nitric acid.
