. Journal . convertedinto naphthoquinone and phthalic acid. The oxidation ismuch more energetic if a stronger sulphuric acid be ceric sulphate may be replaced by other ceric this method anthracene disulphouie acid yields thecorresponding anthraquinone disulphonic acid, and manyother oxidations in the anthracene series may be tetra-alkylated diamino-dipbenylmethanes yield thecorresponding hydrols, and triphenylmethane dyestuffs areproduced from their leuco bases. For the application toelectrolytic oxidation, see Pat. 729,502 ; this Journal,1903, 872.—E. F. I
. Journal . convertedinto naphthoquinone and phthalic acid. The oxidation ismuch more energetic if a stronger sulphuric acid be ceric sulphate may be replaced by other ceric this method anthracene disulphouie acid yields thecorresponding anthraquinone disulphonic acid, and manyother oxidations in the anthracene series may be tetra-alkylated diamino-dipbenylmethanes yield thecorresponding hydrols, and triphenylmethane dyestuffs areproduced from their leuco bases. For the application toelectrolytic oxidation, see Pat. 729,502 ; this Journal,1903, 872.—E. F. Indigo ; Manufacture of Halogenised end Analogue and Homologucs oj Indigo. J. Y. .Johnson, Auilin und Soda Fabrik. Eng. ,096, Aug. 16, 1902. See Fr. Pat. 323,977, Aug. 25, 1902; this Journal, 1903,491.—T. F. B. Dyestuffs [Azo Dyestuffs] Dyeing Cotton Directly ; Manufacture of . B. ■). Urquhart. Manchestei From Chem. Fabr. vorm. Weiler-ter Meer. Eng. Pat16,138, July 21, See Fr. Pat. 322,500, 1902 : this Journal, 1903, 360. —T. F. B. Polyuzo Dyestuffs [Azo Dyestuffs] ; Manufacture of Neiv . C. D. Abel. From Actien-Ges. fur An Fabrikatiou, Berlin. Eng. Pat. 20, 375, Sept. 18, 1902. See Pat. 717,550, Jan. 6, 1903; this Journal, 1903,140.—E. F. Colouring Matters [Sulphide Dyestuffs] : Manufacture of Intermediate Products and . Head HolHday and Son-, Ltd. ; Jos. Turner, 11. Dean, and Jas, 1 ,,rncr, Eng. Pat. 19,341, Sept. 3, 1902 or sulphonic acid iscondensed with by boiling inaqueous sodium carbonate or sodium acetate solution. >nbeating the products to 220 C. with sulphur and alkalisulphides, dyestuffs are obtain! d dyeing cotton in reddish-drab shades, very fast against light net fullii -I I V16 JOUKXAL OF THE SOCIETY OF CHEMICAL INDUSTRY. I \ - !K)8. Colouring Matters containing Snip/air [Sulphide Dye-stuffs] ; Manufacture of ISlue .!. V. Johnson. 1i
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectchemist, bookyear1882
