Heumann, Karl

Heumann, Karl, Die Anilinfarben und Ihre Fabrikation, 4 vol. in 7, Braunschweig, Vieweg,... 

Ann,y 1876, clxxxi, 129 1876, clxxxii, i 1876, clxxxiii, 102 1876, clxxxiv, 206 Phil, Mag,y 1877, iii, I, 89, 366 Karl Heumann (Darmstadt, 10 September 1850-Zurich, 5 August 1893), assistant in Darmstadt Polytechnic, professor in Zurich Polytechnic (1878) he also worked on ultramarine. 

Since Baeyer s work was more directed to the elucidation of the structure of indigo, the synthesis he had discovered could not be applied economically on a large scale. Karl Heumann, at the Federal Polytechnic in Zurich, discovered a method of synthesis which was based on phenylglycine, which can be produced from aniline and chloroacetic acid. The yield from this process, however, was still unsatisfactory. Heumann s second proposal used phenylglycine-o-carboxylic add, obtained by first oxidizing naphthalene to phthalic anhydride. 

John C. Bailar, Jr., Karl F. Heumann, and Edwin J. Seiferle, The Use of Punched Card Techniques in the Coding of Inorganic Compounds, J. Chem. Educ. 25 142 (1948). 

For example, the indigo synthesis depended on Adolf Baeyer at Munich, after 1875, and Karl Heumann at ETH, Zurich, who discovered the basis of industrial manufacture in 1890. 

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