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" F., and digest it repeatedly with coal-tar naphtha, until it is free from a brown substance which is extracted by the naphtha. Any other substance than coal-tar naphtha may be used in which the brown substance is soluble and the colouring matter is not... "
American Journal of Pharmacy - Página 569
1859
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Journal of the Chemical Society, Volumen69

Chemical Society (Great Britain) - 1896 - 948 páginas
...substance than coal-tar naphtha may be used in which the brown substance is soluble and the colouring matter is not soluble. I then free the residue from...methylated spirit, or any other liquid in which the colouring matter is soluble, which dissolves out the now colouring matter. I then separate the methylated...
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Patents for inventions. Abridgments of specifications, Volumen6

Patent office - 1859 - 846 páginas
...from a brown substance which is " extracted by the naptha." " Then free the residue from the " naptha by evaporation, and digest it with methylated spirit, or " any other liquid in which the colouring matter is soluble, which " dissolves out the new coloring matter. Then separate the " methylated...
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The British Coal-tar Industry: Its Origin, Development, and Decline

Walter Myers Gardner - 1915 - 484 páginas
...substance than coal-tar naphtha may be used in which the brown substance is soluble and the colouring matter is not soluble. I then free the residue from...methylated spirit, or any other liquid in which the colouring matter is soluble, which dissolves out the new colouring matter. I then separate the methylated...
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Transactions of the Pharmaceutical Meetings

1860 - 702 páginas
...substance than coal-tar naphtha may be used in which the brown substance is soluble and the colouring matter is not soluble. I then free the residue from...methylated spirit, or any other liquid in which the colouring matter is soluble, which dissolves out the new colouring matter. I then separate the methylated...
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