Anthracen, tr. and ed. by W. Crookes1877 |
Des de l'interior del llibre
Resultats 1 - 5 de 44.
Pàgina 26
... blue flocks of an exceedingly unpleasant odour . After distillation there remains in the retort a wax- like substance which takes fire on exposure to the air , and deposits on colder parts a white sublimate of carbazol . The distillate ...
... blue flocks of an exceedingly unpleasant odour . After distillation there remains in the retort a wax- like substance which takes fire on exposure to the air , and deposits on colder parts a white sublimate of carbazol . The distillate ...
Pàgina 27
... blue fluorescence . To pre- pare from the ordinary crude anthracen chemically pure anthracen with a blue fluorescence , is one of the most diffi- cult tasks . The yellow colouring matters are so difficult to remove , and adhere so ...
... blue fluorescence . To pre- pare from the ordinary crude anthracen chemically pure anthracen with a blue fluorescence , is one of the most diffi- cult tasks . The yellow colouring matters are so difficult to remove , and adhere so ...
Pàgina 34
... converted into sulphacids at temperatures far above 200 ° C. With the impurities the case is different . Chrysoquinon becomes at 100 ° C. an indigo - blue 34 ANTHRACEN . Preparation of pure alizarin Willgerodt's method.
... converted into sulphacids at temperatures far above 200 ° C. With the impurities the case is different . Chrysoquinon becomes at 100 ° C. an indigo - blue 34 ANTHRACEN . Preparation of pure alizarin Willgerodt's method.
Pàgina 35
... blue sulphacid , which turns brown on the addition of water . The same change takes place with the other hydrocarbons , or products of oxidation . If we take an anthraquinon which has under- gone Luck's subsidiary process , and heat it ...
... blue sulphacid , which turns brown on the addition of water . The same change takes place with the other hydrocarbons , or products of oxidation . If we take an anthraquinon which has under- gone Luck's subsidiary process , and heat it ...
Pàgina 36
... blue fluorescence . As long as they are tinged yellow by chrysogen even in the slightest degree , this phenomenon does not ap- pear . When pure , anthracen is perfectly tasteless and in- odorous ; it is sparingly soluble in alcohol and ...
... blue fluorescence . As long as they are tinged yellow by chrysogen even in the slightest degree , this phenomenon does not ap- pear . When pure , anthracen is perfectly tasteless and in- odorous ; it is sparingly soluble in alcohol and ...
Frases i termes més freqüents
acetic ether alcohol alcoholic solution alizarin alkali ammonia anthra anthracen anthracendihydride anthraflavic acid anthraquinon aqueous solution baryta barytic salt benzol bibromanthracen bisulphide of carbon blue bromine brown cent Centralblatt Chem chloride chromic acid chrysammic acid chrysophanic acid cold colouring matter compound concentrated sulphuric acid converted Crown 8vo crystallisation from alcohol crystals decomposed deposited deutsch dilute dinitroanthraquinon dissolves distillation dried Edition ether evaporation filtered filtrate flocks formation formed formula Gesellsch glacial acetic acid Graebe and Liebermann grms heated hydrate of potassa hydriodic acid hydrocarbon hydrochloric acid hydroxyls insoluble isopurpurin lime liquid madder mass melting melting-point methylanthracen mixture mordants naphthalin nitric acid obtained oxidation oxidising agents oxyanthraquinon Pharm phthalic acid potash powder precipitate purified purpurin quinon reaction readily soluble red colour residue Schunck Schützenberger soda soluble in alcohol soluble in water sparingly soluble sublimes substance sulpho-acids sulphuric acid temperature tion whilst Woodcuts yellow colour yellow needles yields
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