Anthracen, tr. and ed. by W. Crookes1877 |
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Pàgina 23
... drying - room . For the purification of anthracen the most varied means have been proposed . It is recommended to be treated with solvents , sometimes cold and sometimes hot . Some propose alcohol or ligroin , others benzol , naphtha ...
... drying - room . For the purification of anthracen the most varied means have been proposed . It is recommended to be treated with solvents , sometimes cold and sometimes hot . Some propose alcohol or ligroin , others benzol , naphtha ...
Pàgina 25
... dried , the filtrate of naphtha is distilled , and the residue left in the still is treated like a crude anthracen of a low percentage . The oils last obtained may either be burnt , by driving them under the steam boiler by means of a ...
... dried , the filtrate of naphtha is distilled , and the residue left in the still is treated like a crude anthracen of a low percentage . The oils last obtained may either be burnt , by driving them under the steam boiler by means of a ...
Pàgina 28
... dried at 100 ° C. , weighed , and after deducting the weight of the paper , calculated as pure anthracen . Accord- ing to Faust , 20 grms . of anthracen are treated with 150 c.c. of boiling alcohol at 95 per cent .; cooled down to 15.5 ...
... dried at 100 ° C. , weighed , and after deducting the weight of the paper , calculated as pure anthracen . Accord- ing to Faust , 20 grms . of anthracen are treated with 150 c.c. of boiling alcohol at 95 per cent .; cooled down to 15.5 ...
Pàgina 29
... dried and weighed . After deducting the filter the residue is the amount of pure anthracen . The anthracen thus obtained must have a melting - point not below 200 ° C. and not above 212 ° C. , taking as the melting - point the mean ...
... dried and weighed . After deducting the filter the residue is the amount of pure anthracen . The anthracen thus obtained must have a melting - point not below 200 ° C. and not above 212 ° C. , taking as the melting - point the mean ...
Pàgina 32
... dried at 100 ° C. After weighing , the anthraquinon is quickly removed from the filter , the latter is weighed again , and its weight is deducted from the gross amount of the anthraquinon . To the nett weight thus obtained 0 · 01 grm ...
... dried at 100 ° C. After weighing , the anthraquinon is quickly removed from the filter , the latter is weighed again , and its weight is deducted from the gross amount of the anthraquinon . To the nett weight thus obtained 0 · 01 grm ...
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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