Anthracen, tr. and ed. by W. Crookes1877 |
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Pàgina 24
... washed , is exposed to very strong hydraulic pressure , and contains then from 30 to 35 per cent . of anthracen . The pressed cakes are ground and treated exactly like crude anthracen , containing more than 25 per cent . of actual ...
... washed , is exposed to very strong hydraulic pressure , and contains then from 30 to 35 per cent . of anthracen . The pressed cakes are ground and treated exactly like crude anthracen , containing more than 25 per cent . of actual ...
Pàgina 25
Gustav Auerbach sir William Crookes. stirred . The longer it is washed the better . Heat is not necessary , since cold naphtha purifies the anthracen very well if the action is sufficiently prolonged . The main point is that the crude ...
Gustav Auerbach sir William Crookes. stirred . The longer it is washed the better . Heat is not necessary , since cold naphtha purifies the anthracen very well if the action is sufficiently prolonged . The main point is that the crude ...
Pàgina 28
... washed with alcohol till the filtrate amounts to 300 c.c. The residue on the filter is then dried at 100 ° C. , weighed , and after deducting the weight of the paper , calculated as pure anthracen . Accord- ing to Faust , 20 grms . of ...
... washed with alcohol till the filtrate amounts to 300 c.c. The residue on the filter is then dried at 100 ° C. , weighed , and after deducting the weight of the paper , calculated as pure anthracen . Accord- ing to Faust , 20 grms . of ...
Pàgina 29
... washed with 30 grms . CS2 , the last third part of which is poured upon the filter three times . The residue is then pressed between folds of filter - paper , dried , and weighed . According to Déhaynin , 20 grms . of anthracen are ...
... washed with 30 grms . CS2 , the last third part of which is poured upon the filter three times . The residue is then pressed between folds of filter - paper , dried , and weighed . According to Déhaynin , 20 grms . of anthracen are ...
Pàgina 32
... washed first with water , then with hot , very dilute potash lye , then again with water , and dried at 100 ° C. After weighing , the anthraquinon is quickly removed from the filter , the latter is weighed again , and its weight is ...
... washed first with water , then with hot , very dilute potash lye , then again with water , and dried at 100 ° C. After weighing , the anthraquinon is quickly removed from the filter , the latter is weighed again , and its weight is ...
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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