Anthracen, tr. and ed. by W. Crookes1877 |
Des de l'interior del llibre
Resultats 1 - 5 de 56.
Pàgina 26
... added . The caustic potash can be recovered from the residue in the retort by lixiviation and boiling with lime . Distillation with caustic potash is said to destroy the chrysen present ; but this destruction extends also to the ...
... added . The caustic potash can be recovered from the residue in the retort by lixiviation and boiling with lime . Distillation with caustic potash is said to destroy the chrysen present ; but this destruction extends also to the ...
Pàgina 32
... added in small por- tions , so that the liquid may not cease to boil gently . This is continued until a distinct and permanent greenish yellow colour appears , or till , after prolonged boiling , a drop of the liquid placed upon a clean ...
... added in small por- tions , so that the liquid may not cease to boil gently . This is continued until a distinct and permanent greenish yellow colour appears , or till , after prolonged boiling , a drop of the liquid placed upon a clean ...
Pàgina 33
... added drop by drop until it is no longer reduced , and a red colour appears instead of the green . A little oxalic acid and sulphuric acid are then added to reduce the excess of permanganate , and to dissolve the peroxide of manganese ...
... added drop by drop until it is no longer reduced , and a red colour appears instead of the green . A little oxalic acid and sulphuric acid are then added to reduce the excess of permanganate , and to dissolve the peroxide of manganese ...
Pàgina 35
... added , and the whole heated in the water - bath , or better , to 112 ° C. in the air - bath , for ten minutes . It is then allowed to cool , when the anthraquinon crystallises out , diluted with much water , boiled , let cool , and ...
... added , and the whole heated in the water - bath , or better , to 112 ° C. in the air - bath , for ten minutes . It is then allowed to cool , when the anthraquinon crystallises out , diluted with much water , boiled , let cool , and ...
Pàgina 37
... added to anthracen dissolved in alcohol , on treatment with zinc - powder and potassa lye , or tin and hydrochloric acid . Preparation by means of Sodium - amalgam . Anthracen dissolved in alcohol is treated with sodium- amalgam till a ...
... added to anthracen dissolved in alcohol , on treatment with zinc - powder and potassa lye , or tin and hydrochloric acid . Preparation by means of Sodium - amalgam . Anthracen dissolved in alcohol is treated with sodium- amalgam till a ...
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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