Chemical News and Journal of Industrial Science, Tomy 103-104Chemical news office., 1911 |
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Strona 19
... acid was never obtained , but disulphonic acids or a mixture of di- and tri - sulphonic acids always resulted . Carbazole is easily sulphonated by 67 per cent sulphuric acid , giving a disulphonic acid , differing from that of Schultz ...
... acid was never obtained , but disulphonic acids or a mixture of di- and tri - sulphonic acids always resulted . Carbazole is easily sulphonated by 67 per cent sulphuric acid , giving a disulphonic acid , differing from that of Schultz ...
Strona 29
... acid . It is diluted with water , and the silica is filtered off , weighed , and this with that previously obtained is the total silica . Iron , Alumina , and Manganese . - The solution from the silica is raised to boiling and the iron ...
... acid . It is diluted with water , and the silica is filtered off , weighed , and this with that previously obtained is the total silica . Iron , Alumina , and Manganese . - The solution from the silica is raised to boiling and the iron ...
Strona 30
... acid ( sp . gr . 1.11 ) . This solution from the extraction is evapo- rated to dryness , ammonium salts are destroyed by evaporation with a few drops of sodium carbonate solution , hydrochloric acid and a drop of sulphurous acid are ...
... acid ( sp . gr . 1.11 ) . This solution from the extraction is evapo- rated to dryness , ammonium salts are destroyed by evaporation with a few drops of sodium carbonate solution , hydrochloric acid and a drop of sulphurous acid are ...
Strona 54
... acid . It was evaporated to dryness , moistened with concentrated sulphuric acid , and heated until all hydrofluoric acid was expelled . Water was added , and the solution made alkaline with ammonia , filtered , the precipitate washed ...
... acid . It was evaporated to dryness , moistened with concentrated sulphuric acid , and heated until all hydrofluoric acid was expelled . Water was added , and the solution made alkaline with ammonia , filtered , the precipitate washed ...
Strona 67
... acid . This , the main product of the reaction , is a pale yellow crystalline solid , characterised by powerful reducing properties , by yielding formaldehyde on hydrolysis or by treatment with 50 per cent nitric acid , by the ...
... acid . This , the main product of the reaction , is a pale yellow crystalline solid , characterised by powerful reducing properties , by yielding formaldehyde on hydrolysis or by treatment with 50 per cent nitric acid , by the ...
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