The New Encyclopædia BritannicaEncyclopædia Britannica, 1983 - Encyclopedias and dictionaries |
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Page 184
... acid alkylation . Concentrated sulfuric acid ( 98 percent ) is used as the catalyst , and the process is carried out in reaction vessels of mild steel , as corrosion of this material with concentrated acid is relatively low . The ...
... acid alkylation . Concentrated sulfuric acid ( 98 percent ) is used as the catalyst , and the process is carried out in reaction vessels of mild steel , as corrosion of this material with concentrated acid is relatively low . The ...
Page 195
... acid precipitated by acidification with hy- drochloric acid . Salicylic acid is used in medicine as the free acid , as its acetyl derivative , aspirin ( see below Es- terification ) , and as its salts , of which the most important is ...
... acid precipitated by acidification with hy- drochloric acid . Salicylic acid is used in medicine as the free acid , as its acetyl derivative , aspirin ( see below Es- terification ) , and as its salts , of which the most important is ...
Page 196
... acid solution to dissolve almost all of it . A slight excess of ammonia solution is then added , and the residual ferric hydroxide filtered off . The clear , reddish - brown filtrate is evaporat- ed to a syrup , a little ammonia being ...
... acid solution to dissolve almost all of it . A slight excess of ammonia solution is then added , and the residual ferric hydroxide filtered off . The clear , reddish - brown filtrate is evaporat- ed to a syrup , a little ammonia being ...
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