Sentence Examples


  • On nitration it gives orthoand para-nitrotoluenes - which on reduction yield the valuable toluidines, C6H4(CH3)(NH2) - and on sulphonation the parasulphonic acid is formed with a little of the ortho acid.
  • Meta-aminophenol is prepared by reducing metanitrophenol, or by heating resorcin with ammonium chloride and ammonia to 200° C. Dimethyl-meta-aminophenol is prepared by heating meta-aminophenol with methyl alcohol and hydrochloric acid in an autoclave; by sulphonation of dimethylaniline, the sulphonic acid formed being finally fused with potash; or by nitrating dimethylaniline, in the presence of sulphuric acid at 0° C. In the latter case a mixture of nitro-compounds is obtained which can be separated by the addition of sodium carbonate.
 
 

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