Sentence Examples


  • The aldehydes may be prepared by the careful oxidation of primary alcohols with a mixture of potassium dichromate and sulphuric acid,-3R�CH OH+K Cr 07+4H SO = K2S04+ Cr (SO) +7H O+3R�CHO; by distilling the calcium salts of the fatty acids with calcium formate; and by hydrolysis of the acetals.
  • It is then oxidized to anthraquinone by means of sodium dichromate and sulphuric acid in leaden vats, steam heated so that the mixture can be brought to the boil.