| 摘要 |
<p>Two-step process in the liquid phase for producing oximes at 60 - 100 DEG C and 1.5 - 5 bars, which comprises: (a) in a primary step, ammoximating a carbonylic compound with H2O2 and NH3 in the presence of a silicon, titanium and oxygen based catalyst; (b) oximating the residual carbonylic compound with a solution of hydroxylamine, obtained in its turn by oxidizing ammonia with H2O2, having a concentration comprised within the range of from 0.01 to 3%, preferably of from 0.5 to 2% by weight, in such a way as to have a molar ratio of hydroxylamine to the carbonylic compound comprised within the range of from 0.9 to 3, preferably of from 1 to 2. </p> |
