| 摘要 |
<p>In the preparation of reaction products of hydrazine and carbonyl compounds, such as azines, by reacting ammonia with chlorine or compounds containing active chlorine, e.g. bleaching lye or chloramine, in aqueous phase and in the presence of a carbonyl compound, in accordance with the invention the hydrazine reaction product is recovered by having present a hydrophilic substance such as sodium or calcium chloride in amount sufficient to cause separation of the product into two phases, the lower of which is aqueous and the upper of which is organic and contains the hydrazine reaction product. If the hydrophilic substance is non-acidic so it will not interfere with the reaction, it can even be present from the outset.</p> |
