| 摘要 |
1421250 Sulphonating olefins SNAMPROGETTI SpA 11 June 1973 [21 June 1972] 27780/73 Heading C2C [Also in Division C5] Sulphonates are produced by reacting olefins with alkali metal or ammonium bisulphite in a solvent medium including water and an alcohol, in the presence of oxygen and of a transition metal compound, and at a pH in the range 2-8À5 with the proviso that if the reaction temperature is below 60‹ C., the pH is in the range 5À5-8À5. Suitable transition metals include those of Groups I, VII and VIII, specifically Cu, Mn, Fe and Co. The bisulphite may be prepared in situ from SO 2 . The products include a substantial proportion of disulphonate and are said to be low in sodium sulphate. |
