Process for the preparation of succinic anhydride derivatives

摘要: Process for the preparation of polyolefin-­substituted succinic anhydrides essentially free from chlorine and in which average molar ratio groups to polyolefin chains is greater than 1.3:1, comprises heating a with excess maleic anhydride, containing at least 70% terminal groupings structure having an alpha olefinic bond and/or structures equilibrium such structures.