Process for the preparation of polyalkenylsubstituted...

Details Process for the preparation of polyalkenylsubstituted... Process for the preparation of polyalkenylsubstituted...

C - Chemistry, Metallurgy

07

D

260/365.5

C07D 307/60 (2006.01) C08F 8/32 (2006.01) C08F 8/46 (2006.01) C10M 129/95 (2006.01) C10M 133/56 (2006.01)

Patent

CA 1151660

A B S T R A C T PROCESS FOR THE PREPARATION OF POLYALKENYL- SUBSTITUTED SUCCINIC ANHYDRIDE, THE PRODUCT SO PREPARED, AND A LUBRICATING OIL COMPOSITION CONTAINING THE PRODUCT The preparation of PIB/MALA in high yields (> 90%) by reacting polyisobutene (PIB) with maleic anhydride (MALA) in the presence of chlorine has the disadvantage of causing a relatively high chlorine percentage (? 6%w) in the PIB/MALA product. An after-reaction without chlorine addition (in the presence of excess MALA) results, after MALA has been stripped off, in a product with a chlorine percentage of ? 0.4%w. This percentage can now be further decreased to < 0.2%w when sub- jecting the PIB/MALA product to a thermal treatment at about 200°C after excess MALA has been stripped off.

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