Amine-exchange reactions of aliphatic Mannichbases involving nitrogen heterocycles, such as 2-(2-dimethylaminoethyl)-substituted pyridine, quinoline, benzothiazole, and 3,3-dimethyl-3H-indole, with arylamines readily provided the corresponding aromatic Mannichbases which are otherwise hardly accessible.
Olefin polymerisation catalysts and processes for producing olefin polymers
申请人:TOSOH CORPORATION
公开号:EP0849292A1
公开(公告)日:1998-06-24
Catalysts for olefin polymerization which consist essentially of a transition metal compound, a modified clay compound and an organic aluminum compound, wherein the modified clay compound comprises a reaction product of a clay mineral and a proton acid salt of a specific amine compound, as well as a method of polymerizing olefins using such catalysts. It is possible thereby to obtain olefin polymers with high productivity and low ash content.