At appropriate polymerization conditions the binarycatalyst system shows a good synergic effect, the polymerization activity is higher than any single catalyst.
在合适的聚合条件下此复式催化剂具有很好的协同作用，其催化活性比任一单一催化剂的催化活性都高。
2
The invention relates to a binary alkyl benzene sulfonic acid rare earth catalyst, a preparation method and the application thereof.
本发明涉及二元烷基苯磺酸稀土催化剂及制法和应用。
3
The bleached natural shellac product with low chlorine content was prepared by means of catalytic hydrogenation of the bleached shellac in the presence of Ni-Fe binary-metal catalyst and hydrogen.