<正> The 600 kt/a ethylene revamp project at PetroChina Lanzhou Chemical Company has been approved by the State Council and the construction will be kicked off
Threemono-cyclopentadienyl metal complexes, [C6H4O2]CpTiCl (Ⅰ), [C12H8O2]CpTiCl (Ⅱ), and [C20H12O2]and 2,2'-bisnaphthol, respectively. In the presence of