Polymerization of ethylene with soluble complex catalysts based on cyclopentadienyl derivatives of vanadium and methylaluminium dichloride

Review of Recent Literature on Ziegler-Type Catalysts

“…D'vachkovskii and coworkers (D'vachkovskii et al, 1966Shilova et al, 1967), on the basis of electrodialytic investigations of the soluble catalyst The catalyst components were placed in the left chamber of the dialvzer, which was separated by a cellophane membrane from the right chamber containing only the AUCHspCl (Figure 1). Ethylene, bubbled into the right chamber of the dialyzer, was polymerized when a voltage was applied.…”

“…9, No. 'yachkovskii el al., 1966Shilova et al, 1967 catalyst activity, the configuration of the complex, and the oxidation state of the Ti in the soluble catalysts C H i TiCi AIF.tCi and (C-.HffiTiEtCl-AlEtCl,. From this work they concluded that active centers were quadrivalent, because the polymerization rate decreased to the same extent as Ti(IV) was reduced to Ti(III).…”