The volume ratio (GOR) is the ratio between the determined volumes of gas and oil The volume of oil (Vo) is determined by measuring the amount of organic carbon (TOC) in the drilled rock taking into account physical characteristics of the drilled rock and of the oil in the surface ...
Syndio-isoblock polymers of 1-olefins having molecular chains which contain syndiotactic and isotactic sequences are obtained if the polymerization of the 1-olefins is carried out using a catalyst which is composed of a bridge chiral metallocene of the formula I ##STR1## an an aluminoxane. The...
gas space of the reactor of 0.1% was set by metered addition of hydrogen and was later kept constant during the first polymerization stage by further metered addition. 8 mg of dimethylsilanediylbis(2-methyl-4,5-benzo-6,7-dihydro-1-indenyl)zirconium dichloride (rac:meso ratio >20) were ...
and the ligand system of the compound of the formula I is different from 4-(η5 -3'-alkylcyclopentadienyl)-4,6,6-trimethyl-(η5 -2-alkyl-4,5-tetrahydropentalene). 2. The stereorigid metallocene compound of the formula I as claimed in claim 1, wherein M1 is a metal of group IVb...
to 0.01 mmol of Al per kg of reactor contents. Preference is given to triisobutylaluminum and triethylaluminum in a concentration of from 10 to 0.1 mmol of Al per kg of reactor contents. This enables a low molar Al/M ratio to be selected in the synthesis of a supported catalyst system....
The residue was extracted with 50 cm3 of toluene and the combined filtrates were freed of solvent in an oil pump vacuum. This gave 9.0 g of the metallocene as a mixture of the racemic and meso forms in a ratio of 1:1 in the form of a yellow powder. The pure racemate (5) could ...