Petroleo Brasileiro S.a. - Petrobras

Polialden Petroquimica S.a.

Odyr Do Coutto Filho

Jaime Correia Da Silva

Roberto Barcala Haag

Juan Raul Abarca

Noemi Tatizawa

A process is described for the production of synthetic basestocks from an alpha-olefin feedstock with carbon number in the range C.sub.7 -C.sub.30 the feedstock having origin in an ethylene polymerization process, the process comprising contacting the feedstock with a solid or soluble cationic AlCl.sub.3 catalyst. After separation and distilling out of the light fraction of the oligomer, a basestock of excellent viscometric, rheological and thermal stability properties is obtained. The basestocks so obtained are also described.

Synthetic basestocks and process for producing same

Description of the preparation of a Ziegler type catalyst system through impregnation of a special alumina with 0.8-1.0% by weight of titanium derived from a dilute solution of titanium halide in n-hexane, the activator employed being triisobutylaluminum or triethylaluminum at an (Al)/(Ti) molar ratio of 2.5/1 to 80/1 in the catalyst. The catalyst system has high efficiency and yield, and leads to polyethylenes of excellent physical and mechanical properties which make it particularly suitable for use in engineering plastics.

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Rio de Janeiro, Brazil

Odyr Do Coutto Filho