Sasol Technology (pty) Limited

Sasol Chemical Industries Limited

Deon De Wet-Roos

Kevin Blann

John Thomas Dixon

Esna Killian

Dawid Johannes Joubert

Nonhlanhla Jillian Phelembe

Aletta Du Toit

The invention provides a process for polymerising olefins to branched polyolefins in the presence of a polymerisation catalyst and a cocatalyst, wherein the cocatalyst produces 1-octene in a selectivity greater than 30%.

Tandem tetramerisation-polymerisation of olefins

This invention relates to a process for producing a polymeric product by the polymerisation of at least one olefinic compound in the form of an olefin or a compound including an olefinic moiety by contacting the at least one olefinic compound with a polymerisation catalyst. The catalyst comprises the combination of a source of a Group IV to VI transition metal; and a ligating compound of the formula(R)X(Y)X(R).The process is characterised therein that when Rand Rare independently a hydrocarbyl group or a heterohydrocarbyl group which contains at least one non-polar substituent, the olefinic compound is contacted with the polymerisation catalyst at a reaction temperature from and above 70&#xb0; C.; and where Rand Rare independently a hydrocarbyl group or a heterohydrocarbyl group which contains no substituent, the olefinic compound is contacted with the polymerisation catalyst at a reaction temperature from and above 90&#xb0; C.

Polymerisation of olefinic compounds

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Meyerton, South Africa

Deon De Wet-Roos