Sasol Technology (Pty) Limited

Sasol Technology Proprietary Limited

Hulisani Maumela

John Thomas Dixon

David Hedley Morgan

Fiona Millicent Hess

Kevin Blann

Matthew James Overett

Annette Bollmann

Esna Killian

Peter Wasserscheid

David Shane McGuinness

Stefanus Otto

Arno Neveling

Annette Bollman

David Shane Mcguinness

Moses Mokgolela Mogorosi

Munaka Christopher Maumela

Molise Stephen Mokhadinyana

Michael James Green

Johannes Alexander Willemse

Palesa Nongodlwana

Lana Pepler

Hamdani Ahmed Mahomed

Jacobus Johannes Cronje Grove

Jacobus Johannes Grove

A process for the tetramerisation of ethylene under solution phase conditions is carried out in the presence of an activated catalyst at a temperature above 80&#xb0; C. and up to a temperature of about 130&#xb0; C. The activated catalyst is provided by combining a source of chromium, a ligating compound, which ligating compound includes at least one fluorine substituted hydrocarbyl group, organoheteryl group, or heterohydrocarbyl group, and optionally a catalyst activator or combination of catalyst activators.

Tetramerisation of ethylene

According to the present invention there is provided a process for producing an oligomeric product by the oligomerisation of at least one olefinic compound including: A) providing an activated oligomerisation catalyst comprising the combination of: i) a source of a transition metal; ii) a ligating compound of the formula (R)X(Y)X(R)iii) a metal containing activator; and (iv) at least one olefinic compound; B) diluting the activated oligomerisation catalyst of A with an introduced liquid medium; and C) contacting the at least one olefinic compound to be oligomerised with the diluted activated catalyst of B to produce an oligomeric product.

Oligomerisation of olefinic compounds in the presence of a diluted metal containing activator

This invention relates to the oligomerisation of olefinic compounds in the presence of an oligomerisation catalyst activated in two stages by two catalyst activators According to the invention there is provided a process for activating an oligomerisation catalyst by contacting the catalyst with i) a first activator component selected from the group consisting of the aluminoxanes and a mixture of at least one aluminoxane and at least one organylaluminium compound, and ii) a second activator component which is an organylaluminium compound, the process being characterised therein that the oligomerisation catalyst is first contacted with one of the first activator component or second activator component, and the resulting mixture is thereafter contacted with the other of the first activator component or second activator component.

Two stage activation of oligomerisation catalyst and oligomerisation of olefinic compounds in the presence of an oligomerisation catalyst so activated

This invention relates to a process for the oligomerization of at least one olefinic compound in the form of an olefin or a compound including art olefinic moiety by contacting the at least one olefinic compound with at least two different catalysis, namely a tetramerization catalyst and a further oligomerization catalyst. The tetramerization catalyst comprises a combination of a source of a transition metal and a ligating compound of the formula (R)X(Y)X(R). The invention also relates to an oligomerization catalyst comprising the combination of (i) source of transition metal for both a tetramerization catalyst and a trimerization catalyst; (ii) a ligating compound for a tetramerization catalyst: (iii) a different ligating compound for a trimerization catalyst: and (iv) optionally an activator.

Oligomerisation in the presence of both a tetramerisation catalyst and a further oligomerisation catalyst

The invention provides a mixed heteroatomic ligand for an oligomerization of olefins catalyst, which ligand includes at least three heteroatoms, of which at least one heteroatom is sulfur and at least two heteroatoms are not the same. The invention also provides a multidentate mixed heteroatomic ligand for an oligomerization of olefins catalyst, which ligand includes at least three heteroatoms of which at least one is a sulfur atom. The ligand may also contain, in addition to sulfur, at least one nitrogen or phosphorous heteroatom.

Trimerisation and oligomerisation of olefins using a chromium based catalyst

The invention describes a process for trimerisation olefins, which process includes the step of contacting an olefinic feedstream with a catalyst system which includes a transition metal compound and a heteroatomic ligand and wherein the trimer is an olefin and wherein the heteroatomic ligand is described by the following general formula (R)A-B-C(R).

Trimerisation of olefins

The invention describes a process for tetramerisation of olefins wherein the product stream of the process contains more than 30% of the tetramer olefin. The process includes the step of contacting an olefinic feedstream with a catalyst system containing a transition metal compound and a heteroatomic ligand.

Tetramerization of olefins

The invention provides a mixed heteroatomic ligand for an oligomerisation of olefins catalyst, which ligand includes at least three heteroatoms, of which at least one heteroatom is nitrogen and at least two heteroatoms are not the same. The invention also provides a multidentate mixed heroatomic ligand for an oligomerization of olefins catalyst, which ligand includes at least three heteroatoms. At least one heteroatom may be nitrogen and at least 2 heteroatoms may not be the same.

The invention provides a mixed heteroatomic ligand for an oligomerisation of olefins catalyst, which ligand includes at least three heteroatoms, of which at least one heteroatom is sulfur and at least 2 heteroatoms are not the same. The invention also provides a multidentate mixed heteroatomic ligand for an oligomerisation of olefins catalyst, which ligand includes at least three heteroatoms of which at least one is a sulfur atom. The ligand may also contain, in addition to sulfur, at least one nitrogen or phosphorous heteroatom.

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Johannesburg, South Africa

Hulisani Maumela