Sasol Technology Proprietary Limited

Sasol Technology (Pty) Limited

Richard Neil Walsh

Kevin Blann

Matthew James Overett

Craig McGregor

John Thomas Dixon

David Hedley Morgan

Annette Bollmann

Esna Killian

Denise Louisette Venter

Nicolaus Ladislaus Stark

Palesa Nongodlwana

Anton Kleingeld

Kenny Tenza

Marcel Juergen Krause

Johannes Henning Viljoen

Albertus Maritz Van Wyk

Hendrik Wilhelmus Joubert

Jean Louis Gauché

Craig Mcgregor

A method () of synthesizing Fischer-Tropsch products () includes feeding a synthesis gas () to a moving-bed Fischer-Tropsch synthesis reactor () containing a Fischer-Tropsch catalyst in a moving catalyst bed and catalytically converting at least a portion of the synthesis gas () in the moving catalyst bed to Fischer-Tropsch products (). The Fischer-Tropsch products () are removed from the moving-bed Fischer-Tropsch synthesis reactor (). The method () further includes, while the moving-bed Fisher-Tropsch synthesis reactor () is on-line, withdrawing a portion () of the Fischer-Tropsch catalyst from the moving-bed Fischer-Tropsch synthesis reactor (), adding a reactivated Fischer-Tropsch catalyst () to the moving-bed Fischer-Tropsch synthesis reactor (), and adding a fresh Fischer-Tropsch catalyst (), in addition to the reactivated catalyst (), to the moving-bed Fischer-Tropsch synthesis reactor ().

Fischer-tropsch synthesis

A process () for oligomerising a hydrocarbon to form at least one co-monomer product () includes feeding a hydrocarbon reactant and organic liquid diluent solvent () into an oligomerisation reactor (). The organic liquid diluent solvent has a normal boiling point below the normal boiling point of 1-hexene but above &#x2212;20&#xb0; C., or the organic diluent solvent is in the form of a solvent admixture with at least 70% by mass of the solvent admixture constituting organic diluent solvents having a normal boiling point below the normal boiling point of 1-hexene but above &#x2212;20&#xb0; C. The oligomerisation reactor () holds at least one co-monomer product formed in the oligomerisation reactor admixed with a catalyst system () introduced into the oligomerisation reactor (). The catalyst system () includes a catalyst dissolved in at least one catalyst solvent. At least a portion of the hydrocarbon reactant is oligomerised in the reactor () to form co-monomer product and polymeric by-product as part of a liquid product, which is withdrawn. When there is only one catalyst solvent and only one organic liquid diluent solvent, the catalyst solvent and the organic liquid diluent solvent are not the same solvent. When there is more than one catalyst solvent or more than one organic liquid diluent solvent, at least one of the catalyst solvents is not also used as organic liquid diluent solvent or at least one of the organic liquid diluent solvents is not also used at the catalyst solvent. The mass ratio of all organic liquid diluent solvent introduced into the oligomerisation reactor to all catalyst solvent introduced into the oligomerisation reactor over a selected time period is between 15:1 and 4500:1.

Process for oligomerising a hydrocarbon to form at least one co-monomer product

A process for polymerizing or oligomerising a hydrocarbon includes feeding at a low level a liquid hydrocarbon reactant into a bulk liquid phase comprising polymeric or oligomeric product admixed with a catalyst. The liquid hydrocarbon reactant is allowed to vaporise to form bubbles rising through the bulk liquid phase and to polymerise or oligomerise to form the polymeric or oligomeric product, with the rising bubbles creating turbulence in the bulk liquid phase, thereby mixing the bulk liquid phase. Gaseous components comprising any unreacted vaporised hydrocarbon reactant and any gaseous product that may have formed are withdrawn from a head space above the bulk liquid phase. Liquid phase from the bulk liquid phase is withdrawn to maintain the bulk liquid phase at a desired level.

Process for polymerising or oligomerising a hydrocarbon

This invention relates to a process for producing an oligomeric product by the oligomerization of at least one olefinic compound by contacting the at least one olefinic compound with an oligomerization catalyst in an aliphatic liquid medium at a reaction temperature of at least 50&#xb0; C. The catalyst comprises the combination of a source of a transition metal; and a ligating compound of the formula (R)X(Y) X(R).

Oligomerisation of olefinic compounds in an aliphatic medium

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Vanderbijlpark, South Africa

Richard Neil Walsh