Sasol Technology Proprietary Limited

Paul Jacobson

Johan Pieter De Wet

Wilhelmina Jansen

Ivan Philip Greager

Mieke Ann Desmet

Jan Hendrik Scholtz

Edward Ludovicus Koper

Philip Alex Vogel

Luis Pablo Fidel Dancuart

A hydrocarbon synthesis process () includes feeding gaseous reactants () into a slurry bed (), allowing the gaseous reactants () to react catalytically, thereby to form liquid and gaseous hydrocarbon products, and subjecting a product mixture comprising liquid product and catalyst particles in a filtration stage to filtration, by passing the liquid product through a filtering medium () to separate catalyst particles from the liquid product. The gaseous products are withdrawn () and cooled to form a multi-phase product which is separated to produce at least a hydrocarbon condensate stream () and a tail-gas stream (). At least a portion of the hydrocarbon condensate stream () is treated () to remove oxygenated components therefrom, producing a backflush condensate. From time to time, the filtering medium () of the filtration stage is backflushed by passing the backflush condensate through the filtering medium ().

Process for producing liquid and gaseous products from gaseous reactants

This invention relates to a process for producing linear alkyl benzene and linear paraffins, the process including the steps of obtaining a hydrocarbon condensate containing olefins, paraffins and oxygenates from a low temperature Fischer-Tropsch reaction; a) fractionating a desired carbon number distribution from the hydrocarbon condensate to form a fractionated hydrocarbon condensate stream; b) extracting oxygenates from the fractionated hydrocarbon condensate stream from step a) to form a stream containing olefins and paraffins; c) alkylating the stream containing olefins and paraffins from step b) with benzene in the presence of a suitable alkylation catalyst; and d) recovering linear alkyl benzene and linear paraffin.

Production of linear alkyl benzene

This invention relates to a process for producing linear alkyl benzene, the process including the steps of obtaining a hydrocarbon condensate containing olefins, paraffins and oxygenates from a low temperature Fischer-Tropsch reaction; a) fractionating a desired carbon number distribution from the hydrocarbon condensate to form a fractionated hydrocarbon condensate stream; b) extracting oxygenates from the fractionated hydrocarbon condensate stream from step (a) to form a stream containing olefins and paraffins; c) combining the stream containing olefins and paraffins from step (b) with the feed stream from step (g) to form a combined stream; d) alkylating olefins in the combined stream from step (c) with benzene in the presence of a suitable alkylation catalyst in an alkylation reactor; e) recovering linear alkyl benzene from the alkylation reactor; f) recovering unreacted paraffins from the alkylation reactor; g) dehydrogenating the unreacted paraffins in the presence of a suitable dehydrogenation catalyst to form a feed stream containing olefins and paraffins; and h) sending the feed stream containing olefins and paraffins from step (g) to step (c).

This invention relates to a commercially viable process for extracting oxygenates from a hydrocarbon stream, typically a fraction of the condensation product of a Fischer-Tropsch reaction, while preserving the olefin content of the condensation product. The oxygenate extraction process is a liquid-liquid extraction process that takes place in an extraction column using a polar organic solvent, such as methanol, and water as the solvent, wherein the polar organic solvent and water are added separately to the extraction column.

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Sasolburg, South Africa

Paul Jacobson