Institut Francais Du Pe'trole

Sophie Jullian

Michel Thomas

Karine Ragil

Etienne Lebas

Olivier Clause

Alexandre Rojey

Christine Travers

Jean-Pierre Durand

Ari Minkkinen

Larry Mank

G&eacute;rard Hotier

Jean-Louis Ambrosino

Jean-Francedillaois Joly

Pascal Mougin

Michel Bailly

Michel Thery

Pierre Capron

Annabelle Pina

Valerie Wiss-Henrard

Alain Chansolme

Method for modeling the flocculation conditions of hydrocarbon-containing fluids under pressure, related to a reference fluid. The asphaltenic properties are modeled from the results of an experimental study of a single asphaltenic reference fluid and by means of homothetic transformation laws. These reduced data allow to deal with asphaltenes flocculation in an industrial simulator working according to a simplified model. It is then possible to predict the amounts of asphaltenes that will flocculate in a reservoir or in a reactor during development, considering the variable pressure and composition conditions. Application: optimization of the development conditions of reservoirs or of an industrial reactor in which asphaltenic fluids undergo expansions.

Method for modeling asphaltenes flocculation conditions in hydrocarbon-containing fluids related to a reference fluid

For producing three effluents which are respectively rich in straight chain paraffins, in mono-branched paraffins, and in di-branched and tri-branched paraffins possibly with naphthenic and/or aromatic compounds, from C5-C8 cuts or intermediate cuts (C5-C7, C6-C8, C7-C8, C6-C7, C7 or C8), comprising paraffinic and possibly naphthenic and/or aromatic hydrocarbons, and in some cases olefinic hydrocarbons, a chromatographic separation process uses a separation zone operating by adsorption. The process of the invention is of particular application when coupled with a hydro-isomerization process, which selectively recycles straight chain and mono-branched paraffins, necessary for paraffins containing at least 7 carbon atoms.

Process for chromatographic separation of a C5-C8 feed or an intermediate feed into three effluents, respectively rich in straight chain, mono-branched and multi-branched paraffins

The invention provides a high octane number gasoline pool comprises at least 2% of di-branched paraffins containing 7 carbon atoms, and a process for producing this gasoline pool by hydro-isomerizing a feed constituted by a C5 to C8 cut which comprises at least one hydro-isomerization section and at least one separation section, in which the hydro-isomerization section and at least one separation section, in which the hydro-isomerization section comprises at least one reactor. The separation section comprises at least one unit and produces at least two streams: a first stream which is rich in di- and tri-branched paraffins, and possibly in naphthenes and aromatic compounds which is sent to the gasoline pool; and in a first version of the process, a second stream is produced which is rich in straight-chain and mono-branched paraffins which is recycled to the inlet of the hydro-isomerization section, while in a second version of the process, a second flux is produced which is rich in straight-chain paraffins which is recycled to the inlet of a first hydro-isomerization section and a third stream is produced which is rich in mono-branched paraffins which is recycled to the inlet of a second hydroisomerization section.

High octane number gasolines and their production using a process associating hydro-isomerization and separation

A method and plant to process a fluid comprising one or more compounds G,having a kinetic diameter less than or equal to that of nitrogen and one or more compounds G,having a kinetic diameter greater than or equal to that of methane. The method and plant use in combination, several adsorption and desorption stages during which a first stream F,mainly comprising compounds G,, a second stream F,enriched in compounds G,, a third stream F,mainly comprising compounds G,and a fourth stream F,mainly comprising compounds G,are produced. At least a fraction of stream F,is used to flush adsorption section A,.

Method and plant for processing a natural gas with high N2 contents and recycling

Process for recovering a solvent from a gas coming from a treating process using the solvent, the gas having a low temperature Ta and a high temperature Td, the difference Td-Ta being sufficient to carry out an adsorption step and a desorption step. The process is characterized in that/ a) a first solvent-containing gas stream is sent to an adsorption step, this gas being at a temperature Ta, at the end of this step the gas is practically solvent-free and the solvent is collected in a first adsorber, b) a second gas stream at a temperature Td, this gas being solvent-free, is sent to carry out desorption of a second adsorption means loaded with solvent during a previous step a), and c) the solvent is sent at least partly to a step of the treating process using the solvent.

Process for adsorbing and desorbing a solvent contained in a natural gas from a dehydration process

The invention concerns a process for isomerising a feed containing essentially hydrocarbons, preferably paraffins preferably containing 5 and/or 6 carbon atoms per molecule, in which said feed is treated in a distillation zone comprising an exhausting zone and a rectification zone associated with an isomerisation reaction zone, in the presence of an isomerisation catalyst and a gas stream containing hydrogen, characterized in that the reaction zone is at least partially internal to the distillation zone, and wherein the hydrogen-containing gas is fed by a dedicated gas distributor to the bottom of at least one catalytic bed within the isomerization reaction zone.

Paraffin isomerisation process using reactive distillation

Four adsorbers 1 to 4, each operating in a cycle comprising (described for adsorber 2): an adsorption step 1 wherein a feed from adsorber 2 is circulated to adsorber 2; an adsorption step 2 wherein feed is injected to the bottom of adsorber 2 and a product rich in isoparaffins is recovered from the head of adsorber 2; an adsorption step 3 wherein a portion of the fluid leaving adsorber 2 is sent to adsorber 3; an adsorption step 4 wherein the head of adsorber 2 receiving the feed is connected to the bottom of adsorber 3; a first depressurisation step 5 wherein adsorber 2 at high pressure is connected to adsorber 4 at a lower pressure; a second depressurisation step 6 wherein the head of adsorber 2 is closed; a stripping step 7 wherein the bottom of adsorber 2, which receives desorbent overhead, is connected to the top of adsorber 2; two principal stripping steps 8 and 9 wherein adsorber 2 alone is supplied with desorbent; a stripping finishing step 10 wherein adsorber 2 is continued to be supplied with desorbent and the outlet from the adsorber 2 is connected to adsorber 3; a first pressurisation step 11 to an intermediate pressure wherein the bottoms of adsorbers 2 and 4 are connected together; and a second pressurisation step 12 wherein a stream providing a portion of the effluent from adsorber 1 is introduced into the bottom of adsorber 2.

Process for the separation of isoalkanes/n-alkanes by gas phase

A process for the treatment of natural gas that contains an odorant at a storage site is described, with this process including a storage phase and a draw-down phase which involve at least two adsorbers A and B and in which, during the storage phase, the odorant is extracted from the gas and, during the draw-down phase; the water and H.sub.2 S that are contained in the gas are extracted.

Process for treatment of natural gas at a storage site

The isomerization of C.sub.5 /C.sub.6 n-paraffins to isoparaffins, comprises:

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Rueil Malmaison, France

Sophie Jullian