Institut Francais Du Pe'trole

Total Sa

Julia Magne-Drisch

Fabio Alario

Elisabeth Merlen

Jean-Fran&ccedil;ois Joly

Sylvie Lacombe

Eric Benazzi

Vincent Coupard

G&eacute;rard Hotier

Florent Picard

Alain Forestiere

Renaud Cadours

Alain Methivier

Fr&eacute;d&eacute;ric Kolenda

Lo&iuml;c Rouleau

G&eacute;rard Miquel

Marc Reymond

Bruno Delfort

Eric Sanchez

Christophe Gueret

Jean-Francois Joly

Nathalie Marchal-George

Ari Minkkinen

Christian Streicher

Pierre Galtier

Eric Lemaire

Loic Rouleau

Jean-Francedillaois Joly

Stephane Kressmann

Jean Elgue

Nathalie Ferrer

Olivia Martin

Gauthier Perdu

Damien Roquet

Viep Hoang Dinh

Pierre Bigeard

Jean-Paul Cousin

Aurélien Hainault

Christina Streicher

Anne-Claire Lucquin

The present invention relates to a method of removing acid gases, notably carbonyl sulfide, contained in gaseous effluents, comprising: The method can comprise a second aqueous solution regeneration stage. The regeneration stages are carried out by expansion and/or thermal regeneration.

Method of removing acid gases contained in gaseous effluents

The method allows to remove mercaptans contained in a gaseous feed comprising hydrocarbons by carrying out the following stages:

Mercaptan removal method

The invention provides a method of extracting the hydrogen sulfide contained in a gas comprising aromatic hydrocarbons, wherein the following stages are carried out: a) contacting said gas with an absorbent solution so as to obtain a gas depleted in hydrogen sulfide and an absorbent solution laden with hydrogen sulfide, b) heating and expanding the hydrogen sulfide-laden absorbent solution to a predetermined temperature and pressure so as to release a gaseous fraction comprising aromatic hydrocarbons and to obtain an absorbent solution depleted in aromatic hydrocarbons, said temperature and pressure being so selected that said gaseous fraction comprises at least 50% of the aromatic hydrocarbons and at most 35% hydrogen sulfide contained in said hydrogen sulfide-laden absorbent solution, c) thermally regenerating the absorbent solution depleted in aromatic hydrocarbon compounds so as to release a hydrogen sulfide-rich gaseous effluent and to obtain a regenerated absorbent solution.

Method of extracting the hydrogen sulfide contained in a hydrocarbon gas

The invention relates to a process for the production of a gasoline with a low sulfur content starting from an initial gasoline that comprises olefins, thiophene compounds and mercaptans and comprises a stage for treating at least one fraction of the initial gasoline under conditions of alkylation of the thiophene compounds by the olefins, a stage for treating at least one fraction of the effluent that is obtained from the preceding stage under conditions of addition of the olefins to the mercaptans, and a distillation stage for obtaining a light fraction that is low in thiophene compounds and mercaptans, and a heavy fraction that is high in sulfur.

Process for desulfurization of gasolines

A process for regeneration of a catalyst that comprises at least one EUO-structural-type zeolite in acid form and at least one hydro-dehydrogenating metal, used in a process for isomerization of a hydrocarbon feedstock that comprises aromatic compounds with eight carbon atoms, comprising at least a) a stage for eliminating a majority of the coke, deposited on said catalyst, by combustion in the presence of a gas that contains oxygen at a temperature that is less than or equal to 600&#xb0; C., and b) a stage for oxychlorination of the product that is obtained from stage a), carried out between 200 and 550&#xb0; C. in the presence of at least one gas mixture that contains at least oxygen, water and chlorine and/or at least one chlorinated compound, is described.

Process for regeneration of a catalyst that contains an EUO-structural-type zeolite

The invention relates to a method for pretreatment of a solid catalyst that is obtained by a reaction between an inorganic binder and phosphoric acid, whereby said method comprises a stage in which said catalyst is brought into contact with a mixture of hydrocarbons under swelling conditions of the catalyst up to a predetermined volume increase, with no significant volume constraint on said catalyst. The invention also relates to an operating process of said catalyst in an alkylation or oligomerization reactor.

Method for pretreatment of catalysts with a phosphoric acid base

Process for obtaining a hydrocarbon fraction that can be used as a feedstock of an etherification unit and that contains a small amount of diene compounds, nitrogen-containing compounds and sulfur-containing compounds, starting from an initial hydrocarbon feedstock that comprises a mixture of olefins, dienes, and nitrites as well as sulfur-containing compounds, whereby said process comprises at least the following successive stages:

Process for obtaining a feedstock that can be used in an etherification unit

Process for pretreating a catalyst based on an EUO zeolite under severe conditions

The invention relates to a process for the production of at least one isomer of xylenes, preferably paraxylene, as well as benzene, starting from a C8-aromatic fraction, whereby said process comprises a zone for separation of xylenes, a zone for isomerization of aromatic compounds with 8 carbon atoms used in the presence of a catalyst that comprises at least one EUO-structural-type zeolite that is selected from among the EU-1, TPZ-3, ZSM-50 zeolites and at least one metal of group VIII of the periodic table, and finally a transalkylation zone of C7- and C9-aromatic compounds. The invention makes it possible to produce paraxylene and benzene with a high yield, starting from a C8-aromatic fraction that comprises a large amount of ethylbenzene with improved performance levels of the isomerization stage and a good conversion of ethylbenzene in the transalkylation stage.

Process for the production of an isomer of xylenes in three stages: separation, isomerization in the presence of a catalyst based on an EUO zeolite and transalkylation

The invention concerns a zeolite with structure type EUO comprising EUO zeolite crystals with a size of less than 5 &mgr;m, at least a portion of the EUO zeolite crystals being in the form of EUO zeolite aggregates, characterized in that the granulometry of the aggregates is such that Dv,90 is 500 &mgr;m or less. The invention also concerns the preparation of the zeolite and the use of the zeolite as a catalyst, for example in a process for isomerising aromatic compounds containing 8 carbon atoms per molecule.

EUO zeolite comprising crystals and aggregates of crystals with specific granulometrys and its use as a catalyst in the isomerisation of C8 aromatic compounds

A process for the production of at least one xylene isomer, paraxylene, metaxylene or orthoxylene from an aromatic feedstock that has 7 to 10 carbon atoms per molecule. The process comprises a stage for transalkylation of C7- and C9-aromatic compounds, a stage for separation of xylenes and a stage for isomerization of xylenes. The isomerization catalyst used in the process comprises at least one EUO zeolite composition whose crystals are grouped in aggregates that have a grain size with a value of Dv,90 less than or equal to 500 microns and at least one element of group VIII.

Production of a xylene isomer in three stages: separation, isomerization with a catalyst with an EUO zeolite base and transalkylation with recycling of C10-aromatic compounds

A process for the production of paraxilene comprises an adsorption stage ( ) using toluene as a desorbent in a simulated moving bed of a feedstock previously depleted in ethylbenzene by distillation ( ) or by adsortion, an isomerization stage ( ) without hydrogen in liquid phase diluted with toluene from the raffinate produced, a distillation stage ( ) of the raffinate that is isomerized to recover the toluene ( ) that is recycled. The separated isomerate is introduced into a xylene distillation column ( ). The separated ethylbenzene is isomerized separately in gas phase with hydrogen at higher temperature and is distilled ( ) in the presence of a catalyst that comprises an EUO-structural-type zeolite, then recycled to adsorption stage ( ).

Process for the production of paraxylene that comprises an adsorption stage, a liquid phase isomerization stage and a gas phase isomerization stage with an euo-type zeolite

The invention concerns a process for producing at least one compound selected from 2-, 3-, 4-, 5- and 6-phenylalkanes by alkylating benzene using at least one olefin containing at least 9 carbon atoms per molecule, in the presence of a catalyst comprising at least one zeolite with structure type EUO, at least partially in its acid form and at least one matrix, said zeolite comprising silicon and at least one element T selected from the group formed by aluminium, iron, gallium and boron (preferably aluminium and boron), with an Si/T atomic ratio of more than 5; said process being carried out at a temperature in the range 30&deg; C. to 400&deg; C., a pressure in the range 0.1 to 10 MPa, with an hourly space velocity of 0.50 to 200 h , and a benzene/olefins mole ratio in the range 1:1 to 50:1.

Process for production phenylalkanes using a catalyst based on a zeolite with structure type EUO

A process for the production of at least one isomer of xylenes comprising a simulated moving-bed adsorption ( ) of a C8-aromatic feedstock ( ) that delivers a paraxylene-rich fraction ( ) that is optionally purified after a distillation ( ) by at least one high-temperature crystallization ( ) and a fraction ( ) that is low in paraxylene is described. Fraction ( ) is distilled and then isomerized ( ) in the presence of an EUO-structural-type catalyst. The lightest hydrocarbons are removed from the isomerization effluent in a first distillation ( ) then naphthenes in a second distillation ( ), and distilled isomerization effluent ( ) that results therefrom is recycled at least in part in adsorption ( ). A mother liquor ( ) that results from the crystallization stage is recycled at least in part in adsorption ( ).

Process for the production of at least one isomer of xylenes that comprise an adsorption stage and an isomerization stage with an euo-structural-type catalyst

A process for co-production of paraxylene and ethylbenzene comprises: (A) an adsorption stage of a feedstock of xylenes and ethylbenzene in a simulated moving bed that produces an extract of pure paraxylene and an ethylbenzene-rich raffinate; (B) an adsorption stage in a simulated moving bed, of raffinate from which desorbent has been removed that supplies an essentially pure ethylbenzene extract and an orthoxylene and metaxylene raffinate that contains desorbent; (C) a recover stage for the desorbent; (D) an isomerization stage for the orthoxylene and metaxylene raffinate in the presence of a catalyst that comprises an EUO-type zeolite; and (E) a stage for recycling the isomerate that is produced with adsorption.

Process for co-production and separation of ethylbenzene and paraxylene

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Vilette de Vienne, France

Julia Magne-Drisch