Elf France

Elf Aquitaine Production

Elf Antar France

Michele J Breysse

Thierry Des Courieres

Christophe Geantet

Jean-Louis Portefaix

Jean-Rene Bernard

Michel L Vrinat

Michel Danot

Thierry J Barbou Des Courieres

Pavel Afanasiev

Martine Boulinguiez

Jacek Orlewski

Jean R Bernard

Christian Gachet

Michel L Lairoix

Martine Cattenot

Catalyst comprising at least one zirconium oxide, characterized in that it consists, for at least 85% of its weight, of a thermally stable support with a specific surface greater than or equal to 150 m.sup.2 /g containing from 60 to 99 weight % of at least one zirconium oxide and from 40 to 1 weight % of at least one metal oxide of at least one metal chosen from the group consisting of metals from Groups V, VI and VII, noble metals such as ruthenium, osmium, rhodium, iridium and uranium, and the elements phosphorus, arsenic and sulphur, the support being obtained by the molten salts technique by introduction of a mixture of salts into a eutectic mixture of alkali metal nitrates or sulphates which, after dehydration, is maintained between 250.degree. and 550.degree. C., from 30 minutes to 5 hours.

Catalysts based on highly dispersed metal oxides, comprising in

Hydrorefining catalyst containing ruthenium sulphide, its synthesis and

Catalyst for hydrorefining hydrocarbon feedstocks including niobium trisulphide, said catalyst is particularly suited for the scission of carbon-nitrogen and carbon-sulphur bonds.

Hydrorefining process employing a niobium trisulfide-containing catalyst

This invention relates to a hydrorefining catalyst containing ruthenium sulphide and cobalt and/or nickel sulphide on a refractory oxides support. These catalysts are only very slightly inhibited by polyaromatic compounds or hydrogen sulphide.

Hydrorefining catalyst containing sulphides of ruthenium and of at least

Catalyst for hydrorefining hydrocarbon feedstocks consisting of niobium trisulphide, bulk or deposited on an inert support. This catalyst is particularly efficient for the reactions of scission of carbon-nitrogen and carbon-sulphur bonds.

Catalyst for hydrorefining hydrocarbon feedstocks containing niobium

This invention relates to a method of hydrotreating hydrocarbon-based charges by using a catalyst that comprises V.sub.2 S.sub.3 prepared in situ in the reaction zone or V.sub.2 S.sub.3 prepared outside this zone but treated in this zone by a sulphurating agent. The hydrotreating method according to the invention can be used to treat hydrocarbon-based charges such as gasoline, gasoil, refinery residues and heavy crude oils, thus allowing the elimination of impurities such as nitrogen, sulphur and metals. The method can also be used to hydrogenize the olefins and the aromatics and possibly lead to rupture of the carbon-carbon bonds.

Method for hydroprocessing hydrocarbon-based charges

The invention relates to a process for the regeneration of an aromatization catalyst containing a metal of Group VIII supported on zeolite, the process being such that the catalyst is subjected to combustion, and then to oxychloration. According to the invention, the oxychloration step is followed by a hydratation step. The treatment according to the invention increases the selectivity of the regenerated catalyst.

Regeneration process of an aromatization catalyst containing a Group

Monofunctional dehydrocyclization catalyst of paraffins, characterized in that it contains: 0.1 to 1.5% platinum, o.1 to 1.5% rhenium incorporated in the form of carbonyl, a small proportion of sulphur introduced by a sulphur compound reducible or decomposable by hydrogen such that the ratio x of the number of sulphur atoms to the number of platinum and rhenium atoms deposited on the catalyst be comprised between 0.05 and 0.6, the carrier being constituted by a zeolitic crystalline aluminosilicate compensated in more than 90% by alkaline cations having a pore diameter of more than 6.5 Angstroms.

Catalyst for production of aromatic hydrocarbons and process for

A process for the production of aromatic hydrocarbons from petroleum fractions containing paraffins which comprises passing said charge in the presence of hydrogen at 400.degree. C.-550.degree. C. over a catalyst containing from 0.1 to 1.5% by weight of at least one metal selected from the group consisting of platinum, rhenium, iridium, tin and germanium and containing sulfur in a sulfur/metals atomic ratio of from 0 to less than 1, supported on a crystalline, aluminum silicate zeolite containing alkaline cations, said zeolite having a pore dimension larger than 6.5 Angstroms, wherein the catalysts are in fixed beds in two reactors or sets of reactors arranged in parallel and operate at a pressure on the order of from 0.5 to 8 absolute bars wherein when a reactor set (DHC.sub.1 ) is producing aromatic hydrocarbons the other reactor set (DHC.sub.2 ) is swept by the hydrogen produced by the first reactor set (DHC.sub.1) at a temperature adequate for reactivating the catalyst, then inverting the roles of the two sets.

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Caluire, France

Michele J Breysse