Compagnie Francaise De Raffinage

Compagnie Francaise Des Petroles

Philippe Engelhard

Joseph Edouard Weisang

Georges Szabo

Michel Legendre

Claude Marty

Guy Paris

Alain Muller

Joseph-Edouard Weisang

The invention relates to a process for the pretreatment of a light olefin fraction, or of a mixture of such fractions, for the purpose of selectively removing the isobutene and butadiene present. In accordance with the invention, the olefin fraction is contacted with boron trifluoride in the gas phase, under such conditions and for such a length of time that the isobutene and the butadiene will polymerize selectively, and the boron trifluoride and the isobutene and butadiene polymers obtained are then conventionally separated from the effluent.

Process for the pretreatment of light olefin fractions

A process for the oligomerization of olefin fractions where boron trifluoride in the gas phase is contacted with such a fraction, in the absence of a catalyst carrier, under such conditions and for such a length of time that the isobutene and/or butadiene present will polymerize; the boron trifluoride and the isobutene and/or butadiene polymers obtained are then conventionally separated from said fraction; and the olefins of the fraction so purified are oligomerized in the presence of a boron trifluoride catalyst comprising a catalyst carrier.

Process for the oligomerization of light olefin fractions in the

A catalyst suited for use in the sweetening of petroleum distillates (by oxidizing mercaptans to disulfides) which is formed of a metal complex of a polyaminoalkylpolycarboxylic acid deposited directly on a basic anion exchange resin. The method of making the source by exchanging a metal cation on an acidic resin; forming a complex by the action of a polyaminoalkylpolycarboxylic acid upon said resin; and exchanging the complex so formed on a basic anion exchange resin.

Catalyst for the oxidation of mercaptans to disulfides, process for the

Method of using catalysts for reforming or isomerizing hydrocarbons in

These catalysts comprise: A refractory oxide-mineral carrier; a halogen element, present in combined form; and, in free or combined form,

Catalysts for the hydrotreatment of hydrocarbons and use thereof in the

Hydrocarbon isomerization catalysts comprising typically refractory mineral oxide carrier such as alumina and a halogen element present in combined form, together with, in the free or combined state:

Hydrocarbon isomerization catalysts and procedures for the preparation

Catalysts particularly useful for hydroreforming and isomerization of hydrocarbons formed of a refractory mineral oxide carrier having a halogen in combined form and the following metals in free or combined state:

Catalysts for the hydrotreatment of hydrocarbons and their utilization

The improvement of the preferred Pt-Sn on alumina bimetallic catalyst (and similar catalysts) for hydrotreatment of hydrocarbons, comprising the catalyst further containing silicon in combined form.

Method of using catalysts for reforming or isomerizing hydrocarbons

In a combined process for the storage and production of hydrogen from a hydrogen reserve containing magnesium in the free or combined state, said process consisting of storing the hydrogen in the supply, decomposing the supply to produce hydrogen, and reconstituting the supply of hydrogenation; the use of a dope comprising two elements in the free or combined state selected from the group consisting of cerium, nickel, titanium and molybdenum. Said process may be applied to hydrogen reserves used to fuel internal-combustion engines and for similar applications.

Combined hydrogen storage and production process

The preparation of hydrogen reserves by mixing magnesium with at least one other appropriate element, compacting the mixture obtained, and hydrogenating it. Such additional element includes at least one element selected from the group consisting of group IIIB, including the rare earths, and groups IVB, VIB, VIIB, VIII, and IA of the periodic table. In particular, the mixture is subjected to a heat treatment between the compacting and hydrogenation steps. Such reserves prepared have reversible capacities even at moderate temperatures.

Process for the preparation of a hydrogen reserve

The improvment of the preferred Pt-Sn on alumina bimetallic catalyst (and similar catalysts) for hydrotreatment of hydrocarbons, comprising the catalyst further containing silicon in combined form.

Catalysts for hydrotreatment of hydrocarbons including methods of

The processes of the present invention employ catalysts in the hydrotreatment of hydrocarbons and comprise, on a refractory inorganic oxide support, the following metals:

Catalyzed processes for the hydrotreatment of hydrocarbons

A catalyst useful for the hydrotreatment of hydrocarbons comprising, on a refractory inorganic oxide support, the following metals: (a) from 0.02 to 2% of at least one platinum metal; (b) from 0.02 to 2% of at least one metal belonging to the group consisting of zirconium, titanium, and tungsten; (c) from 0.02 to 2% tin. This catalyst is preferably halogenated, typically with chlorine, from 0.4 to 2%. Catalysts according to this invention are particularly useful for isomerization of a charge of alkylaromatic hydrocarbons, and particularly those having eight carbon atoms. The preferred isomerization catalyst is a platinum, tin and zirconium trimetallic catalyst halogenated with chlorine approximately from 1 to 2% based on the total catalyst weight. Said catalysts are also useful for hydroreforming and aromatizing being surprisingly superior for all these types of reactions.

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Le Havre, France

Philippe Engelhard