Assignee: Elf France

Location: Paris, FR
No. of patents: 35

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Number	Title	Issue Date
5433755	Additive formulation for fuels incorporating ester function products and a detergent-dispersant Additive formulation for engine fuels incorporating at least one constituent (A) and at least one constituent (B), constituent(A) consisting of at least one composition incorporating products resulting from the reaction of at least one dicarboxylic compou...	07/18/1995
5234476	Polynitrogen compound having two terminal cycles of the imide type, their preparations and uses Polynitrogen compound having two terminal cycles of the imide type, its preparation by conventional organic chemistry methods and its use as an additive for engine fuel. This compound complies with the general formula (I): ##STR1## in which R	08/10/1993
5073309	Device for dispersion of gas in a liquid phase A device for dispersing a gaseous phase in a liquid phase comprises at least one Venturi ejector with a vertical or inclined axis, composed of a mixer head (1) for admitting the liquid, a neck (2) for admitting the gas, and an injector tube (3). The injec...	12/17/1991
5021175	Additives to lubricating oils having extreme pressure, antiwear and antioxidant effects, process for preparation thereof and lubricating compositions containing said additives Lubricating oil additives are provided which have extreme pressure, antiwear and antioxidant properties. The additives are dithiophosphorous disymmetric bisulphides of the formula: ##STR1## wherein X and Y represent an oxygen or sulphur atom or a met...	06/04/1991
5007733	Process and device for determining the cloud point of a diesel oil The present invention concerns a process and a device for determining the cloud point of a diesel oil, comprising a light source and, aligned on a single axis, a diaphragm comprising a central hole on the said axis, an objective forming the image of the h...	04/16/1991
4970025	Cationic emulsions of bituminous binders of the type bitumen/polymer and cationic emulsifying system preferably utilizable for obtaining said emulsions This invention provides cationic emulsions of bituminous binders of the bitumen/polymer type, formed by a dispersion of an organic phase of the binder in an aqueous phase containing a cationic nitrogenous emulsifier and a mineral or organic acid, the acid...	11/13/1990
4772648	Cationic emulsions of bituminous binders of the type bitumen/polymer and cationic emulsifying system preferably utilizable for obtaining said emulsions This invention provides cationic emulsions of bituminous binders of the bitumen/polymer type, formed by a dispersion of an organic phase of the binder in an aqueous phase containing a cationic nitrogenous emulsifier and a mineral or organic acid, the acid...	09/20/1988
4756819	Process for the thermal treatment of hydrocarbon charges in the presence of additives which reduce coke formation This invention concerns a process for the thermal treatment of hydrocarbon charges having a high content of asphaltenes in the presence of additives which prevent coke formation. The additive according to the invention is a salt of a metal selected from V...	07/12/1988
4737158	Self-lubricating coal and hydrocarbon fraction based fuel composition A self-lubricating fuel composition is provided formed from powdered coal, a hydrocarbon fraction, water, a surfactant and a strong electrolyte. This composition develops a lubricating layer between the mechanical parts in relative movement with respect t...	04/12/1988
4681680	Device for the selective and continuous recovery of hydrocarbons present in the form of a sheet at the surface of an aqueous medium Device allowing the selective and continuous recovery of hydrocarbons present in the form of a sheet or nappe at the surface of an aqueous medium. It is essentially constituted by a roller covered with a hydrophobic and oleophilic material 5 partially sur...	07/21/1987
4653604	Suspension and or shock-absorbing device for a support arm of a vehicle wheel Suspension and/or shock-absorber device of a rotary support arm of a vehicle wheel such as the rear wheel of a motorcycle, comprising disposed on one side of the support arm, a three arms lever mounted rotary-wise on a lever axle integral with the chassis...	03/31/1987
4641849	Manual actuating device, especially for steering a motorcycle A manual actuating device for a motorcycle steering that allows the motorcyclist to push and pull right and left handles to affect turning of the motorcycle. Each handle is connected through a three bar set to a rotatable connecting bar which is integral ...	02/10/1987
4622047	Homogeneous and stable composition of asphaltenic liquid hydrocarbons and additive useful as industrial fuel Industrial fuels comprised of mixtures of asphaltenic heavy hydrocarbon fractions and light fractions are provided wherein the flocculation of asphaltenes is minimized by the addition of from 50 to 5000 ppm of an additive composed of a constituent A and/o...	11/11/1986
4611086	Process for hydration of olefins A process for the preparation of aliphatic alcohols by hydration of olefins in the presence of a catalyst comprising a zeolitic crystalline silicoaluminate of the offretite type. The offretite used can be natural or sythetic. Particularly convenient among...	09/09/1986
4610696	Process for the formation of homogeneous fuel compositions containing a petroleum cut and at least one short chain aliphatic alcohol and compositions thereby obtained The present invention concerns a process for the formation of homogeneous fuel compositions containing a petroleum cut and at least one short chain aliphatic alcohol, essentially methanol, ethanol and the butanols, through dilution with an additive consti...	09/09/1986
4606309	Device for controlling the combustion chambers exhaust and/or intake for internal combustion engines Device for controlling the circulation of gases from and towards an internal combustion engine, wherein a sealing ring is provided with means for injecting a lubricating and cooling liquid such as oil in the gap between a continuous sealing surface around...	08/19/1986
4595047	Device for attaching an element for rotation in a tube A device for attaching an element for rotation in a tube comprises a conical sleeve, a hook and a link-pin. The link-pin interconnects the hook and the sleeve while permitting rotation of the hook. A particular application of the attachment device is to p...	06/17/1986
4588422	Process and equipment for sampling a gaseous effluent and their application to chromatography The present invention concerns a process and equipment for drawing off a sample for a chromatographic analysis installation. In addition to the chromatographic analysis apparatus 22 per se and a set of rotary pneumatic valves to which it is normally assoc...	05/13/1986
4584064	Device and installations for the distillation by thin layer evaporation particularly of hydrocarbons, and process for operating this device The present invention concerns a process for the thin layer evaporation of liquid in which the thin layer to be evaporated is formed by centrifugation. It is characterized in that the pointed part of the said cone is immersed in a reserve of liquid to be ...	04/22/1986
4576648	Cationic emulsions of bituminous binders of the bitumen type and their process of preparation Cationic emulsions of bituminous binders of the type consisting of an organic phase formed of a bituminous binder dispersed in an aqueous phase containing a cationic emulsifying agent and an acid. The bituminous binder is a bitumen-polymer type binder and the ...	03/18/1986
4574749	Counterbalanced piston rotary machine Counterbalancing device in a rotary machine comprising at least one piston axially movable in a cylinder, such as a heat engine and equipped per cylinder with at least one rotating distributor. The distributor, on the one hand, is driven in rotation at th...	03/11/1986
4567222	Process for preparing bitumen-polymer compositions, application to these compositions of the obtention of coverings and mother solution of polymer usable for the obtention of the said compositions Bitumen-polymer compositions are prepared, by mixing, at between 130° C. and 230° C., a bitumen with a styrene and conjugated diene copolymer and a sulphur source, the copolymer and the sulphur source being added to the bitumen either directly, or in th...	01/28/1986
4553622	Supporting arm assembly for a driving wheel of an automotive vehicle An oscillating supporting arm assembly for the driving wheel of a motorcycle, includes an arm mounted to oscillate angularly about a connecting shaft of the motorcycle and cooperating with a suspension assembly between the arm and motorcycle, the wheel be...	11/19/1985
4543195	Friction-reducing lubricating compositions each comprising an additive The present invention concerns novel lubricating compositions effective in reducing friction, for use, particularly, in turning machines and remarkable in that the additive comprises by at least one mono- or di-substituted carboxylic acid substituted in t...	09/24/1985
4536594	Process for the preparation of beta-disubstituted monocarboxylic acids A process for the preparation of beta-disubstituted monocarboxylic acids derived from tertiary acyclic, monocyclic or bicyclic hydrocarbons. The process consists in reacting said hydrocarbons with vinylidene chloride and either a functional compound where...	08/20/1985
4497703	Hydrotreatment for petroleum cuts with offretite The present invention concerns a hydrotreatment process for petroleum cuts, in order to achieve simultaneously their desulfurization and the improvement of their flow properties. The process comprises treating the cuts in the presence of a catalytic syste...	02/05/1985
4493901	Regeneration process of an aromatization catalyst containing a Group VIII metal on a zeolite 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 in...	01/15/1985
4417083	Process for the dehydrocyclization of paraffins at low pressure 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° C.-550° C. over a catalyst containing from 0.1 to 1.5% by weight of at least one ...	11/22/1983
4416806	Catalyst for production of aromatic hydrocarbons and process for preparation 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 decompo...	11/22/1983
4374282	Ethers of polyols, their preparation and use Ethers of polyols are prepared by reaction of a polyol and an organic chloride in a two phase medium in the presence of a phase transfer catalyst. The ethers of polyols are useful as synthetic lubricants, as lubricant bases, as lubricant additives and as ...	02/15/1983
4367074	Novel filter aid compositions for improving the limiting filterability temperature and inhibition of n-paraffin crystal formation during low temperature of middle distillates Novel filter aid compositions enabling the improvement of limiting filterability temperature and the simultaneous inhibition of settling of the n-paraffin crystals formed at low temperature, comprising a mixture: of a compound A chosen from among the group of ...	01/04/1983
4363719	Process for improving the stability of catalysts for the catalytic hydrotreatment of petroleum cuts The invention relates to a process to improve the stability of a catalyst to be used for lowering the cloud or turbidity point and the filterability limit temperature of gas-oils. The catalyst is formed of a composite system constituting 5 to 90% of a hyd...	12/14/1982
4330449	Process for preparation of compositions of bitumen polymers and products A method of preparation of polymer-asphalt (bitumen) compositions which comprises mixing, with agitation, at a temperature of 130° to 230° C., 80 to 98% by weight of an asphalt having a penetration between 30 to 220, and 2 to 20% by weight of a polybloc...	05/18/1982
4287076	Product suitable for the storage and conveyance of thermal energy This invention concerns the storage and conveyance of thermal energy at low temperature, by using the latent heat produced by a substance during changes of state. This substance consists of a salt producing considerable latent heat during change of state,...	09/01/1981
4268702	Catalytic conversion of aromatic fractions in the presence of steam A process for the catalytic conversion of aromatic fractions additionally containing variable proportions of C5 to C11 non-aromatic hydrocarbons, to obtain substantially pure benzene and hydrogen, by water dealkylation of the aromati...	05/19/1981

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Assignee: Elf France