Patents Assigned to Elf Aquitaine
  • Patent number: 5725771
    Abstract: Process for the treatment of drilling muds recovered at the surface of the ground, especially synthetic muds, characterized in that it comprises at least one stage of hydrolysis of said mud by means of a lipase.
    Type: Grant
    Filed: April 15, 1996
    Date of Patent: March 10, 1998
    Assignee: Elf Aquitaine Production
    Inventors: Sophie Aliphat, Frederic Perie, Christian Zurdo, Alain Martignon
  • Patent number: 5726253
    Abstract: The process includes the reaction of a chloroformamidinium chloride with a polystyrene-divinylbenzene resin functionalized with primary amine groups. The resins which can be obtained according to this process may in particular have a spacer arm of general formula (IV):--CH.sub.2 (--X--CH.sub.2 --CH.sub.2 --(.sub.m -- (IV)with X representing oxygen or sulphur and m being equal to 1 or 2. This spacer arm bears at its end, on the right, a primary amine group or a guanidine group.
    Type: Grant
    Filed: December 11, 1996
    Date of Patent: March 10, 1998
    Assignee: Elf Aquitaine Production
    Inventors: Pierre Le Perchec, Marie Abiuso, Emmanuel Arretz
  • Patent number: 5725781
    Abstract: Sea water previously filtered and temperature controlled, and which includes added hydrogen is continuously pumped at a constant rate to a deoxygenation reactor containing a divided platinum catalyst on a granular activated carbon support. The deoxygenated sea water is continuously discharged from the reactor through a line. The divided platinum of the catalyst is present in a superficial layer of the support grains and the platinum dispersion in the catalyst grains is at least 10%.
    Type: Grant
    Filed: January 11, 1996
    Date of Patent: March 10, 1998
    Assignee: Elf Aquitaine Production
    Inventors: Jacques Bousquet, Jacques Barbier, Jean-Luc Volle
  • Patent number: 5712357
    Abstract: A process for the preparation of organic compounds or polymers containing one or more sulphur atoms and including one or more double bonds in a hydrocarbon chain is described. An acyclic sulphur-containing olefin or an unsaturated sulphur-containing cyclic hydrocarbon undergoes a self metathesis reaction or a cross metathesis reaction with a non-sulphur-containing acyclic olefin or a non-sulphur-containing unsaturated cyclic hydrocarbon to produce novel olefins, novel dienes, and/or olefinic polymers containing one or more sulphur atoms.
    Type: Grant
    Filed: April 10, 1997
    Date of Patent: January 27, 1998
    Assignee: Elf Aquitaine
    Inventors: Jean-Marie Basset, Jean-Luc Couturier, Michel Leconte, Jean Ollivier, Katsumi Tanaka
  • Patent number: 5675050
    Abstract: Crystalline microporous solids of the aluminophosphate type consisting of MeAPO-FAU and MeAPSO-FAU with Me denoting a metal which can adopt tetrahedral coordination in an oxide, for example Co and Zn. The solids are synthesized by hydrothermal crystallization of a gel containing the elements Me, Al, P or Me, Al, P and Si and a structuring agent consisting of a mixture of tetrapropylammonium and tetramethylammonium cations. These solids can be employed in adsorption and also as catalysts in the conversion of organic compounds such as hydrocarbons.
    Type: Grant
    Filed: January 30, 1995
    Date of Patent: October 7, 1997
    Assignee: Elf Aquitaine
    Inventors: Thierry Des Courieres, Joel Patarin, Jean Louis Guth, Ligia Sierra
  • Patent number: 5663928
    Abstract: A method of analysing and processing seismic reflection data for the determination of a high resolution spatial hyperbolicity correction velocity field.The method is characterised in that:for the set of normal moveout-corrected gathers, the maximum values of the positive and negative residues of the NMO correction are determined: a time range analysis is determined located on either side of a time t.sub.0 and of which the width is equal to not more than twice the absolute value of the maximum residual moveout,a family of 2n+1 residual correction hyperbolas or parabolas are constructed, each having its apex centered on said time t.sub.0 and, at the value of the maximum offset, presenting a value of time that is equal to one of the 2n+1 equidistant time values predetermined on the analysis range, and including the value t.sub.0 and the extreme values of said analysis range,2n+1 sets of static corrections are determined for each of the offsets, defined by the time differences presented relative to said time t.
    Type: Grant
    Filed: June 18, 1996
    Date of Patent: September 2, 1997
    Assignee: Elf Aquitaine Production
    Inventors: Eric De Bazelaire, Jean-Pierre Dunand
  • Patent number: 5658770
    Abstract: The invention relates to a DNA sequence of about 1.9 kb comprising at least one phage resistance mechanism, said sequence being obtained from the HindIII--HindIII DNA sequence of 3.3 kb contained in the strain Lactococcus lactis ssp lactis, deposited in the CNCM under no. I-945, by the PCR method.
    Type: Grant
    Filed: August 4, 1994
    Date of Patent: August 19, 1997
    Assignees: Sanofi, Elf Aquitaine
    Inventors: Fabien Prevots, Elisabeth Remy, Paul Ritzenthaler
  • Patent number: 5659090
    Abstract: The invention concerns steps in a process for the synthesis of at least one alkyl tertiobutyl ether, preferably respectively MTBE or ETBE, from at least one alcohol and from isobutene, each synthesized at least partially from natural gas. The alcohol, preferably methanol or ethanol respectively, is synthesized at least partially from synthesis gas, a portion of said synthesis gas being prepared in a natural gas steam prereforming zone. The isobutene is synthesized in a series of processes which includes direct transformation of natural gas to ethylene, known as oxidative coupling of methane (OCM), dimerisation of ethylene to normal butene, isomerisation of n-butene to isobutene, and the separation units associated therewith.
    Type: Grant
    Filed: October 19, 1995
    Date of Patent: August 19, 1997
    Assignees: Institut Francais Du Petrole, Elf Aquitaine Production
    Inventors: Charles Cameron, Patrick Chaumette, Quang Dang Vu, Jacques Bousquet, Jacques Tournier-Lasserve, Guy Desgrandchamps
  • Patent number: 5657821
    Abstract: A facility for an oil well, extending from the surface (12) towards an oil-bearing rock stratum (14), includes a first casing (20) placed in the well and forming a flow way towards the surface for the hydrocarbons originating from the oil-bearing rock stratum (14). According to the invention the well receives a second casing (22) forming a second flow way towards the surface for the hydrocarbons originating from the same rock stratum, the facility additionally including a chamber (51) between the casings (20,22) and the well wall (18), which does not contain any hydrocarbons originating from the rock stratum.
    Type: Grant
    Filed: July 31, 1995
    Date of Patent: August 19, 1997
    Assignee: Elf Aquitaine Production
    Inventors: Jean-Louis Beauquin, Pierre Lemetayer
  • Patent number: 5656252
    Abstract: The subject of the present invention is a process for the preparation of zeolites in which some of the silicon atoms are replaced by titanium atoms, by hydrothermal reaction of a silicon source with titanium tetrafluoride in the presence of a structuring agent.
    Type: Grant
    Filed: January 30, 1995
    Date of Patent: August 12, 1997
    Assignee: Elf Aquitaine Production
    Inventors: Alain Tuel, Remy Teissier
  • Patent number: 5645692
    Abstract: A method and apparatus for stabilizing crude oil at the outlet of a well, including at least one separation step wherein the crude oil is pressure distilled in at least one distillation column into at least two cuts, i.e., a C.sub.1-5 hydrocarbon gas cut recovered at the top of the column and a stabilized crude oil cut recovered below the point where the original crude oil was injected into the column. The method advantageously includes at least one decompression step before the separation step.
    Type: Grant
    Filed: June 26, 1995
    Date of Patent: July 8, 1997
    Assignee: Elf Aquitaine Production
    Inventors: Jean-Paul Gourlia, Jacques Tournier Lasserve, Georges Bihn-Cirlot, Jean Vandermeersch
  • Patent number: 5630906
    Abstract: A method is provided for delignifying and bleaching a lignocellulose material, wherein an aqueous solution of a redox catalyst and an oxidant is reacted with the material. The catalyst comprises an organometallic cation of the general formula [(1)Mno.sub.2 Mn(L)].sup.n+, wherein Mn is manganese (III) or (IV) oxide, the two Mn's of this cation may form a pair in a III-III, III-IV or IV-IV oxidative state, n is 2, 3 or 4, O is oxygen, and L is a ligand comprising 4 nitrogen atoms co-ordinating the manganese.
    Type: Grant
    Filed: February 23, 1995
    Date of Patent: May 20, 1997
    Assignee: Elf Aquitaine Production
    Inventors: Jean-Fran.cedilla.ois Boe, Jean-Jacques Girerd, Claude Guignard, Jean-Louis Seris, Jean-Baptiste Verlhac
  • Patent number: 5620048
    Abstract: Oil-well installation extending from the surface (14) to an oil-bearing rock stratum (16) comprising a tubing (20), arranged in the well and forming a flow channel to the surface for hydrocarbons originating from the oil-bearing rock stratum, a casing (18) delimiting the wall of the well, and a seal (24) arranged at the well bottom between the tubing (20) and the casing (18) so as to form a chamber (26) isolated from the hydrocarbons, the installation furthermore comprising, in the well, a pump (30, 48) and an electric motor (34, 46) which is intended to actuate the pump. According to the invention, the stator (40, 52) of the electric motor (34, 46) is arranged outside the tubing (20) and isolated thereby from the hydrocarbons flowing inside the tubing.
    Type: Grant
    Filed: September 29, 1995
    Date of Patent: April 15, 1997
    Assignee: Elf Aquitaine Production
    Inventor: Jean-Louis Beauquin
  • Patent number: 5618725
    Abstract: Biodegradation additive characterized in that it consists of a mixture of (i) at least one assimilable nitrogen source composed of at least one unsubstituted or substituted amino acid; (ii) at least one phosphorus source, the ratio of nitrogen to phosphorus ranging from 2 to 100, said additive being subjected to a treatment to make it oleophilic. The invention also concerns an additive in accordance with any of the foregoing claims for the biodegradation of hydrocarbons.
    Type: Grant
    Filed: May 8, 1995
    Date of Patent: April 8, 1997
    Assignee: Elf Aquitaine
    Inventors: Anne Basseres, Patrick Eyraud, Alain Ladousse
  • Patent number: 5616244
    Abstract: Cyclone separator comprising a body (10) formed by a cylindrical part (12) and a converging, substantially conical part (14), at least one inlet (22) mounted tangentially on the cylindrical part (12) and a substantially tubular element (26;62;78) mounted on the body and in hydraulic communication therewith in that the separator includes a coalescer (40;64;70) arranged around the tubular element and adapted to receive liquid to be separated prior to its entry into the cyclone.
    Type: Grant
    Filed: March 18, 1996
    Date of Patent: April 1, 1997
    Assignee: Elf Aquitaine Production
    Inventors: Jacques Seureau, Mark Hoyack
  • Patent number: 5616842
    Abstract: Device for evaluation of the lubricating characteristics of a drilling mud, including a vessel (14) provided with an entry (52) and an exit (58) for a mud to be analysed, a measuring shoe (40) mounted inside the vessel (14) and intended to be set in rotation, and at least one measuring sensor capable of measuring the stresses generated during a contact between the shoe and an internal surface of the vessel. According to the invention the sensor is mounted inside the shoe.
    Type: Grant
    Filed: July 14, 1995
    Date of Patent: April 1, 1997
    Assignee: Elf Aquitaine Production
    Inventors: Jean-Francois Armengaud, Alain Martignon, Simeon Cortiade, Jacques Marti
  • Patent number: 5614641
    Abstract: The present invention concerns a process for enantioselective catalytic hydrogenation of the ketone C.dbd.O double bond to a secondary alcohol function, said process using a neutral ruthenium complex as the catalyst and a compound containing a C.dbd.O group as the substrate to be hydrogenated, characterised in that it comprises hydrogenation of the substrate using a diallyl (diphosphino) ruthenium compound with formula ##STR1## where al preferably represents CH.sub.2 CH.dbd.CH.sub.2 or CH.sub.2 C(CH.sub.3).dbd.CH.sub.2,Q represents a hydrocarbon bridge containing at least two catenary carbon atoms and which can contain one to four catenary heteroatoms selected from O, S, N and Si,R.sup.1 to R.sup.4 may be identical or different and each represents a C.sub.1 -C.sub.18 alkyl, C.sub.5 -C.sub.7 cycloalkyl or C.sub.6 -C.sub.12 aryl group.
    Type: Grant
    Filed: March 9, 1995
    Date of Patent: March 25, 1997
    Assignee: Elf Aquitaine
    Inventors: Jean-Pierre Genet, Sylvain Juge, Jean-Alex Laffitte, Catherine Pinel, Serge Mallart
  • Patent number: 5612272
    Abstract: The invention relates to a method for producing an active composite consisting of a compressed support and an active agent. The compressed support comprises a porous support which is chemically inert and is a good thermal conductor, so as to allow complete and rapid interactions between the active agent, dispersed in the support, and a gas flow.
    Type: Grant
    Filed: March 18, 1994
    Date of Patent: March 18, 1997
    Assignee: Elf Aquitaine
    Inventors: Jacques Prosdocimi, Charles Timoney
  • Patent number: 5612294
    Abstract: Base composition for water-based drilling muds allowing the number and the amount of the other constituents of the mud to be restricted. In addition to the base solvent, fresh water, sea water or salt water, the said base composition comprises scleroglucan as viscosity agent, the mycelium which produced it and bentonite or an equivalent in limited amount.
    Type: Grant
    Filed: January 17, 1995
    Date of Patent: March 18, 1997
    Assignee: Elf Aquitaine
    Inventors: Alain Vaussard, Alain Ladret, Alain Donche
  • Patent number: 5607657
    Abstract: A process is disclosed for the removal of sulphur compounds from a residual gas so as to obtain a purified gas stream substantially free of sulphur compounds, which process comprises subjecting the residual gas to a combined hydrogenation and hydrolysis, cooling the gas to a temperature whereby water vapor in the gas is not condensed, mixing the gaseous effluent with a gas containing free oxygen, contacting the cooled gaseous effluent and the gas containing free oxygen with a catalyst for selective oxidation of H.sub.2 S to sulphur, and depositing substantially all of the sulphur formed on the catalyst.
    Type: Grant
    Filed: February 14, 1995
    Date of Patent: March 4, 1997
    Assignee: Elf Aquitaine Production
    Inventors: Andre Philippe, Jean Nougayrede, Georges Kvasnikoff