Abstract: New organic compounds containing a phosphorus heterocycle of the phosphonite type, in which the phosphorus atom is connected on the one hand to an oxygen atom and on the other hand to an oxygen, sulphur or nitrogen atom, characterized by comprising two of such heterocycles, the two phosphorus atoms being connected by a hydrocarbon group. Preparation of these diphosphonites by the action of a tetrahalogeno- or tetraminodiphosphine upon a diol or an alcohol carrying a phenol, thiol, enol, acid or amine function.

Abstract: The disclosure describes a method for the preparation of metallic alloys containing an alkali or alkali-earth metal, such as lithium, and a host metal, such as aluminum. Initially, an active organic solution of the alkali or the alkali-earth metal is prepared, and a source of the alkali or alkali-earth metal which are both brought together with one another. On the other hand, a metallic structure containing the host metal is prepared, the metallic structure is brought together with the organic solution which is kept in touch with the source of metal until there is formed an alloy of the host metal and of the alkali or alkali-earth metal with the metallic structure, and the alloy possesses an activity which is determined by that of the organic solution. The organic solution then acts as transfer agent of the alkali or alkali-earth metal towards the host metallic structure. To prepare a negative electrode, the alloy is brought together with an electrolyte, such as a thin polymeric film.

Abstract: Method for the processing of recordings of signals resulting from a seismic exploration of a medium.It consists, after grouping recordings in pairs and crosscorrelation of the recordings of each pair, in grouping the elementary crosscorrelation functions thus obtained in at least one family in which the measuring spaces are included in a same predetermined reference space, in transforming the time variables of the said functions in order to bring the measuring space dimension to that of the reference, then in adding the transformed functions.Application in particular to acoustic logging seismic reflection or refraction.

Abstract: A method and device for making geophysical measurements in a wellbore comprising a measuring string of a plurality of measuring tools displaced along a borehole wall connected to a surface control unit by a traction system including a cable, guide pulley, connection head and junction box. The measuring tools are displaced at a relative velocity which is equal and opposite to the absolute velocity of the traction system in order to reduce the absolute velocity of the measuring tools to zero during measurement periods. The relative velocity of the tools is in the same direction as the absolute velocity of the traction system between measurement periods, with the result that the absolute velocity of the measuring tools during these periods is higher than the absolute velocity of the traction system.

Abstract: A thermochemical heat pump for the transfer of calories between two calorie sources (1, 4) and (2, 5). The heat pump embodies a monovariant system for which the relationship between the logarithm of the pressure and 1/T is singular and quasi-linear. Application to heating.

Abstract: Electrochemical generator, the electrolyte of which is made of a macromolecular material comprising a salt in solution and of which the positive electrode is a composite electrode which comprises as active material a metallic compound adapted to be reduced by the cation of the salt in solution by generating during this reduction new species which can include the zero oxidation degree metal, said generator being able to operate reversibly at ambient temperature.

Abstract: The invention has for an object a high-yield process for production of methane by anaerobic fermentation.The process of the invention is characterized by the fact that from 0.001 to 0.35 millimoles per liter of an unsaturated fatty acid or of a derivative of this acid is added to the fermentation medium, employed under conventional fermentation conditions.

Abstract: A process and apparatus for measuring the permeability of solid samples involves applying a constant differential pressure between the end faces of a sample disposed in a measuring cell, introducing a pressurized gas into the sample for a specified time, measuring the fluid flow rate, and then calculating the permeability of the sample by applying Darcy's law.

Abstract: A measuring tool for producing geophysical measurements within a borehole comprises a crawler belt, at least a portion of which constitutes a support for a transducer. The crawler belt is continuously displaced within the bore hole by means of a suspension cable and guide pulley in cooperating relation with spiked shoes and retaining plates for maintaining at least the transducer-supporting portion of the crawler belt in a stationary position with respect to the borehole wall during each measurement stage.

Abstract: The process consists in successively separating increasingly heavy petroleum cuts at the head of a plurality of columns CO1, CO2, CO3 and Cl0 of a first series of columns which feed individually each column of the second series. The column CO7 is a gasoline stabilizing column which feeds an installation for fractionating light petroleum gases. The column CO4 is a gasoline fractionating column. The columns CO5 and CO6 are columns for separating petroleum naphthas from kerosine. The atmospheric residue collected at the bottom of the column Cl0 is processed in the vacuum distillation column Cl2 and the residue from this column is processed in the second vacuum distillation column Cl3 after reheating in a furnace.By carrying out a succession of progressive separations performed in a series of columns of small volume, more efficient utilization of the recovery heat is achieved.

Abstract: In a process for the production of methyl mercaptan by heating a gas comprising carbon monoxide and/or carbon dioxide, hydrogen sulphide and hydrogen in contact with a catalyst based upon a heavy metal sulphide, with recycling of the gas fraction which has not reacted, the gas to be recycled has removed from it water which it contains following the reaction in contact with the catalyst.

Abstract: Improved process of metathesis of olefins by contact of one or more olefins with a catalyst comprising a tungsten complex with two phenoxy groups, carrying substituents and four other ligands, the complex carrying as coordination groups a halogen atom, an alkyl radical and a carbene. The catalyst preferably is of the formula ##STR1## where X is halogen, R is hydrocarbon or an electronegative group or atom, R.sup.1 is alkyl and R.sup.2 and R.sup.3 are individually hydrogen or alkyl groups.

Abstract: The disclosure describes an anode made of a thin metallic foil in discharged condition which is converted into a dense metallic alloy of an alkali metal during the first charge. The disclosure also describes an electrochemical rechargeable battery in discharged condition. The latter comprises an anode made of a thin metallic foil, such as aluminum, magnesium or tin, an electrolyte, for example a polymeric electrolyte, as well as a cathode based on an oxide, a sulfide or an halide, prepared in discharged condition and constituting a source of alkali metal preferably lithium. The cathode should be capable of freeing the alkali metal under a charge so that the latter is introduced into the metallic foil to form an alloy of the alkali metal and of at least a portion of the metal constituting the metallic sheet. To obtain the charged battery, it is merely sufficient to apply a charge during a certain period of time while the anode is being transformed into an alloy.

Abstract: A circular guide table is provided for a marine production riser comprising an opening for the central tube having a ball joint allowing angular movement of the tube in any direction with respect to the table and two radial arms offset from each other by an angle close to 90.degree. fixed to the table and whose ends each support a sliding device, such as a roller carriage capable of sliding along vertical rails fixed to the platform. The table is formed from an inner collar in the form of a hub to which are fixed spokes between which the peripheral production stringers pass, the opposite ends of the spokes being joined together by an external collar provided with radial arms.

Abstract: Improved sealing system between an enclosure of brittle material and a metal apparatus for carrying out chemical reactions, in which a connection member (6) is mounted over the open end (2') of the enclosure (2), with the interposition of a toroidal seal (9) between the opening into the enclosure and the underside of the connection member; a supplementary toroidal seal (11) is inserted between the lateral exterior wall of the enclosure (2,2') and the bore of the connection member (6).

Abstract: A device is provided for positioning, activating and connecting the modules of a sub-sea oil production station. It comprises a frame 1 on which is mounted a central orientatable mast 20 having at its end a means 26 for connecting with a stringer train 28 and comprising a telescopic articulated gib 30 having a connector 32 at its end, said frame comprising underneath a connector 5 capable of locking a fixed mandrel 54 or that of a module to be positioned and comprising guide means 2 for lowering the device and means 3 for positioning it with respect to the module to be positioned, a multiconnector 6 for the electro-hydraulic connection with a multiconnector receptacle 54 carried by the module 70, electric and hydraulic umbilical ducts and cables 40 for the control and energy transmission to the multiconnector 6 and to the connector 32 and display means 33, 36.

Abstract: The device comprises a head 1 containing a cavity 2 and a sleeve 4, and a hollow body 3, inside which is lockingly housed a hollow mandril 6 fixed to a load to be carried and comprising a valving piston 17. Inside sleeve 4 is housed a mobile piston 31 whose head 32 slides in cavity 2. Pipes 27, 28, 29 pass through the cavity 2, whereas, opposite these pipes, housings 320 are formed in the piston 31 for allowing the piston to slide along the pipes. These housings are extended by ducts 33, 34, 35 opening laterally into the face of the piston 31 through orifices 36, 37. Inside mandril 6 are provided longitudinal high pressure fluid ducts 39, 40 for connection to the user circuits. The lateral face of the valving piston 17 comprises annular seals 44, 45, 46 intended to close off, in the raised position of piston 31, the annular zones corresponding to the orifices through which ducts 39, 40 open out and which communicate in the low position of 31 with the orifices 36, 37.

Abstract: Improved catalyst for the metathesis of olefins comprising a compound of W with a halogen and with a phenoxy group which can carry substituents. It contains 4 halogen atoms and 2 phenoxy groups per atom of W. Preferably, the phenoxy group is halogenated. This catalyst allows the more rapid carrying out of various types of metathesis reactions, when it is used as a co-catalyst in conjunction with organo-metallic compounds, particularly Al or Sn. Amongst others, it allows the economical preparation of pheromones. It is practically insensitive to traces of water and oxygen.

Abstract: In a method and device for the study of surface layers and subjacent layers of interest, the device comprises receivers and at least two transmission sources spaced at a distance such that a set of traces produced by one of the transmission sources does not interfere with a set of traces produced by the other transmission source when the two sets of traces are on the same time-section.

Abstract: An intermediary chamber associated to a device for feeding a pulsatory combustion chamber with fuel and comburent includes a heat tube l65 defining with the inner channel wall 125 a recirculation zone for the burnt gases issuing from the combustion chamber. The intermediary channel located between the combustion chamber for pulsatory combustion of a mixture of fuel and a combustive agent and an injection chamber includes the heat tube being directly communicated with the combustion chamber, wherein an internal wall of the intermediary channel and an outer surface of the heat tube define a recirculation zone for the recirculaton of burn gases issuing from the combustion chamber, the recirculation zone being at least partially open at an upper end thereof.