Abstract: The invention relates to a process for preparing jet fuel or jet fuel precursors which comprises the treatment of a charge derived from biomass, the said charge comprising at least one compound chosen from terpenes of formula [CH2?C(CH3)CH?CH2]n, in which n is an integer of from 2 to 12, the carbon chain of which is linear, cyclic or branched, or cyclic or branched terpenes as defined previously, which have been chemically modified by oxidation and/or rearrangement of the carbon backbone, the said process comprising a cycloaddition step (i) followed by a cracking and hydrogenation step (ii).

Abstract: A subsea wellhead assembly comprising a casing housing and a casing extending down inside the well, and a tubing hanger. The tubing hanger comprises first and second valves, each valve being a fail safe valve.

Abstract: A total hip arthroplasty includes a femoral prosthesis and an acetabular prosthesis. The femoral prosthesis has a ball on a neck portion of a femoral component including a noncircular femoral body a portion coated with a porous bone ingrowth coating for noncemented fixation within a resected patient femur. The femoral body is tapered, to include a combination of a medial-lateral taper, an anterior-posterior taper, and a lateral-to-medial taper for secure seated fixation into the medullary canal of a resected femur. The acetabular prosthesis includes a hemispherical metal cup having a porous bone ingrowth surface for secure fixation within a prepared patient acetabular socket. A bearing insert is initially seated within the acetabular cup in a “trial” position without locking to determine cup placement and freedom of leg movement, and thereafter reseated in a “lock” position. A femoral broach and a bone punch tool are also provided.

Abstract: The invention concerns a method for surveying a subsurface formation containing hydrocarbons, comprising: injecting at least one tracer compound into the subsurface formation; recovering a fluid derived from the subsurface formation; detecting the tracer compound in the fluid by liquid chromatography analysis coupled with tandem mass spectrometry analysis, the liquid chromatography analysis being conducted with a stationary phase composed of particles having a mean size equal to or less than 2.1 ?m.

Abstract: This invention is for a method for transforming a seismic trace into a compressed domain. The seismic source wavelet is transformed into a zero degree phase wavelet and a shifted 90 degree phase wavelet, and the two wavelets span a 2-dimensional sub-space. A dictionary is created by collecting the wavelets in the sub-space. In practice this dictionary is usually combined with conventional existing wavelet dictionaries. The seismic trace is projected onto the dictionary (sub-space alone or combined) to find the best matching projection, with a residual determined after each projection, wherein the sum of the residuals determines the fidelity of the data compression.

Abstract: A catalyst can include a phosphorus modified zeolite having partly an ALPO structure. The ALPO structure can be determined by a signal between 35-45 ppm in 27Al MAS NMR spectrum. The zeolite can include at least one ten member ring in the structure thereof. The catalyst can also include a binder and one or more metal oxides. The catalyst can be used in processes in the presence of steam at high temperatures, such as temperatures that are above 300° C. and up to 800° C. The catalyst can be used in alcohol dehydration, olefin cracking, MTO processes, and alkylation of aromatic compounds with olefins and/or alcohols.

Abstract: The present invention relates to a method for feeding metallocene catalyst slurry to an olefin polymerization loop reactor (1) using a positive displacement device (5) positive displacement device comprising a first chamber and a second chamber, each chamber having an inlet and an outlet and each chamber comprising an ball arranged between the walls of said chamber, wherein said chambers are connected to each other by a pump chamber operably connected to a pump, wherein, the difference between the diameter of said ball and the diameter of said chamber is comprised between 5 to 200 times the average particle size (d50) of said catalyst.

Abstract: The present invention is a process for removing oxygenated contaminants and water from an hydrocarbon stream comprising: introducing the contaminated hydrocarbon stream in a gaseous phase in an absorption zone, contacting said hydrocarbon stream in said absorption zone at a pressure of at least 5 bars, advantageously in the range 5 to 40 bars with an alcohol capable to absorb water and oxygenated contaminants at conditions effective to produce an overhead hydrocarbon stream having a reduced oxygenated contaminants and water content and an absorbent bottoms stream comprising the alcohol, hydrocarbons and having an enhanced oxygenated contaminants and water content, sending the overhead of the absorption zone to a wash column (referred to as the high pressure water wash column) at a pressure of at least 5 bars, advantageously in the range 5 to 40 bars, essentially washed with water at conditions effective to produce an overhead hydrocarbon stream having a reduced oxygenated contaminants and an aqueous bott

Abstract: A method of regenerating an enzymatic catalyst arranged in a reactor includes a mineral support based on metal oxide and at least one enzyme, wherein it contains at least one step of detachment of the spent enzymes by solvation by scavenging of the catalyst using at least one ionic surfactant, and at least one step of re-attachment of active enzymes by scavenging of the purified support with at least one solution of active enzymes, the two steps being performed in situ within the reactor.

Abstract: The present disclosure relates to a biodegradable lubricant composition, notably intended to be incorporated as an oil phase with high lubricating power in a drilling fluid or mud. This composition may be in a drilling fluid or as a fluid for fracture of underground formations. These muds or fluids contained in the composition of the present disclosure are particularly suitable for very deep drillings, offshore in deep water and/or sidetracked drillings or with a long shift.

Abstract: A distributor tray (1) for a gas and a liquid circulating as a co-current, said tray comprising a plate (10) perforated by orifices (12) and supporting hollow chimneys (20) extending perpendicularly to said plate (10), each orifice (12) of the plate being surmounted by a chimney (20) of identical cross section to said orifice (12), characterized in that the plate (10) is equipped with a plurality of openings (30) arranged on the periphery of each chimney (20) inside a circumscribed circle, the centre of which coincides with the centre of the chimney (20), and the radius of which is less than or equal to 1/3 of the shortest distance separating two adjacent chimneys (20), and in that a single deflector element (40, 100) is arranged beneath each chimney (20), the openings (30) and the deflector element (40,100) associated with each of the chimneys (20) being so arranged as to impart a rotating movement to the gas/liquid mixture under each chimney.

Abstract: A breathing air production and filtration system has an air generation assembly and a distribution assembly. The generation assembly has a compressor and filtration components to generate breathing air. The distribution assembly has collection pots with multiple connections for manifolds. For their part, the manifolds have multiple connectors for the respirators of end users. The system uses a monitoring control system with various wireless sensors to monitor operation of the system and the quality of breathing air produced. These sensors include an in-line sensor detecting constituents or contaminants in the breathing air. The sensors also include pressure, temperature, and flow sensors monitoring the operation of the system. An automatic switchover is provided for switching the system to a back-up supply of high-pressure reserve air if needed.

Abstract: An electrochemical cell includes a negative electrode comprising a first active metal, a positive electrode comprising a second active metal, and an electrolyte comprising salts of the two active metals, a salt of the cathodic metal and a salt of the anodic metal. In operation, the electrolyte composition varies such that in a charging mode the salt of the anodic salt decreases, while the salt of the cathodic salt increases, and in a discharging mode the salt of the anodic salt increases, while the salt of the cathodic salt decreases. The cell is operational for both storing electrical energy and as a source of electrical energy as part of an uninterruptible power system. The cell is particularly suited to store electrical energy produced by an intermittent renewable energy source.

Abstract: An isolating valve includes a body having a canal for the passage of fluid, which is intended to be shut off by upstream and downstream spherical plugs, that can be actuated independently of one another between positions allowing the passage of fluid through the canal and positions of shutting off the canal, and a sealing checker, opening into the canal and between the two spherical plugs. The upstream plug is equipped with an upstream seat of the “simple piston effect” type and has no downstream seat. The downstream plug is equipped with an upstream seat of the “simple piston effect” type and with a downstream seat of the “double piston effect” type.

Abstract: An exercise device includes a vertical support member; an adjustable incline having a first end and a second end, the first end of the adjustable incline vertically movable with respect to the vertical support member for setting the incline of the adjustable incline, the adjustable incline including a top rail and a bottom rail pivotally coupled to each other at a first location; a strut with a first end and a second end, the first end of the strut being pivotally coupled to the vertical support member and the second end of the strut being pivotally coupled to the adjustable incline at a second location that is not the same as the first location; a user support platform movably attached to the adjustable incline; pulleys and one or more cables coupled to the adjustable incline and user support platform for movement of the support platform along the adjustable incline.

Abstract: The invention relates to a method and a system for controlling the production of a mixture of constituents, especially a mixture with premix dead volumes. By correcting the matrices for calculating the mixture constituents, used in calculating recipes, by introducing limit, order relationship and equality constraints, it is possible to avoid the drifts observed in certain special cases by the implementation of the method and to improve, on the one hand, the diagnostic assistance and the control of the estimation of the properties so as to limit the deviations from the actual quality of the constituents of the mixture and, on the other hand, the speed of manufacture of the mixture and the robustness of the method. The method and the system according to the invention ensure multivariable regulation feedback by a dynamic observer providing an estimate in real time of the properties of the constituents of the mixture, said estimate being sufficient to guarantee the effectiveness of the feedback loop.

Abstract: The invention relates to a catalyst metering device with a valve formed of an iron-based alloy steel hardened to a Rockwell hardness C of at least 60. The device can be used for metering of a catalyst for an ethylene polymerization reaction. The invention further relates to ethylene polymerization wherein the catalyst is metered in a catalyst metering device with a iron-based alloy steel hardened valve, as well as to a ethylene polymerization reactor comprising such a catalyst metering device.

Abstract: The invention relates to a method and a device for controlling the production of a mixture of components, especially a mixture with premix dead volumes. The method and the device according to the invention ensure multivariable regulation feedback by a dynamic observer providing an estimate in real time of the properties of the components of the mixture, said estimate being sufficient to guarantee the effectiveness of the feedback loop. Thus, the desired properties of the mixture are guaranteed despite large uncertainties in the properties of the components on the one hand, and partial knowledge of the mixing process on the other.

Abstract: The invention relates to a process for preparing polyolefin in a loop reactor. The polymer is prepared by polymerizing olefin monomers in the presence of a catalyst to produce a polyolefin slurry while pumping said slurry through said loop reactor by means of a pump. The present process is characterized in that the catalyst is fed in the loop reactor at a distance to the pump. The invention allows production of the polymer with advantageous properties while leading to fewer blockages of the reactor.

Abstract: This invention discloses three-layer rotomoulded motorboats having excellent floatability prepared from foamed polyethylene.