Abstract: The invention relates to a ternary gaseous mixture formed from argon, helium and oxygen, characterized in that it is formed from between 19.5 and 20.5% of helium, between 2.7 and 3.3% of Oi, and argon for the remainder (volume %), and to the use thereof as gaseous protection in a method of electric arc welding of at least one steel part to carbon, using a fusible filler wire. Preferably, the welded parts overlap or cover each other and the rotary arc welding takes place where the parts overlap.

Abstract: A method of providing an inerting atmosphere to the surface of molten aluminum in a vortex charge well of a reverberatory melting furnace is provided. The purpose is to improve aluminum recovery (reduce aluminum oxidation melt loss) by displacing the ambient atmosphere above the molten vortex with an inert gas. The method includes introducing a flow of an inerting gas into an inerting region immediately above the surface of the vortex charge well. The inerting gas may be selected from the group consisting of nitrogen, argon, or a mixture thereof. The inerting gas may be introduced into the charge inlet chute, through a diffuser, or a ring manifold. The vortex charge well may include a lid.

Abstract: Process for depositing a coating on a substrate having at least one cavity, comprising a step of mixing ground powders of an activating agent and a powder of the metal or of the alloy to be deposited on the substrate that were ground in step a) and a liquid so as to form a suspension, and a step of applying the suspension to the portion of the substrate to be coated.

Abstract: Cryogenic refrigeration device comprising a working circuit intended to cool a working fluid circulating in the said circuit, the working circuit comprising, arranged in series in a loop: a compression portion, a cooling portion, a portion with valve(s), an expansion portion and a reheating portion, in order to subject the working fluid to a recuperative working cycle comprising compression, then cooling, then expansion and then reheating to prepare for a new cycle, wherein the compression portion comprises at least one compressor having a linear piston driven by a linear motor, the expansion proportion comprises at least one expander with a linear piston, the portion with valve(s) comprises at least one regulating valve linearly actuated by a linear motor and controlled in order to supply or extract the working fluid from the at least one expansion piston.

Abstract: A process for producing olefins from oxygenates can include the following steps: (i) heterogeneously catalyzed conversion of at least one oxygenate to a product stream containing C2 olefins, C3 olefins, C4 olefins, C5/6 hydrocarbon compounds, and C7+ hydrocarbon compounds; and (ii) separation of a propylene stream consisting of C3 olefins for at least 95 wt-%, wherein at least 10 wt-% of the propylene stream are recirculated into process step (i).

Abstract: Method of deposition on a substrate of a dielectric film by introducing into a reaction chamber a vapor of a precursor selected from the group consisting of Zr(MeCp)(NMe2)3, Zr(EtCp)(NMe2)3, ZrCp(NMe2)3, Zr(MeCp)(NEtMe)3, Zr(EtCp)(NEtMe)3, ZrCp(NEtMe)3, Zr(MeCp)(NEt2)3, Zr(EtCp)(NEt2)3, ZrCp(NEt2)3, Zr(iPr2Cp)(NMe2)3, Zr(tBu2Cp)(NMe2)3, Hf(MeCp)(NMe2)3, Hf(EtCp)(NMe2)3, HfCp(NMe2)3, Hf(MeCp)(NEtMe)3, Hf(EtCp)(NEtMe)3, HfCp(NEtMe)3, Hf(MeCp)(NEt2)3, Hf(EtCp)(NEt2)3, HfCp(NEt2)3, Hf(iPr2Cp)(NMe2)3, Hf(tBu2Cp)(NMe2)3, and mixtures thereof; and depositing the dielectric film on the substrate.

Abstract: The invention concerns a pressurized fluid cylinder equipped with a valve accommodating a first draw-off circuit, the valve comprising a member for regulating the flow and/or the pressure of the fluid drawn off via a member for manually controlling the regulating member, the valve comprising an electronic device for displaying data concerning the amount of fluid contained in a cylinder which is connected to the valve, the electronic display device comprising a member for acquiring, storing, and processing data, and at least one data display connected to the data acquisition, storage and processing member.

Abstract: Support element and method for a cryogenic fluid circuit comprising a plurality of orifices intended for the passage of cryogenic-fluid transfer pipes, said support element comprising at least one thermal path formed between two adjacent orifices, the thermal path comprising a blind opening, the opening being delimited by two spaced-apart walls extending between two ends in a longitudinal direction perpendicular to the plane of the orifices, the two walls being joined together by an end wall, the support element being characterized in that it comprises a first set of orifices which is surrounded by a first thermal path and a second set of orifices, the first thermal path being situated between the first set of orifices and the second set of orifices, which means to say that the first thermal path is in thermal and mechanical connection with, on the one hand, all the orifices of the first set of orifices and, on the other hand, all the orifices of the second set of orifice.

Abstract: Combustion method and installation in which an oxygen-rich oxidant is preheated by exchange of heat with a heat-transfer fluid, upstream of the combustion chamber, in which method and installation an auxiliary gas is heated by heat exchange with a first proportion of the hot flue gases discharged from the chamber, and in which method and installation the heat-transfer fluid comprises a mixture of at least a proportion of the heated auxiliary gas with a proportion of hot flue gases.

Abstract: Method for separating air by cryogenic distillation in an air separation device comprising a system of columns, a first turbine and a second turbine, wherein, in de-icing operation, a common duct bringing air from the two turbines to a column is closed by means of an isolation valve, a purge gas is sent to the turbines at a temperature above 0° C. in order to de-ice them, but purge gas is not sent to the system of columns.

Abstract: A process and a plant for producing olefins from oxygenates such as methanol and/or dimethyl ether are proposed, in which initially the oxygenates are converted to a primary product containing propylene, other olefins, paraffins and aromatics in an olefin synthesis reactor. The primary product is separated into hydrocarbon fractions of different C chain length, wherein short-chain olefins such as propylene are obtained and beside further fractions there is also obtained a C7? fraction which contains C5/C6 olefins, as well as a C7+ fraction which contains aromatics. From the latter, the aromatics are separated and alkylated with the C5/C6 olefins to obtain alkyl aromatics. The same are hydrogenated completely and recirculated to the olefin synthesis reactor, where they likewise are converted to short-chain olefins.

Abstract: The present invention relates to a process and device for condensing a first fluid rich in carbon dioxide using a second fluid.

Abstract: Method for separating air by cryogenic distillation, wherein air is compressed in a compressor and is subsequently sent to a heat exchanger, with the air cooled in the exchanger being sent to a check valve downstream of the heat exchanger and subsequently to a turbine, the valve being positioned so that air from a short-circuiting duct cannot return to the exchanger from the compressor.

Abstract: Method for separating air by cryogenic distillation, wherein at least part of the air to be distilled is boosted in an air booster, compressed air is allowed to expand in at least one expansion turbine and, if the pressure drop between two points of the booster passes under a threshold and/or a flow of the booster passes under a minimum flow of the booster, part of the air boosted in the booster is allowed to expand without having been cooled between the booster and the expansion turbine and the boosted expanded air is sent upstream or downstream of the at least one turbine, without having been cooled in the heat exchanger, after having been boosted.

Abstract: The invention relates to a flowmeter for liquid/gas two-phase cryogenic fluids, including: a separator of the liquid/gas phases, preferably made up of a vessel, the cryogenic fluid being admitted into the top portion of said vessel; a liquid flow sensor, located on a liquid pipe in fluid communication with the bottom portion of the vessel, the vessel being placed in the top position in the space relative to the liquid flow sensor; a gas pipe, in fluid communication with the upper portion of the vessel, provided with a flow sensor of the gas phase circulating in said gas pipe; a three-way valve capable of recovering, in two of the channels thereof (A/B), the downstream end of said gas pipe and the downstream end of said liquid pipe; and a device for measuring the level of liquid in the vessel, preferably comprising two level sensors: a bottom level sensor and a top level sensor.

Abstract: A method for generating electricity by means of a nuclear power plant and a liquid vaporization apparatus involves, during a first period, producing heat energy by means of the nuclear power plant and using the heat energy to vaporize water or to heat water vapor, expanding the water vapor formed in a first turbine and using the first turbine to drive an electricity generator in order to produce electricity, vaporizing liquefied gas coming from a cryogenic store in order to produce pressurized gas, reheating the pressurized gas with a part of the water vapor intended for the first turbine of the nuclear power plant and expanding the pressurized fluid in a second turbine to produce electricity and, during the second period, liquefying the gas to be vaporized.

Abstract: A device for transferring fluid between two separate structures includes a rigid pipe with a double shell extending along a longitudinal axis. The pipe includes an outer-shell housing (in the inner vacuum space thereof), at least one inner duct for fluid transfer, and at first and second ends thereof, includes respective first and second rigid connections of the outer shell to the first structure and second structures, respectively. The first and second ends of the outer shell are rigidly connected to the at least one inner duct. The pipe comprises a system to compensate for movements in the longitudinal direction.

Abstract: Process for heating via oxy-fuel combustion in which a stream of air is heated by means of at least one portion of the residual heat present in the fuel gases discharged from the combustion chamber, at least one portion of said hot air stream is introduced into an oxygen production unit in which a portion of the oxygen present in the hot air stream is extracted by means of one or more ITM, with a first stream of oxygen at high temperature being obtained, said first stream of oxygen is mixed with a second stream of oxygen so as to obtain a total stream of oxygen at a lower temperature than that of the first stream of oxygen, at least one portion of the total stream of oxygen being transported to the combustion chamber and used within as oxygen-rich oxidizer.

Abstract: Embodiments of the invention relate to an exchanger element having a solid plate and ribs on the plate in order to form exchange channels configured to heat or cool fluid, and distribution channels that extend transversely to the exchange channels.

Abstract: The invention relates to a method and facility for manufacturing a fiberglass material, in which melted glass is produced in a melting furnace heated via combustion of a fuel with an oxygen-rich oxidant. The fumes generated are used to preheat a combustion reagent in two steps: a first step in which air is heated via heat exchange with the fumes, and a second step in which the combustion reagent is preheated via heat exchange with the hot air. The air is then used in the method for converting the melted glass into a fiberglass material.