Abstract: The invention relates to a process for producing a diagram of an installation using apparatuses, each apparatus being supplied with gas, comprising: the consultation of one or more databases (5) comprising, for each apparatus, data on the flow rate, the nature, the purity of the gas supplying the apparatus, and the supply pressure of that gas for that apparatus, the selection, for each apparatus, of a value, or of a limit value, of duration or of frequency of use, the calculation, for each apparatus, of the consumption, or of the limit consumption, according to the utilisation value and to the flow rate data, the calculation, for each gas and for each gas purity, of the total of the consumptions of all of the apparatuses, the indication of technical constraints, the consultation of a database (5) for proposing, for each gas and each gas purity, a packaging, as a function of the consumption and of the technical constraints relating to the storage of the gas and/or to their delivery.

Abstract: A gas generator for air bags having a container holding a combustible gas mixture and fitted with a closure which opens into a combustion chamber fitted with a gas outlet in which the gas mixture is ignited by an ignition device. To provide a fast-reacting ignition device and generate a controllable flow of pressurized gas at a relatively low temperature, the container is mainly filled with a pressurized inert gas and contains 0.1 to 2.0% vol. of a hydrocarbon and 0.5 to 10% vol. of a gaseous oxidizing agent. On being actuated, the ignition device opens the container closure, ignites the gas mixture flowing into the combustion chamber and maintains combustion by the continuous supply of energy.

Abstract: A process for treatment of a secondary gas including ozone, comprising the steps of:a) adding an adjacent gas including CO.sub.2 to the secondary gas to form a mixture of secondary gas and adjacent gas;b) passing the mixture of secondary gas and of adjacent gas obtained at the end of stage a) into at least one stock of adsorbent, where the ozone is completely or partly adsorbed;c) sweeping the stock of adsorbent with the aid of a desorbing gas including CO.sub.2, and discharging from an outlet of the stock an output gas including ozone, wherein the ozone has a concentration which is higher in the output gas than the ozone concentration of the secondary gas.

Abstract: The invention relates to a process for producing disilane from monosilane, according to which gaseous monosilane is passed into a reaction zone where it is subject to an electric discharge generated by a high-frequency current.

Abstract: The invention relates to a process for the separation of a gaseous hydride or a mixture of gaseous hydrides from a gaseous medium containing at least one gas from the group consisting of H.sub.2, Ar, He, according to which the gaseous medium is passed on to a membrane module so that the concentration of the hydride or of the mixture of hydrides obtained at the outlet of the module is higher than their initial concentration in the gaseous medium.

Abstract: A process for producing disilane from monosilane comprising introducing monosilane into a reaction zone in which the monosilane is subjected to an electric discharge generated by a high frequency current. The monosilane is mixed with at least one inert gas selected from the group consisting of helium and argon. The pressure of the gaseous mixture in the reaction zone is between 0.1 and 3 bar, and the gaseous mixture is contacted in the reaction zone under electric discharge with a wall cooled to a temperature which is sufficiently low for the saturation vapor pressure of the disilane to be negligible, but not low enough for the monosilane to condense at the working partial pressure. Apparatus for conducting this process is provided.

Abstract: The microwave torch comprises at least one gas supply conduit (1, 2); a resonant cavity (3) forming around the conduit a sleeve open adjacent to the outlet of the conduit and including a lateral opening (4); a transition coaxial structure perpendicular to the sleeve comprising, on one hand, an outer tube (5) connected to the lateral opening (4) of the sleeve and, on the other hand, an inner element (6) having one end (20) in contact with the conduit and an opposite end which is in contact with the outer surface of a wave guide (8) and carries a transition member (7) disposed in the wave guide; said wave guide supplying microwave energy and having a rectangular section and perpendicular to the coaxial structure (5, 6) being provided with an opening (27) where the outer tube (5) of the coaxial structure is connected; shielding gas supply means in the wave guide and/or the coaxial structure and/or the sleeve; optionally tuning means; and optionally plasma igniting means.