Abstract: The present invention generally relates to processes and apparatuses for the integration of a blast furnace and an air separation plant to increase blast furnace production. The present invention recovers energy from the air separation through the expansion of a product stream.

Abstract: In an apparatus for the separation of air by cryogenic distillation, the overhead gas of a mixing column is sent to the passages for warming a bottom reboiler of the low-pressure column of a double column fed with air to be distilled. The production of oxygen in the bottom of the low-pressure column is increased.

Abstract: The invention concerns the use of compounds of formula (I) in which R represents a linear or branched, substituted or not substituted, saturated or unsaturated C1-C12 hydrocarbon chain, for stimulating the proliferation of epidermic cells and fibroblasts.

Abstract: In an integrated power generation system, part of the air from a gas turbine compressor is separated in a single nitrogen wash column to remove oxygen and the gaseous nitrogen produced at the top of the column is sent back to a point upstream of the expander of the gas turbine. The wash column may be fed with liquid nitrogen from an independent air separation unit in which air is separated. Liquid from the bottom of the wash column may be fed back to the air separation unit. In order to boost production of an air separation plant, an additional plant is linked with the original plant. For example, air may be separated in a single nitrogen wash column to remove oxygen and gaseous nitrogen is produced at the top of the column. The wash column is fed with liquid nitrogen from the high pressure column of the air separation unit. Liquid from the bottom of the wash column may be fed back to the air separation unit.

Abstract: In an apparatus for the separation of air by cryogenic distillation, the overhead gas of a mixing column is sent to the passages for warming a bottom reboiler of the low-pressure column of a double column fed with air to be distilled.

Abstract: In an integrated power generation system, part of the air from a gas turbine compressor is separated in a single nitrogen wash column to remove oxygen and the gaseous nitrogen produced at the top of the column is sent back to a point upstream of the expander of the gas turbine. The wash column may be fed with liquid nitrogen from an independent air separation unit in which air is separated. Liquid from the bottom of the wash column may be fed back to the air separation unit.

Abstract: The present invention relates to processes and installations for the production of oxygen and nitrogen by cryogenic distillation. The cost of oxygen and nitrogen production is reduced by providing an improved high pressure process.

Abstract: A process for operating a permeable membrane generator at above or below design conditions therefor, which entails adjusting the permeation temperature of a feed stream permeating said membrane generator by heating or cooling means, thereby providing a desired amount, purity and pressure of a product gas.

Abstract: A cosmetic or pharmaceutical composition including, as the active ingredient, a compound of general formula (I), wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6, R.sub.7 and R.sub.8 are selected from --H, --OH, --OCH.sub.3 and a glucosyl radical, or a pharmaceutically acceptable salt thereof.

Abstract: A device for separation of gas by adsorption, of the so-called VSA or MPSA type, comprises, between a utilization line (L) and a source (S) of gaseous mixture to be separated, at least one module (M) comprising in series a reversible rotary machine (R), typically a Roots machine, an adsorber (A) and a shut-off valve (V), the rotary machine (R) being alternately actuated, in one direction during a first phase of pressurization and of production and then, in the other direction, during a second phase of depressurization and desorption. Used particularly in the production of small and medium volumes of oxygen in modular installations.

Abstract: A device for the separation of gas by adsorption, of the so-called VSA or MPSA type, comprises, between a utilization line (L) and a source (S) of gaseous mixture to be separated, at least one module (M) comprising in series a reversible rotatable machine (R), typically a Roots, an adsorber (A) and a shut-off valve (V). The rotary machine (R) is alternately actuated, in one direction during a first phase of pressurization and of production and then, in the other direction, during a second phase of depressurization and desorption. Used particularly in the production of small and medium volumes of oxygen in modular installations.

Abstract: An assembly comprising an intermediate volume of medium-pressure gas (8) in a transportable housing (3) which is advantageously combined with a user apparatus (4) and selectively connectable to a high-pressure gas supply (1) by coupling it to a filling unit (2) via a quick connection system (15, 16). The assembly is particularly useful in portable welding apparatuses.

Abstract: A membrane nitrogen generator exhibiting increased flexibility and productivity in response to changes in customer demand which entails a membrane generator capable of generating nitrogen of variable flow rate and purity, bulk storage capacity for storing nitrogen of a purity which is higher than that required by a customer and flow and purity controllers for delivery to a customer plant.

Abstract: According to this process, there is produced gaseous nitrogen of medium purity under substantially the production pressure. This nitrogen is sent to the base of a distillation column (11) provided with a head condenser (23). The head condenser is cooled by means of liquid in the base of the low pressure column and if desired the liquid nitrogen at medium purity contained in a reservoir (10). Ultra-pure nitrogen is withdrawn as a product from the head of the column, and during periods of no production of nitrogen of medium purity and during periods in which the demand for ultra-pure nitrogen exceeds this production, there is sent to the base of the column gaseous reserve nitrogen of medium purity obtained from the liquid nitrogen of the reservoir and there is sent into the head condenser a relatively large flow of liquid nitrogen from this reservoir.

Abstract: Assembly of a pressurizable beverage keg (8) and a reservoir (1) of pressurization gas containing CO.sub.2 and comprising an expansion valve (5). The reservoir (1) is a toric portion (2) disposed concentrically at one end of the keg (8). The expansion valve (5) is mounted on one of the ends (3) of the torus. The keg (8) has at one end a handling skirt (11) defining an internal space, and the reservoir (1) is entirely disposed in the internal space of the skirt (11). The expansion valve (5) is coaxial to its end (3) of the torus (2) and has a passage (6) for emptying and filling the reservoir (1), opening through the peripheral wall of the reservoir (1) adjacent the same end (3) of the torus.

Abstract: A membrane nitrogen gas generator, containing a feed stream compressor, one or more filtering membranes, each having a permeate side and a non-permeate side, in fluid connection with and downstream of the feed stream compressor, and one or more product storage containers capable of storing a product having a higher purity than is required by customer demand, and which generator is capable of generating an increased flow rate during periods of high demand.

Abstract: A membrane nitrogen generator adapted to deliver a flow rate of nitrogen gas having a purity at least equal to P.sub.0, which contains:a) a source of compressed nitrogen containing gas having a purity lower than P.sub.0, the source having a maximum flow rate Fm.sub.1 ;b) a varyer connected to the source, which is adapted to vary the flow rate of the source between Fm.sub.1 and 0;c) a nitrogen membrane fed by the source which is capable of delivering a low purity nitrogen gas having a purity P.sub.1, which purity is lower than P.sub.0 at the maximum flow rate Fm.sub.1 ;d) a source of high purity compressed nitrogen gas having a purity which is greater than P.sub.0 which has a controllable flow rate of from 0 to a maximum flow rate value of Fm.sub.2 ;e) a mixer; andf) a purity controller.

Abstract: A method structure for the compression of data utilizes an encoder which effects a transform with the aid of a coding neural network, and a decoder which includes a matched decoding neural network with effects almost the inverse transform of the encoder. The method puts in competition M coding neural networks (30.sub.1 to 30.sub.M) wherein M>1 positioned at the transmission end which effects a same type of transform and the encoded data of one of which are transmitted, after selection (32, 33) at a given instant, towards a matched decoding neural network which forms part of a set of several matched neural networks (60.sub.1 to 60.sub.Q) provided at the receiver end. Learning is effected on the basis of predetermined samples. The encoder may comprise, in addition to the coding neural network (30.sub.1 to 30.sub.M), a matched decoding neural network (35.sub.1 to 35.sub.M) so as to effect the selection (32, 33) of the best coding neural network in accordance with an error criterion.

Abstract: The separation of a gaseous mixture of at least three components, by permeation, wherein a more permeable component, e.g. hydrogen, is separated from an intermediately permeable component and a less permeable component, e.g. CO.sub.2 and CO, respectively, in a first permeator. The residue from the first permeator, e.g. CO.sub.2 and CO, is introduced into a second permeator in which the intermediately permeable component, e.g. CO.sub.2, is separated from the less permeable component, e.g. CO. The less permeable component, e.g. CO, is then directly and completely introduced into the downstream side of the first permeator, where it rejoins the more permeable component, e.g. H.sub.2. The partial pressure of the more permeable component in the starting gaseous mixture, e.g. H.sub.2, is maintained higher than its partial pressure in the final mixture of e.g. H.sub.2 and CO.

Abstract: This process comprises eliminating the ammonia from a gaseous effluent of the treatment of scrubbing with a liquid essentially comprising water, regenerating the scrubbing liquid by stripping countercurrent with respect to the gas to be treated, then recycling at least most of the regenerated scrubbing liquid by putting it into thermal exchange relation with the scrubbing liquid to be regenerated.Application in the production of CO.sub.2 by the treatment of smoke with ammonia.