Abstract: A cryogenic installation unit comprises at least one item of equipment to be thermally insulated, a structure for containing the at least one item of equipment, a main insulation contained in the structure and, associated with this main insulation, a secondary insulation of lower thermal conductivity than the main insulation, said secondary insulation consisting of a vacuum insulation panel.

Abstract: Device and method for purifying a gas mixture to produce a concentrated gas, notably neon, starting from a mixture comprising neon, said device including, in a cold box housing a cryogenic purification circuit comprising, in series, at least one unit for purifying the mixture by cryogenic adsorption at a temperature between 65K and 100K and notably 65K, then a unit for cooling the mixture to a temperature between 25 and 65 K and then a unit for cryogenic distillation of the mixture to produce the concentrated liquid at the outlet of the cryogenic distillation unit, characterized in that the unit for cooling the mixture to a temperature between 25 and 65 K comprises at least one cryocooler that extracts thermal power from the mixture via a heat exchanger.

Abstract: In a process for the cryogenic separation of a methane-rich feed stream containing between 3 and 35% of oxygen and also nitrogen, the feed stream is cooled in order to produce a cooled stream, at least one portion of the cooled stream is sent to a distillation column, a bottom stream is withdrawn from the distillation column, the bottom stream being enriched in methane compared to the feed stream, a stream enriched in oxygen compared to the feed stream is withdrawn from the distillation column, and a nitrogen-rich stream is sent to the column.

Abstract: A plant for the membrane permeation treatment of a gaseous feedstream comprised of at least methane and carbon dioxide for producing a methane-enriched gaseous stream, comprises: a first membrane separation unit able to receive the gaseous feedstream and to produce a first carbon dioxide-enriched permeate and a first methane-enriched retentate, a second membrane separation unit able to receive the first retentate and to produce a second carbon dioxide-enriched permeate and a second methane-enriched retentate, a gas-gas ejector able to increase the pressure of the first permeate to a pressure of between 2 and 6 bar, more preferably between 3 and 4 bar, and a third membrane separation unit able to receive the first permeate compressed in the ejector and to produce a third methane-enriched retentate and a third CO2-enriched permeate.

Abstract: A four-stage membrane separation unit purification process, especially for prepurified biogas, in which a retentate from the first stage is fed as feed gas to a second stage, a permeate from the first stage is fed as feed gas to a third stage, a retentate from the third stage is fed as feed gas to a fourth stage.

Abstract: The invention relates to a method for membrane permeation of a gas flow including methane and carbon dioxide, wherein said gas flow is cooled to a temperature of 0° C. to ?60° C. before being fed into a membrane separation unit.

Abstract: A process for injecting biomethane into a network which has a gross calorific value of value X between X1 and X2, comprising the injection of nitrogen into the biomethane network before the injection of the biomethane into the network which has a gross calorific value of value X so as to reduce the calorific value of the biomethane network to a value between X1 and X2, with the nitrogen derived from the retentate of at least one membrane stage.

Abstract: A four-stage membrane separation unit purification process, especially for prepurified biogas, in which a retentate from the first stage is fed as feed gas to a second stage, a permeate from the first stage is fed as feed gas to a third stage, a retentate from the third stage is fed as feed gas to a fourth stage.

Abstract: The invention relates to a method producing a portioned column by forming a first segment and a third segment into arcuate segments, and attaching these arcuate segments to a second z-shaped segment to from two contiguous volumes with approximately semi-circular cross-sections that combine to form a partitioned, approximately cylindrical segment.

Abstract: A cryogenic installation unit comprises at least one item of equipment to be thermally insulated, a structure for containing the at least one item of equipment, a main insulation contained in the structure and, associated with this main insulation, a secondary insulation of lower thermal conductivity than the main insulation, said secondary insulation consisting of a vacuum insulation panel.

Abstract: In a process for the cryogenic separation of a methane-rich feed stream containing between 3 and 35% of oxygen and also nitrogen, the feed stream is cooled in order to produce a cooled stream, at least one portion of the cooled stream is sent to a distillation column, a bottom stream is withdrawn from the distillation column, the bottom stream being enriched in methane compared to the feed stream, a stream enriched in oxygen compared to the feed stream is withdrawn from the distillation column, and a nitrogen-rich stream is sent to the column.

Abstract: A method and apparatus for the cryogenic distillation of air to produce gaseous oxygen with a purity between 75 and 95 mol % and a pressure lower than 5.5 bar abs using a triple column having a high-pressure column, a low-pressure column, and a medium-pressure column, wherein the medium-pressure column is at least partially thermally coupled with the low-pressure column and the high-pressure column is also at least partially thermally coupled with the low-pressure column.

Abstract: A cryogenic installation unit comprises at least one item of equipment (2, 6A to 6H, 15) to be thermally insulated, a structure (1) for containing the at least one item of equipment, a main insulation (3) contained in the structure and, associated with this main insulation, a secondary insulation (5) of lower thermal conductivity than the main insulation, said secondary insulation (5) consisting of a vacuum insulation panel.

Abstract: The invention relates to a method producing a portioned column by forming a first segment and a third segment into arcuate segments, and attaching these arcuate segments to a second z-shaped segment to from two contiguous volumes with approximately semi-circular cross-sections that combine to form a partitioned, approximately cylindrical segment.

Abstract: A cryogenic installation unit comprises at least one item of equipment (2, 6A to 6H, 15) to be thermally insulated, a structure (1) for containing the at least one item of equipment, a main insulation (3) contained in the structure and, associated with this main insulation, a secondary insulation (5) of lower thermal conductivity than the main insulation, said secondary insulation (5) consisting of a vacuum insulation panel.