Abstract: Helically coiled heat exchanger for the indirect exchange of heat between a two-phase first medium and a second medium has a shell surrounding a shell space, which extends along a longitudinal axis, an inlet for the admission of the two-phase first medium into the shell space, a tube bundle arranged in the shell space and having multiple helically coiled tubes for accommodating the second medium and a separating device for separating a gaseous phase from a liquid phase. The separating device has a tray arranged above the tube bundle which serves for collecting the liquid phase. The tray has a plurality of chimneys for separating the two phases. Each chimney projects from the tray from a side of the tray facing away from the tube bundle and is covered by a roof. An opening in the tray between the roof and an upper end of the respective chimney, there is provided an inlet opening via which the gaseous phase can flow into the respective chimney.

Abstract: An arrangement comprising at least one liquefaction plant for liquefying a gaseous medium to produce a liquefied medium; and at least one storage tank for storing the liquefied medium. At least one first transfer line is connected between the liquefaction plant and the storage tank, for transferring liquefied medium from the liquefaction plant into the storage tank. At least one second transfer line is connected between the liquefaction plant and the storage tank, for transferring gaseous medium from the storage tank into the liquefaction plant. At least one shut-off valve is provided in each transfer line. The apparatus further includes a bypass line.

Abstract: A process for producing ethylene and acetic acid is proposed in which an ethane- and oxygen-containing reaction input stream is formed and a portion of the ethane and of the oxygen in the reaction input stream is converted into the ethylene and the acetic acid by oxidative dehydrogenation to obtain a process gas, wherein the process gas contains the unconverted portion of the ethane and of the oxygen, the ethylene and the acetic acid and also water. It is provided that the process comprises adjusting in the process gas a water partial pressure according to a specified product ratio of the acetic acid to the ethylene to a value in a range between 0.7 and 5 bar (abs.). A corresponding plant (100) likewise forms part of the subject matter of the present invention.

Abstract: A method for flame straightening is disclosed, wherein acetylene with oxygen is combusted by means of a burner to yield a flame, and the flame is directed onto a workpiece so as to heat the workpiece, wherein an electric field is applied between the burner and the non-melting workpiece which is electrically conductive, or the electric field is applied between the burner and a non-melting electrode arranged on the non-melting workpiece side to reduce NOx emission.

Abstract: Proposed is a process (100) for producing ethylene in which ethane in a reaction input is partly catalytically converted by oxidative dehydrogenation (1) in the presence of oxygen to obtain a gaseous first component mixture containing at least ethane, ethylene, acetic acid and water. It is provided that at least a portion of the gaseous first component mixture is subjected to a scrubbing operation with a scrubbing liquid to obtain a liquid second component mixture containing water and acetic acid, that a first proportion of the second component mixture is used for forming the scrubbing liquid, that a second proportion of the second component mixture is subjected to a solvent extraction to obtain a liquid third component mixture containing at least one organic solvent and acetic acid and that at least a portion of the liquid third component mixture is heated and subjected to a distillation to obtain a liquid containing predominantly or exclusively acetic acid.

Abstract: An apparatus is provided for installing a packing disk of a structured packing into a vessel of a material-exchange column. The apparatus has a separating device for separating the endless packing strip into individual packing sheets, a conveying device for conveying individual packing sheets to the vessel, to stack the individual packing sheets in the vessel to form the packing disk, and a measuring device designed to measure a preferably horizontal distance between two mutually opposite points of an internal contour of the vessel. The separating device is designed to separate individual packing sheets from the endless packing strip such that a respective length of the packing sheets is less than or equal to the measured distance. A central axis of the vessel is arranged horizontally in the apparatus.

Abstract: A method and an apparatus for producing a block for a plate heat exchange is described wherein partition plates and heat-conducting structures are stacked together with brazing material in a block, and the block is subjected to a first force in the vertical direction. A first, upper section of the block is heated to a brazing-material softening temperature, and at the same time, a second section of the block is brought to a tempering temperature which is lower than the brazing-material softening temperature. Subsequently, the block is not subjected to any force from the outside or is subjected to a second force which is lower than the first force, and the second section of the block is brought to a brazing-material softening temperature. At the same time, the first section is brought to a tempering temperature which is lower than the brazing-material softening temperature.

Abstract: The present invention relates to a method for liquefying hydrogen, the method comprises the steps of: cooling a feed gas stream comprising hydrogen with a pressure of at least 15 bar(a) to a temperature below the critical temperature of hydrogen in a first cooling step yielding a liquid product stream. According to the invention, the feed gas stream is cooled by a closed first cooling cycle with a high pressure first refrigerant stream comprising hydrogen, wherein the high pressure first refrigerant stream is separated into at least two partial streams, a first partial stream is expanded to low pressure, thereby producing cold to cool the precooled feed gas below the critical pressure of hydrogen, and compressed to a medium pressure, and wherein a second partial stream is expanded at least close to the medium pressure and guided into the medium pressure first partial stream.

Abstract: A transport container for helium, having an inner container for receiving helium, a thermal shield actively coolable with the aid of a cryogenic liquid and in which the inner container is accommodated, an outer container in which the thermal shield and inner container are accommodated, and a carrying ring provided on the thermal shield. The inner container is suspended from the carrying ring with the aid of first suspension rods, wherein the carrying ring is suspended from the outer container with the aid of second suspension rods, wherein at least one of the first suspension rods has a first spring device and at least one of the second suspension devices has a second spring device in order to ensure a spring pretension of the first suspension rods and the second suspension rods for different heat expansions of the inner container and the thermal shield.

Abstract: The invention relates to a process for producing an olefin in which a reaction input stream containing at least one paraffin, oxygen and water is formed and in which a portion of the paraffin and of the oxygen in the reaction input stream is converted into the olefin by oxidative dehydrogenation using a catalyst to obtain a process gas, wherein the process gas contains at least the unconverted portion of the paraffin and of the oxygen, the olefin and the water from the reaction input stream. It is provided that at least one parameter which indicates an activity of the catalyst is determined and that an amount of the water in the reaction input stream is adjusted on the basis of the at least one determined parameter. A corresponding plant (100) likewise forms part of the subject matter of the invention.

Abstract: A heat exchanger, providing indirect heat transfer between a first fluid and at least one second fluid, comprises a jacket enclosing a jacket space for accommodating the first fluid and a tube bundle arranged in the jacket space and having a plurality of tubes for accommodating the at least one second fluid. The tubes form multiple tube layers. A shroud arranged in the jacket space encloses an outermost tube layer of the tube bundle. Spacers extending along the longitudinal axis are arranged between the shroud and the outermost tube layer. An interspace is present between any two spacers adjacent in the circumferential direction of the shroud, and between the shroud and the uppermost tube layer. A flow obstruction is arranged in the respective interspace and is designed to prevent or suppress a flow of the first fluid in the respective interspace, at least over a part section thereof.

Abstract: A distillation column system and a plant are for production of oxygen by cryogenic fractionation of air. The distillation column system has a high-pressure column and a low-pressure column, a main condenser, and an argon column with an argon column top condenser. The low-pressure column comprises an upper mass transfer region, a lower mass transfer region and a middle mass transfer region. The argon column top condenser is arranged within the low-pressure column between the upper and middle mass transfer regions and is configured as a forced-flow evaporator.

Abstract: A valve arrangement in particular four-way switch, for an adsorber station of an air separation plant, having a first valve device comprising a first gas inlet/gas outlet, a second valve device, comprising a second gas inlet/gas outlet, and a first connecting piece, which fluidically connects a first housing section of the first device to a second housing section of the second valve device, the first connecting piece has a third gas inlet/gas outlet. A second connecting piece, fluidically connects the first housing section to the second housing section, wherein the second connecting piece has a fourth gas inlet/gas outlet.

Abstract: The present invention relates to a refrigerant composition comprising neon and hydrogen. The present invention further relates to the use of the refrigerant composition in liquefying gaseous substances such as hydrogen or helium.

Abstract: A method for enhanced or improved oil recovery includes injecting a miscible injection fluid comprising an unfractionated hydrocarbon mixture through an injection well into a hydrocarbon bearing reservoir at a structurally higher position to initiate gravity-stable displacement and gas cap expansion processes. Residual hydrocarbons in the hydrocarbon bearing reservoir are mobilized and displaced by the miscible injection fluid to a structurally lower position within the hydrocarbon bearing reservoir adjacent a production well through which they are produced to the surface.

Abstract: A heat exchanger for indirect heat exchange between a first and a second medium is provided with a shell space for receiving the first medium, and a tube bundle arranged in the shell space and for receiving the second medium. The tubes are helically wound in a number of tube layers onto a core tube. The tube bundle includes a first tube layer which is positioned further outward in the radial direction of the tube bundle from an adjacent second tube layer. The heat exchanger includes at least one spacer and the first tube bundle is supported against the second tube bundle via the at least one spacer. The at least one spacer has a flow-directing region designed to deflect part of the first medium flowing along a tube of the first tube layer in the direction of the second tube layer situated further inwards in the radical direction.

Abstract: A sensor module for connection between a fabrication tool and the head of the fabrication tool. The sensor module has an interface connectable to the fabrication tool, having: a power port for receiving power transmitted by the fabrication tool to the head, a gas port for receiving gas delivered by the fabrication tool to the head, and another interface connectable to the head which has another power port for delivering power to the head, another gas port for delivering gas, from the first gas port, to the head. The module also has a sensor module having a memory, a sensor for measuring power transmitted to the head, another sensor for measuring the gas delivered to the head, a device for transmitting information between the sensor module and a remote location, and a processor electronically connected to the memory, transmission device, and sensors.

Abstract: Integration of an oxyfuel combustion boiler at elevated pressures and a heat exchanger is achieved to produce carbon dioxide by feeding flue gas comprising carbon dioxide and water from the oxyfuel combustion boiler to a direct contact cooler column wherein water is condensed at a temperature of 0 to 10° C. lower than its dew point; feeding a portion of the condensed water from the direct contact cooler column to the oxyfuel combustion boiler; feeding a portion of the carbon dioxide from the direct contact cooler column to the oxyfuel combustion boiler; and recovering a portion of the carbon dioxide from the direct contact cooler column.

Abstract: Systems and methods of optimizing stimulation fluids in the form of a hydrocarbon foam, an emulsion based foam, an emulsion, and a gelled stimulation fluid, each comprising Y-Grade NGL, which is an unfractionated hydrocarbon mixture that comprises ethane, propane, butane, isobutane, and pentane plus, wherein the unfractionated hydrocarbon mixture is a byproduct of a condensed and demethanized hydrocarbon stream.

Abstract: A method and apparatus for the generative production of a three-dimensional component in a processing chamber are disclosed. The method performs the steps of providing a metal starting material in the processing chamber and melting the starting material by inputting energy, which are repeated multiple times. A process gas is passed through the processing chamber in a circuit. Hydrogen is added to the circulating gas, then the circulating gas is heated to a temperature above 500 ° C. and then cooled to a temperature below 60 ° C.