Abstract: Provided are a scroll preparing method using a two-dimensional material and a scroll prepared thereby. The scroll preparing method comprises preparing a two-dimensional material. The two-dimensional material is scrolled by providing an amphiphilic substance having a hydrophilic portion and a hydrophobic portion on the two-dimensional material. As a result, a scroll composite including the amphiphilic substance disposed inside a scroll structure is formed.

Abstract: An activated nano-porous carbon is produced using a liquid organic compound as a starting material. A combination of the liquid organic compound with organic acids is mixed with conductive carbon powder and polymerized. The polymerized material is then carbonized and activated using physical or chemical methods. The activated nano-porous carbon obtained using this method has been used to fabricate EDLC devices. The carbon has also shown large surface area (up to ˜2000 m2/gm, depending on the degree of activation) and can be used for various other activated carbon applications.

Abstract: A method produces activated carbon, suitable in particular for use in double-layer condensers. The method includes a) producing a mixture of a preferably pulverulent carbon material, a base and a hydrophilic polymer chemically inert to the base, b) pressing the mixture produced in step a) to form a pressing and c) activating the pressed body produced in step b).

Abstract: A process for a gas phase thermochemical reduction of oxygenated gas, such as carbon dioxide (CO2), by a solid activated charcoal to obtain premium grade, very high purity, carbon monoxide (CO) product. Whereby granular activated carbon (GAC) or powdered activated carbon (PAC) via a high temperature Reverse Boudouard Reduction Reaction (RBRR) using an oxygen exchange mechanism (OEM), is used to yield the carbon monoxide (CO) product in both a non-catalytic and a catalytic reactor.

Abstract: The present invention relates to a method for fabricating an array of nanoparticle clusters, in which a thermally transformable organic liquid crystal film having a periodic array of micro-sized dimple-like defect structures spontaneously transformed by thermal sublimation of liquid crystal molecules is used as a template, and nanoparticles form self-assembled clusters having a uniform size with respect to the defect structures, thereby achieving a periodic array of nanoparticle clusters.

Abstract: Methods to recover or separate cesium formate or rubidium formate or both from a mixed alkali metal formate blend are described. One method involves adding cesium sulfate or rubidium sulfate to the mixed alkali metal formate blend in order to preferentially precipitate potassium sulfate from the mixed alkali metal formate blend. Another method involves adding cesium carbonate or cesium bicarbonate or both to preferentially precipitate potassium carbonate/bicarbonate and/or other non-cesium or non-rubidium metals from the mixed alkali metal blend. Further optional steps are also described. Still one other method involves converting cesium sulfate to cesium hydroxide.

Abstract: Novel colored compounds with a hibonite structure and a method for making the same are disclosed. The compounds may have a formula AAl12-x-yMaxMbyO19 where A is typically an alkali metal, an alkaline earth metal, a rare earth metal, Pb, Bi or any combination thereof, and Ma is Ni, Fe, Cu, Cr, V, Mn, or Co or any combination thereof, and Mb is Ti, Sn, Ge, Si, Zr, Hf, Ga, In, Zn, Mg, Nb, Ta, Sb, Mo, W or Te or any combination thereof. Compounds with varying colors, such as blue, can be made by varying A, Ma and Mb and their relative amounts. Compositions comprising the compounds and methods for making and using the same are also disclosed.

Abstract: A method for recycling production salt water comprises receiving production salt water from an oil well. The production salt water is separated into separate streams of salt water and oil. The salt water is pre-heated to a temperature no less than 2 degrees Fahrenheit below the boiling point of the salt water. The pre-heated salt water is transferred to a separation tank, and the heated salt water is separated in the separation tank into steam and salt by boiling water.

Abstract: The present disclosure relates to a method of disinfecting a fluid comprising at least one live microbial organism. The method includes contacting the fluid comprising the at least one microbial organism with an effective amount of a photo-catalyst while exposing the fluid and the photo-catalyst to light from at least one light source with a wavelength of about 300-550 nm to reduce the number of the at least one live microbial organism to a predetermined level. The photo-catalyst comprises tungsten trioxide nanoparticles doped with palladium nanoparticles, and the palladium nanoparticles are present in an amount of about 0.1-5% of the total weight of the tungsten trioxide nanoparticles and the palladium nanoparticles.

Abstract: A fluid disinfection system comprising at least one UV light source to provide UV radiation into a chamber. The chamber containing an amount of fluid to be disinfected and fitted with at least one adjustable wall. The adjustable wall positioned on an upper surface of the fluid to reflect UV radiation within the amount of fluid. This adjustable wall effectively providing a variable volume chamber in which fluid disinfection can occur.

Abstract: A portable system for treatment of liquids, gases, or both using precise energy separation (PES) is described herein. The system includes a power generation component which charges one or more energy storage units and powers the PES component of the portable system. The PES component includes one or more energy of dissociation sources and the energy storage units power the sources to provide an effective amount, intensity, and frequency of a promoter energy to specifically dissociate one or more target bonds of the target molecule present in contaminated liquids, gases, or both. Optionally, the energy stored in the system can act as a supplementary or back up power source.

Abstract: Embodiments of the invention include an elongate chamber. A UV source includes a semiconductor device, the semiconductor device including an active layer disposed between an n-type region and a p-type region. The active layer emits radiation having a peak wavelength in a UV range. The semiconductor device is positioned on a wall of the elongate chamber. An inner surface of the elongate chamber is reflective.

Abstract: When a plurality of cyclones are used as a separation device of a water treatment device, there have been as many lower liquid containers as the number of cyclones, resulting in high cost. Provided is a centrifugal solid-liquid separation device including: a plurality of cyclones respectively having at least a liquid inlet, a liquid outlet, and a lower liquid port; and a lower liquid container communicating with the respective lower liquid ports of the plurality of cyclones via pipes, arranged below the plurality of cyclones, and having a drain hole in its bottom side. The lower liquid container includes a space forming portion above lower opening ends of the pipes. Also provided is a water treatment device using this centrifugal solid-liquid separation device.

Abstract: A method for removing hydrogen sulfide from a liquid stream is described. The method includes contacting the liquid stream including a first amount of hydrogen sulfide with a first side of a porous gas-liquid separation membrane. The hydrogen sulfide moves through the pores of the membrane from the first side to a second, opposite side of the membrane. The method further includes contacting a receiving fluid with the second, opposite side of the porous membrane to receive the hydrogen sulfide. The liquid stream is thus converted to a reduced-sulfide liquid stream having a second amount of hydrogen sulfide that is less than the first amount of hydrogen sulfide. A method for removing ammonia from a liquid stream is also described.

Abstract: Provided is an interfacial polymerization process for preparation of a highly permeable thin film composite membrane, which can be used for nanofiltration, forward osmosis, or reverse osmosis, particularly for use with brackish water at low energy conditions. The process includes contacting a porous support membrane with an aqueous phase containing a polyamine and a flux enhancing combination of additives that includes a metal chelate additive containing a bidentate ligand and a metal atom or metal ion and a phosphoramide to form a coated support membrane, and applying an organic phase containing a polyfunctional acid halide to the coated support membrane to interfacially polymerize the polyamine and the polyfunctional acid halide to form a discrimination layer of the thin film composite membrane. Also provided are the membranes prepared by the methods and reverse osmosis modules containing the membranes.

Abstract: Provided is an interfacial polymerization process for preparation of a highly permeable thin film composite membrane, which can be used for nanofiltration, or forward or reverse osmosis, for use with tap water, seawater and brackish water, particularly for use with brackish water at low energy conditions. The process includes contacting a porous support membrane with an aqueous phase containing a polyamine and a flux enhancing combination, which includes a metal chelate additive containing a bidentate ligand and a metal atom or metal ion and a dialkyl sulfoxide, to form a coated support membrane, and applying an organic phase containing a polyfunctional acid halide to the coated support membrane to interfacially polymerize the polyamine and the polyfunctional acid halide to form a discrimination layer of the thin film composite membrane. Also provided are the membranes prepared by the methods and reverse osmosis modules containing the membranes.

Abstract: In order to prevent an efficiency of lowering an oxidation-reduction potential of a liquid from being degraded when scales such as Ca contained in the liquid adsorb to an electrode and the liquid is subjected to electrolysis while the scales and the like adsorb to the electrode, provided is an alternating current electrolysis method for a liquid, including: arranging a pair of alternating electrodes each formed of a metal that lowers an oxidation-reduction potential and a first ground electrode formed of at least a metal in a liquid contained in a liquid tank; and controlling so that an alternating current is applied between the pair of alternating electrodes and an alternating current is intermittently applied from a ground potential to the first ground electrode.

Abstract: A CDI-type water treatment device according to the present invention comprises: a filter unit for purifying raw water in a CDI type through an electrode part formed by alternately stacking electrodes and separators; and a sterilization unit provided on the front of the filter unit to supply the electrode part with a sterilization substance, which has been generated from the raw water in order to sterilize the electrode part. The sterilization unit, in this case, preferably operates after a predetermined time has passed since the electrode part has both stopped purifying raw water and stopped regenerating the electrodes.

Abstract: A method and assembly for treating waste water by way of a chemical/physical process of pulverizing and dewatering sewage waste on board a variety of different marine vessels. A method and assembly for treating waste water comprising pulverizing solid(s) for particle size reduction, disinfection and sterilization of harmful organisms, solid collection, dewatering solid(s) for disposal, and dechlorinating a final outfall without use of dilution in order to meet an allowable level of contaminants prior to discharge.

Abstract: A water treatment system includes a water treatment facility which has a coagulation treatment unit injecting a coagulant into water to be treated including oil components and performing coagulation treatment and a monitoring control device which has an oil water separating unit introducing a part of the supernatant water after the coagulation treatment by the coagulation treatment unit and separating the oil components and a deposition tank depositing soluble components dissolved in the supernatant water after separating the oil water. The monitoring control device has a control unit which controls an injection rate of the coagulant, on the basis of at least a deposition amount of the soluble components by the deposition tank.

Abstract: Some embodiments provide a chemical balancing system for a pool that includes a salt chlorine generator system. The salt chlorine generator system produces chlorine through an electrolytic process at a salt chlorine generator cell in communication with a flow of water from the pool. A pH monitoring and balancing unit is coupled to the salt chlorine generator system. A power cord connects a power supply to the salt chlorine generator. A controller is in communication with both the salt chlorine generator system and the pH monitoring and balancing unit. The controller is configured to estimate a current pH value of the pool, determine how much pH balancing solution is required to re-balance the pool to a desired pH level, and dispense pH balancing solution until the pH level in the pool reaches the desired pH level.

Abstract: Provided is a ballast water treatment apparatus by using sodium dichloroisocyanurate. The ballast water treatment apparatus includes: a cartridge that is provided with an inlet and an outlet in order that a fresh water is introduced and discharged, that is provided with an inlet valve and an exhaust valve installed in the inlet and the outlet respectively, and that is equipped with the sodium dichloroisocyanurate; and a dissolution tank that is equipped with a agitator configured to be connected to the outlet of the cartridge to agitate the sodium dichloroisocyanurate.

Abstract: A faucet apparatus with an ozonizer may comprise a faucet, a connecting unit, a bubbler and a control sleeve. An outer surface of the connecting unit has at least a first annular groove, and an elastic ring is disposed in the first annular groove. A first threaded segment is formed at a lower end of the connecting unit, and a bore penetrating through the outer surface of the connecting unit is located between the elastic ring and the first threaded segment. By turning the control sleeve to adjust the relative positions between the control sleeve and the connecting unit, the present invention is configured to prevent the control sleeve from being moved by water flow or airflow and to accurately control the use of the ozone thus improving the practicability thereof.

Abstract: An assembly for treating wastewater may include a vessel having an inlet configured to direct wastewater into the vessel and an outlet configured to direct treated water out of the vessel. The inlet and the outlet are generally disposed at opposite ends of the longitudinal dimension of the vessel such that the wastewater generally flows in the longitudinal direction. The assembly includes at least one mass of loose fibre matrix removably inserted into the vessel. The at least one mass of loose fibre matrix extends substantially across a width dimension of the vessel, wherein the width dimension is generally perpendicular to the longitudinal dimension. The mass of loose fibre matrix supports the growth of a biofilm-coated matrix that permits the flow of wastewater through the mass of loose fibre matrix. The vessel and the mass of loose fibre matrix are sized and arranged such that the wastewater is exposed to the biofilm-coated matrix for a time sufficient to remove a desired metal from the wastewater.

Abstract: The water filtration system may include a support base. A first receptacle may be detachably disposed on the support base and configured to store source water. A second receptacle may be detachably disposed on the support base and configured to store supply water. A filter system may be disposed between the first receptacle and the second receptacle.

Abstract: Methods for treatment of sludge with microwave irradiation for improving its dewatering are provided. In one embodiment, the method includes exposing the sludge to microwave irradiation at an absorbed power density of between about 7 W/ml and about 13 W/ml. Turbidity, total solids content and overall dewaterability are improved when the microwave irradiation treatment is combined with another method for dewatering sludge, such as enzyme treatment, conditioning with a flocculating agent and mechanical dewatering.

Abstract: Disclosed is a sludge dehydrator equipped with a main-axis screw conveyer section and a non-axis screw conveyer section. The sludge dehydrator includes a cylinder having holes or slits that allow water squeezed out of sludge to be discharged therethrough and a sludge compressing means that is installed to extend along a central axis of the cylinder and transports and compresses sludge so that water squeezed out of the sludge to be discharged through the holes or slits. The compressing means includes: a first shaft that extends along the central axis of the cylinder; a second shaft that surrounds a portion of a length of the first shaft and is rotatably combined with the first shaft; and a screw conveyer that is integrated with a circumferential surface of the first shaft and is installed to rotate along a circumferential surface of the second shaft.

Abstract: A glass sheet is formed on a mold into a glass article having a three-dimensional shape. The mold, with the glass article thereon, is arranged within an interior space of a radiation shield such that the mold is between a leading end barrier and a trailing end barrier of the radiation shield. The mold, glass article, and radiation shield are translated through a sequence of cooling stations while maintaining the mold between the leading and trailing end barriers, wherein the leading and trailing end barriers inhibit radiation heat transfer at leading and trailing ends of the mold.

Abstract: A high silica glass composition comprising about 92 to about 99.9999 wt. % SiO2 and from about 0.0001 to about 8 wt. % of at least one dopant selected from Al2O3, CeO2, TiO2, La2O3, Y2O3, Nd2O3, other rare earth oxides, and mixtures of two or more thereof. The glass composition has a working point temperature ranging from 600 to 2,000° C. These compositions exhibit stability similar to pure fused quartz, but have a moderate working temperature to enable cost effective fabrication of pharmaceutical packages. The glass is particularly useful as a packaging material for pharmaceutical applications, such as, for example pre-filled syringes, ampoules and vials.

Abstract: A glass is a glass sheet containing, as expressed by mass percentage based on oxides, 63 to 75% of SiO2, 3 to 12% of Al2O3, 3 to 10% of MgO, 0.5 to 10% of CaO, 0 to 3% of SrO, 0 to 3% of BaO, 10 to 18% of Na2O, 0 to 8% of K2O, 0 to 3% of ZrO2, and 0.005 to 0.25% of Fe2O3. The glass has a temperature (T2) at which a viscosity thereof reaches 102 dPa·s of 1525° C. or lower. In the glass, R2O/Al2O3 is 2.0 or more and 4.6 or less (in the formula, the R2O is Na2O+K2O).

Abstract: A chemically strengthened glass contains, as expressed by mass percentage based on oxides, 60% to 75% of SiO2, 3% to 9% of Al2O3, 2% to 10% of MgO, 3% to 10% of CaO, 10% to 18% of Na2O, at most 4% of K2O, 0% to 3% of ZrO2, 0% to 0.3% of TiO2, and 0.02% to 0.4% of SO3. It has a temperature T2 at which a viscosity of a glass melt is 100 dPa·sec of 1530° C. or lower. In a chemically strengthened main surface thereof, it has a depth of a compressive stress layer of 8 ?m or more and a surface compressive stress of 500 MPa or more.

Abstract: A glass for chemical strengthening is a glass sheet containing, as expressed by mass percentage based on oxides, 60 to 75% of SiO2, 3 to 12% of Al2O3, 2 to 10% of MgO, 0 to 10% of CaO, 0 to 3% of SrO, 0 to 3% of BaO, 10 to 18% of Na2O, 0 to 8% of K2O, 0 to 3% of ZrO2, 0 to 0.3% of TiO2, 0.005 to 0.2% of Fe2O3, and 0.02 to 0.4% of SO3. The glass has a sheet thickness of 0.2 mm or more and 1.2 mm or less. A value of ?-OH measured without polishing both front and back surfaces of the glass sheet is lower than a value of ?-OH measured after polishing surface layers of both the front and back surfaces of the glass sheet by 50 ?m or more each.

Abstract: A glass-ceramic component is provided that has a low average coefficient of thermal expansion (CTE) and a high CTE homogeneity. The use of such a component and a process for producing such a component are also provided.

Abstract: Provided is a high-strength crystallized glass or substrate having a high visible light transmittance and a good color balance, which is suitable for use in protecting members of portable electronic devices, optical devices and the like. Provided is a crystallized glass comprising, in terms of mol % on an oxide basis: an SiO2 component of 30.0% or more and 70.0% or less, an Al2O3 component of 8.0% or more and 25.0%, an Na2O component of 0% or more and 25.0% or less, an MgO component of 0% or more and 25.0% or less, a ZnO component of 0% or more and 30.0% or less and a TiO2 component of 0% or more and 10.0% or less, the molar ratio [Al2O3/(MgO+ZnO)] having a value of 0.5 or more and 2.0 or less, and comprising one or more selected from RAl2O4, RTi2O5, R2TiO4, R2SiO4, RAl2Si2O8 and R2Al4Si5O18 as a crystal phase.

Abstract: Certain example embodiments of this invention relate to ruggedized switchable glazings, and/or methods of making the same. The PDLC stack of certain example embodiments includes an outer substrate, a low-E UV blocking coating deposited on an inner surface of the outer substrate, a first PVB or EVA laminate, a first PET layer, a first TCO layer, the PDLC layer, a second TCO layer, a second PET layer, a second PVB or EVA laminate, and an inner substrate. The substrates may be glass substrates. The low-E UV blocking coating may include at least two layers of or including silver and/or may include one or more IR layers. Thus, certain example embodiments may advantageously reduce one or more problems associated with residual haze, color change, flicker, structural changes in the polymer and/or the LC, degradations in state-switching response times, delamination, etc.

Abstract: Provided herein are compositions, methods, and systems for a material containing metastable carbonate, such as reactive vaterite and water repellant.

Abstract: Compositions for a curable substance for fixing purposes, comprising an epoxy component (a), which contains curable epoxides, and a hardener component (b), which comprises a Mannich base formulation, obtainable by reaction of specific amines, and/or mixtures of styrenated phenols with low molecular weight amines, to novel Mannich base formulations or mixtures of styrenated phenols with low molecular weight amines, and to the use of such Mannich base formulations and/or of such mixtures of styrenated phenols with low molecular weight amines, and in each case especially further additional ingredients, especially in hardener components for epoxy resins.

Abstract: A method of finishing an interior wall includes the steps of preparing a substrate of building panels comprising gypsum, cement or combinations thereof, said substrate having a surface, followed by applying a coating to the substrate, said coating comprising 1-30% by weight of a latex emulsion binder, 30-80% by weight calcium sulfate hemihydrate, up to about 8% by weight of a set inhibiting agent and 20-60% by weight water.

Abstract: The invention provides novel articles of composite materials having hollow interior channels or passageways, or otherwise being hollowed out, and formulations and methods for their manufacture and uses. These hollow core objects are suitable for a variety of applications in construction, pavements and landscaping, and infrastructure.

Abstract: Embodiments of the invention relate to polycrystalline diamond (“PCD”) exhibiting enhanced diamond-to-diamond bonding. In an embodiment, PCD includes a plurality of diamond grains defining a plurality of interstitial regions. A metal-solvent catalyst occupies at least a portion of the plurality of interstitial regions. The plurality of diamond grains and the metal-solvent catalyst collectively exhibit a coercivity of about 115 Oersteds (“Oe”) or more and a specific magnetic saturation of about 15 Gauss·cm3/grams (“G·cm3/g”) or less. Other embodiments are directed to polycrystalline diamond compacts (“PDCs”) employing such PCD, methods of forming PCD and PDCs, and various applications for such PCD and PDCs in rotary drill bits, bearing apparatuses, and wire-drawing dies.

Abstract: The present invention relates to mitigating the deleterious effect of clays, which are born or conveyed by sand aggregates, crushed rock, gravel, and other aggregates used in the manufacture of concrete, upon the dosage efficiency of cement dispersants or other admixtures which are added into concrete. Instead of introducing the entire cement mitigation agent (CMA) into the aggregate material at a quarry or upon batching in the mix plant in a singular, upfront dose, the present invention comprises combining at least 51% and up to 100%, and, most preferably, at least 75% and up to 100%, of the total dosage amount of the CMAs into a given concrete mix batch during the transit portion of the delivery between initial batching at the mix plant and the pour event at the job site.

Abstract: The invention provides compositions and methods directed to carbonation of a cement mix during mixing. The carbonation may be controlled by one or more feedback mechanisms to adjust carbon dioxide delivery based on one or more characteristics of the mix or other aspects of the mixing operation.

Abstract: The invention is directed to manufacturing fertilizers having commercial levels of nitrogen reacted with organic substances. The process comprises treatment of organics with acid that acidifies and heats a mix causing the hydrolysis of polymers. The acidified organic mix is injected sequentially with a nitrogen base under conditions that result in a partially neutralized melt. The sterilized and liquefied organic matter is disbursed over recycled material for production of granules in a granulator before final drying. The process is green scalable, and safe for the location of community organics processing facilities in locations without generating a nuisance to local communities. Fertilizers also provide a green, dual nitrogen-release profile when applied to crops releasing a bolus of nitrogen over one to two weeks following application followed by a continued slow or enhanced efficiency release of nitrogen over a growing season.

Abstract: A process for producing desired compounds from biomass, including treating a lignocellulosic waste stream in some embodiments. The waste stream is conditioned under acidic or basic conditions, and is then treated in a catalytic reaction step using a transition metal catalyst and an oxidant. The transition metal catalyst can be an iron-based nanoparticulate catalyst. In some embodiments, useful compounds such as lignin, crystalline cellulose and various platform chemicals are produced from the waste stream. In some embodiments, the waste stream is lignocellulosic agricultural or forestry waste. In some embodiments, the waste stream is manure. In some embodiments, desirable bioproducts are obtained from lignocellulosic biomasses using an iron-based nanoparticulate-catalyzed reaction conducted at alkaline pH.

Abstract: The present disclosure provides novel agricultural microbial inoculant compositions for uses in promoting plant growth, plant productivity and/or soil quality. The novel microbial inoculant compositions comprise one or more microbial species, one or more urease inhibitors and/or one or more nitrification inhibitors. The present disclosure also provides fertilizer compositions comprising said microbial inoculant compositions.

Abstract: A composter for various organic debris is designed to remove such debris, namely yard waste and other organic materials, and promote an effective composting process. The composter may have a device mounted thereon to collect leaves, grasses, soil, and the like. A liquid treatment may be applied to the ground organic material to enhance the decomposition process. A heat treatment may also be applied to the organic matter. Other treatments may also be necessary depending on the intended results and the type of organic matter being processed. The composter may further then be capable of spreading the compost over a desired area either immediately or once sufficiently decomposed. The composter may be controlled via an application or via a built in interface.

Abstract: A combustible element includes regions of fuel material interspersed with regions of oxidizer material. The element may be made by additive manufacturing processes, such as three-dimensional printing, with the fuel material regions and the oxidizer material regions placed in appropriate locations in layer of the combustible element. For example, different extruders may be used to extrude and deposit portions of a fuel filament and an oxidizer filament at different locations in each layer of the combustible element. The combustible element may define a combustion chamber within the element, where combustion occurs when the combustible element is ignited. The fuel material and the oxidizer material may be selected, and their relative amounts may be controlled, such that desired relative amounts of fuel and oxidizer are present for combustion with desired characteristics, such as combustion rate.

Abstract: The invention provides a process for the preparation of an olefinic product, the process comprising the steps of: (a) reacting an oxygenate feedstock, comprising oxygenate, in an oxygenate reaction zone in the presence of a catalyst comprising a molecular sieve, at a temperature in the range of from 350 to 1000° C.

Abstract: A process comprising hydrogenating a highly unsaturated hydrocarbon in the presence of a first hydrogenation catalyst and a second hydrogenation catalyst to one or more compounds including an unsaturated hydrocarbon such that a total conversion of the highly unsaturated hydrocarbon is about 99 mol % or greater. In the process, the first hydrogenation catalyst, the second hydrogenation catalyst, or both, have a hydrogenation selectivity to the unsaturated hydrocarbon of about 90% or greater.

Abstract: A process for preparing butadiene from n-butenes, comprising the steps of A) providing an input gas stream a1 comprising n-butenes; B) feeding the input gas stream a1 comprising n-butenes, an oxygenous gas and an oxygenous cycle gas stream a2 into at least one oxidative dehydrogenation zone and oxidatively dehydrogenating n-butenes to butadiene, giving a product gas stream b comprising butadiene, unconverted n-butenes, steam, oxygen, low-boiling hydrocarbons and high-boiling secondary components, with or without carbon oxides and with or without inert gases; Ca) cooling the product gas stream b and optionally at least partly removing high-boiling secondary components and steam, giving a product gas stream b?, Cb) compressing and cooling the product gas stream b? in at least one compression and cooling stage, giving at least one aqueous condensate stream c1 and one gas stream c2 comprising butadiene, n-butenes, steam, oxygen and low-boiling hydrocarbons, with or without carbon oxides and with or without ine