104 results about "Elemental oxygen" patented technology

A reactor comprising: a hollow shell defining a hermetic enclosure; a plurality of tube sheets disposed within said hermetic enclosure, a first one of said plurality of tube sheets defining a first chamber; at least one reaction tube each having a first end and an opposing second end, said first end being fixedly attached and substantially hermetically sealed to one end of said plurality of tube sheets and opening into said first chamber, the second end being axially unrestrained; each of said reaction tubes is comprised of an oxygen selective ion transport membrane with an anode side wherein said oxygen selective ion transport membrane is formed from a mixed conductor metal oxide that is effective for the transport of elemental oxygen at elevated temperatures and at least a portion of said first and second heat transfer sections are formed of metal; each of said reaction tubes includes first and second heat transfer sections and a reaction section, said reaction section disposed between said first and second heat transfer sections; a reforming catalyst disposed about said anode side of said oxygen selective ion transport membrane; a first process gas inlet; a second process gas inlet; and, a plurality of outlets.

A method for maintaining the temperature of an oxygen-selective ion transport membrane within a desired temperature range includes providing an ion transport reactor with the oxygen-selective ion transport membrane. An oxygen-donating feed gas is delivered to a cathode side at a first temperature, at a first rate, and at a first oxygen partial pressure and a reactant gas is supplied to an anode side at a second temperature and a second rate. A physical condition is then established within the ion transport reactor that favors the transport of elemental oxygen through the oxygen selective ion transport membrane as oxygen ions. One or more process variables are then regulated to maintain the temperature of the oxygen selective ion transport membrane within the desired range.

An apparatus for driving a turbine connected to a generator for generating power to supply to a grid the power derived from a rotating shaft includes a transmission for selectably driving either of a compressor or a direct current motor generator. The compressor compresses ambient air changing phase to liquid air. The direct current motor generator generates a current at a constant voltage for water electrolysis. A first bell containing a cathode collects elemental hydrogen; a second bell containing an anode collects elemental oxygen. The elemental hydrogen burns in the presence of the elemental oxygen to produce a highly energetic exhaust. A valve selectably admits either of the highly compressed air or the highly energetic exhaust into the turbine to drive the turbine thereby energizing the generator to supply the grid.

The invention provides a tin-titanium-silicon molecular sieve and a preparation method and application thereof. The tin-titanium-silicon molecular sieve contains elemental silicon, elemental titanium, elemental tin and elemental oxygen, and the interiors of at least a part of crystal grains of the tin-titanium-silicon molecular sieve have hole structures. The invention provides a method for hydroxylation of phenol. The method comprises a step of contacting phenol and hydrogen peroxide with a catalyst under the conditions of phenol hydroxylation, wherein the catalyst contains the tin-titanium-silicon molecular sieve provided by the invention. The tin-titanium-silicon molecular sieve provided by the invention has good catalytic oxidation; if applied to phenol hydroxylation, the tin-titanium-silicon molecular sieve provided has higher catalytic oxidation activity and particularly high selectivity on a para-position product hydroquinone compared with titanium-silicon molecular sieve not containing tin or a tin-loaded titanium-silicon molecular sieve.

It is an object of the present invention to control the crystal orientation of a ferroelectric thin film as dictated by the application of a ferroelectric thin film device. To accomplished the stated object, a bottom electrode containing at least iridium is formed over a surface preparation layer whose main component is zirconium oxide, and an ultra-thin titanium layer is laminated over the bottom electrode. An amorphous layer containing the elemental metal and elemental oxygen that constitute the ferroelectric is formed over the titanium layer, and a crystallized ferroelectric thin film is formed by heat treating this amorphous layer. If the thickness of the titanium layer is kept between 2 nm and 10 nm in the lamination thereof, the ferroelectric thin film will have a priority orientation of (100), and if it is kept between 10 nm and 20 nm, the ferroelectric thin film will have a priority orientation of (111).

The invention relates to a catalysis wet-type oxidation treatment method for sulfur-containing wastewater, which is mainly used for solving the problems of biological inhibition, not high removal rate of COD (chemical oxygen demand) and complex technique for treating sulfur-containing wastewater. In the method, industrial wastewater of which the COD value is 2000mg / l to 200000mg / l and the sulfur content is less than 70g / l and gases containing elemental oxygen are taken as raw materials which are in contact with a catalyst under the conditions that the reaction temperature is 230 to 300 DEG C, the reaction pressure is 3 to 10MPa, the liquid space velocity is 0.5 to 2.5h<-1> and the volume ratio in a standard state of the gas and liquid materials is (70-300):1, and therefore, the removal rate of the COD is larger than 95% and sulfurs in the wastewater are all converted into sulfate ions, wherein the catalyst comprises at least one oxide carrier selected from TiO2, Al2O3, SiO2 or ZrO2 and at least one metal or oxide carried on the oxide carrier and selected from Pt, Pd, Ru, Ir or Rh in parts by weight. The problems are nicely solved with the technical scheme, and the catalysis wet-type oxidation treatment method for sulfur-containing wastewater can be used in the industrial treatment of sulfur-containing industrial wastewater.

The invention relates to a polyimide material denuded by anti-atomic oxygen and a preparation method thereof. An organic component containing phosphorus and an anti-atomic oxygen inorganic component are injected into a polyimide solution or a polyimide precursor solution simultaneously in accordance with a certain proportion so as to prepare an organic-inorganic hybrid polyimide material denuded by the anti-atomic oxygen. An effectiveness test of the atomic oxygen shows that when the accumulative flux of atomic oxygen of the organic-inorganic hybrid polyimide material reaches 6.08 multiplied by 10<20>atom / cm<2>, and the atomic oxygen denudation rate can decrease lower than 15 percent of pure polyimide which is obviously better than the atomic oxygen denudation property of the pure polyimide.

The invention relates to a catalysis wet-type oxidation treatment method for cyanogen-containing wastewater, which is mainly used for solving the problem of incapability of simultaneously treating other organic pollutants in wastewater and secondary pollution during cyanogen-containing wastewater treatment. In the invention, industrial wastewater of which the COD (chemical oxygen demand) value is 2000mg / l to 200000mg / l and the total cyanogen content is 10 to 20000mg / l and gases containing elemental oxygen are taken as raw materials which are in contact with a catalyst under the conditions that the reaction temperature is 230 to 300 DEG C, the reaction pressure is 3 to 10MPa, the liquid space velocity is 0.5-2.5 h<-1> and the volume ratio in a standard state of the gas and liquid materials is (70-300):1 , and therefore, the removal rate of the COD is larger than 95% and the total cyanogen is less than 5 ppm after processed, wherein the catalyst comprises at least one oxide carrier selected from TiO2, Al2O3, SiO2 or ZrO2 and at least one metal or oxide carried on the oxide carrier and selected from Pt, Pd, Ru, Ir or Rh in parts by weight. The problem is nicely solved with the technical scheme, and the catalysis wet-type oxidation treatment method for cyanogen-containing wastewater can be used in the industrial treatment of cyanogen-containing industrial wastewater.

The oxygen scavenging system of the subject invention contemplates a composition, system and appurtenant methodology for substantially eliminating elemental oxygen from packaged oxygen sensitive products. The composition or scavenging agent includes an oxidoreductase enzyme, a suitable energy source or substrate for the enzyme, and a buffer. The composition binds oxygen when exposed to moisture, thereby reducing the level of oxygen in a closed (e.g., sealed) space such as a food package or the like. More particularly and preferably, the composition includes glucose oxidase in an amount of between 1 and 100 activity units (U) per gram, catalase in an amount of between 1 and 300 activity units (U) per gram, dextrose in an amount of between about 20 and 99 percent by weight, and sodium bicarbonate in an amount of between about 1 and 80 percent by weight.

The invention relates to a satellite-borne K-band phased array antenna circularly-polarized waveguide radiation array, which can radiate microwave signals to the space, and can receive microwave signals from the space. The satellite-borne K-band phased array antenna circularly-polarized waveguide radiation array is composed of a plurality of antenna units, wherein each antenna unit comprises a matching diaphragm, an SMP coaxial feed socket, a square waveguide radiator, a waveguide-to-coaxial adapter, an SMP feed socket feed end, an impedance matching device and a circular polarizer, and adopts an integral design; and the matching diaphragms are adopted among the antenna units for deploying coupling characteristics among radiating units, so as to achieve more ideal standing wave performance and radiation characteristics. The satellite-borne K-band phased array antenna circularly-polarized waveguide radiation array is simple and reliable in structure, has the advantages of two-directional plus / minus 40-degree wide angle scanning, low sweep gain drop and excellent circular polarization characteristics, and satisfies the requirements for an phased-array antenna of satellite-borne intersatellite and satellite-to-ground communication. The antenna adopts an aluminum structure, and performances of the antenna are not affected by factors such as elemental oxygen corrosion and ultraviolet radiation of the on-orbit space environment.

The invention relates to a preparation method for PBO fiber, in particular to a preparation method for binary grafted modified PBO fiber, and aims to solve the problem that the conventional PBO fiber has poor infiltration with matrix resin as the surface is inert and the fiber mechanical property is reduced as PBO fiber molecular chains break due to elemental oxygen. The preparation method comprises the following steps: 1, functionally processing graphene oxide; 2, performing activating treatment on PBO fiber; adding the PBO fiber into a lithium aluminum hydride-diethyl ether saturated solution to be subjected to hydroxyl functional processing; 4, grafting APTMS on the surface of the PBO fiber; 5, binarily grafting the graphene oxide on the surface of the PBO fiber. According to the invention, both the APTMS and the graphene oxide are grafted on the surface of the PBO fiber through a chemical grafting method, so that the infiltration of the PBO fiber is improved, and the binary grafted PBO fiber can keep higher tensile strength under the impact of elemental oxygen. The preparation method is mainly applied to the preparation of PBO fiber.

The invention relates to a method for preparing an elemental oxygen-resistant polyimide material by an in-situ hydrolysis method, the prepared polyimide material is composed of SiO2 and polyimide, andhas structural characteristic of compact SiO2 layer @(SiO2 / PI interpenetrating network layer) @(SiO2 particle / PI hybrid layer), the polyimide material has a three-stage anti-atomic oxygen function, and is excellent in atomic oxygen-resistant performance. The preparation method of the material comprises the following steps: a silicon compound is added to a polyamic acid solution, the materials arestirred to form a uniform mixed solution, and then subjected to casting film formation, pre-cyclization and heat-induced migration aggregation, in-situ hydrolysis and high-temperature heat treatment,and finally the elemental oxygen-resistant polyimide material is obtained. The method of the invention has simple implementation process and convenient conditions, and is suitable for polyimide of all systems, and the obtained elemental oxygen-resistant polyimide film layer material has the advantages of compact structure, no cracking and excellent interfacial bonding property.

The invention discloses a method for preparing canthaxanthin through oxidation.The method includes the steps that beta-carotene serves as the raw material, sulfur oxide urea or urea peroxide serves as an oxidizing agent, an oxidizing reaction is conducted, and the canthaxanthin is obtained.The method has the advantages that operation is simple, the reaction is stable, and the trigger condition is mild; the oxidizing agents including sulfur oxide urea and urea peroxide can be decomposed into H2O2 and elemental oxygen in solvent, O2 is released slowly, the content of active oxygen is high, stability is high, the utility of time is long, no side effect exists, no toxin or public hazard exists, and it is beneficial to achieve industrialized clean production.

A process for oligomerizing the olefins present in a Fischer-Tropsch derived condensate containing a mixture of olefins and oxygenates and boiling in the range of diesel which comprises (a) removing substantially all of the oxygenates present in the Fischer-Tropsch condensate; (b) contacting the Fischer-Tropsch derived condensate having less than 100 ppmw elemental oxygen with an ionic liquid catalyst in an oligomerization zone under oligomerization reaction conditions; and (c) recovering from the oligomerization zone a Fischer-Tropsch derived product having molecules characterized by a higher average molecular weight and increased branching as compared to the Fischer-Tropsch derived condensate.

A fluorophor comprising, as a main component, an α-type sialon crystal which contains at least an A element (wherein A represents one or more elements selected from among Mn, Ce, Pr, Nd, Sm, Eu, Tb, Dy, Er, Tm and Yb), an M element (wherein M represents one or more elements selected from among Li, Na, Mg, Ca, Y, La, Gd and Lu), Si, Al, oxygen and nitrogen, and is represented by the general formula: (Mx, Ay)(Si12−(m+n)Alm+n)(OnN16−n) (1) m=δM×x+δA×y (2) 0.2≦x≦2.4 (3) 0.001≦y≦0.4 (4) and 0.5×m<n≦4 (5). The fluorophor is reduced in the lowering of brightness, and is useful for a white color LED and the like.

The invention relates to a method for decomposing pesticide residues on fruits and vegetables and disinfecting tableware through hydroxyl radical and a device adopting the method, and mainly aims to solve the technical problems that the conventional fruit, vegetable, tableware and medical instrument disinfection method and the conventional fruit, vegetable, tableware and medical instrument disinfection device are low in pesticide residue removal efficiency, and poor in innocent treatment effect and medical instrument disinfection effect. According to the technical scheme disclosed by the invention, the method comprises the following steps of releasing ozone into water, irradiating the water through a UVC 253.7nm mercury lamp and ultraviolet lamp module to generate singlet elemental oxygen for blowing up the water to generate a high-concentration hydroxyl radical aqueous solution for disinfecting, detoxifying and purifying the pesticide residues on the fruits, the vegetables and fresh food or disinfecting tableware and medicament instruments. The device disclosed by the invention comprises an ozone generator, an impeller, an aerator, a shell, the ultraviolet lamp module, an ultrasonic device, a water outlet, a water inlet, a water pump, an oxygen outlet, a sodium peroxide generator, a sodium peroxide collection tank, a sodium peroxide discharging pipe, a hanging mechanism, and a closing cover.

A poly urethane (PU) or thermal receiver unit (TPU) film with an anti-drag micro-groove structure for an airship skin relates to an airship skin material and solves the problems in the existing stratosphere airship skins of being poor in weather resistance, large in drag and poor in thermal insulation. The PU or TPU film with the anti-drag micro-groove structure for the airship skin comprises a V-shaped groove on the surface, and the V-shaped groove forms alternating and transparent grooves on the surface of the PU or TPU film. An Al layer or TiO2 protecting layer is further arranged on the surface of the PU or TPU film. The microgroove with high resolution and a high depth-to-width ratio structure is arranged on the surface of the film, the grooves are obvious and in order and are prominent in anti-drag effect, and the protecting layer on the surface of the film can reflect solar radiation, absorbs ultraviolet light, shields elemental oxygen and improves weather resistance. The PU or TPU film is applied to the airship skin material.

The invention discloses a preparation method of a TiO2 plated type PU (polyurethane) or TPU (thermoplastic polyurethane) film anti-drag micro groove for an airship skin, relating to a preparation method of an airship skin material. The invention solves the problems of poor weather fastness, large resistance, poor thermal insulation, low load and large volume of the traditional stratosphere airship skin. The preparation method comprises the steps of: preparing a TiO2 sol precursor solution; preparing an Al template, cleaning the template, and coating a release agent; ultrasonically cleaning a film, impressing under the conditions of 135-140 DEG C and 15-20kg / cm<2>, and preserving the pressure for 2-3h; and coating a TiO2 coating on the impressed film. The prepared TiO2 plated type PU or TPU film anti-drag micro groove has the advantages of remarkable grooves, good regularity and remarkable anti-drag effects, and plays important roles in reducing the volume of an airship, increasing the load and prolonging the air residing time; and the TiO2 coating has the function of more strongly absorbing ultraviolet, and can shield elemental oxygen, so that damage of the ultraviolet to the film is reduced, and the weather resistance is increased. The preparation method is used for preparing the airship skin material.

A selective hydrocatalyst for the alkine and diolefin in C2-10 fraction is composed of a inertial carrier chosen from silicon carbide, talc powder and fire-proof earth and a coated alumina layer containing Pd, Ag, Bi and at least one of Cu, Zn, alkali metal, AE metal and RE element. Its preparing process is also disclosed.

The present invention relates to a 3D morphology CeO2 / TiO2 catalyst preparation method, which comprises: adding urea, CTAB and cerium nitrate to ethylene glycol, dissolving, adding a liquid phase titanium source to the obtained solution to form a homogeneous solution, adding deionized water in a dropwise manner, and stirring to form a transparent gel; carrying out hydrothermal treatment on the transparent gel, washing, filtering, and drying; and roasting to obtain the 3D morphology CeO2 / TiO2 catalyst. The invention further relates to the product obtained by the method and applications thereof. According to the present invention, the pH value of the reaction system is self-regulated by slowly decomposing urea during the hydrothermal process, such that the doping of the rare earth element cerium oxide in the titanium dioxide is achieved; and the preparation method has advantages of simple process, convenient procedure, wide parameter adjustment range, strong repeatability and low cost,and the prepared titanium dioxide photocatalyst has strong response under visible light conditions.

The invention relates to a catalyst for preparing maleic anhydride from n-butane through oxidation. The catalyst mainly overcomes the problem of low catalytic activity in the prior art. According to the invention, three elements consisting of vanadium, phosphorus and oxygen are used as the main body of the catalyst, and a certain amount of a metal additive is cooperatively used. The catalyst comprises, by weight, 26 to 35% of elemental vanadium, 14 to 20% of elemental phosphorus, 30 to 50% of elemental oxygen and 0.02 to 7% of the metal additive. The catalyst is subjected to constant-temperature constant-humidity treatment, doping of a pore forming agent and secondary molding, so the catalysis performance and strength of the catalyst are improved, and the catalyst is applicable to the field of preparation of maleic anhydride from n-butane through oxidation.

The invention relates to a wet oxidation treatment method for wastewater catalysis, and mainly solves the problem that high molecular polymer in wastewater influence the effect of catalytic wet oxidation treatment for wastewater. According to the invention, the high concentration organic wastewater and gas containing elemental oxygen contact with a catalyst under the conditions of reaction temperature of 230-290 DEG C, reaction pressure of 4-10 MPa and liquid space velocity of 0.5-2.5 / h; the removal rate of COD is higher than 95%, the degradation rate of the polymer is higher than 99%; in the catalyst, pore volume larger than 3 nm accounts for 30-80% of the pore volume, micropore volume less than 1 nm accounts for 10-40% of the pore volume, and the pore volume is 0.05-0.3 ml / g. The technical scheme solves the problem, and can be used for treatment of industrial organic wastewater.

The invention discloses a space multi-factor environment comprehensive protection material. Liquid metal is mixed to a three-dimensional graphene block and permeates based on the capillary effect, the liquid metal is dispersed through ultrasound, and the protection material is formed through cooling solidification, or three-dimensional graphene and metal powder are well mixed, and the protection material is manufactured through solidification forming treatment by means of a cementation or sintering or high-temperature method. The metal covers 1%-10% of the total weight of the metal and the three-dimensional graphene. The invention also discloses a protection structure. Compared with the prior art, the strength of the space multi-factor environment comprehensive protection structure is improved by more than 200 times, and the mass of the protection structure can be at least reduced by 90% or more to protect the same space debris. Meanwhile, the protection structure has the shielding effect on electrons, protons, heavy ions, neutrons and elemental oxygen.

The invention relates to a phosphorus-doped LaCoO3 bifunctional catalyst, and a preparation method and application thereof. The preparation method comprises the following steps: S1, mixing a LaCoO3 perovskite material with red phosphorus, and carrying out high-energy ball milling in an inert atmosphere so as to obtain a phosphorus-doped LaCoO3 perovskite material; and S2, adding a dispersant intothe phosphorus-doped LaCoO3 perovskite material, and carrying out ball milling and drying so as to obtain the phosphorus-doped LaCoO3 bifunctional catalyst. According to the invention, the high-energyball milling method is employed, and elemental oxygen in LaCoO3 is replaced through phosphorus doping, so the prepared phosphorus-doped LaCoO3 bifunctional catalyst has uniformly distributed elementary phosphorus, fine crystal grain and large specific surface area, is greatly improved in catalytic activity in an alkaline solution, shows excellent ORR and OER catalytic performance and high stability, and has great application prospects as a bifunctional catalyst in the field of electrocatalysis.

The invention discloses lubricating grease for a space aircraft and a preparation method thereof. The product comprises the following components in percentage by weight: 50-90% of basic oil, 2-20% of an anti-friction antiwear agent, 0.05-1.5% of a dispersant, 0.02-2% of an antioxidant, 1-10% of a thickening adjustor, 0.2-10% of a synergic lubricant and the balance of in-situ saponified compound lithium-based grease compounded. The product can reduce frictional wear of a typical friction pair of the space aircraft and prolong the service life of the aircraft in a space environment with the characteristics of high vacuum degree, strong radiation, elemental oxygen, high and low temperatures and the like. The product is good in lubricating performance, stable in quality and simple and convenient in preparation process, and has important application value in the lubricating field of the space aircrafts such as spacecrafts, artificial satellites and the like.

The invention provides a preparation method for a zinc oxide nanowire-modified PBO fiber, which relates to a modification method for a PBO fiber. The objective of the invention is to overcome the problems of poor wettability on a matrix resin caused by smooth surfaces of PBO fibers and breakage of molecular chains and decrease of mechanical properties of the PBO fibers initiated by elemental oxygen in the prior art. The method comprises the following steps: 1, activating a PBO fiber; 2, preparing a zinc acetate solution; 3, preparing a sodium hydroxide solution; 4, preparing a zinc oxide seed solution; 5, carrying out stirring and drying; and 6, allowing zinc oxide nanowires to grow. The method has the following advantages: 1, the zinc oxide nanowires uniformly and densely grow on the surface of the PBO fiber; 2, interfacial shear strength of a reinforced epoxy resin after modification of the PBO fiber is increased by 20 to 41% compared with that of the reinforced epoxy resin before modification; and 3, in same elemental oxygen exposure time, the tensile strength retention rate of the zinc oxide nanowire-modified PBO fiber is 10 to 21% higher than that of the PBO fiber. With the method, the zinc oxide nanowire-modified PBO fiber is prepared.

An electrically driven oxygen separation element and method in which an oxygen containing feed stream is passed through a passageway of a composite structure having a current collector defining the passageway, a cathode electrode to ionize the oxygen, an electrolyte to transport oxygen ions to an anode to recombine into elemental oxygen. An elongated element, preferably formed of an irregular mesh of wire having loops in contact with the current collector can be provided to disrupt the flow directly adjacent the current collector and to help distribute the electrical current along the length of the current collector.

The invention relates to a method for preparing an inorganic nanoparticle / aromatic polyimide composite film and the composite film prepared according to the method. The method comprises the followingsteps: complexing an aromatic polyimide film containing an imidazole structure and heavy metal ions; fluorating the aromatic polyimide film of which the surface is complexed with the heavy metal ionsto obtain a polyimide film of which the surface contains fluorocarbon bonds; introducing silicon hydroxyl to the polyimide film through the fluorocarbon bonds to form a polyimide film of which the surface contains silicon hydroxyl; introducing an inorganic nanoparticle layer through the silicon hydroxyl to obtain the composite film. With the adoption of the method, the selectivity of the fluorating reaction can be improved, so that the content of C-F bond on the surface of the polyimide film is increased, and chain scission of polyimide macromolecules can be avoided; the composite film is highin stem grafting density, elemental oxygen resistance and corona resistance.