51 results about "Oxygen contamination" patented technology

This invention utilizes a novel method and set of operating conditions to efficiently and economically process a potentially very fouling hydrocarbon feedstock. A multi-stage catalytic process for the upgrading of coal pyrolysis oils is developed. Coal Pyrolysis Oils are highly aromatic, olefinic, unstable, contain objectionable sulfur, nitrogen, and oxygen contaminants, and,may contain coal solids which will plug fixed-bed reactors. The pyrolysis oil is fed with hydrogen to a multi-stage ebullated-bed hydrotreater and hydrocracker containing a hydrogenation or hydrocracking catalyst to first stabilize the feed at low temperature and is then fed to downstream reactor(s) at higher temperatures to further treat and hydrocrack the pyrolysis oils to a more valuable syncrude or to finished distillate products. The relatively high heat of reaction is used to provide the energy necessary to increase the temperature of the subsequent stage thus eliminating the need for additional external heat input. A refined heavy oil product stream is recycled to the fresh feed to minimize feedstock fouling of heat exchangers and feed heaters.

A ruthenium electrode with a low amount of oxygen contamination and high thermal stability is formed by a chemical vapor deposition method. In the chemical vapor deposition method using an organoruthenium compound as a precursor, the introduction of an oxidation gas is limited to when the precursor is supplying, and the reaction is allowed to occur at a low oxygen partial pressure. Consequently, it is possible to form a ruthenium film with a low amount of oxygen contamination. Further, after formation of the ruthenium film, annealing at not less than the formation temperature is performed, thereby forming a ruthenium film with high thermal stability.

The present invention discloses a high-pressure vessel of large size formed with a limited size of e.g. Ni—Cr based precipitation hardenable superalloy. The vessel may have multiple zones.For instance, the high-pressure vessel may be divided into at least three regions with flow-restricting devices and the crystallization region is set higher temperature than other regions. This structure helps to reliably seal both ends of the high-pressure vessel, and at the same time, may help to greatly reduce unfavorable precipitation of group III nitride at the bottom of the vessel.This invention also discloses novel procedures to grow crystals with improved purity, transparency and structural quality. Alkali metal-containing mineralizers are charged with minimum exposure to oxygen and moisture until the high-pressure vessel is filled with ammonia. Several methods to reduce oxygen contamination during the process steps are presented. Also, back etching of seed crystals and a new temperature ramping scheme to improve structural quality are disclosed.

The invention belongs to the technical field of environmental monitoring and relates to an atmospheric pollution tracing system. The system comprises an emission source input module used for inputtingemission data, an initialization module used for setting the initial concentration of pollutants, an atmospheric chemistry module used for simulating a chemical process in an air mass movement process according to the input emission data, an atmospheric physical module used for inputting meteorological parameters and simulating a physical process in the air mass movement process according to themeteorological parameters, and a result output module used for outputting the concentration of the pollutants and the rate of the atmospheric chemical reaction process, quantifying the contribution ofregion transmission and local generation to the O3 concentration of a target region, and quantifying the contribution of different chemical processes to the O3 concentration of the target region. According to the system, atmospheric physical and chemical processes are comprehensively considered, the evolution of the pollutant concentration and the chemical reaction rate of gas mass in the movement process in the space-time scale is restored, a discharge area causing ozone pollution in the target area is accurately located, a precursor and a discharge department are optimally controlled, and scientific support is provided for formulating the control measures of the ozone pollution in the target area.

The invention relates to a process for removing oxygen from liquid argon using a TSA (temperature swing adsorption) cyclical process that includes cooling an adsorbent bed to sustain argon in a liquid phase; supplying the adsorbent bed with a liquid argon feed that is contaminated with oxygen and purifying the liquid argon thereby producing an argon product with less oxygen contaminant than is in the initial liquid argon feed; draining the purified residual liquid argon product and sending purified argon out of the adsorbent bed. Regeneration of specially prepared adsorbent allows the adsorbent bed to warm up to temperatures that preclude the use of requiring either vacuum or evacuation of adsorbent from the bed.

Disclosed is a method and reactor system for converting oxygenate and / or olefin contaminants in a methanol to olefin reactor system product effluent to hydrocarbons, including paraffin compounds, preferably over a sulphided catalyst of the type Nickel or Cobalt combined with Molybdenum or Tungsten. In one embodiment, the oxygenate-containing stream to be hydrogenated comprises one or more of the following streams, alone or in combination: a quench tower bottoms stream, a water absorption unit bottoms stream, a C4+ stream, and / or a C5+ stream.

In a process for producing para-xylene, a feed comprising a mixture of xylene isomers, olefinic unsaturated contaminants and oxygenate contaminants is supplied to a para-xylene recovery unit to recover para-xylene and produce a para-xylene depleted residual stream. The para-xylene depleted residual stream is then contacted with a xylene isomerization catalyst in a xylene isomerization zone under liquid phase conditions effective to isomerize xylenes and produce an isomerized product having a higher para-xylene content than the para-xylene depleted residual stream. The isomerized product is then recycled to the para-xylene recovery unit. At least one of the feed, the para-xylene depleted residual stream and the isomerized product is contacted with a solid acid catalyst in a treatment zone under conditions effective to reduce the level of olefinic unsaturated contaminants and oxygenate contaminants therein and produce a treated stream.

A process chamber for the coating of substrates with silanes with a double door seal. The double door seal may have a cavity between the seals which may be evacuated or pressurized, including with an inert gas. An apparatus for the coating of substrates comprising a process oven, a gas plasma subsystem, a metered chemical withdrawal subsystem, a vacuum subsystem, a vaporization subsystem, and a double door seal. A process oven utilizing a double sealed door with pressurized inert gas between the seals to reduce oxygen contamination and risks associated with silane processes.

A process is presented for the removal of oxygen from a hydrocarbon stream. The oxygen can react and cause polymerization of the hydrocarbons when the hydrocarbon stream is heated. Controlling the removal of the oxygen from the hydrocarbon stream produces a hydrocarbon stream that is substantially free of oxygen and has a reduced activity for generating undesired compounds.

A system for use in monitoring, measuring, recording, computing and transmitting the oxygen levels and identification of oxygen contamination within an aircraft telescopic landing gear strut. An oxygen sensor is mounted in relation to each of the landing gear struts as to monitor, recognize, measure and record the identification of oxygen within the telescopic landing gear struts. The amount of oxygen within each landing gear strut is measured and recorded and downloaded to the responsible aircraft maintenance department. By detecting the amount of oxygen in a strut, steps can be taken to purge the gas from the strut to minimize corrosion of strut components and to prevent internal combustion of the gas and oil in the strut.

The present invention is a closure (1) suitable for closing a container containing a first product, said closure being an assembly of less than four independent pieces, and having external side walls (3), a top wall (4), and an internal skirt (5) extending downwardly inside the side walls (3) from the top wall (4), characterized in that : (i) the internal skirt (5) comprises an opening disposed in the top wall (4) of the closure, said opening being closed by a membrane, so as to define at least one compartment to store a second product separately from said first product, and (ii) the membrane (11) closing the top wall opening is made of an oxygen-barrier material, so that said compartment (6) is free of oxygen contamination from ambient air when said closure (1) is screwed onto the neck (2) of said container.

The invention belongs to the field of water pollution treatment and control, and relates to an aeration waterwheel for water body especially city rivers. The aeration waterwheel is characterized in that the aeration waterwheel comprises a waterwheel rotation shaft, a waterwheel blade and a container, the waterwheel blades is fixedly disposed on the waterwheel rotation shaft, and the tail end of the waterwheel blade is provided with the container. The aeration waterwheel rotates under the driven effect of flowing water body, the container is taken to a position under the liquid level and releases air, and then is taken to a position above the liquid level and holds air, and thus the aeration process of the waterwheel is finished. The aeration waterwheel is capable of increasing dissolved oxygen content in water body and reducing oxygen-consumed pollutants in water body, is pushed by means of water body, automatically runs, consumes zero or a little of electricity, and is low in running cost.

The invention discloses a dynamic decision-making method and device for ozone pollution prevention and control. According to the method and the device, an ozone pollution prevention and control dynamic decision-making technical route of monitoring and early warning, ozone source analysis, decision-making evaluation and standard reaching and performance is realized. And establishing a measure library according to the emission list, and continuously evaluating and optimizing the measure library through the effect of scene simulation. The local list and the regional list are fused to realize refined and quick source tracing of ozone and precursors thereof; multi-dimensional comprehensive source analysis of models, observations and lists is realized, and key emission areas and key pollution industries are accurately judged; and quick evaluation and dynamic optimization of ozone pollution standard reaching planning are realized. By means of three-dimensional monitoring, emission lists, numerical simulation, emergency emission reduction technologies and the like, ozone pollution sources are subjected to multi-dimensional analysis, source contributions of local areas, surrounding areas and pollution industries are quantitatively analyzed, and key causes of urban ozone pollution are recognized.

The invention discloses evaporation equipment. The evaporation equipment comprises a main cavity, a vacuumizing device connected with the main cavity, a control device and at least one evaporation station, and further comprises at least one storage cavity and a crucible replacing device which is capable of being controlled by the control device to hoist and clamp crucibles and transfer the crucibles between the evaporation stations and the storage cavities, wherein the storage cavities communicate with the internal space of the main cavity through first through holes, the first through holes are provided with isolation sealing pieces which can be controlled by the control device to be shifted so as to enable the first through holes to be opened or closed, and the evaporation positions are located on the inner side of the bottom of the main cavity and are provided with heating devices; and the crucible replacing device comprises a telescopic lifting type rotary hoisting mechanism, and the telescopic lifting type rotary hoisting mechanism is connected with the bottom surface of the main cavity and is located in the inner space of the main cavity. According to the evaporation equipment, the plurality of storage cavities are arranged, the number of standby crucibles is increased, so that the number of times of damaging the vacuum environment of the main cavity is reduced, meanwhile, water pollution and oxygen pollution brought by the operation to the main cavity are reduced, and the production efficiency of an OLED is improved.

The invention relates to the technical field of semiconductor material preparation, and in particular, relates to a gallium arsenide-doped single crystal growth process; oxygen released in the environment and in the high-temperature process of arsenic, gallium and a quartz tube is absorbed by adding materials with high oxygen reaction activity in two links of polycrystalline synthesis and single crystal growth, and oxygen pairs are preventd from entering polycrystals and single crystals, so the influence of oxygen pollution on the material performance is greatly reduced. Si doping is carried out in the polycrystalline synthesis process, silicon enters gallium arsenide and performs effective occupying, boron oxide does not exist, and polycrystalline synthesis does not cause B to pollute polycrystalline. C, Al or Ti is placed in a quartz tube to absorb oxygen in the quartz tube in the single crystal growth process, the oxygen content in the single crystal is controlled, and polycrystalline doped impurities are not added any more. During single crystal growth, boron oxide is added to improve the single crystal rate and realize selective adsorption of impurities. The desired crystal properties are achieved.

The invention discloses a novel graphite phase carbon nitride polymer material, a preparation method and applications thereof, and belongs to the technical field of functional materials, wherein the carbon nitride material has a layered structure, has good crystallinity, and has a chemical formula of g-C3N3, and the polymer material can be peeled into a single-layer or few-layer two-dimensional material through a chemical or mechanical method. The preparation method of the graphite phase carbon nitride polymer comprises: under inert gas protection or air, using an appropriate amount of a monomer as a reactant, cutting to obtain a metal sheet with an appropriate size, ultrasonically cleaning with water and an organic solvent, drying, adding to a reactor, properly placing the metal sheet, heating to a temperature of 180-300 DEG C, maintaining for not more than 48 h, and cooling, wherein the sheet-like material loaded on the surface of the metal sheet is the CN polymer. According to the present invention, the preparation method has advantages of simple steps, high yield and cheap raw materials; and the obtained material can be used for a variety of purposes such as electrocatalytic hydrogen evolution, photocatalytic hydrogen evolution, water production and oxygen production through photolysis of water, decomposition of pollutants, and the like.

The present invention is a closure (1) suitable for closing a container containing a first product, said closure being an assembly of less than four independent pieces, and having external side walls (3), a top wall (4), and an internal skirt (5) extending downwardly inside the side walls (3) from the top wall (4), characterized in that: (i) the internal skirt (5) comprises an opening disposed in the top wall (4) of the closure, said opening being closed by a membrane, so as to define at least one compartment to store a second product separately from said first product, and (ii) the membrane (11) closing the top wall opening is made of an oxygen-barrier material, so that said compartment (6) is free of oxygen contamination from ambient air when said closure (1) is screwed onto the neck (2) of said container.

The invention provides a biogas slurry purification device and purification method, and relates to the technical field of biogas slurry treatment in biogas engineering. The biogas slurry purificationdevice comprises an aeration device, wherein the aeration device comprises a tank body and a fan arranged at the lower part in the tank body, biogas slurry flows into the tank body, and the fan generates flowing gas to intermittently aerate the biogas slurry. A filtering device comprises a conveying belt and filtering cloth which is wound on the surface of the conveying belt and moves along with the conveying belt, a slurry feeding pipe is arranged above the front end of the conveying belt, and a hopper for recycling filtered biogas slurry is arranged below the conveying belt. Biogas slurry aerated by the aeration device flows onto the filtering cloth through the feeding pipe, the biogas slurry flows into the hopper through the filtering cloth, filter residues move backwards along with thefiltering cloth, and the filtering device is located in a vacuum environment. According to the biogas slurry purification device and purification method provided by the invention, the content of aerobic pollutants is reduced through aeration, solid particles are filtered, the viscosity of biogas slurry is reduced, and the gas production rate is increased.

The invention belongs to the technical field of refractory materials, and particularly relates to a calcium aluminate fully-combined tin bath top cover brick for a float glass tin bath and a preparation method of the calcium aluminate fully-combined tin bath top cover brick. The brick consists of a supporting brick and a combined brick, wherein the supporting brick consists of a bottom layer calcium aluminate hot face brick and an upper layer light mullite heat insulating brick; the combined brick is of a four-layer structure and is composed of bottom-layer calcium aluminate hot face bricks, light mullite heat preservation bricks on the second layer and the third layer and a hard calcium silicate board on the top layer. The calcium aluminate hot face brick is composed of synthetic calciumaluminate aggregate, calcium aluminate cement, calcium aluminate fine powder, mullite fine powder and micro silicon powder. The calcium aluminate fully-combined molten tin bath top cover brick for thefloat glass tin bath is stable in structure, precise in size, high in thermal shock resistance, easy to install and maintain and good in heat preservation performance, the air tightness of the wholemolten tin bath is improved, temperature control is accurate, oxygen pollution is reduced, drippings on the top of the molten tin bath are reduced, and the yield of glass is increased by 5% or above;and profits of glass enterprises are effectively increased.

The invention relates to an integrated treatment device for membrane filtration concentrated liquor of landfill leachate. The integrated treatment device is composed of a dielectric barrier dischargeplasma generation section located at the upper section of the device and a synergistic ozone pollutant reaction section located at the lower section of the device. The upper section of the device is provided with a hydrogen inlet, an insulating partition plate is inserted between the upper section and the lower section, and a plasma hydrogen inlet conduit is arranged. An exhaust port, a water sample outlet, an inlet and an ozone and oxygen inlet are formed in the lower section of the device. Circulating water used for cooling and connecting grounding electrodes is injected between a reactor inner cylinder and a reactor outer cylinder. A discharge electrode is inserted into the reactor inner cylinder. A microporous aeration head is arranged at the bottom of the reactor inner cylinder. Garbage membrane filtration concentrate enters the inner cylinder, ozone and oxygen mixed gas enters the inner cylinder through microbubble aeration, plasma hydrogen is generated through dielectric barrierdischarge and introduced below the liquid level of the garbage membrane filtration concentrate and reacts with oxygen to generate hydrogen peroxide in situ, enhanced oxidation treatment of organic matter is achieved, and the degradation capacity is improved.

The invention discloses a city and town river and lake water ecological restoration method based on a new restoration mode of mud first and water second. The method is used for city and town river and lake bottom mud in-situ restoration and micro-ecological reconstruction, and comprises the following steps: synchronous reduction of anaerobic bottom mud carbon, nitrogen and sulfur pollutants is realized through SedCaN particles, based on microbial acclimatization and spreading, in-situ regulation of a bottom mud microbial community structure is realized, and construction of an aerobic microbial ecosystem is realized. According to the invention, the river and lake pollution in-situ treatment mode and method have the advantages of low energy consumption, low cost, higher efficiency, higher comprehensiveness and higher safety, can realize an in-situ treatment target of construction of a water body-bottom mud healthy ecological system and collaborative reduction of pollutants, can remove 95% of oxygen consumption pollution such as bottom mud sulfide and the like within 15 days, basically eliminates black and odorous bottom mud, solves the technical bottleneck that the natural environment of the polluted bottom mud is difficult to quickly recover by an aerobic process, shortens the construction period by more than 30 days, and can save the cost by more than 40-50%compared with a desilting scheme.

The invention discloses an ozone pollution control sensitive area forecasting method, a storage medium and a terminal, and the method comprises the steps: building a control area group, and generatinga boundary file of a corresponding area; determining a pollution discharge sub-list of an area corresponding to each boundary file, and reducing a single precursor pollutant in the pollution discharge sub-list to generate a sensitive discharge list corresponding to each reduced precursor pollutant; acquiring atmospheric circulation forecast data, and inputting the sensitive emission list, the original pollution emission list and the atmospheric circulation forecast data into an air quality model, so that prediction of original pollutant concentration data and pollutant concentration data after reduction of a single precursor pollutant is realized; the influence of the specific precursor pollutants in the corresponding areas on the concentrations of the specific types of pollutants can beaccurately obtained, reference is provided for precursor pollutant management and control in the specific pollution periods of the corresponding management and control areas, key management and control areas and management and control directions are clear, the management and control cost is low, the management and control performance is good, and high practicability is achieved.

The present invention relates to a semiconductor material wet surface process passivation method, belonging to the field of semiconductor material technology. Known technologies in the field are difficult to employ a wet process passivation means to maintain long-term stability of a passivation effect while effectively reducing a material surface state. A CH3[CH2]19SH is employed as a sulfide passivation solution and reacts with semiconductor materials in a special condition so that oxygen contamination at the surfaces of the semiconductor materials can be effectively removed, and a molecularlayer of a mercaptan with a long carbon chain is subjected to self-assembly at the surfaces of the semiconductor materials to realize stable passivation protection of the surfaces. The method providedby the invention is little in chemical pollution, simple to operate, low in cost and obvious in passivation effect, and can be used for surface process in a semiconductor device preparation process.

Methods and systems relate to an oxy-boiler used to generate steam injected into a well for assisting recovery of hydrocarbons. Operating conditions of a burner for the oxy-boiler limits oxygen contamination in a resulting flue gas for carbon dioxide recovery and limits size of the oxy-boiler, which may thus be located proximate the well rather at a central processing facility. In contrast to a direct steam generation approach where resulting carbon dioxide is mixed with steam, the oxy-boiler also enables selection of a desired level of carbon dioxide injection, which may be provided with the flue gas that may be exhausted from the oxy-boiler at an injection pressure.

The invention discloses an ozone pollution tracing method, which can realize real-time automatic monitoring of ozone pollution, not only can reduce the labor intensity of manual sampling, but also can improve the ozone pollution tracing efficiency, and has multiple advantages of actual data monitoring and numerical theoretical analysis. The method effectively improves the scientificity and efficiency of ozone pollution traceability, greatly improves the operability of ozone pollution traceability, achieves the fastest traceability effect through a simple and scientific method, efficiently and quickly screens out the cause of ozone pollution high value, can be well suitable for the cause analysis of ozone high value of regional or urban automatic air stations, and has a wide application prospect. The method is suitable for engineering application.