60 results about "Oxygen scavenger" patented technology

Disclosed is an oxygen scavenger composition including iron powder, activated carbon, water, a halide of an alkaline earth metal, and an alkaline substance, in which a content of the activated carbon is 20 parts by mass or more and 40 parts by mass or less with respect to 100 parts by mass of a content of the iron powder, a content of the water is 230 parts by mass or more and 370 parts by mass or less with respect to 100 parts by mass of the content of the activated carbon, and a content of the halide of the alkaline earth metal is 50 parts by mass or more and 65 parts by mass or less with respect to 100 parts by mass of the content of the water.

The invention provides a soilless phase reservoir protection water-based drilling fluid as well as a preparation method and application thereof, and belongs to the technical field of drilling fluids. The drilling fluid is prepared from the following raw materials in parts by mass: 100 parts of water, 0.2-0.4 part of a first pH regulator, 1-3 parts of a deoxidant, 0.1-0.4 part of a tackifying and shear strength improving agent, 2-4 parts of a filtrate reducer, 4-6 parts of magnesium-aluminum hydrotalcite, 4-6 parts of micro-nano aluminum oxide, 4-6 parts of superfine calcium carbonate, 4-6 parts of a lubricant, 1-2 parts of a corrosion inhibitor and 70-660 parts of an inorganic salt weighting agent. The drilling fluid disclosed by the invention is excellent in high-temperature resistance, good in rheological property and excellent in filtrate loss reduction performance; the drilling fluid disclosed by the invention can be prepared into saturated CaCl2 and saturated CaBr2 systems, does not contain barite and clay, is high in mud cake acid solubility, has permeability recovery of more than 72% after plugging, is good in reservoir protection, and has potential of on-site large-scale application.

Electrolyte for a battery cell, battery cell for a vehicle, and method for forming an electrolyte. The electrolyte comprises a base electrolyte. The base electrolyte comprises a primary lithium salt, a carbonate solvent, and an organic sulfate additive. The electrolyte also comprises lithium bis(fluorosulfonyl)imide (LiFSI), present in the range of 0.1 wt% to 1 wt% of the total weight of the electrolyte, a phosphite ester oxygen scavenger, present in the range of 0.01 wt% to 1.5 wt% of the total weight of the electrolyte, and fluoroethylene carbonate, present in the range of 0.5 wt% to 2.0 wt% of the total weight of the electrolyte. The base electrolyte is the remaining wt% of the total weight of the electrolyte, and the total wt% of the electrolyte is 100 wt%.

The invention discloses a preparation method of nitrile rubber, which comprises the following steps: (1) adding water, a vinyl nitrile monomer and an ionizable initiator into a polymerization kettle, stirring, heating, and cooling after the reaction is finished to obtain a reaction compound with an emulsification effect; (2) in the polymerization reaction, adding water, a cosolvent and the reaction compound obtained in the step (1), introducing nitrogen for replacement, then adding a deoxidant, a chain transfer agent with a surface activity function, conjugated diene and a vinyl nitrile monomer, heating, adding an ionizable initiator, and measuring the conversion rate of the reaction monomer in each period of time; and when the conversion rate is greater than 70%, adding a terminator and an anti-aging agent, stirring, degassing, adding a coagulant, flushing and drying to obtain the nitrile rubber. According to the preparation method, soap-free polymerization of nitrile rubber can be realized, the complexity of a post-treatment process is reduced, the environmental friendliness and economic benefits are improved, and the problem that the cleanliness of a product is difficult to improve is solved.

The application discloses a combined absorbent for removing acid gas and application, and belongs to the field of acid gas removal. The combined absorbent comprises a ring group substituted organic amine, a defoaming agent, a corrosion inhibitor, an oxygen scavenger, an organic solvent and a deionized water solvent. The application comprises the following steps: directly using the combined absorbent or using the combined absorbent after dilution with water to remove acid gas in raw material gas. The application of the combined absorbent is simple, low in cost and outstanding in synergistic effect, and especially obvious improvement is achieved in reducing energy consumption, reducing the circulation amount of the absorbent and corrosion of acid gas absorption and regeneration equipment.

Silicone hydrogel contact lenses suitable for use as daily disposable lenses, comprise a cured product of: a) a thermally-activated polymerization initiator, b) at least one oxygen scavenger includin

This invention provides a carboxylated nitrile butadiene latex, its preparation method, and its application. The carboxylated nitrile butadiene latex, by mass parts, is composed of the following raw materials: butadiene, acrylonitrile, methacrylic acid, emulsifier, dispersant, electrolyte, ferrous sulfate, reducing agent, molecular weight regulator, oxygen scavenger, initiator, and demineralized water. The emulsifier is a mixture of anionic and cationic emulsifiers; the anionic emulsifier is sodium dodecyl sulfate, and the cationic emulsifier is a glycosyl gemini cationic surfactant. The mass ratio of the anionic emulsifier to the cationic emulsifier is 1:0.05–0.1. This carboxylated nitrile butadiene latex not only has low gel content and high mechanical stability, but its preparation method is also simple and controllable, making it easy for industrial production.

This invention discloses a water-based formate annular protective fluid for deep-sea oil and gas field development and its preparation method, specifically relating to the field of chemical corrosion prevention in oil and gas field development. The fluid comprises the following raw material components by mass percentage: 15wt%-40wt% organic-inorganic salt composite base fluid, 3wt%-8wt% green composite corrosion inhibitor, 2wt%-5wt% composite oxygen scavenger, 1wt%-3wt% zwitterionic bactericide, 2wt%-4wt% composite scale inhibitor, 0.5wt%-2wt% high-pressure stabilizer, 0.3wt%-1.5wt% environmental synergist, 1wt%-3wt% natural gas hydrate inhibitor, with the balance being deionized water. This invention, by employing a specific compounded high-pressure stabilizer and an optimized composite salt-based liquid, can withstand high-pressure environments exceeding 30 MPa and maintain excellent physical and chemical stability within an extreme temperature fluctuation range of -10°C to 180°C. After testing at 180°C for 168 hours, the liquid showed no stratification, no precipitation, and minimal density change, demonstrating its outstanding thermal stability and pressure resistance, making it fully adaptable to the harsh working conditions in the deep sea, from low temperatures on the seabed to high temperatures at the bottom of wells.

The invention provides an annulus protection fluid suitable for ultra-high-temperature working conditions of a myriameter deep well and a preparation method, raw materials comprise a weighting agent, a corrosion inhibition buffer system, a corrosion inhibition synergist, a deoxidant, an inorganic solubilizer and water, and the corrosion inhibition buffer system is a phosphate corrosion inhibition buffer system or a carbonate corrosion inhibition buffer system. The annulus protection fluid has the advantages of being adjustable in density, low in corrosivity, resistant to high temperature and gas cut, stable in performance, low in cost, simple in field operation, easy to prepare and the like, the application temperature can reach 230 DEG C, the density reaches 2.4 g / cm < 3 >, different well completion requirements are met, an oil sleeve is effectively protected, the sleeve damage and oil pipe corrosion failure risk is reduced, and smooth exploitation of oil gas is guaranteed.

The application discloses a method for improving PPTC stability by using metastable oxide and PPTC, and belongs to the field of thermistors and circuit protection. The method comprises the following steps: mixing tungsten carbide powder and metastable oxide powder, vacuum drying to obtain dry modified tungsten carbide powder; and blending the dry modified tungsten carbide powder with polyvinylidene fluoride (PVD F ) to prepare PPTC. The application utilizes the instability of metastable oxides such as ferrous oxide (FeO) to make it react with oxygen in the environment in preference to tungsten carbide, thereby playing the roles of "sacrificial protection" and "oxygen scavenger", and the generated stable oxide further forms a barrier layer. It is verified by experiments that the PPTC prepared by the application has a significantly reduced resistance change rate after aging in a double-85 high temperature and high humidity environment, and has higher environmental stability.

The invention provides a slow-release fruit fumigation preservative based on a natural preservative and a preparation method thereof, and belongs to the technical field of fruit bacteriostasis and preservation, the slow-release fruit fumigation preservative comprises the following raw material components by weight: 27-35% of a deoxidant, 1.5-2% of calcium chloride, 60-70% of plant essential oil microcapsules, and 1.5-3% of modified calcium peroxide. A humidity response release mechanism is achieved through the chitosan-sodium alginate microcapsules, and the slow release effect of the plant essential oil is achieved; the deoxidant is used for rapidly reducing the initial oxygen concentration in the fruit package and weakening the aerobic respiration of the fruit package; the modified calcium peroxide slowly releases oxygen and absorbs carbon dioxide, so that anaerobic respiration is avoided. The preservative has the advantages of being non-contact, controllable in slow release, friendly in component and the like, and can effectively prolong the storage period of the fruits and maintain the quality of the fruits.

A closure device for a container to provide a combined protection of inert gas and oxygen scavenger methods. The closure device comprises a body, a fastening member, one or more plurality of protrusions, a blister, a hollow shaft, and a seal member. The closure device is removably coupled to an open end of the container through a fastening assembly. The fastening assembly includes at least one of friction fit, a snap fit, a screw fit, or any of a variety of fastening mechanisms. The closure device provides a combined protection of inert gas and oxygen scavenger methods. This is beneficial because it prevents nutritional and organoleptic degradation processes of wine through oxidation while aids to preserve the fruitier and fresher aromas and flavors of the wine. The closure device is designed to fit snugly over the neck of the bottle and create an airtight seal.

This invention discloses a nano-air-driven oxygen-scavenging foaming agent, composed of the following components: 0.1%-2% surfactant, 0.1%-0.5% polymeric foam stabilizer, 0.1%-2% nanoparticle material, 0.2%-5% oxygen scavenger, and the balance being water. The invention also discloses a method for preparing the nano-air-driven oxygen-scavenging foaming agent, comprising the following steps: adding the prescribed amounts of nanoparticle material, polymeric foam stabilizer, and oxygen scavenger sequentially to the prescribed amounts of water, and finally adding the surfactant, stirring until homogeneous, and allowing to stand. This invention has the following beneficial effects: 1. The foaming volume of the oxygen-scavenging foaming agent is greater than 600 mL, the semi-foam lifespan is greater than 20 days (480 h), and the foaming performance and salt resistance are less than 100,000 mineralization; 2. Low oil-water interfacial tension and surface tension; 3. After being placed at 70°C for 10 hours, the dissolved oxygen concentration decreases from 5.345 mg / L to 0.042 mg / L.

A method of modifying a liquid sample containing an analyte so as to increase SERS signal intensity of the analyte is provided. The method of the present invention comprises the steps of: providing the liquid sample to be analyzed using SERS; and adding an oxygen scavenger to the liquid sample so as to remove dissolved oxygen from the liquid sample. A probe for remote sensing of an analyte in a liquid sample using SERS is also provided. The probe of the present invention comprises a detection chamber having a window that is transparent to SERS excitation light and Raman scattered signal, and tubing with a first and a second end, the first end of the tubing being flowably connected to the detection chamber and the second end of the tubing being configured to be placed in contact with a liquid sample.

Methods are provided for modifying a liquid sample containing an analyte to increase the SERS signal intensity of the analyte. The methods of the invention include the steps of providing a liquid sample to be analyzed using SERS, adding an oxygen scavenger to the liquid sample to remove dissolved oxygen from the liquid sample. Also provided is a probe for remotely detecting an analyte in a liquid sample using SERS. The probe of the invention includes a detection chamber having a window that is transparent to SERS excitation light and Raman scattered signals, and a conduit having a first end and a second end, the first end of the conduit being flowably connected to the detection chamber, the second end of the conduit being in contact with the liquid sample.

Various embodiments may relate to a non-volatile memory device. The non-volatile memory device may include a first electrode and a second electrode. The non-volatile memory device may additionally include a switching stacked arrangement between the first electrode and the second electrode, and an oxygen scavenger layer between the switching stacked arrangement and the second electrode. The non-volatile memory device may additionally include a diffusion barrier layer between the oxygen scavenger layer and the second electrode. The switching stacked arrangement may include alternating tunneling barrier layers and active layers. A first tunneling barrier layer of the tunneling barrier layers may be in physical contact with the first electrode. A last active layer of the active layers may be in physical contact with the oxygen scavenger layer. A bandgap of each of the tunneling barrier layers may be greater than a bandgap of each of the active layers.

A packaged, sealed container system for stable storage of a formulation of an oxygen-sensitive pharmaceutical compound, the packaged, sealed container system comprising a primary container including therein a formulation of an oxygen-sensitive pharmaceutical compound, a secondary outer container comprising a first flexible sheet layer, an opposing second flexible sheet layer, and a seal disposed along a common peripheral edge of the first and second flexible sheet layers, such that the primary container is disposed between and enclosed by the first and second flexible sheet layers of the secondary outer container. An oxygen scavenger is also disposed between and enclosed by the first and second flexible sheet layers of the secondary outer container. The oxygen scavenger is in fluid communication with the contents of the primary container.

There is provided an oxygen scavenger composition comprising iron, a metal salt and water, wherein the content of water per unit surface area of the iron present on the surface of the iron, [the content of water present on the surface of the iron] (g) / {the content of the iron (g) × the specific surface area of the iron (m2 / g)}], is 0.60 g / m2 or more and 2.00 g / m2 or less.

The invention discloses a compressed air energy storage condensate water recovery and heat storage and exchange medium supply method and system, and belongs to the field of compressed air energy storage. Conveying the condensed water to a pretreatment device to remove lubricating oil and solid particles to obtain purified condensed water; conveying to a deep desalting device to remove dissolved salt so as to obtain desalted water; introducing a deoxidizing device to physically deoxidize to obtain deoxidized water; adjusting the water quality of the deoxygenated water, adding a chemical deoxidant to eliminate residual dissolved oxygen, and adding an alkaline agent to adjust the pH value so as to obtain adjusted condensate water; and finally, conveying to a heat storage and exchange system as a medium. The system comprises an air compressor unit, a condensate water collecting device, a pretreatment device, a deep desalting device, a deoxidizing device, a water quality adjusting device, a heat storage and exchange system, a control system and a supply pump. Condensate water generated in the air compression process is recycled and used as supplement water of the heat storage and exchange system after being treated, the process is simplified, the cost is reduced, and water resources are saved.

A memory device including a vertical stacking structure, a method for manufacturing the same, and an electronic device including the memory device are disclosed. A memory device including a vertical stacking structure according to one embodiment comprises an oxygen scavenger layer provided on a base substrate, a recording material layer provided on the oxygen scavenger layer and in direct contact with the oxygen scavenger layer, a channel layer provided on the recording material layer, a gate insulating layer provided on the channel layer, and a gate electrode provided on the gate insulating layer, wherein the oxygen scavenger layer includes an element that creates an oxygen vacancy in the recording material layer and does not include oxygen.

Provided is an oxygen scavenger composition for which the initial oxygen absorption by the composition is suppressed, thereby making it possible for the composition to exhibit sufficient oxygen absorption performance even after being handled in the atmosphere for a certain amount of time. This oxygen scavenger composition contains: a metal halide-coated iron powder (A) obtained by coating a reduced iron powder having an iron oxide on the iron surface with a metal halide; and a moisture-donating agent (B). The proportion of the element iron in the iron powder that results from excluding the metal halide and moisture from the metal halide-coated iron powder (A) is 97.0-99.3 mass%, and the metal halide content is 0.01-1.0 parts by mass per 100 parts by mass of the iron powder that results from excluding the metal halide and moisture from the metal halide-coated iron powder (A).

The application relates to a steel wire rope device for suspending oxygen scavengers of a tobacco stack and a tobacco stack maintenance system. A first suspension support assembly is configured to span a gap between a first tobacco stack and a second tobacco stack and is connected to the first tobacco stack and the second tobacco stack respectively. A second suspension support assembly is also configured to span the gap and is connected to the first tobacco stack and the second tobacco stack respectively. The second suspension support assembly is spaced apart from the first suspension support assembly. A first end of a steel wire rope is connected to the first suspension support assembly through a steel wire rope tensioner, and a second end of the steel wire rope is connected to the second suspension support assembly. The steel wire rope is configured to be arranged in the gap and is used for suspending a medicine strip in the gap. The application has the advantage of easily arranging the medicine strip. The medicine strip is arranged in the gap at any position between the tobacco stacks instead of being placed on the top of the tobacco stacks. The application is not restricted by the traditional medicine box which must be placed on the top of the tobacco stacks. An operator does not need to climb to the top of the tobacco stacks. The application also solves the problem of narrow operation space caused by small distance between the top of the tobacco stacks and the ceiling.

The application belongs to the field of batteries, and particularly relates to a modified lithium-rich lithium iron phosphate lithium supplement agent, a preparation method and application thereof, a lithium-supplemented positive electrode and a lithium ion battery, wherein the modified lithium-rich lithium iron phosphate lithium supplement agent comprises a core and a shell coated on the surface of the core, the core is lithium-rich lithium iron phosphate, and the shell comprises an oxygen scavenger, porous carbon and a fast ion conductor; the oxygen scavenger comprises at least one of potassium sulfide, zirconium disulfide, di-aluminum sulfide, cuprous sulfide and magnesium sulfide. The application provides a new material in which the lithium-rich lithium iron phosphate is coated with a shell of a synergistic composite material of an oxygen scavenger, porous carbon and a fast ion conductor, and based on the combination of the shell synergistic components and the core-shell structure, the problems of gas generation and poor air stability of the lithium-rich lithium iron phosphate can be solved from the root cause, and the first efficiency and long cycle stability of the battery assembled from the material can be effectively improved.

A closure device for a container to provide a combined protection of inert gas and oxygen scavenger methods. The closure device comprises a body, a fastening member, one or more plurality of protrusions, a blister, a hollow shaft, and a seal member. The closure device is removably coupled to an open end of the container through a fastening assembly. The fastening assembly includes at least one of friction fit, a snap fit, a screw fit, or any of a variety of fastening mechanisms. The closure device provides a combined protection of inert gas and oxygen scavenger methods. This is beneficial because it prevents nutritional and organoleptic degradation processes of wine through oxidation while aids to preserve the fruitier and fresher aromas and flavors of the wine. The closure device is designed to fit snugly over the neck of the bottle and create an airtight seal.

The present application relates to the technical field of oilfield chemical technology, and is a water-based annulus protection fluid and a preparation method thereof.The former raw materials, calculated according to mass percentage, comprise 0.1% to 2% acid gas corrosion inhibitor, 0.1% to 2% polycyclic azide structure sulfur removal agent, 0.1% to 2% polymeric guanidine bactericide, 0.1% to 5% oxygen scavenger, and 0.1% to 2% pH regulator, with the rest being water.The required amount of acid gas corrosion inhibitor, polycyclic azide structure sulfur removal agent, polymeric guanidine bactericide, oxygen scavenger and pH regulator are added to water, and after mixing and stirring, the water-based annulus protection fluid is obtained.The present application has good corrosion inhibition effect under simulated working conditions, with a corrosion inhibition rate of less than 0.05 mm / a, which is much lower than the corresponding industry standard.The scale inhibition rate and bactericidal rate meet the industry standard, and the present application has good protection function for the inner wall of the casing and the outer wall of the oil and gas pipeline in the annular space under acidic environment, which not only prolongs the service life, but also guarantees the safety production of oilfields.

Storage stable aqueous ready-to-administer formulations comprising isoproterenol are presented with desirable stability characteristics. In preferred aspects, formulations are terminally sterilized and packaged in a suitable format, such as a polymeric bag with metalized overwrap and include a non-contact oxygen scavenger.

This invention provides a soil-free reservoir protection water-based drilling fluid, its preparation method, and its application, belonging to the field of drilling fluid technology. The drilling fluid of this invention comprises the following raw materials in parts by weight: 100 parts water, 0.2-0.4 parts a first pH adjuster, 1-3 parts an oxygen scavenger, 0.1-0.4 parts a viscosity enhancer and shearing agent, 2-4 parts a filtration loss reducer, 4-6 parts magnesium aluminum hydrotalcite, 4-6 parts micro / nano alumina, 4-6 parts ultrafine calcium carbonate, 4-6 parts a lubricant, 1-2 parts a corrosion inhibitor, and 70-660 parts an inorganic salt weighting agent. The drilling fluid of this invention exhibits excellent high-temperature resistance, good rheological properties, and excellent filtration loss reduction performance. It can be formulated into a saturated CaCl2 / saturated CaBr2 system, is free of barite and clay, has a high mud cake acid solubility, and after plugging, its permeability recovery is greater than 72%, providing good reservoir protection and possessing the potential for large-scale field application.

An oxygen scavenger composition contains mixed granules of a composition containing a water retention agent, a swelling agent, a metal halide, water, iron, and an alkaline substance, the alkaline substance containing at least one substance selected from the group consisting of hydroxides of alkali metals, hydroxides of alkali earth metals, and salts comprising a weak acid and a strong base.

A method for modifying a liquid sample containing an analyte to increase the SERS signal intensity of the analyte is provided. The method of the present invention comprises the steps of: providing a liquid sample to be analyzed using SERS; and adding an oxygen scavenger to the liquid sample to remove dissolved oxygen from the liquid sample. A probe for remotely sensing an analyte in a liquid sample using SERS is also provided. The probe of the present invention comprises a detection chamber having a window transparent to SERS excitation light and Raman scattering signals, and a pipe having first and second ends, wherein the first end of the pipe is movably connected to the detection chamber and the second end of the pipe is configured to be positioned in contact with the liquid sample.

The invention discloses a temperature response type solid-free drilling fluid which comprises the following raw materials in parts by weight: 100 parts of fresh water; 1-2 parts of a thermal association polymer; 1.5 to 2.5 parts of a cationic polymer filtrate reducer; 20-30 parts of inorganic salt; 0.5 to 1 part of a deoxidant; wherein the thermal association type polymer is prepared from the following raw materials in parts by weight: 20 to 35 parts of alkenyl amide monomer, 20 to 50 parts of alkenyl rigid monomer, 10 to 30 parts of alkenyl sulfonic acid monomer and 10 to 30 parts of alkenyl cationic monomer. The solid-free drilling fluid is based on the specific thermal association type polymer and the cationic fluid loss additive, the high-temperature rheological property of the solid-free drilling fluid is improved, and meanwhile, the high-temperature fluid loss property of the drilling fluid is effectively reduced, so that the borehole purification and reservoir protection properties of the solid-free drilling fluid when the solid-free drilling fluid is applied to deep oil and gas reservoir drilling are improved.