51 results about "Non oxidative" patented technology

Method of manufacturing a steel strip comprising the steps of: - casting a molten steel into a slab; - reheating the slab at a temperature of 1150°C or more for a time of 1 hour or more; - hot rolling the steel into a strip, preferably using an average F1 slab entry temperature of more than 1000°C; - coiling the hot rolled steel strip; - batch annealing the steel strip: - at a temperature in the intercritical range (i.e. between Ac1 and Ac3), preferably less than 700°C; - in a non-oxidizing and non-nitrogenizing atmosphere; - for a total annealing time of at least 5 hours, preferably at least 10 hours so as to obtain: a Mn enrichment in austenite such that the Mn content is at least 1.25 times the overall Mn content of the steel; and a C enrichment such that the C content is at least 1.2 times the overall C content of the steel; - cooling the steel after batch annealing in air, forced air or water quenching.

The application discloses a non-oxidative weak-acid polyacrylamide degrading agent and a preparation and use method thereof, and the degrading agent comprises the following components: a reducing agent, a regulator, a mutual solvent and water; the reducing agent is one of 3-O-ethyl ascorbic acid ether and L-ascorbic acid-2,6-dibutyrate; the regulator is ammonium chloride; and the mutual solvent is one of ethylene glycol monobutyl ether and isopropyl alcohol. The problems that the existing degrading agent needs to be isolated by a plug for redox reaction with subsequent injected mud acid or secondary precipitation is caused by metal ions such as Na + , K + , Fe 2+ and the like in the degrading agent and subsequent injected mud acid are effectively solved.

The present invention easily yields, in a short time, a gas consisting mainly of high-concentration methane, by gasifying a yielded biocoal carbonization product. In this subcritical-water treatment device, a first-stage treatment at 150-220°C for a predetermined and prescribed treatment time is set in a first-stage temperature range not higher than 220°C, and a second-stage treatment at 110-130°C for a predetermined and prescribed treatment time is set in a second-stage temperature range not higher than 130°C. In the first-stage treatment, low-grade coal as a raw material to be treated is deprived of moisture to form voids in a volume amount of 20% or larger per unit volume of the low-grade coal, and molten / liquefied components are formed from some of the low-grade coal. In the second-stage treatment, the molten / liquefied components are solidified in the voids and caused to adhere to components in the other portions that have not been melted or liquefied, thereby filling the voids and yielding a biocoal carbonization product having a void content of 9% or less with respect to the entire volume. This device for utilizing reformed low-grade coal is equipped with a gasification means for methanating the biocoal carbonization product, the gasification means gasifying, in a non-oxidization state, the reformed low-grade coal yielded from a bio-based carbonization product to yield methane.

The invention discloses a ruthenium-based ammonia synthesis catalyst, a preparation method thereof and application of the ruthenium-based ammonia synthesis catalyst in catalytic synthesis of ammonia. The ruthenium-based ammonia synthesis catalyst comprises a high-entropy oxide carrier and a ruthenium active component loaded on the carrier, the high-entropy oxide is a single solid solution phase formed by oxides of at least three of Mg, Ca, Sr and Ba and oxides of at least two of La, Ce, Pr, Nd and Sm. The preparation method comprises the following steps: mixing soluble salts corresponding to metals forming the high-entropy oxide with an organic foaming agent in water, evaporating and concentrating to form gel, and carrying out heat treatment at 110-150 DEG C to foam the gel to obtain a porous fluffy solid precursor; grinding the solid precursor, carrying out Joule heating treatment in a non-oxidizing atmosphere, instantly heating the solid precursor to 600-1200 DEG C within 10 seconds, carrying out heat preservation for 1-10 seconds, and then cooling to obtain a high-entropy oxide carrier; and loading a ruthenium active component on the high-entropy oxide carrier to obtain the ruthenium-based ammonia synthesis catalyst.

A method for producing lithium sulfide according to the present invention is characterized by having a raw material mixing step (S1) in which lithium sulfate and a carbon material are mixed to form a mixed raw material, and a thermal reduction step (S2) in which the mixed raw material is heat-treated in a non-oxidizing atmosphere and the lithium sulfate is thermally reduced to generate lithium sulfide, the method also being characterized in that a carbon powder having a specific surface area measured by the BET method of 55 m2 / g or greater is used as the carbon material. A method for producing a sulfide-based solid electrolyte according to the present invention is characterized in that lithium sulfide produced through the method for producing lithium sulfide according to the present invention is used as a raw material.

The product flow system comprises the following steps: preliminary processing of the surface of a copper processing product; keeping the surface of the copper processing product in a non-oxidized color-changing state; transferring the copper product and removing cutting fluid on the surface of the copper product; preventing residual cutting fluid; opening a carbon hydrogen cleaning machine, and automatically cleaning the copper processing product taken out from a cutting water agent tank through the carbon hydrogen cleaning machine; taking and storing the product; the product flow system provided by the application reduces the corrosion of copper by cutting fluid in the flow process, reduces the oxidation of copper body, removes water on the surface of copper, and makes the workpiece cleaning more clean. The copper product itself is processed and reserved, and subsequent soaking of cutting fluid is further recycled, which ensures industrial green production and does not pollute the environment.

This invention provides a manufacturing method suitable for mass production that enables the production of silicon-based alloys with extremely low titanium concentrations without the need for high-grade raw materials. The raw materials, including a silicon source and a reducing agent, are heated and melted to produce a molten material, which is then subjected to additional refining. In the first stage of additional refining, a non-oxidizing gas containing nitrogen is blown into the molten material, and in the second stage of additional refining, an oxidizing gas containing oxygen is blown into the molten material.

A method of measuring and suppressing carbon dioxide in oil and gas geologies is described. A lithological profile of an oil and gas well / reservoir is determined to understand the lithological components which is then used to derive compositions and concentrations of non-oxidizing reagents, corrosion / scale inhibitors, and surfactants for use in a well for the suppression of carbon dioxide formation.

The present invention relates to a catalyst article for treating exhaust gas, the catalyst article comprising a substrate and at least a first catalytic region disposed on the substrate, wherein the first catalytic region comprises a ceria-zirconia support material and a non-ceria-zirconia support material; wherein from 0.1 to 3 wt. % Pt is supported on the ceria-zirconia support material, based on the total weight of the Pt supported on the ceria-zirconia support material and the ceria-zirconia support material; wherein less than 0.1 wt. % Pt is supported on the non-ceria-zirconia support material, based on the total weight of the Pt supported on the non-ceria-zirconia support material and the non-ceria-zirconia support material; and wherein the first catalytic region comprises from 0.1 to 50 g / ft3 Pt, based on the total volume of the substrate.

A reactor, system, and method of converting methane non-oxidatively. A thermal catalytic reactor has a non-oxidative methane coupling (NMC) catalyst disposed on a first surface of a substrate. The NMC catalyst endothermically converts methane in a reaction zone on the catalyst side of the reactor to a product mixture. The reaction zone is heated by thermal conduction. The spatial temperature profile has a sharp increase and decrease that leads to selective control of the surface methane activation and gas phase reaction propagation. The reactor also has an inlet for introducing methane gas for contacting the NMC catalyst and an outlet for removing the product mixture. The heat source may generate the process heat chemically or electrically. Temperature profiles are controlled by zoning the combustion catalyst location or conductive heating element in the reactor.

This invention discloses a method for purifying single-walled carbon nanotubes (SHU). The purification method includes the following steps: mixing crude SHU with a non-oxidizing acid solution in a reaction vessel; introducing gas into the reaction vessel; heating the reaction; and separating the solid and liquid phases to obtain the final product. This invention uses a non-oxidizing acid and gas bubbles to synergistically purify SHU, ensuring effective removal of metallic impurities and amorphous carbon while protecting the SHU from structural damage.

A method for producing phosphorus in which a reaction for forming gaseous phosphorus (g) by bringing phosphorus oxide generated by heating a liquid phosphoric acid compound into contact with a carbon material to reduce the phosphorus oxide and for condensing the gaseous phosphorus (g) to obtain liquid phosphorus (L) is conducted by a flow reaction with a nonoxidizing gas flow, wherein the reduction reaction of the phosphorus oxide is conducted in a carbon material-packed bed, and the condensation of the formed gaseous phosphorus (g) is substantially conducted in a condensation accelerator-packed bed which is disposed downstream of the carbon material-packed bed in contact with the carbon material-packed bed.

The invention provides a passivation method of a sulfuration-state hydrogenation catalyst. The passivation method comprises the following steps: step 1, sulfurizing an oxidation-state hydrogenation catalyst; step 2, preparing a saturated solution of the passivator, and controlling the temperature to be 30-45 DEG C; step 3, in an inert atmosphere, impregnating the sulfurized hydrogenation catalyst in the saturated solution of the passivator, cooling the impregnated hydrogenation catalyst to room temperature in the inert atmosphere, and covering the passivator separated out by crystallization on the surface of the hydrogenation catalyst; wherein the passivating agent can be decomposed into a non-oxidizing small molecule compound at the temperature of 50 to 100 DEG C. The specific passivator is adopted, the hydrogenation catalyst is impregnated in the saturated solution of the passivator at a certain temperature, then the hydrogenation catalyst is cooled to the room temperature, and the passivator is crystallized, separated out and covered on the surface and pore channels of the hydrogenation catalyst, so that the catalyst can be isolated from external oxygen, and the effect of preventing the sulfurized hydrogenation catalyst from being oxidized is achieved.

The invention discloses a hollow positive electrode material precursor with an adjustable inner hole size. The chemical formula of the precursor is Ni < x > Co < y > Mn < z > (OH) < 2 >. The preparation method comprises the following steps: firstly, preparing a nickel-cobalt-manganese mixed salt solution, a precipitator, a complexing agent and a reaction kettle base solution; stirring is started, oxygen and nitrogen mixed gas is introduced, and then the mixed salt solution, the precipitator and the complexing agent are added into the base solution in a parallel flow mode for rapid nucleation. In the stage, the pH is controlled to be 12.00-12.40, the temperature is 45-70 DEG C, the ammonia concentration is 0.2-0.5 mol / L, and the nucleation duration accounts for 1-8% of the total duration. After nucleation, the pH value of the system is reduced to 11.3-12.0, feeding is continued for particle growth, and the atmosphere is switched into non-oxidizing gas. Increasing the flow of the mixed salt solution at the later growth stage until the reaction reaches the target particle size. Separating, aging, washing and drying the product to obtain a hollow precursor; the method is simple in process, low in cost, easy to scale and wide in industrialization prospect.

This invention relates to the field of high-performance thermoplastic composite materials, and in particular to a method for preparing polyaryletherketone resin. The method includes the following steps: under a non-oxidizing atmosphere, a dihydroxy aromatic monomer containing a bisphenol structure, a dihalogenated aromatic monomer containing a nitrile group, and a dihalogenated aromatic ketone monomer containing a difluorine substituted group are reacted in a polar solvent system with a boiling point above 150°C in the presence of an alkali metal carbonate to form the corresponding phenolate; an aromatic hydrocarbon dehydrating agent is added to the system for azeotropic dehydration to remove water generated during the reaction and promote the formation of the phenolate; a nucleophilic substitution polycondensation reaction is carried out at a higher temperature; during the polycondensation reaction, a capping agent is added to regulate the end-chain structure and molecular weight distribution, wherein the capping agent is 2,4′-difluorobenzophenone; after the reaction is completed, the reaction product is separated and purified to obtain the polyaryletherketone resin.

The application provides a synthesis method of aromatic primary amine compounds and relates to the technical field of organic synthesis. The synthesis method provided by the application comprises the following steps: under the action of a catalyst, aromatic hydrocarbon compounds and ammonium salt are reacted under visible light in a solvent system and a non-oxidizing atmosphere to generate aromatic primary amine compounds; and the catalyst comprises an acridine salt and a cobalt oxime complex. The application realizes primary amination of aromatic hydrocarbons by constructing C(sp 2 )‑N bonds through C‑H bond functionalization, and has the advantages of mild reaction conditions, simple operation, safety and greenness, no need of oxidants, atomic economy and step economy, and conformity to the green development concept.

The present invention addresses the problem of providing a carbon fiber bundle and a method for manufacturing the same, wherein the interfacial shear strength (IFSS) of the carbon fiber bundle indicating adhesion to resin is high, and the 90° bending strength of a carbon fiber reinforced composite material can be increased without reducing the strand elastic modulus and strand strength. The crystallite size is 2.9 to 3.4 nm and the iPa on the carbon fiber surface is 0.30 μA / cm2 or greater. In a method for manufacturing a carbon fiber bundle including a flame-proofing step for heating a carbon fiber precursor fiber bundle in an oxidative atmosphere and a carbonization step for heating the flame-proof fiber bundle after the flame-proofing step in a non-oxidative atmosphere, a substantially untwisted carbon fiber precursor fiber bundle is used, and the elongation of the fiber bundle in a carbonization temperature region of 1,000°C or greater in the carbonization step is set to −2.7% or greater, and the maximum carbonization temperature is set to 1,800-2,200°C.

The present disclosure refers to systems and methods for efficiently converting a C1-C3 alkane such as natural gas to a liquid C2-C10 product and hydrogen. Generally, the process comprises flowing the C1-C3 alkane through a plurality of tubes within a vessel wherein the tubes house a catalyst for converting the C1-C3 alkane to the liquid C2-C10 product and hydrogen. The C1- C3 alkane is heated under suitable conditions to produce the liquid C2-C10 product and hydrogen. Advantageously, the C1-C3 alkane is heated by burning a fuel outside the tubes in fuel burning nozzles configured to transfer heat from the burning through the tubes.

This invention discloses a method for preparing functional carbon materials with atomically dispersed Lewis acid-base sites, comprising: (1) polymer preparation to obtain a polymer sample; (2) polymer modification to obtain a modified polymer sample; (3) polymer carbonization: the modified polymer sample is heat-treated in a non-oxidizing atmosphere to carbonize the modified polymer sample; after carbonization, the system is naturally cooled; then, after washing and drying, the target functional carbon material is obtained. This invention utilizes atomically dispersed Lewis acidic metal sites and basic N sites to modify carbon materials in situ. The prepared functional carbon material has a large specific surface area, well-developed pore structure, abundant acid-base sites, and an atomically distributed structure, which can significantly improve the density of functional sites on the surface of the carbon material and its adsorption efficiency for boron, phosphorus, and metal impurities. Its application in the purification of chlorosilanes can greatly reduce the load of subsequent distillation and impurity removal, and improve the yield and quality of high-purity chlorosilanes.

This invention belongs to the field of microbial metabolic engineering and industrial biotechnology, and relates to an engineered *Pichia pastoris* strain utilizing xylose as the sole carbon source, its construction method, and its applications. Specifically, it involves reconstructing the xylose assimilation pathway within the host strain by introducing genes for the XI-XK pathway, the non-oxidative phase of the PPP pathway, and the PK-PTA pathway into the *Pichia pastoris* host strain, thus obtaining the engineered strain; or, culturing the above-obtained engineered strain in a culture system utilizing xylose as the sole carbon source to obtain an engineered *Pichia pastoris* strain with xylose as the sole carbon source; or, optimizing key gene targets and / or metabolic pathways of the above-obtained engineered strain or the engineered *Pichia pastoris* strain with the sole carbon source to obtain an engineered strain. This invention provides a method for obtaining a *Pichia pastoris* strain capable of using xylose as the sole carbon source, which enhances the xylose assimilation pathway through metabolic reconstruction, thereby improving xylose utilization.

Olefinic materials may be made by dehydrogenation utilizing a catalyst. The catalyst may include from 0.0005 wt.% to 0.1 wt% of platinum, palladium, rhodium, iridium, ruthenium, osmium, or combinations thereof; from 0.1 wt.% to 10 wt.% of gallium, indium, thallium, or combinations thereof; from 0.1 wt.% to 5 wt.% of one or more non-redox-active elemental additives; and at least 85 wt.% of support.

This invention discloses a method and system for controlling the protective atmosphere and cooling in a vertical furnace to improve the gloss of stainless steel, relating to the field of metal material heat treatment technology. The method is applied to a vertical furnace having a heating section, a soaking section, a slow cooling section, and a rapid cooling section. It includes: introducing a hydrogen-containing first protective atmosphere in the heating and soaking sections; introducing hydrocarbons in the slow cooling section to form a second protective atmosphere to repair the surface of the stainless steel strip; stopping the introduction of the aforementioned atmosphere in the rapid cooling section and switching to the introduction of a non-oxidizing gas for high-speed jet cooling; and adjusting the jet parameters of the non-oxidizing gas in real time according to the steel strip specifications and speed during cooling. This invention also discloses a system for implementing this method. This invention solves the problems of low gloss and unstable quality during stainless steel heat treatment, effectively repairs the chromium-depleted layer on the surface, avoids hydrogen embrittlement, and improves product surface quality and production stability.

The present application relates to the comprehensive field of mineral resources and the technical field of energy saving and consumption reduction, and particularly relates to application of coal ash in reduction of phosphate ore to obtain yellow phosphorus and a method for reduction of phosphate ore to obtain yellow phosphorus. The method comprises: in a non-oxidizing atmosphere, reduction reaction is carried out on a mixture containing phosphate ore, a reducing agent and a flux, yellow phosphorus furnace gas obtained is subjected to water washing and cooling, so that phosphorus steam in the yellow phosphorus furnace gas is stored in water in liquid or solid form, and yellow phosphorus is obtained; wherein the flux is selected from coal ash and optional silica; wherein the temperature of the reduction reaction is not lower than 1300 DEG C. The method provided by the present application can effectively improve the reduction rate of phosphate ore and shorten the reduction reaction time; the method realizes recycling utilization of coal ash resources.

Embodiments described herein relate to non-oxidized graphene-based anti-viral surfaces, and methods of producing the same. In some embodiments, a method of forming an anti-viral surface can include mixing a non-oxidized edge-functionalized graphene with a catalyst and a thermoset material to form a mixture, applying a high-shear mixing process to the mixture to form a mixed liquid, and coating the mixed liquid onto a base surface to form the anti-viral surface. In some embodiments, the method can further include chemically treating the graphene to produce the non-oxidized edge-functionalized graphene. In some embodiments, the thermoset material can include a thermoset matrix. In some embodiments, the method can include dispersing the non-oxidized edge-functionalized graphene into the thermoset matrix via the high-shear mixing. In some embodiments, dispersing the non-oxidized edge-functionalized graphene into the thermoset matrix can be via a ball mill, a high-shear mixer, and / or a homogenizer.

The present invention relates to cleaning compositions, in particular to cleaning compositions for use in heating, ventilation and air-conditioning (HVAC) installations. We describe an acidic cleaning composition concentrate comprising: at least one acid having a pKa1 of 4 or less, wherein the at least one acid is at least one organic acid and / or non-oxidising mineral acid; a rheology modifier, and a polar protic solvent. In some examples, compositions may also include at least one of one or more weak nitrogenous bases, one or more carboxylate salts and one or more surfactants.

The invention discloses a preparation process of enoxaparin sodium, and relates to the technical field of biological medicine, the process comprises the following steps: constructing a non-oxidizing and chromatography-free reaction-separation synergistic system, and sequentially completing quaternary ammonium salinization, benzyl esterification, alkaline beta-elimination degradation, activated carbon decoloration under neutral pH, gradient ultrafiltration classification, nanofiltration concentration and buffer replacement. And finally, carrying out terminal degerming filtration and freeze drying to accurately enrich a target active fragment of 2000-8000 Daltons. According to the present invention, the obtained product has characteristics of high anti-Xa / anti-IIa activity ratio, complete 1, 6-anhydrosugar chain end structure and narrow molecular weight distribution, the product yield achieves 82-86%, the batch-to-batch consistency and the green manufacturing level of the process are significantly improved, and the reliable and efficient technical path is provided for the large-scale production of the high-quality enoxaparin sodium.

Aspects of the invention are associated with the discovery of processes for converting methane (CH4), present in a methane-containing feed that may be obtained from a variety of sources such as natural gas, to higher hydrocarbons (e.g., C2+ hydrocarbons) such as C2 hydrocarbons (e.g., ethane, ethylene, and acetylene) and aromatic hydrocarbons (e.g., benzene, one or more C1- or C2-substituted benzenes, and / or one or more fused ring aromatic hydrocarbons). Representative processes involve direct, non-oxidative methane conversion (NOMC), such that the need for an oxidant to form CO as an intermediate may advantageously be avoided. This reduces overall complexity and the tendency to promote unwanted side reactions that reduce hydrocarbon yields and lead to CO2 production.

The application discloses a non-oxidizing bactericide for industrial circulating water and a preparation method thereof, and belongs to the technical field of industrial water treatment. The bactericide comprises degradable double-cation quaternary ammonium salt compounds 8.0%-12.0%, double-chain quaternary ammonium salt 5.0%-8.0%, natural composite plant extract 3.0%-6.0%, cosolvent 2.0%-4.0%, chelating agent 0.5%-1.0%, and the rest is deionized water; wherein the natural composite plant extract is a composite ethanol extract of mangosteen peel and henna seeds. The application constructs a three-dimensional synergistic system of "spreading penetration-powerful killing-multiple target resistance inhibition" through scientific compounding of three types of core components, and has the properties of high-efficiency broad-spectrum bactericidal, excellent biofilm stripping, strong drug resistance and green environmental protection, with a 28-day biological degradation rate of greater than or equal to 90%. Meanwhile, the preparation method is simple and controllable, has no toxic by-products, and is suitable for large-scale industrial production.

To provide a method for recovering valuable metals by which the valuable metals composed of cobalt and nickel can efficiently and stably be recovered from a raw solution containing cobalt and nickel.SOLUTION: A method for recovering a valuable metal comprising at least one of cobalt and nickel from a raw solution containing at least one of cobalt and nickel, the method comprising: The method includes a sulfide generation step S01 of forming at least one of cobalt sulfide and nickel sulfide to obtain a sulfide-containing liquid, a solid-liquid separation step S02 of subjecting the sulfide-containing liquid to solid-liquid separation to obtain a sulfide-cake containing at least one of the cobalt sulfide and the nickel sulfide, and a sulfide dissolution step S04 of adding a mineral acid to the sulfide-cake to dissolve the sulfide-cake in a non-oxidizing atmosphere.SELECTED DRAWING: Figure 1

The application discloses a ruthenium-based ammonia synthesis catalyst, a preparation method thereof and application of the catalyst in catalytic synthesis of ammonia. The ruthenium-based ammonia synthesis catalyst comprises a high-entropy oxide carrier and a ruthenium active component supported on the carrier; the high-entropy oxide is a single solid solution phase formed by oxides of at least three of Mg, Ca, Sr and Ba and at least two of La, Ce, Pr, Nd and Sm. The preparation method comprises the following steps: mixing soluble salts corresponding to each metal constituting the high-entropy oxide with an organic foaming agent in water, evaporating and concentrating to form a gel, heat-treating the gel at 110-150 DEG C to make the gel foam, and obtaining a porous and fluffy solid precursor; grinding the solid precursor and performing joule heating treatment in a non-oxidizing atmosphere, instantaneously heating the solid precursor to 600-1200 DEG C within 10 seconds, keeping the temperature for 1-10 seconds, and then cooling to obtain the high-entropy oxide carrier; and supporting the ruthenium active component on the high-entropy oxide carrier to obtain the ruthenium-based ammonia synthesis catalyst.