211 results about "Amine solvent" patented technology

A solvent that reversibly converts from a nonionic liquid mixture to an ionic liquid upon contact with a selected trigger, e.g., contact with CO₂, is described. In preferred embodiments, the ionic solvent is readily converted back to the nonionic liquid mixture. The nonionic liquid mixture includes an amidine or guanidine or both, and water, alcohol, or a combination thereof. Single component amine solvents that reversibly convert between ionic and non-ionic states are also described. Some embodiments require increased pressure to convert; others convert at 1 atmosphere.

An inhibitor composition contains dicyandiamide as a nitrification inhibitor, alkyl thiophosphoric triamide as a urease inhibitor, or a combination thereof, dissolved in a liquid medium comprising an organic solvent selected from, among others, one or more polar aprotic solvents, amine solvents, heterocyclic alcohol solvents, and mixtures thereof, is useful in making fertilizer compositions and in a method of fertilizing target plants.

The invention relates to a method for copper powder surface chemical plating silver, belonging to field of chemical silver plating. Said method comprises following steps: putting copper powder into diluted acid of 5-10% to remove oxide on surface of copper powder; adding disperser of 1-30% of copper powder by weight, stabilizer of 10-60% of copper powder by weight into deionized water to form reducing liquid, adding copper powder and stirring; adding silver nitrate into deionized water, adding ammonia, stirring and adding sodium-hydroxide and getting silver amine solvent; adding silver amine solvent into reducing liquid under stirring, finishing chemical silver plating of copper surface 10-50 minutes later; filtering, separating and washing, vacuum drying and getting silver-coated copper powder. The process is characterized by simple preparation and raw material, reduced silver-plated layer on container wall by adding silver amine solvent into reducing liquid, high silver converting rate. The electrical resistance of got copper powder is smaller than 2*10-4 omegacm.

The invention provides a method for controlling an amine solvent regeneration system, belongs to the technical field of amine solvent recovery, and comprises an amine recovery tower. The method is characterized in that a heat supply regulating valve of a tower bottom reboiler is related to system pressure; and a distilled line regulating valve of a tower top product is related to the gas-phase temperature of the tower top. The method can meet the requirement on purification degree of an amine solvent product on the tower bottom only by presetting a system pressure value and a tower top gas-phase temperature vale; and the control system can trace variations of feeding flow rate, feeding quality and feeding temperature to realize automatic regulation and obtain perfect tower bottom products.

The invention belongs to the technical field of desulfurization, and relates to an absorbent for selectively removing H2S and organic sulfur. An aqueous solution formed by mixing 1 to 15 mass percent of polyamide-amine dendritic compound with high desulfurization selectivity and 50 to 10 mass percent of alcohol amine is used as the absorbent. Under the conventional desulfurization process flow and the unit equipment condition, the absorbent can selectively remove the H2S or the organic sulfur or the H2S and the organic sulfur from one of CO2 and H2S and/or COS, CS2, RSH and the like or mixed airflow of multiple organic sulfurs, has better H2S removal selectivity and higher organic sulfur removal rate compared with a conventional alcohol amine solvent, and reduces the circulating quantity of the solution.

The invention provides a method for synthesizing series alloy nanometer crystals and belongs to the technical field of inorganic material preparation processes. In a long chain amine solvent, metallic inorganic salt serving as a raw material is reacted at the temperature of between 180 and 300 DEG C for 10 to 60 minutes, and by controlling the test parameters of a mol ratio of the reactants, a concentration of the reactants and a reaction temperature, a series of alloy nanometer crystals with controllable composition, structure, shape and size are formed. The method has the advantages of low-priced and readily available raw materials, short reaction time, repeatedly usable solvent, simple equipment, easy control, high process repeatability, stable product quality, safe and reliable operation and the suitability for mass industrialized production.

The invention discloses a method for preparing silver nanowires. The method includes: (1) sequentially taking organic amine solvent, water, ascorbic acid and surface active agent to prepare mixed solution A; (2) taking silver salt precursors, chlorinated inorganic salt and polyhydric alcohols solvent to prepare mixed solution B; (3) mixing the mixed solution A with the mixed solution B to obtain basic silver nanowire solution; (4) diluting the basic silver nanowire solution, washing and purifying to obtain concentrated silver nanowire solution; and (5) drying the concentrated silver nanowire solution to obtain silver nanowire powder product. The method for preparing the silver nanowires has the advantages that the method is simple, easy to operate and needless for heating, the obtained silver nanowires are adjustable in diameter in a large range, the method is simple in technology, convenient to operate and good in repeatability, and transparent conducting thin films made of the obtained product have the advantages of high transparency, low surface resistance, low haze and the like and are fully similar to ITO (indium tin oxide) transparent conducting thin films in performance.

The invention provides an iron carbide particle, and a fabrication method and an application thereof. Iron carbide is a nanoparticle taking Fe5C2 as a main component, and a particle size is 1-100nm. The fabrication method of the iron carbide particle comprises the following steps that a carbonization inductive agent and a solvent are mixed to form a mixed solution, a mole ratio of the carbonization inductive agent to the solvent is 1:(100-600), the carbonization inductive agent is halogenated ammonium salt, and the solvent is a long-chain amine solvent with a boiling point greater than 250 DEG C; a zero-valent iron organic compound is added to the mixed solution which is heated to 180-200 DEG C in a protective atmosphere; a reaction system is controlled at 250-380 DEG C for 10-120min; solid-liquid separation is performed after the reaction system is cooled; and the iron carbide particle product is collected. The iron carbide particle takes Fe5C2 as a major phase, is in a nanoparticle shape, can show higher catalytic activity, and is particularly applicable to catalysis of fischer-tropsch synthesis.

There is provided herein a system and method for treating source water to remove contaminants such as oil from oil-fields produced water. In some embodiments, source water containing CO₂, endotoxins, foulants, sulfate, and oxygen will be treated with aluminum nitrate or iron nitrate, separating the CO₂ and endotoxins from the treated water, removing the foulants by mixing hydrated lime and an amine solvent with the treated water, and separating the dissolved oxygen and recovering the amine solvent using a hydrophobic membrane.

A process for the removal of an amine captureable gas from a feed gas stream using an amine solvent, the process comprises (a) contacting the feed gas stream with a lean amine solvent to form a rich amine solvent, wherein heat stable salts are present in the rich amine solvent; (b) stripping amine captureable gas from the rich amine solvent to form the lean amine solvent and an overhead reflux stream; (c) periodically contacting at least a portion of one or both of the lean amine solvent and the rich amine solvent with an anion exchange resin to form a first heat stable salt lean amine solvent; (d) periodically regenerating the anion exchange resin, wherein during the regeneration of the anion exchange resin, at least a portion of the reflux stream is used to wash the amine solvent from the anion exchange resin to produce a second heat stable salt lean amine solvent; and, (e) recycling at least a portion of the first and the second heat stable salt lean amine solvent for use in capturing the amine captureable gas from the feed gas.

A resist film and a polymer layer adhered on a semiconductor substrate can be removed by the method according to the present invention. A first processing liquid, typically including a oxidizing agent, such as hydrogen peroxide solution, is fed to the substrate, thereby the condition of the resist film and the polymer layer is changed. Next, a second processing liquid, typically including a dimethyl sulfoxide and an amine solvent, is fed to the substrate, thereby the resist film and the polymer layer is dissolved and lifted off from the substrate. A sputtered copper particles included in the polymer layer can also be removed.

The invention belongs to the technical field of medical intermediate preparation, and particularly relates to a synthetic technology of furan ammonium salt. The synthetic technology comprises the steps that 2-acetyl furan is used as a raw material to form furanone acid through oxidative synthesis at first, then esterification is performed, the product reacts with methoxyamine to be synthesized into a methoxy group oximation product, the methoxy group oximation product is hydrolyzed and then reacts with an alcohol amine solvent, and the furan ammonium salt is obtained. Due to the fact that the furanone acid is esterified at first, the carbonyl activity is improved, and more oximation products are promoted to be converted into cis-form products. The content of the obtained anti-form furan ammonium salt is only 5-8%; compared with a traditional furan ammonium salt production method, the content of the anti-form furan ammonium salt is obviously reduced without lowering productivity.

An inhibitor composition contains dicyandiamide as a nitrification inhibitor, alkyl thiophosphoric triamide as a urease inhibitor, or a combination thereof, dissolved in a liquid medium comprising an organic solvent selected from, among others, one or more polar aprotic solvents, including one or more organophosphates, amine solvents, heterocyclic alcohol solvents, and mixtures thereof, is useful in making fertilizer compositions and in a method of fertilizing target plants.

The invention provides an amine composition which consists of diamine and monoamine in the molar ratio of (1.1-17.1):1. The invention further provides polyurethane resin and a preparation method thereof. The total amine value of the polyurethane resin is 1.20-20.0 mgKOH/g; the primary amine value is 8.7-38.8 percent of the total amine value; the secondary amine value is 5.6-82.6 of the total amine value; and the tertiary amine value is 8.7-55.6 percent of the total amine value. The preparation method comprises the following steps of: mixing high molecular dihydric alcohol with diisocyanate ester; adding a catalyst, and reacting at the temperature of 30-100 DEG C for 2-8 hours to obtain a dibasic alcohol polymer; reacting with a low molecular active hydrogen compound and a low molecular polyhydroxy compound; adding diamine which accounts for 0-70.6 percent of 100 percent by weight of diamine in the amine composition, and expanding a chain in an ester solvent; and adding the rest of diamine in the amine composition and all monoamine, and undergoing chain expansion and chain termination reactions in an ester and/or amine solvent to obtain polyurethane resin. The prepared polyurethane resin has the advantages of high physical and mechanical properties and high-temperature stewing resistance.

The invention discloses a method for preparing cuprous chloride-modified honeycomb activated carbon for absorbing nitric oxides (NOx less than or equal to 50ppm) with high efficiency normal temperature and normal pressure. In the invention, two times of isovolumetric impregnation are adopted for modifying honeycomb activated carbon. Firstly, cuprous chloride mixed solution using an amine-containing solvent is used as a modifier, and the cuprous chloride mixed solution is loaded on a carrier by isovolumetric impregnation; and secondly, the carrier is dried, and oxidizing activation is performed by isovolumetric impregnation with a strong oxidant solution. The honeycomb activated carbon has the characteristics of high NOx conversion and absorption efficiency, high absorption capacity, low cost, simple preparation process and the like.

The invention belongs to the field of gas purification and provides a novel absorption solution for removing H2S, COS, mercaptan, thioether and other sulfides, as well as CO2 from natural gas. The absorption solution contains a hindered amine, an alcohol amine, N-methylacetamide, a salt type catalyst and deionized water, wherein the concentration of the alcohol amine is 15-40% (wt), and the concentration of the hindered amine is 10-60% (wt); the hindered amine can be a single steric hindered amine or a mixture of a variety of steric hindered amines, and the hindered amine is a non-linear alcohol amine type compound bringing one or more steric hindered structures on nitrogen atoms; the concentration of the N-methylacetamide is 5-30% (wt); the concentration of the salt type catalyst is 0.1-5%. Compared with a traditional alcohol amine solvent, the absorption solution provided by the invention has the significant advantages of high desulfurization rate, low energy consumption for regeneration, good stability, cheap price and the like.

The invention discloses a CO2-enriched amine solution regeneration energy consumption reducing novel catalytic desorber. Compared with traditional desorbers, the CO2-enriched amine solution regeneration energy consumption reducing novel catalytic desorber introduces a catalytic reactor into a traditional CO2 desorption process without changing the technical process, the pipe layout, the heating manner and the like of the traditional desorbers; the catalytic reactor is filled with solid catalysts, CO2-enriched amine solution enters into the catalytic reactor via the bottom of the catalytic reactor under the action of a pump, and through full contact between the catalysts and the CO2-enriched amine solution, the performance of the catalysts can be maximized. The CO2-enriched amine solution regeneration energy consumption reducing novel catalytic desorber is mainly composed of the catalytic reactor and a packed tower; introduction of acid catalysts accelerates the regeneration rate of theCO2-enriched amine solution, reduces the regeneration temperature and accordingly achieves the aim of high-efficiency and low-energy-consumption regeneration of the CO2-enriched amine solution. The CO2-enriched amine solution regeneration energy consumption reducing novel catalytic desorber is higher in catalytic performance than existing catalytic desorbers and the traditional desorbers.

The present invention comprises a hard surface cleaning composition including an environmentally friendly alkyl amide solvent, derived from renewable bio-based resources that works at least as well as d-limonene. In one embodiment, the present invention is a cleaning composition including an anionic surfactant salt, a saturated C₈ to C₁₀ alkyl amide solvent, a cosolvent and water. The composition is substantially free of d-limonene and can remove red food soils with up to 20 percent protein, and also functions as an asphalt removal composition.

The invention provides a fluorinated graphene reinforced lubricating oil and a preparation method thereof, and relates to the technical field of lubricating oil. The fluorinated graphene reinforced lubricating oil comprises the main materials of 200-300 parts of base oil, 2-5 parts of modified fluorinated graphene, 10-15 parts of oleic acid, 10-15 parts of amine solvent, 20-25 parts of anti-wear phosphating solution, 10-15 parts of trimethylolpropane, 2-3 parts of ammonium borofluoride, 2-3 parts of sodium pyrophosphate, 0.5-1 part of a plasticizer, and 0.5-1 part of an emulsifying agent. Thefluorinated graphene is dispersed in the lubricating oil, the bearing capacity and the wear-resisting property of the lubricating oil are both effectively improved, and the fluorinated graphene reinforced lubricating oil has an excellent application prospect.

The present invention provides a quantum dot material having an inorganic ligand as well as preparation and an application of the quantum dot material. The quantum dot material having the inorganic ligand is characterized in that the preparation method of the quantum dot material comprises the following steps: preparing an inorganic ligand solution; mixing quantum dots having a long-chain organicligand on the surface and the inorganic ligand solution, and performing stirring for ligand exchange; and adding a poor solvent to precipitate the quantum dots subjected to ligand exchange, performingcentrifugation to remove a supernatant, adding an amine solvent into a precipitate, and adding a sulfide cosolvent to complete dissolution, so as to obtain the quantum dot material having the inorganic ligand. According to the method provided by the present invention, quantum dots are dissolved into the amine solvent after being exchanged with the inorganic ligand, and the method can realize spincoating film formation, is convenient for operation, prepares a light emitting layer and a transport layer in a room-temperature air environment, and has possibility of mass production; and a quantumdot electroluminescent device prepared by the quantum dot material has a lower turn-on voltage, and a film prepared from the ligand-exchanged quantum dots has fluorescence thermal stability.

The invention discloses a high selectivity metal organic skeleton material and a preparation method thereof. The preparation method comprises the following steps: adding an organic ligand namely 2,7-bis(3,5-dibenzoic acid)-9-fluorenone, carbon nanotubes, and a copper source into an amine solvent and deionized water, evenly stirring in an enclosed container; then adding a nitric acid solution, evenly mixing, transferring the enclosed container to a baking oven to carry out crystallization; subjecting the obtained blue-green hexagonal crystals to multi-stage solvent extraction and solubilization treatments with N,N'-dimethyl formamide and methanol in sequence, and performing vacuum drying to obtain the pure metal organic skeleton material. The metal organic skeleton material comprises a secondary structural unit, which is formed through coordination between a Cu2(COO)4 structural unit and oxygen atoms of carboxylic acid. The secondary structural units are linked to each other so as to form a three dimensional channel structure. The provided high selectivity metal organic skeleton material is especially suitable for selective adsorption separation of mixed gas (acetylene, ethylene, and ethane), the operation conditions are mild, and the service life is long.