14 results about "Hydroxylammonium chloride" patented technology

The invention discloses a preparation method of an arfamarana key intermediate, which comprises the following steps: carrying out nucleophilic addition reaction on a compound I and 1-[3-chloro-5-(trifluoromethyl) phenyl]-2, 2, 2-trifluoroethanone under the action of an organic solvent A and alkali to obtain a compound II; dissolving the compound II in an organic solvent B, adding concentrated sulfuric acid, carrying out intramolecular dehydration and cyanogen hydrolysis, and after the reaction is finished, cooling to room temperature for crystal growing to obtain a compound III; dissolving the compound III in an organic solvent C, carrying out intramolecular cyclization and ester hydrolysis reaction on the compound III and hydroxylamine hydrochloride under the action of a certain amount of sodium hydroxide aqueous solution, and after the reaction is finished, collecting a water phase and adjusting the pH value of the water phase, so as to obtain the key intermediate of arfampanaga. The reaction in each step has a high conversion rate, the purity of the prepared arfamarin intermediate is high, and powerful support and guarantee are provided for preparation of high-purity arfamarin.

Treatment fluids and methods for dissolving titanium-iron oxides and iron oxides in a wellbore. A treatment fluid includes an activator selected from the group consisting of chlorophyll, pheophytin, hydroxylammonium chloride, dopamine, crown ethers, cryptands, ethanoloamine, trihydroxamate-containing siderophores, salts thereof, and any combination thereof, an acid and / or acid-generating agent, and an aqueous base fluid. The treatment fluid contacts a titanium-iron oxide and / or iron oxide to dissolve the titanium-iron oxide and / or iron oxide.

This invention discloses a method for preparing lithium iron phosphate cathode material and the lithium iron phosphate cathode material itself, belonging to the field of lithium battery technology. The preparation method includes the following steps: adding lithium source, iron source, and phosphorus source to a solvent to obtain a lithium iron phosphate precursor solution; adding epoxidized polyvinylidene fluoride and polyacrylonitrile to the lithium iron phosphate precursor solution, and electrospinning to obtain precursor fibers; adding hydroxylamine hydrochloride to deionized water and adjusting the pH to 7.0 with sodium carbonate to obtain a treatment solution; adding the precursor fibers to the treatment solution and stirring at 65-75℃ for 4-6 hours to obtain a amine-oxime precursor fiber; S4, adding the amine-oxime precursor fiber to a silver nitrate solution, stirring for 1.5-2 hours, removing, drying, heat-treating, and calcining to obtain the lithium iron phosphate cathode material. The lithium iron phosphate cathode material of this invention exhibits significantly enhanced conductivity and excellent capacity and cycle stability.

The invention relates to the technical field of oilfield chemistry, in particular to a reductive gemini surfactant, a preparation method thereof and an auxiliary for low-temperature reservoir fracturing, and the preparation method of the reductive gemini surfactant comprises the following steps: dissolving a required amount of 2, 3-epoxypropyl-N, N-dimethyl alkyl ammonium chloride in water, introducing nitrogen to remove oxygen, adding a required amount of hydroxylamine hydrochloride, and stirring to obtain the reductive gemini surfactant. And reacting to obtain the reducing gemini surfactant. The invention provides a reducing gemini surfactant and an auxiliary agent for low-temperature reservoir fracturing, which takes the reducing gemini surfactant as a raw material. The additive for low-temperature reservoir fracturing has the functions of a low-temperature gel breaking activator and a discharge aiding agent, can realize thorough gel breaking at the low temperature of 5-50 DEG C, can ensure that a gel breaking solution efficiently flows back to the ground, and has remarkable practical significance in cost reduction and efficiency improvement of oilfield development.

Treatment fluids and methods for dissolving titanium-iron oxides and iron oxides in a wellbore. A treatment fluid includes an activator selected from the group consisting of chlorophyll, pheophytin, hydroxylammonium chloride, dopamine, crown ethers, cryptands, ethanoloamine, trihydroxamate-containing siderophores, salts thereof, and any combination thereof, an acid and / or acid-generating agent, and an aqueous base fluid. The treatment fluid contacts a titanium-iron oxide and / or iron oxide to dissolve the titanium-iron oxide and / or iron oxide.

The invention discloses a low-temperature homogeneous synthesis method and application of amidoxime polyacrylonitrile, and the method comprises the following steps: dissolving polyacrylonitrile powder in an organic solvent to obtain a polyacrylonitrile solution; adding hydroxylamine hydrochloride into an organic solvent to be completely dissolved, adding organic amine, and continuously stirring to obtain a transparent solution; dropwise adding the transparent solution into the polyacrylonitrile solution, timing at the beginning of dropwise adding until the reaction is finished, and reacting for 6-12 hours to prepare an amidoxime-based polyacrylonitrile organic solution; adding the amidoxime-based polyacrylonitrile organic solution into methanol, deionized water or isopropanol, separating out amidoxime-based polyacrylonitrile, and filtering, washing and freeze-drying the separated product to obtain amidoxime-based polyacrylonitrile powder. According to the method, the reaction temperature for preparing the amidoxime-based polyacrylonitrile is obviously reduced, the reaction time is shortened, the energy consumption and the production cost are reduced, and the engineering application of the amidoxime-based polyacrylonitrile material is promoted.

The invention belongs to the technical field of water-based rechargeable batteries, and particularly relates to a high-entropy electrolyte of a water-based zinc ion battery capable of being used in a high-temperature environment. Any one or a combination of two of phenanthroline and hydroxylamine hydrochloride is added into the high-entropy electrolyte, and the concentration of the phenanthroline and the hydroxylamine hydrochloride is 0.01-3 g / L. The phenanthroline in the high-entropy electrolyte can strongly interact with the zinc ions, so that the solvation structure of the hydrated zinc ions is changed, the problems of hydrogen evolution and corrosion caused by high-temperature desolvation of the hydrated zinc ions are relieved, and the deposition / stripping kinetics of the zinc ions is enhanced, so that the generation of dendritic crystals is inhibited. The hydroxylamine hydrochloride has a hydroxyl functional group and can interact with the solvent water, so that the hydrogen bond strength of the water is changed. The aqueous zinc ion battery assembled by using the high-entropy electrolyte can be used in a severe high-temperature environment, the safety problems of liquid leakage, gas expansion, explosion and the like of the battery at an extremely high temperature can be effectively relieved, the cycling stability of the battery is improved, and the service life of the battery is prolonged.

The invention relates to the technical field of oilfield chemistry, in particular to a reductive tetrahydroxy quaternary ammonium salt, a preparation method thereof and a low-temperature reservoir fracturing fluid assistant.The reductive tetrahydroxy quaternary ammonium salt is prepared according to the following steps that firstly, a needed amount of 2, 3-epoxypropyl trimethyl ammonium chloride is dissolved in water, and a reaction solution is obtained; and 2, introducing nitrogen into the reaction solution to remove oxygen, adding a required amount of hydroxylamine hydrochloride to obtain a reaction mixed solution, and reacting to obtain an aqueous solution of the reductive tetrahydroxy quaternary ammonium salt. The reductive tetrahydroxy quaternary ammonium salt provided by the invention has high reducibility, simultaneously contains four cations and four hydroxyls, and has the characteristics of strong polarity, small molecular weight and high charge density. The low-temperature reservoir fracturing fluid additive prepared by taking the reductive tetrahydroxy quaternary ammonium salt as a raw material has dual functions of a low-temperature activator and a clay stabilizer, and can be used for low-temperature reservoir fracturing transformation.

The invention discloses a preparation method and application of an electrochemical seawater uranium extraction graphite felt electrode material, and belongs to the technical field of electrode materials. S2, preparing cyano diazonium salt; s3, taking the pretreated graphite felt as a substrate, taking cyanobenzene diazonium salt as a raw material, and growing the cyanobenzene diazonium salt on the graphite felt by adopting an electrochemical in-situ grafting method to obtain a p-cyanobenzene functional group loaded graphite felt; and S4, putting the graphite felt loaded with the cyanogen functional group into an alkaline alcohol solution of hydroxylamine hydrochloride, and carrying out a heating reaction to obtain the oximation functional group modified graphite felt electrode catalyst. According to the preparation method and the application of the electrochemical seawater uranium extraction graphite felt electrode material, the activity and the stability of an electrocatalyst are improved, and the preparation method and the application have important significance in promoting the commercialization process of a seawater electrocatalysis uranium extraction catalyst.

The invention belongs to the technical field of paper pulp bleaching and heavy metal recycling, and discloses a catalyst for catalyzing alkaline hydrogen peroxide paper pulp bleaching and application of the catalyst. The preparation method of the catalyst comprises the following steps: reacting a wood-based material with acrylonitrile to graft cyano groups on the surface, and then adding the wood-based material into a mixed aqueous solution of hydroxylamine hydrochloride and sodium hydroxide to react to graft amidoxime groups on the surface to obtain an amidoxime group modified wood-based material; the wood-based material is soaked in a solution containing cobalt salt for an adsorption reaction, and the catalyst is obtained. When the catalyst is used for catalyzing alkaline hydrogen peroxide paper pulp bleaching, the ISO (International Standardization Organization) whiteness of hydrogen peroxide bleached section paper pulp can be improved by 25-30%; the wood modified by amidoxime adsorbs cobalt ions in wastewater again, so that the service life of the catalyst is prolonged, the economical efficiency of the catalyst is improved, the environmental risk of heavy metal emission is effectively prevented, and the dual purposes of environmental protection and efficient paper pulp bleaching are achieved.

The invention relates to the technical field of novel biological adsorption materials, in particular to amidoxime functional Arabic gum as well as a preparation method and application thereof. The preparation method comprises the following steps: taking epichlorohydrin and diethylenetriamine as cross-linking agents, and introducing an amidoxime functional group on a skeleton of Arabic gum through the synergistic effect of diaminomaleonitrile and hydroxylamine hydrochloride to prepare the amidoxime functional Arabic gum. The amidoxime functionalized Arabic gum provided by the invention is simple, convenient, efficient, green and low in cost, is applied to the field of environmental governance, and particularly has remarkable advantages in treatment and purification of water pollution.

The invention belongs to the technical field of food, and particularly relates to a method for detecting and separating lotus corniculatus glycoside in sedum spectabile. The sedum spectabile H.ohba belongs to a herbaceous plant of the assorted Chinese herbal medicine of the Crassulaceae, and the sedum spectabile H.ohba belongs to the herbaceous plant of the assorted Chinese herbal medicine of the Crassulaceae. The invention aims to improve the utilization value of the sedum spectabile, and provides a method for detecting and separating the toxic substance lotus corniculatus glycoside aiming at the characteristic that the sedum spectabile contains various effective components. The specific method comprises the following steps: crushing dried sedum spectabile, and extracting effective components by adopting an ultrasonic method; the preparation method comprises the following steps: extracting an extract by using a magnetic composite material Fe3O4-PEI-CR, reducing a cyano group in the extract into an aldehyde group, reacting the aldehyde group with hydroxylamine hydrochloride in a magnetic composite material Fe3O4-PEI-CR solution to generate hydrochloric acid, water and aldoxime, detecting the existence of the aldehyde group through color change, and separating the generated aldoxime compound by using the magnetic composite material. The invention establishes a simple, accurate and sensitive method for detecting lotus corniculatus glycoside in sedum spectabile.

The invention discloses an anti-shrinkage amidoximation porous nanofiber membrane as well as a preparation method and application thereof, and belongs to the technical field of functional fiber materials. The preparation method of the anti-shrinkage amidoximation porous nanofiber membrane provided by the invention comprises the following steps: dissolving polyacrylonitrile and polyvinylpyrrolidone in an organic solvent to obtain a spinning solution; carrying out electrostatic spinning on the spinning solution to obtain a PAN / PVP (Polyacrylonitrile / Polyvinyl Pyrrolidone) composite nanofiber membrane; dipping the PAN / PVP composite nanofiber membrane in water, and drying the PAN / PVP composite nanofiber membrane to obtain a PPAN nanofiber membrane; and dipping the PPAN nanofiber membrane in a hydroxylamine reagent to carry out an amidoximation reaction, and carrying out alkali treatment to obtain the anti-shrinkage amidoximation porous nanofiber membrane, the hydroxylamine reagent is prepared by dissolving hydroxylamine hydrochloride and potassium carbonate in an alcohol solvent. The fiber membrane prepared by the invention is excellent in shrinkage resistance, high in specific surface area, high in adsorption capacity and good in dynamics, and has a wide market application prospect in adsorption extraction of uranium.