14results about How to "Strong complexing ability" patented technology

The invention relates to the technical field of water treatment, and discloses a water treatment agent for oilfield reinjection water and a preparation method thereof. The water treatment agent for oilfield reinjection water is obtained by copolymerization of sulfonic imidazoline quaternary ammonium salt modified quinoline, Mannich base modified chitosan, acrylic acid and sodium hypophosphite. The water solubility and corrosion inhibition of imidazoline are improved through quaternization modification of imidazoline, quaternary ammonium salt imidazoline can be adsorbed on the metal surface, the corrosion rate is reduced, the quaternary ammonium salt imidazoline serves as a surface active agent, the infiltration and dispersion effects are achieved, and the descaling rate is increased; the sulfonic acid group improves the temperature resistance and prevents the generation of gel, and the strong hydrophilicity of the sulfonic acid group enables a molecular chain to fully stretch in water, so that the scale inhibition performance is improved; mannich base is introduced into chitosan, the acid solubility and temperature resistance of chitosan are improved, the coordination chelation effect of chitosan is enhanced through the conjugation effect of aromatic rings, and the corrosion inhibition effect is improved; various functional groups play a synergistic effect, so that the corrosion and scale inhibition effect is further enhanced.

The present invention discloses a nonionic polyether type polymer surfactant and a preparation method and application thereof. The nonionic polyether type polymer surfactant is obtained by esterification modification or etherification modification of the secondary hydroxyl group of the chain polyether type polymer surfactant and is used as a soaping agent for cotton fabrics. The nonionic polyether type polymer surfactant prepared by the present invention has strong adsorption performance, complexing ability and colloid protection performance, etc., can have a strong binding ability with dyes during soaping, has a strong removal effect on floating color on the surface of fabrics, makes the washed dyes stably exist in the washing liquid, no longer stains the fabrics, and effectively avoids the occurrence of flocculation and precipitation.

The application relates to the field of new energy material preparation technology, and particularly discloses a method for synthesizing manganese iron phosphate from phosphating slag and application of the manganese iron phosphate in a positive electrode material. The method for synthesizing manganese iron phosphate from phosphating slag comprises the following steps: S1. Taking phosphating slag to detect the manganese and iron contents, dissolving the phosphating slag in concentrated phosphoric acid to obtain clear filtrate A; S2. According to the manganese and iron contents measured in S1, a divalent manganese salt and a ferrous salt are weighed and added into the filtrate A to obtain filtrate B; S3. A soluble zinc salt and a complexing agent are added into dilute phosphoric acid to configure a bottom solution; S4. The filtrate B is slowly added into the bottom solution to obtain manganese iron phosphate precipitate; and S5. Manganese iron phosphate powder is obtained. The manganese iron phosphate powder synthesized from the phosphating slag is used as raw material, mixed with lithium carbonate and glucose, pure water is added, sand grinding is carried out, spray drying is carried out, and sintering is carried out under the protection of a nitrogen atmosphere to obtain a manganese iron lithium phosphate positive electrode material, and the problems of low resource utilization efficiency of the phosphating slag and poor synthesis effect of the manganese iron phosphate are solved.

The invention relates to the technical field of oilfield exploitation, and provides a rare earth complex trace element tracer agent for oilfield development. The method comprises the following steps: firstly, preparing a complexing agent aqueous solution, and dissolving a selected complexing agent in a proper amount of water to obtain the complexing agent aqueous solution; preparing a rare earth salt aqueous solution, reacting the rare earth element powder with dilute acid to generate rare earth salt precipitate, extracting the rare earth salt precipitate, performing evaporative crystallization, drying and crushing to obtain rare earth salt powder, and dissolving the rare earth salt powder in a proper amount of water to obtain the rare earth salt aqueous solution; and then adding the rare earth salt aqueous solution into the complexing agent aqueous solution, placing the mixed solution in a water bath at the constant temperature of 90 DEG C, uniformly stirring, continuously carrying out complexing reaction for 3 hours, crystallizing, crushing and drying to obtain the rare earth complex trace element tracer agent.

The application relates to a preparation method of a sodium ion battery positive plate, and belongs to the technical field of new energy batteries. The specific scheme comprises the following steps: step one, uniformly dispersing Prussian blue positive materials and organic solvents to obtain slurry A; the organic solvents comprise a combination of one or more of N-methyl pyrrolidone, polyvinyl pyrrolidone and nitriles; step two, adding a binder into the slurry A and uniformly stirring to obtain slurry B; step three, adding a conductive agent into the slurry B and uniformly stirring to obtain slurry C; removing bubbles from the slurry C and adjusting the viscosity to obtain slurry D; step four, coating the slurry D on a positive current collector, baking, rolling, cutting and obtaining the sodium ion battery positive plate. The application can prevent subsequent glue liquid from entering Prussian blue cavities, can effectively guarantee the adhesive glue amount attached to the surface of active materials, can prevent positive electrode cold pressing and formation demolding, and can solve the problem of the battery cell manufacturing process.

The invention belongs to the technical field of polyurethane synthesis, and particularly relates to a catalyst for synthesizing hard polyurethane and a preparation method of the catalyst. According to the catalyst, bismuth iso-octoate is taken as a matrix, hydroxypropyl methyl cellulose is firstly adsorbed on the surface of bismuth iso-octoate, and then 2-aminoterephthalic acid and bismuth iso-octoate are complexed at a certain temperature, so that the bismuth iso-octoate can better exert catalytic activity and selectivity, and the generation of byproducts is inhibited; furthermore, a polyurethane product has excellent mechanical properties, and the catalyst is more suitable for preparing a hard polyurethane material.

The invention discloses a method for recovering metal lithium in a waste lithium battery positive electrode material, which comprises the following steps: dissolving a lithium ion battery positive electrode material to be recovered in a nitric acid solution to prepare a stock solution to be recovered; the stock solution to be recovered is sampled into a filler chromatographic column, filler is polyacrylonitrile fiber modified by amination of diethylenetriamine, and effluent within six column volumes is collected; and replacing the filler chromatographic column and continuously repeating the process until all the to-be-recycled samples are treated, thereby completing the recycling of the metal lithium in the waste lithium battery material. According to the method, the recovery rate of Li is increased to the greatest extent.

The invention provides a method for preparing nano calcium carbonate through amine cycle by capturing carbon dioxide through ferronickel slag, and belongs to the technical field of waste resource utilization and carbon dioxide capture and utilization. The method comprises the following steps: mixing ferronickel slag powder with an ammonium chloride solution, and performing leaching reaction to obtain a mixed solution; adding ammonium hydroxide into the mixed solution to adjust the pH value, and filtering to obtain a leaching solution; introducing the flue gas into an ammonia water absorption tower to prepare an ammonium bicarbonate solution; the ammonium bicarbonate solution and the leachate are subjected to a carbonization reaction, nano calcium carbonate is obtained, ammonia gas generated by the carbonization reaction is recycled to an absorption tower to be reused, and a closed amine circulation system is formed. According to the amine circulation method, efficient utilization of CaO in the ferronickel slag can be achieved, meanwhile, CO2 in the flue gas is captured, the purity of obtained nano calcium carbonate is larger than or equal to 93%, the whiteness is larger than or equal to 94%, the nano calcium carbonate has the advantages of being small in particle size, good in dispersity and high in additional value, and cooperative utilization of high-additional-value recycling of the ferronickel slag and carbon dioxide emission reduction is achieved.

The present invention belongs to the field of chemistry and environmental technology, and relates to an electric field-assisted cyanated MOFs and graphene aerogel composite uranium adsorption material and a preparation method thereof. The present invention uses the prepared electric field-assisted uranium adsorption composite material as a raw material to prepare a uranium adsorption electrode. Metal ions cross-link with oxygen in carboxyl groups to form porous MOFs materials, which can increase porosity and increase active sites, thereby improving its adsorption performance. By combining porous MOFs materials with graphene aerogels, the aggregation of MOFs materials is effectively weakened, the utilization of adsorption sites is improved, and the adsorption performance of uranium is greatly improved. The adsorption material prepared by the present invention has abundant cyano groups, has adsorption selectivity for hexavalent uranium, and can also preferentially select uranium for adsorption when other ions coexist.

The application relates to the technical field of supramolecules, in particular to a pillar[n]arene derivative-DCOIT slow-release supramolecular self-assembly body, application and a preparation method. The supramolecular self-assembly body loads DCOIT by taking a pillar[n]arene derivative as a molecular carrier; the pillar[n]arene serving as the carrier can form a supramolecular assembly body with DCOIT through hydrogen bond interaction between pi and CH2, the host-guest complexation of the two is strong, and the pillar[n]arene derivative can effectively control the slow release of DCOIT; the supramolecular self-assembly body is good in safety and stability, low in cost, beneficial to industrialized production, and wide in application field; the method is simple in operation, low in preparation cost, easy to realize, and beneficial to industrial promotion.

The invention relates to the technical field of magnesium alloy surface treatment, in particular to a bright pickling additive for magnesium alloy containing heavy metal elements and a preparation method of the bright pickling additive. Comprising the following components: 5 g / L of potassium fluotitanate, 10 g / L of sodium metavanadate, 50-70 g / L of ammonium bifluoride, 30-50 g / L of sodium metasilicate nonahydrate, 100-200 mL / L of lactic acid and 50-70 mL / L of phytic acid, by adding the potassium fluotitanate, the potassium fluotitanate is reduced into TiO2 when making contact with a metal magnesium alloy matrix, so that the surface potential of a workpiece is balanced, the polishing effect is achieved, and by adding the ammonium bifluoride, the surface of the workpiece is not prone to being damaged. By adding sodium metasilicate nonahydrate, dirt formed on the surface of a magnesium alloy workpiece due to precipitates formed by metal ions such as Cu and Ag is reduced, and by adding sodium metasilicate nonahydrate, generation of heavy metal cation precipitates is reduced, so that dust on the working surface is reduced. The cleaning agent can be matched with low-concentration inorganic strong acid and organic acid to perform bright cleaning on magnesium alloy surfaces containing various heavy metals in different processing states under the environment operation from low temperature to medium temperature.

The application provides an electrolyte, a lithium ion battery and a power device, the electrolyte comprising a solvent, a lithium salt and an additive; wherein the solvent comprises a fluoroether, a carbonate compound and a carboxylic acid ester compound, and the mass ratio of the fluoroether, the carbonate compound and the carboxylic acid ester compound is (10-20):(40-65):(20-45); and the additive comprises a first additive, and the first additive is a tetranitrile compound as shown in formula I. Compared with the prior art, the electrolyte of the application adds the fluoroether in the solvent, so that a SEI film with better toughness can be formed on the metal lithium negative electrode side, thereby improving the stability of the metal lithium negative electrode interface; meanwhile, the tetranitrile compound is also added as the additive, which can effectively improve the stability of the positive electrode, and cooperates with the fluoroether to effectively balance the transmission rate of lithium ions, effectively improves the lithium dendrite problem prone to occur in the metal lithium negative electrode system, and thereby improves the cycle life and safety performance of the battery.

The present invention belongs to the technical field of flue gas desulfurization, discloses a dual-function desulfurization catalyst and its preparation method and application, and solves the technical problems of low cost and low desulfurization efficiency of dual-function desulfurization catalyst in the prior art. The dual-function desulfurization catalyst is used to remove COS and H2S in flue gas at low temperature. The preparation method of the dual-function desulfurization catalyst includes the following steps: impregnating activated carbon in a first modification solution, filtering, drying and heat-treating after the impregnation is completed; the first modification solution contains urea and at least one of soluble copper salt, iron salt and zinc salt; impregnating activated carbon in a second modification solution, filtering, drying and heat-treating after the impregnation is completed, and obtaining a dual-function desulfurization catalyst; the second modification solution contains alkali metal salt and / or alkali.