15 results about "Solid phase adsorption" patented technology

The invention discloses a method for separating vanadium and iron in a high-iron-vanadium electrolyte. The method comprises the steps of pH regulation and control, iron removal, vanadium extraction and vanadium reverse extraction. In the step of iron removal, an iron ion targeted complexing agent and a solid phase adsorbent are added into the high-iron vanadium electrolyte with the pH adjusted, reaction is conducted for 10-15 min under stirring, then direct filtering is conducted, and low-iron vanadium electrolyte and a solid phase are obtained; in the vanadium extraction step, vanadium in the low-iron vanadium electrolyte is extracted by adopting a mixed solvent of pretreated P204, TBP and sulfonated kerosene, and a vanadium-containing organic solution is obtained; and the vanadium reverse extraction comprises the step of carrying out reverse extraction on the vanadium-containing organic solution through a sulfuric acid solution with the concentration of 2.0-5.0 mol / L to obtain a vanadium electrolyte. The method can be used for treating iron ions in all valence states, particularly ferric ions which are easier to extract than vanadium ions, qualified vanadium electrolyte with the iron ion concentration meeting the industrial standard can be directly obtained after reverse extraction, and a complexing agent and an adsorbent can be recycled.

This invention discloses a covalent organic framework material for selective solid-phase adsorption and separation, its preparation method, and its applications. The material is prepared by polycondensation reaction of electron-deficient triazine rings with short-chain linkers such as hydrazine hydrate, forming a layered structure with a high specific surface area of ​​602 m² / g and a concentrated pore size of 2.0 nm to 3.0 nm. This structure exhibits high adsorption capacity (up to 1.0 mg / g), rapid adsorption kinetics, and excellent selectivity for PAHs in organic solutions through strong π-π interactions and pore confinement effects. The preparation process is simple and the conditions are mild. The material has good thermal stability (>300℃), and its performance retention rate is higher than 92% after 5 cycles. When applied to the solid-phase adsorption of PAHs in petroleum products such as lubricating oil and white oil, it effectively eliminates matrix interference, allowing direct analysis without complex purification steps after adsorption. This overcomes the limitations of traditional materials such as silica gel and activated carbon, which have weak adsorption capacity and require cumbersome post-treatment, providing a new high-performance adsorption material solution for the efficient detection of trace PAHs in petroleum products.

This invention discloses a resource recovery system for dredged sediment treatment based on ultrasonic extraction and flotation synergy, comprising: a pretreatment unit, a first-stage ultrasonic extraction reaction unit, a second-stage solid-phase adsorption reaction unit, a third-stage flotation separation unit, a dewatering unit, a residual water treatment unit, and a nitrogen and phosphorus recovery unit. It also discloses a resource recovery method for dredged sediment treatment based on ultrasonic extraction and flotation synergy. This invention solves the problems of low pollutant removal rate, high risk of secondary pollution of dredged soil, and limited resource recovery in traditional dredged sediment treatment. Through the synergistic effect of multiple units including "ultrasonic-liquid-solid-phase adsorption-micro-nano bubble flotation," it achieves efficient release of nitrogen and phosphorus, simultaneous removal of microplastics, rapid separation of clean sediment from polluted phases, and recovery of nitrogen and phosphorus for fertilizer production and resource recovery of clean sediment. The entire process is green and low-consumption, suitable for compact layout on water or near shore, and can simultaneously meet the requirements of sediment reduction, harmlessness, and resource recovery.

This application discloses an integrated gas invasion control method that combines inhibition and absorption, applied to wellbores experiencing gas invasion. The method includes the following steps: constructing a composite slurry column system in the wellbore, comprising, from bottom to top, a gas-intake slug and a gas-enhancing slug; the gas-intake slug converts free gas into a solid-phase adsorbed state or a liquid-phase dissolved state by adding gas-intake material to the drilling fluid, thereby reducing the gas volume in situ within the wellbore; the gas-enhancing slug triggers viscosity enhancement when residual gas enters by adding a gas-responsive material to the drilling fluid, increasing fluid resistance and mitigating gas slippage. This application achieves a synergistic gas control effect through a segmented composite slurry column system, first reducing gas volume through absorption and then increasing viscosity and reducing gas flow rate, enabling early proactive intervention in gas invasion, avoiding fluid instability and gas channeling risks, and improving well control success rate.

This invention provides a method for efficiently producing γ-dodecalactone shown in formula (1) below, using a two-step method employing different microorganisms, and a method for purifying the obtained product. [Solution] A composition containing γ-dodecalactone, shown in formula (1) below, is obtained by first culturing lactic acid bacteria obtained from camellia petals using saponified camellia oil as a raw material, and then treating the resulting primary culture with yeast obtained from camellia petals. Subsequently, the obtained product is purified by adsorption onto a solid phase to obtain a composition containing γ-dodecalactone with less malodorous odor. [Formula 1] JPEG2026062594000007.jpg2194

The application discloses a kind of integrated gas invasion control methods of retardation absorption, applied to the wellbore of gas invasion, comprising the following steps: composite slurry column system is constructed in wellbore, the composite slurry column system includes gas absorption plug and gas encountering viscosity increasing plug from bottom to top;The gas absorption plug converts free gas into solid adsorption state or liquid solution state by adding gas absorption material in drilling fluid, and reduces the volume of gas phase in wellbore in situ;The gas encountering viscosity increasing plug triggers viscosity increase when residual gas enters by adding gas encountering response material in drilling fluid, increases fluid resistance, slows down gas phase slip.This application realizes the synergistic gas control effect of first absorption reduction and then viscosity increase and speed reduction through the segmented composite slurry column system, realizes early active intervention of gas invasion, avoids fluid instability and gas channeling risk, and improves kill success rate.

The present application relates to the technical field of drilling fluid detection, in particular to a green drilling fluid environmental protection performance comprehensive test evaluation method, comprising: configuring a standardized environment simulation reactor, injecting a green drilling fluid sample to be tested and a simulated environment medium containing fresh water sediments, salt water sediments and land soil, separating the whole system liquid-solid mixture after leaching reaction under constant temperature and frequency conditions to obtain filtrate and solid residue. The filtrate is subjected to full component spectrum scanning, compared with a standard spectrum library to identify target pollutants and preliminary concentration interval; the residue is subjected to thermal analysis and gas phase capture, data is imported into a pollutant migration and transformation prediction model, combined with medium physicochemical parameters to calculate solid phase adsorption retention and long-term release potential, and the solid phase occurrence state of pollutants is evaluated. The method can adapt to multi-element environment simulation, completely detect liquid-solid two-phase pollutants, accurately identify pollutants and quantify solid phase occurrence characteristics, and realize comprehensive evaluation of drilling fluid environmental protection performance.

The application discloses a kind of iodine-loaded antibacterial starch nanofiber membrane and preparation method thereof.The method is mixed and handled after starch, strong alkali and ethanol aqueous solution, and then the precipitate is dissolved in water to prepare starch solution, and the starch electrospinning solution is obtained after high-temperature steam cooking, then electrospinning is prepared starch nanofiber membrane, finally solid-phase adsorption iodine vapor to obtain starch-iodine nanofiber membrane.The average fiber diameter of the starch-iodine nanofiber membrane obtained by the application is 127-141 nm, the iodine content is 11.43%-17.00%, and the antibacterial efficiency of staphylococcus aureus and salmonella is highly sensitive, with high antibacterial efficiency, which can be applied to antibacterial wound dressings, tissue scaffolds and food packaging and other fields.

The application discloses a kind of based on ultrasonic extraction floatation cooperation's dredged sediment treatment resource system, comprising: pretreatment unit, first stage ultrasonic extraction reaction unit, second stage solid-phase adsorption reaction unit, third stage floatation separation unit, dehydration treatment unit, residual water treatment unit and nitrogen and phosphorus recovery unit.It also discloses a kind of based on ultrasonic extraction floatation cooperation's dredged sediment treatment resource method.The application solves the problems of low pollutant removal rate, high risk of secondary pollution of dredged soil and limited resource utilization in traditional dredged sediment treatment.Through the cooperation of "ultrasonic-liquid extraction-solid-phase adsorption-micro-nano bubble floatation" multi-unit, efficient release of nitrogen and phosphorus, simultaneous removal of microplastics, rapid separation of clean silt and pollution, and recycling of nitrogen and phosphorus for fertilizer production, the application realizes the resource utilization of clean silt.The whole process is green and low in consumption, suitable for compact arrangement on water or near shore, and can simultaneously meet the needs of sediment reduction, harmless and resource utilization.

The application relates to a preparation method of a solid-phase adsorption resin and application of the solid-phase adsorption resin in uranium purification, and the preparation method comprises the following steps: (1) taking triethylamine, carbodiimide hydrochloride and 1-hydroxyphenyltriazole as catalysts, carrying out a substitution reaction of nitrilotriacetic acid and dialkylamine in dichloromethane solvent, drying a reaction product, and removing impurities through reduced pressure distillation to obtain a polyamide ligand product; and (2) loading the polyamide ligand onto a P120 carrier through a vacuum impregnation method to obtain the solid-phase adsorption resin. The solid-phase adsorption resin is suitable for deep purification of trace plutonium in a large amount of uranium, is suitable for a wide concentration range of uranium, plutonium and acid, has high purification depth, and is simple to operate, and is superior to existing related field separation materials.

The invention discloses a veterinary drug residue detection method, and belongs to the technical field of food detection. According to the method, a sample is extracted by acidizing acetonitrile, and multiple types of veterinary drugs in an extracting solution are selectively extracted and purified innovatively by adopting a specifically synthesized deep eutectic solvent, so that a traditional solid-phase adsorption step is replaced. After multi-phase separation is formed through vortex and centrifugation, a deep eutectic solvent phase of an enriched target object is reserved, re-extraction is performed with an ammoniated solvent, and finally liquid chromatography-tandem mass spectrometry analysis is performed. According to the method, the pretreatment time is shortened to be within 20 minutes, the use of organic solvents and consumables is remarkably reduced, and the stable recovery rate of 75%-115% and the relative standard deviation of less than 15% are shown for veterinary drugs such as beta-receptor stimulants, sulfonamides and quinolones in various animal matrixes. The method has the advantages of rapidness, economy, environmental protection and good reproducibility, and is suitable for multi-residue high-throughput detection of veterinary drugs.

The application belongs to the technical field of sewage purification, and discloses a manganese metal organic cluster liquid, a preparation method thereof and application of the manganese metal organic cluster liquid in water purification. The preparation method comprises the following steps: uniformly mixing a manganese acetate solution and a 1,3,5-benzene tricarboxylic acid solution; wherein the molar ratio of the manganese acetate to the 1,3,5-benzene tricarboxylic acid is (2-5):1; then performing a hydrothermal reaction, washing and drying the product to obtain a rod-shaped Mn-BTC powder; dispersing the rod-shaped Mn-BTC powder in water to obtain a transparent manganese metal organic cluster liquid; wherein the mass ratio of the rod-shaped Mn-BTC powder to water is (0.005-0.02):10. The unique feature of the Mn-MOC liquid lies in its completely exposed adsorption and active sites, which enables it to uniformly adsorb target ions and avoids the problem that active sites are shielded in traditional solid-phase adsorbents. The application overcomes the shortcomings of heterogeneous adsorption seen in traditional solid-phase adsorbents, not only brings a new solution to the field of water purification, but also provides a new idea for environmental remediation and sustainable development.

The invention discloses a dialysis bag-based Fe-CPS complex extraction method and application thereof, and belongs to the technical field of water treatment and environmental protection. The method comprises the following steps: inoculating microorganisms into an inorganic salt culture medium containing water-containing iron ore, and carrying out cell disruption, centrifugation and filtration to obtain a solution containing an Fe-CPS complex; then a dialysis bag with the molecular weight cut-off of 100 Da is adopted for separation and enrichment, free iron ions and small molecular impurities can be effectively removed, and selective cut-off of the complex is achieved. The method is mild in condition and simple and convenient in flow, organic solvent extraction or solid-phase adsorption materials are not adopted in the enrichment and separation process, driving is not depended on transmembrane pressure, and the structural integrity and photochemical activity of the Fe-CPS complex can be remarkably kept. The obtained Fe-CPS complex can be used for photodegradation of steroid estrogen 17 beta-estradiol (E2) in a water body. According to the invention, stable extraction and effective application of the Fe-CPS complex are realized, and technical support is provided for related environmental research and photochemical removal of pollutants.

The invention relates to the technical field of organic synthesis, in particular to a preparation method of tertiary butylperoxy-2-ethylhexyl carbonate with high active oxygen content. The invention overcomes the problems of low active oxygen content and low yield of the product in the prior art. The preparation method comprises the following steps: firstly, carrying out inclusion stabilization on tert-butyl hydroperoxide by using methyl-beta-cyclodextrin to construct a premixed solution; then introducing a modified catalyst into a composite solvent environment composed of isododecane and hydrofluoroether, and dropwise adding chloroformic acid-2-ethylhexyl ester through a low-temperature high-shear process to complete the reaction; and finally, carrying out solid-phase adsorption impurity removal by utilizing the modified hydrotalcite, and distilling to obtain the tert-butylperoxy-2-ethylhexyl carbonate. According to the method, interface heat and mass transfer is improved through the composite solvent, the reaction rate is increased through high-activity sites of the modified catalyst, anhydrous deacidification and dechlorination are achieved in cooperation with the modified hydrotalcite, raw material hydrolysis and peroxide bond thermal decomposition are effectively inhibited through the synergistic process, and the method has excellent industrial application value.

The present application belongs to the technical field of analytical chemistry, and particularly relates to a kind of multi-dimensional layered material and its preparation method and application.The preparation method of the multi-dimensional layered material of the present application comprises: (1) lithium fluoride and titanium carbon aluminum are dissolved in hydrochloric acid-water solution respectively, and the two are mixed to react, Ti3C2 is obtained; (2) polyvinylpyrrolidone, sodium hydroxide and hydrazine hydrate are mixed, then added to the mixed solution of Ti3C2 and cobalt salt, reacted, Ti3C2-Co is obtained; (3) then Ti3C2-Co aqueous solution is reacted with chitosan aqueous solution, Ti3C2-Co@chitosan is obtained; (4) finally, Ti3C2-Co@chitosan and pyrrole monomer are reacted, and the multi-dimensional layered material is obtained. When the multi-dimensional layered material prepared by the present application is used to extract samples, the whole adsorption extraction and enrichment resolution process can be completed in only 2 min, and it is a kind of magnetic solid phase adsorbent with good magnetic separation effect, high recycling efficiency and great potential.