21results about How to "Addressing Purity Issues" patented technology

The invention belongs to the technical field of thermal barrier coatings, and provides an artificial preparation method of multi-scale aero-engine environment sediment particles. The preparation method comprises the following steps: grinding CMAS original powder into mixture powder; calculating the mass of the required mixture powder according to the powder density of the CMAS original powder and the particle size of the target sediment particles; weighing the mixture powder, and pressing the mixture powder into sheets; in an air suspension furnace, tabletting and melting the mixture powder into balls by adopting a laser; and rapidly cooling to normal temperature to obtain the target sediment particles with the target particle size. The melting process of the CMAS powder is greatly improved, the gas suspension furnace and the laser are used for heating, single CMAS particles with the designed size can be obtained in a short time, the preparation time is shortened, and the preparation cost is effectively reduced.

The invention belongs to the technical field of cell culture, and particularly relates to a culture method for in-vitro amplification of NK cells activated by NK cell exosomes, which comprises the following steps of: after promoting the NK cells to generate a large amount of exosomes by using an electrical stimulation method, filtering, performing ultrafiltration, extracting and purifying the NK cell exosomes by using specific immunomagnetic beads, thereby obtaining the NK cell exosomes activated by the NK cell exosomes. A set of strict detection and quantification standards is established for the exosome by utilizing Western Blot, a BCA method, DLS and NTA technical means, a primary PBMC is obtained by adopting a density gradient centrifugation method, and the high-activity and high-purity NK cell exosome is dynamically added into a cell culture medium in the activation and amplification stages of the PBMC, so that self-activation of the NK cells is realized, the proliferation efficiency of the NK cells is remarkably improved, and the NK cell exosome has a good application prospect. Meanwhile, the safety risk of a culture system is reduced.

The invention provides an all-fiber polarization-maintaining vortex light amplification system. The all-fiber polarization-maintaining vortex light amplification system comprises a polarization-maintaining seed laser output system, a polarization-maintaining mode conversion device, a fiber polarization controller, a mode matcher, a pumping signal beam combiner, a laser diode light source group, a few-mode polarization-maintaining ytterbium-doped fiber, a cladding mode filter and a water cooling plate. High-power and high-stability vortex light beam output is realized through an all-fiber structure, and a laser mode field of incident laser is controlled through the fiber polarization controller, so that eigenvector modes are superposed to generate a vortex light field; meanwhile, the amplified high-power vortex light field is output through the few-mode polarization-maintaining ytterbium-doped optical fiber, crosstalk between modes can be reduced through the few-mode polarization-maintaining ytterbium-doped optical fiber, the problem of polarization purity and mode purity degradation in the power amplification process is solved, and therefore high-power vortex light field output is achieved.

The invention discloses an improved herbicide dicamba preparation method, and relates to the technical field of compound synthesis, the method comprises the following steps: using 2, 5-dichlorophenol as an initial raw material, heating 2, 5-dichlorophenol and a potassium hydroxide solution in an organic solvent to form salt, dehydrating and purifying, then carrying out carboxylation reaction with CO2 under the action of a catalyst, acidifying, distilling, and drying to obtain 3, 5-dichlorophenol; 2, 6-dichlorosalicylic acid is added; according to the method, 2, 3, 6-dichlorosalicylic acid and dimethyl sulfate are subjected to an etherification reaction, a hydrolysis reaction and an acidification reaction, and pure dicamba is obtained. The catalyst comprises K2CO3 and KCl, the purity of the obtained 3, 6-dichlorosalicylic acid is greatly improved, and the consumption of hydrochloric acid is remarkably reduced; according to the method, secondary reaction is adopted in the etherification process, so that 3, 6-dichlorosalicylic acid is completely converted into dicamba, and the product prepared by the method is high in yield, high in purity and relatively strong in controllability.

The invention discloses a nanorod-shaped Cu1.8 S material as well as a preparation method and application thereof. The preparation method comprises the following steps: adding ascorbic acid into a copper ion solution, then adding Na2S or K2S, stirring for reaction, centrifuging and washing to obtain a nanorod-shaped Cu1.8S material; the pH value of the copper ion solution is 2-4. The nanorod-shaped Cu1.8S material belongs to a hexagonal crystal system, the center of Cu and S atoms of the first coordination form three Cu-S coordination with the average bond length of # imgabs0 #, the synthesized material conforms to the crystal form characteristics of Cu1.8S, and the material has application prospects in thermoelectricity, photocatalysis and water treatment.

The invention belongs to the technical field of traditional Chinese medicines, and particularly relates to kadsura pepper stem polysaccharide as well as a preparation process and application thereof. The kadsura pepper stem polysaccharide (KPSP) is extracted by taking kadsura pepper stem as a raw material and combining an ultrasonic-assisted extraction method with a compound enzyme enzymolysis method. The extraction process of the kadsura pepper stem polysaccharide is simple to operate, high in extraction rate and purity, time-saving, efficient and measurable in molecular weight, and the extraction system is mild. Results of the embodiment show that the extracted kadsura pepper stem polysaccharide can enhance the exercise ability and stress ability of CL4176 nematodes, and then the extracted kadsura pepper stem polysaccharide can be applied to preparation of products and / or drugs for improving the exercise ability and stress ability.

This utility model relates to the field of bio-jet fuel technology, specifically a selective collection device for isomeric fractions of bio-jet fuel. The device includes a housing, a rotating assembly, and a tube rack. The bottom of the rotating assembly is located inside one end of the housing, and the end of the tube rack away from the rotating assembly is connected to the housing. This assembly, consisting of the housing, rotating assembly, and tube rack, provides a continuous collection device for isomeric fractions of bio-jet fuel. Through a step-by-step rotation, test tubes used for collecting the fractions pass sequentially below the discharge end of the tube rack. Simultaneously, the device actively lifts the test tubes being collected, bringing the tube opening closer to the discharge end of the fraction, thus reducing the likelihood of external interference during the fraction's descent into the test tube and improving the reliability of fraction collection.

The application discloses a preparation method of a regenerated battery and the regenerated battery, and relates to the technical field of battery recycling and regeneration; and comprises the following steps: obtaining lithium iron phosphate waste and graphite waste based on retired lithium iron phosphate batteries; mixing the lithium iron phosphate waste, lithium carbonate lithium supplement and residual lithium precipitate, adding a composite filling agent and a titanium-lanthanum combined effect modifier for heat treatment to obtain a regenerated lithium iron phosphate material; performing acid pickling, drying and sorting on the graphite waste to obtain graphite powder; obtaining a suspension by mixing the graphite powder, a silane coupling agent and a carboxylated graphene combined agent and a solvent, and performing heat treatment on the suspension to obtain a regenerated graphite material; and preparing a positive electrode sheet and a negative electrode sheet based on the regenerated lithium iron phosphate material and the regenerated graphite material, and assembling the positive electrode sheet, the negative electrode sheet, an electrolyte and a diaphragm into the regenerated battery. The application optimizes the regeneration process of the lithium iron phosphate waste and the graphite waste, so that the electrochemical performance of the regenerated battery is improved.

The present invention belongs to the field of fine chemicals, and discloses an electrochemical method for preparing cis-hexahydrophthalic anhydride from phthalic anhydride in one step. By developing a supported Pt3Rh electrocatalyst for efficient benzene ring hydrogenation, it is highly selectively converted into high-value-added chemical cis-hexahydrophthalic anhydride in one step, thereby realizing resource utilization of phthalic anhydride. The method uses clean and sustainable water as a hydrogen source, with mild reaction conditions and is green and environmentally friendly. With a proton exchange membrane reactor as a reaction device, continuous production can be achieved and catalyst coking and deactivation caused by traditional thermal catalysis can be effectively avoided. The conversion rate of phthalic anhydride, the selectivity of cis-hexahydrophthalic anhydride, and the current efficiency can all reach more than 90%.

The utility model provides a kind of for producing adhesive product feed machine, belong to adhesive product technical field, it solves the technical problem that it is not convenient to clean inside, to cause adhesive to be easily remained in feed machine inside, to the purity and quality of material in subsequent production process are affected.A kind of for producing adhesive product feed machine, including operation platform, operation platform top is fixedly connected with portal frame, two first electric push rods are fixedly connected with symmetry in portal frame top, the same storage box is fixedly connected in the output end of two first electric push rods, feed cylinder is rotatably connected in storage box bottom by screw thread, two second feeding tubes surfaces are each equipped with the supply mechanism for supplying material, piston pad is slidably connected in feed cylinder interior, piston pad top is equipped with the lifting mechanism for lifting piston pad.In the utility model, by the setting of feed cylinder, feed nozzle, piston pad, it can ensure that feed cylinder is convenient to clean.

The invention belongs to the field of industrial wastewater treatment, and discloses a phosphogypsum leachate resourceful treatment system and method. The system comprises an alkali adjustment reaction unit, a nanofiltration unit, a fluorine recovery unit, a reverse osmosis unit and a phosphorus recovery unit. The method solves the technical problem that the purity and the yield of a phosphorus resource recovery product in the phosphogypsum leachate are low due to the influence of fluorine ion interference.

The utility model discloses an angular vibration test device which comprises at least one of a vertical test mechanism and a horizontal test mechanism. The vertical test mechanism is used for loading angular vibration excitation in pitching and rolling directions on the to-be-tested workpiece, the pitching direction is a motion direction rotating around a transverse axis X, and the rolling direction is a motion direction rotating around a longitudinal axis Y; and the horizontal test mechanism is used for loading angular vibration excitation in the yaw direction on the workpiece to be tested, and the yaw direction is the motion direction rotating around the vertical axis Z. The angular vibration test device disclosed by the utility model is scientific in design, can realize single-degree-of-freedom pure angular vibration excitation loading, solves the problem that the existing rotary table cannot simulate a high-frequency angular vibration environment, and has great practical significance.

The utility model provides a pole piece lithium supplementing device and relates to the field of power batteries. The pole piece lithium supplementing device comprises an unwinding shaft; a winding shaft; the melting device comprises a melting crucible used for bearing molten metal and a heating element arranged on the peripheral side of the melting crucible; the coating device comprises a slit extrusion coating head, the slit extrusion coating head is connected and communicated with the smelting crucible, and the end part of the coating head is positioned right above the pole piece; the gas nozzle is located on the side, facing the advancing direction of the pole piece, of the slit extrusion coating head, and the nozzle points to a liquid falling area of the slit extrusion coating head and is obliquely arranged; one end of the pressure gas pipe is connected with an external inert gas source, and the other end of the pressure gas pipe is connected with the smelting crucible. According to the technical scheme, the problems that in the prior art, the lithium supplementing width and uniformity of the pole piece are poor, the ultra-thin thickness cannot be met due to the fact that the lithium supplementing thickness precision is low are solved, meanwhile, the problem that an existing pole piece technology needs an auxiliary base material is solved, and the lithium supplementing cost is reduced.

The utility model discloses an active carbon purification and separation device for synthesizing nmn by a whole enzyme method, which belongs to the technical field of active carbon purification and separation and comprises a material barrel body and a filter device, the filter device is arranged on the material barrel body and comprises a round iron ring, a hanging buckle and a filter cloth bag, the round iron ring is hung on the material barrel body through the hanging buckle, and the filter cloth bag is arranged on the material barrel body. And a filter cloth bag is arranged on the circular iron ring. The utility model can solve the problem that after the existing solution is decolored by activated carbon, the color of the material is darker, the purity of the material is influenced, the subsequent process is also influenced, and the product is unqualified. According to the utility model, the problem that the color of materials and the purity of products are influenced due to the fact that activated carbon remains in a solution can be avoided, the activated carbon in the solution can be effectively controlled, and the problem that the color and the purity of the products are influenced due to the fact that the activated carbon leaks into the materials is effectively solved.

The invention discloses a fulvic acid extraction method by acid precipitation combined classification, which belongs to the field of fulvic acid production, and comprises the following steps: S1, obtaining a fulvic acid mixed solution by an acid precipitation method, S11, forming pre-coal slurry from water and weathered coal, and reacting with concentrated sulfuric acid at 70-90 DEG C for 1-2 hours; the ratio of acid to coal is 1: (3-5), and the ratio of water to coal is (1.5-2): 1; s13, centrifuging or settling the acid extract for 24 hours to remove insoluble sulfate and impurities; S14, taking supernate, and enabling the supernate to pass through a 100-120-mesh screen, so as to obtain a fulvic acid mixed solution; and S2, grading the fulvic acid mixed solution to obtain F1-F4 fulvic acid. The method solves the problem of difficulty in grading fulvic acid with different molecular weights, and is low in grading cost, convenient and fast.

The invention relates to the technical field of health care products, and provides a skin-tendering and anti-aging composition based on N-acetylneuraminic acid and a preparation method, and the composition comprises N-acetylneuraminic acid gel, milk powder, xylitol, prebiotics and other components. The N-acetylneuraminic acid gel is prepared by mixing a loaded N-acetylneuraminic acid whey protein isolate solution and a polysaccharide mixed solution in proportion, heating, stirring, gelatinizing, cooling and standing; n-acetylneuraminic acid is subjected to escherichia coli fermentation, centrifugation, ultrafiltration, ethanol precipitation, dialysis, freeze drying and other processes to prepare a high-purity product. The composition is prepared through the processes of sugar alcohol solution preparation, powder compounding, gel mixing, extrusion granulation, freeze drying and the like, the product homogeneity is good, the taste is excellent, the functions of tendering skin, resisting aging, enhancing immunity and promoting health are achieved, the problems that traditional N-acetylneuraminic acid is poor in stability and short in release rate are solved, and the composition is suitable for the fields of food and health care products.

The invention relates to a method for preparing 99.99% quartz sand by taking river yellow sand as a raw material, which comprises the following steps: firstly, carrying out sand making and pretreatment on the river yellow sand raw material to ensure that SiO2 in the treated quartz raw material is greater than or equal to 99%; carrying out first pickling on the obtained quartz raw material, wherein a pickling solution is a composite acid solution composed of HF and ferrate; mixing the obtained quartz raw material with charcoal powder, preserving heat and roasting for 30-45 minutes under the condition of 1000 + / -50 DEG C, and cooling after roasting is finished; the obtained quartz raw material is subjected to acid pickling for the second time, the acid pickling solution is a composite acid solution composed of hydrochloric acid and EDTA, after acid pickling is completed, water washing and drying are conducted, and the quartz sand with the SiO2 purity not lower than 99.99% is obtained. According to the method, the high-purity quartz sand with the purity of 99.99% can be extracted from the river yellow sand with the low quartz content, the process is simple, and a high-temperature chlorination process is not needed.

The utility model provides a gas-water separation device of a hydrogen fuel cell, which relates to the technical field of fuel cells and comprises a tank body, the separation assembly comprises an input pipe fixedly connected to the interior of the tank body, one end of the input pipe is fixedly connected with a flow dividing pipe, the bottom end of the flow dividing pipe is fixedly connected with a gas-liquid separation pipe, the top end of the outer side of the gas-liquid separation pipe is provided with a vent hole, and the bottom end of the gas-liquid separation pipe is fixedly connected with a bottom supporting disc; the interior of the separation assembly is fixedly connected with a water absorption assembly; by means of the design, efficient gas-water separation and automatic discharge of water are achieved, the purity and the circulation efficiency of hydrogen are improved, meanwhile, the situation that the active area of an electrode is reduced due to liquid water retention is avoided, and the problems that a traditional gas-liquid separation device carries liquid drops and the purity of hydrogen is reduced under the conditions of high humidity and high flow speed are effectively solved.

The method for purifying the circular RNA is provided on the basis of the SDVB reversed-phase column, and the method can be used for industrially producing and purifying the circular RNA on a large scale. The method suitable for separating the circular RNA is obtained by exploring gradient changes of different organic phases, so that the circular RNA in the IVT product can be effectively separated. The invention establishes a method for reversely purifying circular RNA (Ribonucleic Acid) based on an SDVB (Sodium Dodecyl Vinyl Benzene) chromatographic column. The circular RNA purified and prepared by the method has relatively high purity and high cyclization rate, keeps relatively high in-vitro catalytic activity, and is suitable for large-scale analysis and purification of circular RNA molecules.

This application relates to the field of carbon capture wastewater treatment technology, and in particular to a multi-stage purification method and system for absorbents in carbon capture wastewater. The method includes: performing wastewater pretreatment, multi-stage filtration, primary deweighting, distillation purification, and final deep purification steps; the system includes a pretreatment unit, a multi-stage filtration unit, a deweighting unit, a distillation unit, a deep purification unit, and a control unit. This application removes degradation products through the synergistic effect of chemical conditioning and physical filtration, achieves thorough separation of effective components through primary deweighting and distillation fractionation, and combines a vacuum environment to reduce operating temperature and slow down secondary degradation. This application can solve the problem that a single method cannot simultaneously achieve product purity and recovery rate, significantly improves the purity of the regenerated absorbent, realizes efficient resource regeneration of wastewater, reduces system energy consumption and operating costs, and has significant economic and environmental value.