35 results about "Ytterbium chloride" patented technology

The invention relates to a method for preparing fluorescent nano material converted on NaYF4, comprising the steps: yttrium nitrate, ytterbium nitrate and erbium nitrate or yttrium chloride, ytterbium chloride, erbium chloride and thulium chloride are dissolved in de-ionized water according to the mixture radio that the mol ratio of rare earth ions which are yttrium ion, ytterbium ion and erbium ion is equal to (70-95): (1-25): (0.5-10), so that the mixed solution is prepared; water soluble polymer having the ligand radical with the rare earth ions is added into the mixed solution for stirring reaction to form complex compound; the pH value of the mixed solution is adjusted to be 2-6; sodium fluoride, ammonium fluoride or hydrofluoric acid can be added into the mixed solution and stirred until colloid solution that is approximately transparent is obtained; then, the colloid solution is put into a high pressure closed reactor and heated at the temperature of 140-200 DEG C; after that the obtained product is cooled to be the room temperature, centrifugated, separated, washed and dried, finally, the fluorescent nano material converted on NaYF4 is obtained. The method can be used for preparing the converted material at lower temperature, the particle size and the appearance can be controlled, and the water-solubility is good.

The invention relates to a process for constant temperature extracting and completely separating high purity holmium, erbium, thulium, ytterbium and lutetium, which takes a holmium lutetium rare earth chloride solution as a raw material, the processes of constant temperature extracting ytterbium and lutetium and then separating ytterbium and lutetium are carried out to obtain a 99.99% thulium chloride solution, a 99.99% lutetium chloride solution, a 99.99% ytterbium chloride solution and a holmium yttrium erbium solution; the holmium yttrium erbium solution removes yttrium through naphthenic acid and is separated through holmium and erbium to obtain a 99.99% holmium chloride solution and a 99.99% erbium chloride solution. The process of the invention breaks the restriction that the production of holmium, erbium, thulium, ytterbium and lutetium uses extraction production under the normal temperature which can not reach the product purity requirements; and the problem that a traditional steam direct heating method can not effectively control the constant state of the extraction system temperature and the system temperature by using a box external heating method can not reach the temperature more than 23 DEG C; the process can solve the disadvantages of high energy consumption, low product purity, unstable quality, and high manufacture cost; and the process of the invention has the advantages of easy connection with other rare earth production lines and obvious economic benefit.

The invention discloses a preparation method of a rare earth-doped fluoride up-conversion luminescent nano dispersion, belongs to the cross fields of chemical engineering, materials and photonics, andrelates to a method for preparing the rare earth-doped fluoride up-conversion luminescent nano dispersion by utilizing a super-gravity reaction intensifying technology, i.e. a rotating packed bed reactor. Raw materials and reagents required for realizing the synthetic method of the rare earth-doped fluoride up-conversion luminescent nano dispersion comprise rare earth chlorate, sodium hydroxide,ammonium fluoride, a surfactant, deionized water and absolute ethanol, wherein the rare earth chlorate comprises yttrium chloride, ytterbium chloride and erbium chloride; the surfactant is respectively prepared from oleic acid, oleylamine and sodium citrate; a dispersion solvent is prepared from ethanol, tetrahydrofuran, cyclohexane, chloroform and toluene. According to the preparation method disclosed by the invention, the rotating packed bed reactor is introduced for premixing a reaction precursor solution, and molecular uniform mixing is realized, so that the rare earth-doped fluoride up-conversion luminescent nano dispersion which is small in particle size and narrow in particle size distribution is synthesized.

The invention discloses a method of preparing a dye-sensitized solar cell photo anode material capable of absorbing near infrared sunlight in multiple bands, which relates to the dye-sensitized solar cell photo anode material preparation method and aims at solving the technical problem of low infrared band sunlight utilization by the existing method of enhancing the dye-sensitized cell by an up-conversion material. The method comprises steps: yttrium chloride, ytterbium chloride, erbium chloride and ammonium fluoride are firstly used for preparing nanocrystalline which serves as crystal nucleus; the nanocrystalline is then diffused in a ytterbium chloride and ammonium fluoride raw material solution, and a first-layer core-shell structure nanocrystal is obtained; the first-layer core-shell structure nanocrystal is diffused in a yttrium chloride, holmium chloride and ammonium fluoride raw material solution for reaction, and a two-layer core-shell structure nanocrystal is obtained; and the two-layer core-shell structure nanocrystal is diffused in a raw material solution containing tetrabutyl titanate, and after a hydrothermal reaction, the photo anode material is obtained. The method of the invention can improve the photoelectric conversion efficiency of the solar cell.

The invention discloses neodymium and ytterbium co-doped quartz laser glass and a preparation method thereof. The glass comprises, in molar percentage, 89.5-94.75% of SiO2, 2.5-5% of Al2O3, 2.5-5% of P2O5, 0.2-0.4% of Nd2O3 and 0.05-0.1% of Yb2O3. The preparation method includes the steps: placing porous loose powder of silicon dioxide prepared by external vapor deposition process into solution of ytterbium chloride, neodymium chloride, aluminum chloride and phosphoric acid; uniformly co-doped neodymium, ytterbium, aluminum and phosphorus; drying and removing hydroxyl, and performing ball-milling to obtain powder with uniform particle sizes; performing high-temperature sintering vitrification to obtain the neodymium and ytterbium co-doped quartz laser glass. Experiments show that the neodymium and ytterbium co-doped quartz laser glass has low expansion coefficient and ultra-wide fluorescent emission in 1 micrometer wave band. The glass can be used for high-repetition frequency and heat shock resistance laser glass and is applicable to ultra-short and ultra-strong laser glass.

The invention discloses a technological process for preparing 5N ytterbium by using a solvent extraction method. 2N-3N-grade ytterbium chloride is used as a feed liquid, an acidic phosphonium reagent C272 is used as an extracting agent, and TBP is used as an extracted organic phase additive. The technological process comprises 12 steps including 3 separation steps and 5 auxiliary steps, wherein the 3 separation steps are respectively a YErTmYb / YbLu separation section, a YErTm / Yb separation section and a Yb / Lu separation section; and the 5 auxiliary steps are respectively a concentration section, an acid extraction section, a saponification section I, a reverse extraction section and a saponification section II. The YErTm / Yb separation section is connected in series with the Yb / Lu separation section. By using the technological process, 5N-grade high-purity ytterbium products with the relative purity of 99.9990%-99.9995% can be obtained, and the yield of the 5N-grade high-purity ytterbium products can reach up to 93.99%-98.17%. The technological process has the advantages of high ytterbium product purity, high ytterbium product yield, large production scale, low chemical reagent consumption, simplicity and convenience in operation, low production cost and the like.

The invention discloses water-based potassium silicate zinc-rich primer used for surface treatment of long-acting anti-microbial section steel structures. The water-based potassium silicate zinc-rich primer is prepared from, by weight, 100-102 parts of scale zinc powder, 15-17 parts of potassium silicate, 1-2 parts of water-based epoxy resin emulsion, 6-8 parts of styrene-acrylic emulsion, 3-5 parts of methyltrimethoxysilane, 1.2-1.4 parts of ytterbium chloride, 4-6 parts of viscose, 2.1-2.3 parts of single-wall carbon nanotubes, 10-11 parts of potash feldspar powder, 6-8 parts of polyvinyl alcohol, 5-7 parts of chitosan, 0.4-0.7 part of ferrocene and 21-23 parts of deionized water. The zinc-rich primer prepared by adding the styrene-acrylic emulsion in the raw materials after the styrene-acrylic emulsion is modified through the water-based epoxy resin emulsion, compositing the styrene-acrylic emulsion and a potassium silicate solution to be used as a binding agent, using the scale zinc powder modified by doped silence and rare earth together as pigment and combining other valid auxiliaries has the beneficial effects of being antimicrobial, resistant to corrosion, resistant to water, and the like and is suitable for steel long-acting corrosion-resistant coating projects, and the corrosion prevention service life can reach 50 years.

The invention specifically relates to a fluorescence detection method for risky material fluorine in tea leaves and belongs to the technical field of food safety detection. The fluorescence detectionmethod for risky material fluorine in tea leaves provided by the invention specifically comprises the following steps: taking a methyl alcohol mixed liquor of yttrium chloride, ytterbium chloride, holmium chloride, oleic acid, 1-octadecene, ammonium fluoride and sodium hydroxide as a raw material for preparing a hexagonal up-conversion nano-crystal; adding cyclohexane, IGEPAL CO-520, tetraethyl orthosilicate and APTES, thereby acquiring an aminated hexagonal up-conversion nano-crystal; mixing with a curcumin aqueous solution, thereby acquiring a specific mixed detection system; establishing afluorine ion detection standard curve; determining the fluorine content in the to-be-detected tea leaves. According to the invention, high sensitivity and specificity detection for fluorine in tea leaves is realized in the manner of preparing a fluorescence signal enhanced substrate through nanometer controllable self-assembling and establishing a stable specific fluorine ion detection system, sothat the fluorescence detection method has wider linear detection scope and lower detection limit and is expected to be applied to large-scale detection for risky material fluorine in tea leaves.

The invention discloses an extraction separation method for co-production of 4N holmium and 5N ytterbium. The extraction separation method comprises the steps of adopting P229 as an extraction agent,adopting a 2N-grade holmium chloride solution as first feed liquid, and adopting 2N-grade ytterbium chloride as second feed liquid; carrying out fractional extraction for separating TbDyHo / HoYErTm, carrying out fractional extraction for separating YErTmYb / YbLu, carrying out full-load fractional extraction for separating TbDy / Ho, carrying out full-load fractional extraction for separating Ho / YErTm,carrying out full-load fractional extraction for separating YErTm / Yb, and carrying out fractional extraction for separating Yb / Lu. According to the extraction separation method for co-production of the 4N holmium and the 5N ytterbium provided by the invention, the acid and alkali consumption for preparing 4N-grade holmium chloride and 5N-grade ytterbium chloride can be reduced, and the product qualification rate of the 4N-grade holmium chloride can be improved.

The invention provides an ytterbium oxychloride nanosheet and a preparation method and application thereof. The preparation method includes: adopting ytterbium oxide and ytterbium chloride hexahydrateas raw materials, adding sodium chloride, and subjecting the materials to chemical vapor deposition reaction to obtain the ytterbium oxychloride nanosheet. The preparation method is simple in technology, high in reaction speed and low in cost, the prepared ytterbium oxychloride (YbOCl) nanosheet is large in area, high in purity, high in crystallinity and stable in chemical property and can be applied to electrode material or insertion material or the like of batteries.

A preparation method of an ytterbium aluminum phosphorus fluorine doped quartz optical-fiber preform core rod is achieved based on an improved chemical vapor deposition (MCVD) process and by combining with a solution soaking process. First of all, a loose fluorine-containing silicon dioxide nano-particle layer having a certain thickness deposits in a quartz tube based on a chemical deposition process and then is put in an ytterbium chloride and aluminum chloride solution with a certain concentration to achieve even ytterbium and aluminum co-doping, drying and dehydroxylation are performed, then a raw material phosphorus oxychloride is put into the doping quartz tube by utilizing high-purity oxygen, and the ytterbium aluminum phosphorus fluorine doped quartz optical-fiber preform core rod is obtained through high-temperature vitrification and diffusion process. The method can achieve preparation of the large-diameter ytterbium-doped core rod with the refractive index higher than pure quartz, with errors adjustable in the range of 0.0004-0.0008 and having good axial refractive index consistency and with the radial refractive index distributed zigzag.

The invention relates to an extraction and separation method for co-producing 4N dysprosium and 4N ytterbium. C272 is taken as an extracting agent, 2N-grade dysprosium chloride solution is taken as afirst material solution, and an enriched thulium-ytterbium-lutetium chloride solution is taken as a second material solution; the method comprises the following six steps that GdTbDy / Dy HoYErTm are separated through fractional extraction; HoYErTmYb / YbLu are separated through the fractional extraction; GdTb / Dy are separated through full-load fractional extraction, Dy / HoYErTm are separated through the full-load fractional extraction, HoYErTm / Tb are separated through the full-load fractional extraction, and Yb / Lu are separated through the full-load fractional extraction. According to the method,the 4N-grade dysprosium chloride water solution, an aqueous solution of the 4N-grade ytterbium chloride and a 2N-grade lutetium chloride product are obtained at the same time through one extraction and separation technological process; and the method has the characteristics that the acid-base consumption is low, the process stability is good, the product percent of pass is high, environmental friendliness degree is high, the separation process is short, production cost is low.

The invention relates to a method for extracting and separating a thulium, ytterbium and lutetium enrichment matter from a solvent. The method for extracting and separating thulium, ytterbium and lutetium enrichment matter from the solvent comprises the steps that a thulium, ytterbium and lutetium chloride enrichment matter aqueous solution is used as a raw material, C272 is used as an extractingagent, and isooctyl alcohol is an organic phase modifying agent, the thulium, ytterbium and lutetium enrichment matter is composed of three fractionation extraction systems, that is, Tm / TmYb / YbLu / Luthree-in four-out fractionation extraction separation system, a Tm / Yb full load fractionation extraction separation system and a Yb / Lu fractionation extraction separation system. Through the combination of the three fractionation extraction systems, three separation products of 4N grade thulium chloride, 5N grade ytterbium chloride and 4N grade lutetium chloride are directly obtained. The method for extracting and separating thulium, ytterbium and lutetium enrichment matter from the solvent has the advantages of high purity of a target separation product, high yield of rare earth element thulium, ytterbium and lutetium, less acid-base consumption, short process flow and low separation cost.

The invention discloses dual anti-counterfeiting fluorescent ink as well as a preparation method and an application thereof. The method comprises the following steps: reacting citric acid hexahydrate,ethylenediamine, ytterbium chloride hexahydrate, erbium chloride hexahydrate and water to obtain doped carbon quantum dots; mixing rare earth doped carbon dots, dialdehyde nano fibril cellulose, 2-methylpyridine-N-borane and a sodium acetate-glacial acetic acid buffer solution for reaction to obtain a Yb / Er-carbon dot-nano cellulose composite material; and mixing the Yb / Er-carbon dot-nanocellulose composite material, polyvinyl alcohol, methylene blue, sodium stearate, urea and water to obtain the dual anti-counterfeiting fluorescent ink. The method is green, environmentally friendly, low in toxicity and simple and convenient in synthesis method, blue fluorescence and green fluorescence can be emitted, compared with traditional fluorescent ink, the added nano-fibril cellulose greatly improves the rheological property and thixotropic property of the water-based ink, has certain competitive advantages compared with products of the same type, and can be used for important information security anti-counterfeiting application.

The invention discloses a rare earth based composite electromagnetic wave absorption material and a preparation method thereof. The rare earth based composite electromagnetic wave absorption material prepared from materials including methyl phenyl vinyl silicone rubber, chlorinated polyethylene, tourmaline powder, volcanic ash, nano-gadolinium oxide, praseodymium neodymium oxide, ytterbium chloride, triethyl citrate, 5-hydroxymethylfurfural, gamma-aminopropyltriethoxysilane, 3-8 parts of positive pyrophosphoric acid, nanoporous silica, nano-sized needle-shape zinc oxide, white carbon black, N,N'-methylene bisacrylamide, polyacrylonitrile-based carbon fiber, a styrene-maleic anhydride copolymer, an ethylene-propylene polymer, dioctyl phthalate, chlorinated fatty acid methyl ester, polyethylene wax base epoxy and acetone. The rare earth based composite electromagnetic wave absorption material is high in wave absorption, wave absorption performance is also displayed in low frequency, good bandwidth characteristics and wave absorption performance are achieved, and the material is broad in market prospect.

The invention discloses a preparation method of an anti-static PP (polypropylene) master batch. The preparation method comprises following operation steps: (1), samarium chloride and ytterbium chloride are added to water and are mixed and stirred uniformly, then dodecyl salicylic acid is added, after uniform mixing and stirring and a thermal insulation reaction, an upper water layer is removed, and dodecyl salicylic acid rare earth is obtained; (2), after dodecyl salicylic acid rare earth and sodium dodecyl benzene sulfonate are mixed uniformly, an anti-static agent is prepared; (3), after PPresin, the anti-static agent, an antioxidant and talcum powder are mixed uniformly, the mixture is added to a twin-screw extruder and subjected to extrusion and pelletization, and the anti-static PP master batch is prepared. The preparation method of the anti-static PP master batch is low in cost and simple to operate, and a prepared finished product is excellent in washing durability and moistureresistance.

The invention belongs to the technical field of food safety detection, and relates to a method for detecting mercury content in tea based on up-conversion and a Rhodamine derivative specific system. The specific method comprises the steps of: taking yttrium chloride hexahydrate, ytterbium chloride hexahydrate, holmium chloride hexahydrate, gadolinium chloride hexahydrate, oleic acid, 1-octadeceneand a methanol mixed liquid of ammonium fluoride and sodium hydroxide as raw materials to prepare an up-conversion nanomaterial; adding ethyl alcohol, aqueous ammonia, tetraethyl orthosilicate and 3-Aminopropyltriethoxysilane into the up-conversion nanomaterial to obtain an amino-functionalized up-conversion nanomaterial; mixing the amino-functionalized up-conversion nanomaterial with a Rhodaminederivative solution to obtain a specific detection system; and adding a mercury ion solution into the specific detection system to determine a fluorescence intensity signal eigenvalue of the detectionsolution, establishing a mercury ion detection standard curve by taking the fluorescence intensity signal eigenvalue as a longitudinal coordinate and mercury ion concentration as a horizontal ordinate, and realizing the determination of mercury content in tea to be detected. Through constructing the steady-state specific mercury ion fluorescence detection system, the method realizes the highly sensitive and specific detection of mercury in the tea, has a wide linear detection range and a low detection limit, and has good application prospect.

The invention relates to a preparation method of an upatinib chiral intermediate as shown in a formula 6. The method comprises the following steps: by taking 6-oxa-3-azabicyclo [3.1. 0] hexane-3-carboxylic acid benzyl ester as a raw material, carrying out asymmetric ring-opening reaction under the catalytic action of a pyridine bisoxazoline ytterbium chloride complex to obtain the upatinib chiral intermediate. Removing trimethylsilyl at the C-4 position, forming methanesulfonate with hydroxyl at the C-4 position, carrying out a series of reactions of configuration inversion at the 4 position, and finally hydrolyzing under an alkaline condition to obtain the Upatinib chiral intermediate compound 6. The method has the advantages of cheap and easily available raw materials, simple process operation, high product chiral purity, high atom utilization rate, easy industrialization, and high economic and industrial application values.

The invention relates to a method of preparing high purity thulium, high purity ytterbium and high purity lutecium. By taking a rare earth chloride aqueous solution of thulium, ytterbium and luteciumconcentrate as a feed liquid, C272 as an extractant and isooctanol as an organic phase modifier, a system is formed by a Tm / TmYb / YbLu / Lu four outlet fractional extraction separation system, a Tm / Yb full load two feed inlet fractional extraction separation system and a Yb / Lu two feed inlet fractional extraction separation system. By combining the three fractional extraction separation systems, three separated products of 5N grade thulium chloride, 5N grade ytterbium chloride and 5N grade lutecium chloride are obtained directly. The method has the advantages of being high in product purity, highin yield of rare earth elements, small in acid and alkali consumption, short in process flow, low in separation cost and the like.

The invention discloses a method of preparing a dye-sensitized solar cell photo anode material capable of absorbing near infrared sunlight in multiple bands, which relates to the dye-sensitized solar cell photo anode material preparation method and aims at solving the technical problem of low infrared band sunlight utilization by the existing method of enhancing the dye-sensitized cell by an up-conversion material. The method comprises steps: yttrium chloride, ytterbium chloride, erbium chloride and ammonium fluoride are firstly used for preparing nanocrystalline which serves as crystal nucleus; the nanocrystalline is then diffused in a ytterbium chloride and ammonium fluoride raw material solution, and a first-layer core-shell structure nanocrystal is obtained; the first-layer core-shell structure nanocrystal is diffused in a yttrium chloride, holmium chloride and ammonium fluoride raw material solution for reaction, and a two-layer core-shell structure nanocrystal is obtained; and the two-layer core-shell structure nanocrystal is diffused in a raw material solution containing tetrabutyl titanate, and after a hydrothermal reaction, the photo anode material is obtained. The method of the invention can improve the photoelectric conversion efficiency of the solar cell.

The present invention relates to a process for pulse electroplating of a zinc-nickel alloy through a ytterbium-containing electrolyte, wherein the electroplating electrolyte is a zinc-nickel alloy electrolyte, and contains 1-2 g / L of ytterbium chloride or 1.5-3 g / L of ytterbium nitrate as an additive, and the power supply manner of the electroplating is output pulse power supply. With the electroplating process, the zinc-nickel alloy nanometer multilayer film improved by plating ytterbium on the plated part surface has characteristics of high hardness, high corrosion resistance, high wear resistance, high high-temperature oxidation resistance, high compactness and high comprehensive performance. In addition, the electroplating process and the electrolyte have advantages of no requirement of post-plating treatment process, cost saving, efficiency, rapidness and convenient operation.

A chemical preparation method for ultrafine ytterbium oxide having D50 of 1.5-2 [mu]m is disclosed, belonging to the technical field of ytterbium oxide preparation. The method includes a step of firstly preparing an oxalic acid solution, namely a step of weighing purified oxalic acid, adding the oxalic acid into pure water to prepare an oxalic acid solution having a concentration of 0.1-0.5 mol / L,and fully stirring the solution; a step of preparing a ytterbium chloride solution having a concentration of 0.1-0.5 mol / L, adding sodium dodecylbenzenesulfonate, and stirring the mixture until uniform dispersion; a step of rapidly adding dropwise the ytterbium chloride solution containing the sodium dodecylbenzenesulfonate into the oxalic acid solution under stirring, adding acetic acid after the addition of the ytterbium chloride solution is finished, and fully stirring the mixture for 1 h; and a step of performing suction filtration and water washing with water washing temperature being higher than 95 DEG C, then draining to obtain a precipitate, and firing the precipitate at 850-900 DEG C for 3-5 h to obtain the ultrafine ytterbium oxide.

The invention belongs to the technical field of food safety detection, and relates to a method for detecting mercury content in tea based on up-conversion and a Rhodamine derivative specific system. The specific method comprises the steps of: taking yttrium chloride hexahydrate, ytterbium chloride hexahydrate, holmium chloride hexahydrate, gadolinium chloride hexahydrate, oleic acid, 1-octadeceneand a methanol mixed liquid of ammonium fluoride and sodium hydroxide as raw materials to prepare an up-conversion nanomaterial; adding ethyl alcohol, aqueous ammonia, tetraethyl orthosilicate and 3-Aminopropyltriethoxysilane into the up-conversion nanomaterial to obtain an amino-functionalized up-conversion nanomaterial; mixing the amino-functionalized up-conversion nanomaterial with a Rhodaminederivative solution to obtain a specific detection system; and adding a mercury ion solution into the specific detection system to determine a fluorescence intensity signal eigenvalue of the detectionsolution, establishing a mercury ion detection standard curve by taking the fluorescence intensity signal eigenvalue as a longitudinal coordinate and mercury ion concentration as a horizontal ordinate, and realizing the determination of mercury content in tea to be detected. Through constructing the steady-state specific mercury ion fluorescence detection system, the method realizes the highly sensitive and specific detection of mercury in the tea, has a wide linear detection range and a low detection limit, and has good application prospect.

The invention belongs to the technical field of food safety detection, and constructs a method for detecting cadmium content in tea based on up-conversion and a dithizone-specific system. The method comprises the following specific steps of taking yttrium chloride hexahydrate, ytterbium chloride hexahydrate, holmium chloride hexahydrate, gadolinium chloride hexahydrate, oleic acid, 1-octadecene, ammonium fluoride and methanol mixture of sodium hydroxide as raw materials to prepare up-conversion nanomaterials; adding ethanol, ammonium hydroxide, tetraethyl orthosilicate and 3-aminopropyltriethoxysilane to obtain amino functionalized up-conversion nanomaterials, mixing the amino functionalized up-conversion nanomaterials with a dithizone solution to obtain a specificity detection system, determining the characteristic value of a fluorescence intensity signal of the detection solution after adding the cadmium ion solution as the ordinate, and establishing a cadmium content detection standard curve by using the cadmium ion concentration as the abscissa to determine the cadmium content in the tea to be tested. The method provided by the invention realizes the high sensitivity and specificity detection of cadmium in the tea by constructing a steady-state specific cadmium ion fluorescence detection system, and has a wide linear detection range, low detection limit and good application prospect.

The invention discloses a preparation method and application of an up-conversion nanorod. The preparation method comprises the following specific steps: 1) synthesizing the up-conversion nanorod by utilizing a hydrothermal method; 2) respectively preparing water solutions of ytterbium chloride, yttrium chloride and thulium chloride; 3) weighing 8 mL of a sodium hydroxide solution, adding the sodium hydroxide solution into a 250-mL round-bottom flask, adding 25 mL of absolute ethyl alcohol and isometric oleic acid while stirring, and conducting stirring for 10 min to clarify the mixed solutionfrom turbidity; 4) dropwise adding a chlorate solution containing 20 mmol of rare earth elements, and conducting stirring; (5) measuring 5 mL of an ammonium fluoride solution, dropwise and slowly adding the ammonium fluoride solution into the round-bottom flask, and continuing to conduct stirring for 30 minutes until the solution becomes uniform liquid; and (6) transferring the prepared mixed solution into two 50-mL hydrothermal kettles, putting the hydrothermal kettles into a 180 DEG C drying oven for a reaction, conducting cooling to room temperature, carrying out centrifugal treatment, sequentially conducting repeated washing with ethanol and pure water multiple times, and removing a solvent to obtain a pure up-conversion crystal material.

The present invention is a method for solvent extraction and separation of thulium-ytterbium-lutetium enrichment. The aqueous solution of thulium-ytterbium-lutetium chloride is used as feed liquid, C272 is used as extraction agent, and isooctanol is used as organic phase modifier. The extraction system is composed of Tm / TmYb / YbLu / Lu three-in and four-out fractionation extraction and separation system, Tm / Yb full-load fractionation extraction and separation system and Yb / Lu fractional extraction and separation system. Through the combination of three fractional distillation extractions, three separated products of 4N-grade thulium chloride, 5N-grade ytterbium chloride and 4N-grade lutetium chloride are directly obtained. The invention has the advantages of high purity of the target separation product, high yield of rare earth elements thulium ytterbium lutetium, less acid-base consumption, short technological process, low separation cost and the like.

The invention relates to a method for preparing Yb and Tm doped sodium yttrium tetrafluorohydrazine and belongs to the technical field of fluorescent nano material preparation. A hydrothermal method is adopted for preparation. The method is basically characterized by comprising the following steps: taking deionized water and N-methyl pyrrolidone as solvents, and ytterbium chloride hexahydrate, thulium chloride hexahydrate and yttrium chloride hexahydrate as raw materials, mixing and stirring, adding sodium fluoride, putting the mixed liquid into a reaction kettle, carrying out thermal treatment for 12 hours at 140-180 DEG C, naturally cooling to the room temperature, centrifuging, collecting a sample, and washing with deionized water and absolute ethyl alcohol three times to obtain a hexagonal and cubic mixed phase or pure hexagonal phase-phase sodium yttrium tetrafluorohydrazine upconversion fluorescence material. Under excitation of laser of 980nm, the material has a very good fluorescence property, and has a main emission peak at 362nm, 451nm and 475nm. The method is simple to operate and good in energy conservation, greenness and environment protection, and the prepared productis high in fluorescence strength, wide in application range and easy to popularize and produce.

The present invention provides a nanosheet of ytterbium oxychloride and its preparation method and application. The preparation method comprises: taking ytterbium oxide and ytterbium chloride hexahydrate as raw materials, adding sodium chloride, and performing a chemical vapor deposition reaction to obtain the chlorine Ytterbium oxide nanosheets. The preparation method of the invention has simple process, fast reaction speed and low cost, and the prepared ytterbium oxychloride (YbOCl) nano sheet has large area, high purity, good crystallinity and stable chemical properties. The ytterbium oxychloride (YbOCl) nanosheets prepared by the present invention can be applied in aspects such as battery electrode materials or intercalation materials.

The present invention is a method for preparing high-purity thulium, high-purity ytterbium and high-purity lutetium. The rare earth chloride aqueous solution of thulium-ytterbium-lutetium enrichment is used as feed liquid, C272 is used as extraction agent, and isooctanol is used as organic phase modifier; It is composed of Tm / TmYb / YbLu / Lu four-outlet fractionation extraction and separation system, Tm / Yb full-load two-feeder fractional distillation and extraction system, and Yb / Lu two-feeder fractional distillation and extraction system; through the combination of three fractional distillation extraction and separation systems , directly obtain 5N grade thulium chloride, 5N grade ytterbium chloride and 5N grade lutetium chloride three separated products. The invention has the advantages of high product purity, high rare earth element yield, less acid-base consumption, short process flow, low separation cost and the like.