99 results about "Neodymium chloride" patented technology

This invention is attributed to the rare earth catalyst for diene polymerization and its preparation method. The catalyst is composed of neodymium chloride electron donor complex and organic methylaluminoxane with a molar ratio of 1:20~200. Monomers can be also added, with a neodymium chloride electron donor complex/monomer molar ratio of 1:5~40. The preparation method is simple and the obtained rare earth catalyst has high catalytic activity. With this catalyst, polybutadiene with a cis-1, 4-butadiene content of over 95%, polyisopentadiene and butadiene/isopentadiene copolymer can be obtained and the polymers uniquely have narrow molecular weight distributions, i.e., the ratio of weight-average molecular weight to number-average molecular weight is not larger than 2.0.

The invention relates to the technical field of high-molecular materials and particularly relates to an LED material for filtering yellow light and a preparation method thereof. The LED material for filtering yellow light is prepared from the following raw materials in parts by mass: 60-100 parts of a base material, 1-13 parts of a yellow light filtration aid, 0.1-1.0 part of a light diffusing agent, 0.1-0.8 part of an antioxidant, 0.2-0.4 part of a dispersant DP310 and 2-26 parts of deionized water, wherein the yellow light filtration aid is one or more than one of neodymium fluoride, neodymium oxide, neodymium chloride and neodymium nitrate. The LED material for filtering yellow light, prepared by the method disclosed by the invention, is excellent in optical performances such as yellow light filtration property, light transmittance and haze and can be used for effectively filtering and eliminating yellow light generated by an LED lamp so as to relieve the fatigue of eyes and preventing the eyes from damages of yellow light. The preparation method of the LED material is simple in process, convenient to operate and control, stable in quality, high in yield, high in production efficiency and low in production cost.

The invention belongs to the field of low-temperature electrochemical extraction and particularly relates to a method for preparing an aluminum-based rare earth alloy through near-room-temperature electrolysis. The method for preparing the aluminum-based rare earth alloy through near-room-temperature electrolysis is an electrolytic method, and a electrolyte adopted by the electrolytic method is formed by rare earth chloride and ionic liquid, wherein the ionic liquid accounts for 96-98% of the total mass of the electrolyte, the rare earth chloride accounts for 2-4% of the total mass, and the rare earth chloride is one of neodymium chloride, lanthanum chloride, cerium chloride, scandium chloride, yttrium chloride, praseodymium chloride, samarium chloride, europium chloride, gadolinium chloride and terbium chloride. According to the technological for preparing the aluminum-based rare earth alloy through near-room-temperature electrolysis, operation is easy, and cost is low; and the technological reserve and theoretical support are provided for green extraction of the low-cost aluminum-based rare earth alloy.

Composition including an oleophilic base ink composition having dispersed therein particles of an infrared-absorbing material wherein the infrared-absorbing material is selected from reduced indium tin oxide, titanium nitride, zirconium nitride, molybdenum metal, copper chromate, lanthanum hexaboride, neodymium oxide, neodymium chloride, dysprosium oxide and praseodymium oxide.

The invention discloses a visible light photosensitive resistor and a manufacturing method thereof. Rare-earth chloride is adopted to replace CyCl2, the rare-earth chloride with the weight percentage being 0.1% is added in photosensitive layer materials comprising CdS, CdSe and CdCl2 and is the mixture of one or two or more of holmium chloride, neodymium chloride, dysprosium chloride and samarium chloride, the matching ratio of the CdS to the CdSe to the CdCl2 is adjusted, and the content of the rare-earth chloride is quite small so that the material cost of the visible light photosensitive resistor cannot be affected; by combining the rare-earth chloride with the materials comprising the CdS, the CdSe and the CdCl2, the dark resistance of the visible light photosensitive resistor can be increased, and the bright resistance of the visible light photosensitive resistor can be reduced. The visible light photosensitive resistor has the advantages that the sensitivity of the visible light photosensitive resistor can be improved, the rare-earth chloride is high in stability, the visible light photosensitive resistor is not likely to be changed in the aging process, other performance parameters of the visible light photosensitive resistor are not reduced, the stability of the visible light photosensitive resistor is high in the aging process, and the rejection rate is greatly reduced.

The invention relates to a method for synthesis of a solution type neodymium phosphate complex. The method comprises the steps of: preparing neodymium chloride into a neodymium chloride aqueous solution; mixing acidic phosphoric ester with an organic solvent to obtain a phosphoric ester solution, adding an alkaline solution into the phosphoric ester solution to undergo a saponification reaction to obtain a saponified liquid; adding the neodymium chloride aqueous solution into the saponified liquid to undergo a reaction, then performing separation to obtain a first oil phase; adding a complex into the first oil phase, stirring them, and then performing separation to obtain a second oil phase, which is the solution type neodymium phosphate complex. The product of the method provided by the invention is solution type neodymium phosphate, and the product is miscible with alkane, arene and other solvents in arbitrary proportion. In a multicomponent catalyst aging process, more and freer aging modes can be selected. In addition, the method provided in the invention has an obviously simple production process and a low production cost, and the sodium chloride aqueous solution obtained in a layering process can be safely discharged after treatment and does not cause environmental pollution.

The invention belongs to the field of non-ferrous metal alloy low-temperature extraction and particularly relates to a method for co-depositing a magnesium-neodymium mother alloy near the room temperature. According to the method for co-depositing the magnesium-neodymium mother alloy near the room temperature, an electrolytic method is adopted. An electrolyte used according to the electrolytic method is composed of neodymium chloride, magnesium chloride, lithium chloride and ion-like liquid, wherein the ion-like liquid accounts for (95-97)% of the total mass of the electrolyte, the neodymium chloride and the magnesium chloride account for (2-4)% of the total mass of the electrolyte, the lithium chloride accounts for 1% of the total mass of the electrolyte, and the mole ratio of the neodymium chloride to the magnesium chloride is 1:1. The process for co-depositing the magnesium-neodymium mother alloy near the room temperature is easy to operate, low in cost and capable of being applied to development of functional materials and surface engineering. Technical reserve and theoretical support are provided for low-cost extraction of magnesium and neodymium.

The invention relates to preparation of high-purity anhydrous praseodymium chloride or neodymium chloride by a programmed heating method, and belongs to the field of preparation of rare-earth materials. PrCl3.6H2O or NdCl3.6H2O and ammonium chloride are mixed in a weight ratio of 2:1, and vacuumizing is performed by using a water jet pump; when the vacuum degree reaches 0.08Pa, a heating program is set for heating at the temperature of between room temperature and 350 DEG C, and the sectional heating speed and the heat preservation time are controlled; by analysis and detection, the water content of the obtained anhydrous praseodymium chloride or neodymium chloride is less than 0.1 percent; and the anhydrous praseodymium chloride or neodymium chloride is immediately dissolved when added into water, the aqueous solution obtained after the anhydrous praseodymium chloride or neodymium chloride is dissolved is clear and transparent, and the purity of the product is over 99.9 percent. The method has already been applied to a production line capable of producing 90 kilograms of anhydrous praseodymium chloride or neodymium chloride in each batch in an industrial-scale programmed heating furnace.

The invention discloses a method for preparing anhydrous neodymium chloride under an open system, which relates to a method for preparing anhydrous neodymium chloride and aims to solve the problems of vacuum environment requirement and complex preparation process of the traditional method for preparing the anhydrous neodymium chloride. The method for preparing the anhydrous neodymium chloride under the open system, disclosed by the invention, is finished through the following steps of: firstly, preparing neodymium chloride hexahydrate by using neodymium oxide; and secondly, preparing neodymium chloride by using the neodymium chloride hexahydrate: horizontally spreading NH4Cl on a reaction boat; then, horizontally spreading the neodymium chloride hexahydrate on the NH4Cl, then roasting, reacting and then grinding to obtain the anhydrous neodymium chloride. The method is applied to the field of chemical industry.

The invention discloses an aluminum alloy surface titanium plating treatment method, and relates to the technical field of aluminum alloy material surface treatment. The treatment process comprises: (a) deoiling; (b) dewaxing; (c) anodic oxidation; (d) acid etching; and (e) titanium plating; and titanium plating treatment liquid is prepared by the following raw materials in parts by weight: 20-35 of potassium chloride, 10-20 of titanium potassium oxalate, 2.5-5.5 of dimethyl carbonate, 5-10 of titanium sulfate, 1-3 of potassium carbonate, 3-7 of methyl butynol, 1-3 of nickel sulfate, 2-5 of butynediol, 1-2.5 of adenine corrosion inhibitor, 0.25-1 of neodymium chloride, and 2-8 of hydroxyethyl acrylate. The method capable of forming a layer of titanium film with high hardness and corrosion resistance on the surface of an aluminum alloy has such characteristics as high efficiency, simple operation and capability of improving the quality of aluminum alloy products, can be used for treating aluminum alloy profiles, also can be used for treating aluminum alloy parts, and in particular, is suitable for treating aluminum alloy shell parts and aluminum alloy panels.

The invention provides a technology for separating light rare earth from southern ion-absorbing type rare earth ore. The technology is implemented by adopting an aqueous light rare earth chloride solution obtained by grouping separation from the southern ion-absorbing type rare earth ore as a feed liquid and P507 as an extraction agent, and comprises three fractional extraction systems, and the three fractional extraction systems comprise a La/LaCe/PrNd/Nd four-outlet fractional extraction and separation system, a La/Ce two-feed-inlet fractional extraction and separation system and a Pr/Nd two-feed-inlet fractional extraction and separation system. By means of combination of the three fractional extraction systems, four separation products including 5N-grade lanthanum chloride, 3N-grade cerium chloride, 3N-grade praseodymium chloride and 4N-grade neodymium chloride are obtained directly. The technology has the advantages of high purity of a target separation product, high yield of rareearth element, low acid-base consumption, short technological process, low separation cost and the like.

The invention discloses a preparation method of an Nd-MOFs gas adsorption material. The preparation method comprises ligand AGE synthesis and material synthesis, and comprises the following specific steps: adding a ligand solution and a neodymium chloride solution into a conical bottle respectively, mixing uniformly, adding N,N-diisopropylethylamine (DIEA) dropwise under a magnetic stirring condition to regulate the pH of the solution to 7 to 8, and stirring for reacting at a room temperature; then performing suction filtration with a vacuum pump, washing the obtained solid with acetone for 2to 5 times, and washing with distilled water for 2 to 4 times; then placing the solid into a drying oven for drying until constant weight to obtain the Nd-MOFs gas adsorption material. The Nd-MOFs gasadsorption material prepared by the method solves the problems of change of multiple factors, degradation in the montmorillonite adsorption performance and the like due to easy desorption of activated carbon under a high temperature environment, incapability of applying a zeolite molecular sieve to adsorption under strong inorganic acid and strong alkali conditions, and the need of strictly controlling the pH value of the solution in the process of chemical modification on the surface of montmorillonite, and has an excellent adsorption effect.

The invention discloses a mercerized-wool and cotton blended fabric dyeing method using a pomegranate bark plant dye. The mercerized-wool and cotton blended fabric dyeing method includes the followingsteps that 1, 1-3% by weight of sodium bicarbonate and 0.5-5% by weight of wetting agent are added into deionized water and then are uniformly stirred and mixed, mercerized-wool and cotton blended fabric is placed into a mixed solution to be heated to 50-70 DEG C to be processed for 20-30 min, and the bath ratio is 1:(20-30); 2, the pomegranate bark plant dye, dye mordant and a wetting agent areadded into deionized water and then are uniformly mixed and stirred to prepare a dye solution, the mercerized-wool and cotton blended fabric is placed into the dye solution, heating starts at 30-35 DEG C, the heating rate is kept at 2-3 DEG C/min, and the temperature is kept at 50-60 DEG C to carry out processing for 60-80 min, wherein the dye solution is acidic, the bath ratio is 1:(20-30), and the dye mordant is neodymium chloride and/or aluminum potassium sulfate dodecahydrate. By the adoption of the mercerized-wool and cotton blended fabric dyeing method using the pomegranate bark plant dye, neodymium chloride and/or aluminum potassium sulfate dodecahydrate is adopted as the dye mordant, the weakly acidic dyeing solution has little damage on mercerized wool during dyeing, and the dyeing rate and the color fastness are high.

The invention relates to a method of making magnesium through electrolyzing magnesia directly, which belongs to the metal material field, characterized in that it uses the magnesia as raw material, uses the neodymium chloride and magnesium chloride as the fused salt electrolyte, wherein the mole percent of neodymium chloride and magnesium chloride is 20~30% and 70~80%. The mixed fused salt has lower fusible point and better conductivity in the range 650~800 Deg.c, in particular that the magnesium has lower dissolvability, and the weight percentage of magnesia dissolvability is 5~10%, the electrolyzing temperature is 720~760 Deg.c, the tank voltage is 4.5~6.5V, and the electric current efficiency can reach 85~90 Deg.c, the direct current consumption of magnesium per kilogram is 11~12.5kwh, the purity of magnesium is above 99.5%. The method is a new highly-effective metallurgical technology with no pollution.

The invention relates to yttrium aluminum garnet powder doped Nd 3<+> ions and its preparation method. The method of the present invention mainly comprises: burdening reagent containing yttrium: reagent containing aluminum: glucose: cetyl trimethyl ammonium bromide: neodymium chloride hexahydrate according to a mol ratio of 1.5: 5: 3: 0.006: (0.01 - 0.10); mixing and grinding glucose, reagent containing yttrium and reagent containing aluminum under condition of room temperature for 10 minutes, grinding the mixed material and neodymium chloride hexahydrate for 20 minutes, then adding cetyl trimethyl ammonium bromide in the grinded material to grind for 30 minutes; finally drying the grinded mixture at the temperature of 70 DEG C for 2 hours, obtaining a precursor; grinding the precursor for 30 minutes, insulating for 2 hours under the condition of 800 to 1200 DEG C of temperature, preparing the yttrium aluminum garnet powder doped Nd 3<+> ions. The invention has the characteristics of low reaction temperature, simple process, easy control, high yield, less pollution and high dopant amount of Nd 3<+>ions. The prepared powder has good crystallinity with 20 to 120 nm of powder granularity, which has no impure phase.

The invention provides a metal organic framework material containing dipyridyl carboxylic acid and a synthesizing method of the metal organic framework material, and belongs to the field of organic framework material electro-catalysis materials. The electro-catalysis material has the structural formula shown in the description, wherein L represents the element shown in the description, L1 represents coordinated water, and n represents multiple replication. The amount-of-substance mole ratio of 2,2-bipyridine-3,3-dicarboxylate to adipic acid to neodymium chloride is 2:(2-3):(1-3), 2,2-bipyridine-3,3-dicarboxylate, adipic acid and neodymium chloride are mixed and dissolved with water, stirring is carried out, the pH is regulated to be 4, the mixture is put into a sealed container for a constant temperature reaction at 145 DEG C for 96 h, the temperature is reduced to the room temperature at 1-2 DEG C/h, and purple transparent tabular crystals are obtained. The metal organic framework material containing dipyridyl carboxylic acid and the synthesizing method of the metal organic framework material are simple in synthesizing step, a complex has the ORR activity, and the metal organic framework material can serve as metal organic framework material electro-catalysis materials and has good application prospects.

The invention discloses a method for preparing high-purity lanthanum, high-purity cerium and high-purity praseodymium-neodymium. The method is characterized in that a light rare-earth chloride aqueoussolution is taken as feed liquid, and P507 is taken as an extracting agent; and the method consists of three fractional extraction systems, which are separately a La/LaCe/CePrNd/PrNd four-outlet fractional extraction system, a La/Ce full-load two-charge-hole fractional extraction separation system and a Ce/PrNd two-charge-hole fractional extraction separation system. Three fractional extraction separation systems are combined to directly obtain three separated products of 5N-grade lanthanum chloride, 5N-grade cerium chloride and 4N-grade praseodymium-neodymium chloride. The method has the advantages of being high in product purity, high in rare-earth element yield, low in acid and alkaline consumption, short in process flow, low in separating cost, and the like.

The invention discloses an environment-friendly photoresistor dielectric material and a preparation method thereof. In parts by weight, the dielectric material includes the following components: 20-40 parts of zinc sulfide, 10-50 parts of bismuth sulfide, and aluminum sulfide. 20-30 parts, 0.1-0.3 parts of lutetium chloride, 0.05-0.15 parts of neodymium chloride, 1-3 parts of copper sulfate solution, and 20-90 parts of ionized water. The application can improve the sensitivity of the photoresistor, and the raw materials used are safe and non-toxic, friendly to humans and the environment, and safe and environmentally friendly.

The invention relates to an analysis method for the neodymium content in neodymium chloride hydrate. The analysis method comprises: (1) carrying out thermogravimetric analysis on a neodymium chloride hydrate sample, wherein X g of a neodymium chloride hydrate sample is weighed, thermogravimetric analysis test is performed, a reaction is performed on the neodymium chloride hydrate to generate neodymium hypochlorite, and after the test is completed, the weight of the remaining material is Y g; and (2) calculating neodymium content in the neodymium chloride hydrate, wherein the neodymium content is Y*73.71%/X. According to the present invention, by using the instrument analysis method, the interference factor is less, and the error is small; and during the testing process, the reagent is not used, such that no waste liquid is produced, and the environmental pollution is low.

The invention relates to a method for preparing chemical pure neodymium fluoride. The method comprises the following steps of: (1) preparing neodymium chloride, namely, performing a reaction of neodymium oxide and chemical pure hydrochloric acid to obtain solution A; (2) removing impurities of barium and calcium to obtain filtrate B; and (3) adding hydrofluoric acid and oxalic acid into B with continuous stirring to obtain neodymium fluoride deposit and draining. In the preparation method, the neodymium oxide reacts with the hydrochloric acid to generate the neodymium chloride, barium salt and calcium salt are removed by adding the sulfuric acid into a reaction product, so that the neodymium chloride is prepared, and the neodymium chloride reacts with the hydrofluoric acid to synthesize the neodymium fluoride and ammonia gas is introduced to the neodymium fluoride so that optimal chloride ion removing effect is achieved. The preparation method has the advantages of processing steps, advanced synthesis technology, easily-controlled reaction process, good effect and high efficiency. The prepared neodymium fluoride has high purity and low impurity content and can be widely applied in the market.