176 results about "Lanthanum(III) chloride" patented technology

Scintillator materials based on certain types of halide-lanthanide matrix materials are described. In one embodiment, the matrix material contains a mixture of lanthanide halides, i.e., a solid solution of at least two of the halides, such as lanthanum chloride and lanthanum bromide. In another embodiment, the matrix material is based on lanthanum iodide alone, which must be substantially free of lanthanum oxyiodide. The scintillator materials, which can be in monocrystalline or polycrystalline form, also include an activator for the matrix material, e.g., cerium. To further improve the stopping power and the scintillating efficiency of these halide scintillators, the addition of bismuth is disclosed. Radiation detectors that use the scintillators are also described, as are related methods for detecting high-energy radiation.

The present invention discloses a preparation method and applications of a lanthanum-loaded biochar arsenic-removing adsorbent. The preparation method mainly comprises: washing corn stalks, remove impurities, carrying out air-drying, crushing, screening, carrying out stirring mixing on the corn stalk powder and a lanthanum chloride solution under a certain condition, adjusting the pH value to the alkaline state, removing excess chlorine ions from the solution, and carrying out anoxybiotic calcination on the mixture for a certain time at a certain temperature so as to prepare the nanometer lanthanum oxide-loaded biochar material. According to the present invention, the prepared lanthanum-loaded biochar can be used for treating pentavalent arsenic ions in wastewater, and has characteristics of simple preparation, low cost, high adsorption efficiency, good application prospect, and the like.

The invention disclose a method for preparing rare earth type hydrochlorination catalyst of acetylene comprising tin, which belongs to the field of preparing the hydrochlorination catalyst of acetylene. The catalyst comprises stannic chloride, rare earth chloride, other metal chlorides and carriers, wherein the rare earth chloride is adopted as cerium chloride or lanthanum chloride, and the carriers are cerium-zirconium powder or zirconia. The catalyst is prepared by soaking method, can be applied to fixed-bed reactors, has low cost, has no pollution, and has good catalytic activity and high selection in the process of producing vinyl chloride by hydrochlorination of acetylene.

The invention discloses nano-lanthanum hydroxide modified lignin porous carbon as well as a preparation method and application thereof. The preparation method comprises the following steps: preparingacetic acid lignin porous carbon: dissolving acetic acid lignin into a strong alkaline solution according to the ratio of 1 g to 5 mL, uniformly mixing and then drying to constant weight; carbonizinga dried solid mixture in an inert atmosphere, cooling to room temperature and then washing to neutral; carrying out vacuum drying to constant weight to obtain the acetic acid lignin porous carbon; preparing the nano-lanthanum hydroxide modified lignin porous carbon: adding the acetic acid lignin porous carbon into an ethanol aqueous solution of lanthanum chloride heptahydrate for uniformly mixing,adjusting a pH value of the solution, raising the temperature, fully reacting, sufficiently washing a reaction product and carrying out vacuum drying to constant weight to obtain the nano-lanthanum hydroxide modified lignin porous carbon. Highly-dispersed lanthanum hydroxide nanoparticles retain on the surface of the lanthanum hydroxide modified lignin porous carbon prepared by the preparation method disclosed by the invention; the absorption experiment shows that the modified acetic acid lignin porous carbon has a remarkable adsorbing effect on phosphorus, which is remarkably improved as compared with unmodified acetic acid lignin porous carbon.

The invention provides a preparation method of a lanthanum-doped metal organic framework material. The preparation method comprises the following steps: firstly, fully reacting zirconium tetrachloridewith terephthalic acid to generate a base framework material; preferably reacting lanthanum chloride heptahydrate with the terephthalic acid while avoiding the reaction of the lanthanum chloride heptahydrate and the base framework material. The invention provides the lanthanum-doped metal organic framework material and application thereof in adsorption of phosphate radical. The lanthanum-doped metal organic framework material has two adsorption sites of zirconium ions and lanthanum ions which can be used for well adsorbing the phosphate radical. The results of the embodiment show that the maximal adsorption capacity of the lanthanum-doped metal organic framework material to the phosphate radical is 348.43mg/g; in the presence of more heteroions, the recognition of the phosphate radical can be maintained; after repeated use for five times, the adsorption capacity of La-UIO-66 to the phosphate radical is also kept at 100 percent; the lanthanum-doped metal organic framework material hasexcellent stability and recycling performance.

The invention discloses a preparation method for an adsorbent capable of removing nitrogen and phosphorus simultaneously. The preparation method comprises the following steps of (1) fly ash pretreatment, (2) preparation of zeolite synthesized from fly ash, (3) rare earth element modifier preparation, and (4) adsorbent preparation. According to the preparation method, by using the zeolite synthesized from the fly ash, salts with alkaline-earth elements are added in the alkalization treatment process of the fly ash, and the performance of the zeolite synthesized from the fly ash is improved; two rare earth elements of lanthanum and gadolinium are added into a rare earth modifier prepared from ethylene glycol and polyvinylpyrrolidone so that the zeolite synthesized from the fly ash can be subjected to modification treatment; and compared with methods that modification is conducted by using lanthanum chloride independently in the prior art, the performance for adsorbing ammonium ions and phosphorus is greatly improved and reaches 93% or above, in addition, the adsorption rate is also greatly increased, and the quite good practical application value is achieved.

The invention relates to a preparation method of low-impurity-entrainment lanthanum carbonate or cerium lanthanum carbonate. The preparation method is characterized in that a lanthanum carbonate or cerium lanthanum carbonate solution is taken as a feed solution, an ammonium bicarbonate solution is taken as an ammonium bicarbonate, and new water or carbon precipitation supernatant is left at the bottom of a precipitation reaction kettle to serve as a base solution. The preparation method comprises the following steps: adding lanthanum carbonate or cerium lanthanum carbonate seed crystal in which seed crystal REO (Rare Earth Oxide) to feed solution REO is 1 percent by weight to 10 percent by weight; adding rare earth chloride and the ammonium bicarbonate solution into a reaction kettle at the same time at 20-50 DEG C to carry out a precipitation reaction, wherein the adding rate ratio is 1:1-3:1; at the end of the reaction, performing solid-liquid separation and water washing to obtain a carbonate lanthanum or cerium lanthanum carbonate product. The preparation method has the advantages that the process parameters of feeding way, relative feeding rate, precipitation pH value and final pH value of a ammonium bicarbonate precipitation lanthanum carbonate or cerium lanthanum carbonate solution are adjusted, so that manganese, copper and the like do not undergo the precipitation reaction, and the formed carbonate lanthanum or cerium lanthanum carbonate product has the characteristics of less soft agglomeration, small crystalline grain size and less entrainment of manganese and copper impurities.

The invention relates to the technical field of biochar, and especially relates to a lanthanum modified biochar, and a preparation method and application thereof. The preparation method provided by the invention comprises the following steps: pyrolyzing sheep manure to obtain sheep manure biochar; and washing the sheep manure biochar, dipping the washed sheep manure biochar in a lanthanum chloridesolution, and adjusting the pH value to 8-11 to obtain the lanthanum modified biochar. According to the record of the embodiment, the adsorption capacity of the lanthanum-modified biochar prepared bythe preparation method in the technical scheme on phosphate can reach 58.33 mg/g at most.

The invention discloses a resin-based nano-lanthanum material and a preparation method and application thereof, and belongs to the field of environmentally functional materials. The preparation methodincludes the following steps: 1) dissolving lanthanum chloride heptahydrate and concentrated hydrochloric acid in alcohol, performing mixing, adding a resin polymer, and performing stirring at room temperature; 2) filtering the resin after completion of stirring, and performing drying; 3) adding the resin to a precipitant solution, and performing stirring at room temperature so as to filter out the resin; and 4) washing the product by using water until neutrality, adding a NaCl solution, performing stirring, filtering out the resin, and performing drying so as to obtain the resin-based nano-lanthanum material. Lanthanum is mixed with hydrochloric acid so as to make lanthanum and chloride ions form complex anions, lanthanum in the form of complex anions in alcohol is uniformly adsorbed into anion exchange resin pore channels, then the nano-lanthanum compound is further generated in situ, and the prepared nano lanthanum particles have more uniform distribution, and have a high phosphorus adsorption rate.

Chestnut shell active carbon is prepared by the following raw materials by weight: 120-140 parts of chestnut shell, 3-5 parts of zinc chloride, 4-6 parts of Arabic gum, 4-6 parts of periston, 25-30 parts of bentonite, 10-15 parts of alumina, 20-25 parts of pumice, 2-4 parts of lanthanum chloride, 2-4 parts of cerium chloride, 2-4 parts of scandium chloride, 2-4 parts of yttrium chloride, 2-4 parts of praseodymium chloride, 1-3 parts of lanthanum nitrate, 1-3 parts of cerium nitrate, 1-2 parts of scandium nitrate, 1-2 parts of yttrium nitrate, 1-2 parts of praseodymium nitrate, 4-5 parts of modified diatomite, and a proper amount of water. Chestnut shell is used as a raw material, so as that the active carbon has advantages of developed aperture structure, big specific surface area, high adsorption speed, and good adsorption capability on various solutes and dissociation gases; lanthanum chloride is used for activation so as to form active carbon, which has big gaps and strong adsorption capability, is suitable for absorbing organic matters in air and water and removing harmful substances like formaldehyde, is low in cost, and is suitable for industrialization production.

The invention discloses a method for producing pentachloropyridine, and the method belongs to the field of agricultural chemical manufacture. The production method uses pyridine, nitrogen, chlorine, activated carbon-supported cobalt chloride, barium chloride and lanthanum chloride as raw materials, and produces pentachloropyridine by fluidized bed and fixed bed technologies. The reaction conditions are that the temperature of the fluidized bed and the fixed bed is in the range of 380 DEG C to 410 DEG C, the pressure is in the range of 0.10 to 0.12Mpa, the catalyst is the activated carbon-supported cobalt chloride, barium chloride and lanthanum chloride, the reaction transformation rate of the method reaches 98%, and the selectivity of the product pentachloropyridine is 91%. The production method has advantages of high utilization of raw materials, high product purity, simple process, and little environmental pollution, and is a relatively advanced synthetic method of pentachloropyridine at present.

The invention provides a cultivation method for high-quality agaricus blazei by using selenium and lanthanum as a dirt reducing agent. Raw materials and auxiliary materials commonly used for the cultivation of the existing agaricus blazei are adopted as cultivation materials. The method comprises the following steps: selecting fresh raw materials and drying the raw materials for standby; selecting a mushroom house or a cultivation room; uniformly mixing the raw materials and the auxiliary materials; sterilizing and packaging the raw materials and the auxiliary materials in bags; sterilizing and inoculating the materials; transferring the bags to a bed in the cultivation room for cultivation; and managing the bags as well as picking and harvesting the agaricus blazei before and after the fruiting. The method is characterized in that a selenium-lanthanum dirt reducing agent composition containing the selenium and the lanthanum (rare earth element) is added in every 100kg of dry cultivation materials as a dirt removing auxiliary agent, and the selenium-lanthanum dirt reducing agent composition consists of 4-10g of sodium selenite and 3-10g of lanthanum chloride. In the invention, the content of various heavy metals in agaricus blazei fruiting bodies can be reduced, wherein the content of cadmium is reduced to less than 5mg/kg; and the content of beneficial elements is also increased; therefore, the nutritional quality of the agaricus blazei can be obviously improved.

The invention discloses a preparation method for modified zeolite used for synchronously deeply processing nitrogen and phosphorus, and belongs to the field of the deep treatment of sewage. The methodcomprises the following steps: preparing zeolite, lanthanum chloride and sodium chloride solution; smashing the zeolite, carrying out suction filtration, and washing; putting the zeolite into the lanthanum chloride and sodium chloride solution under an alkaline condition to be dipped and oscillated; cleaning the zeolite, carrying out the suction filtration on the zeolite, and drying at the temperature of 105 DEG C; preparing the lanthanum chloride and sodium chloride solution; putting the zeolite into the lanthanum chloride and sodium chloride solution under the alkaline condition to be dipped and oscillated; cleaning the zeolite, carrying out the suction filtration on the zeolite, and drying at the temperature of 105 DEG C; preparing the lanthanum chloride and sodium chloride solution; putting the zeolite into the lanthanum chloride and sodium chloride solution under the alkaline condition to be dipped and oscillated; moving the zeolite out of the solution, and carrying out thermal treatment on the zeolite at the temperature of 250-300 DEG C; preparing hexadecylpyridinium bromide solution; dipping and oscillating the zeolite in CPB (Bromohexadecyl Pyridine) solution; removing thezeolite out of the solution, and carrying out thermal treatment on the zeolite at the temperature of 100-200 DEG C. According to the modified zeolite disclosed by the invention, efficiency for removing nitrogen and phosphorus in water can be obviously improved.

The invention discloses an electrochemical synthesis method of 1,1'-diindolylmethane derivatives. According to the method, indole derivatives, tetrahydrofuran and tetrahydrofuran derivatives are used as raw materials for synthetizing the 1,1'-diindolylmethane derivatives under the electrochemical condition. The method specifically comprises the following steps that the indole derivatives are taken and added into a mixed solvent of the tetrahydrofuran or tetrahydrofuran derivatives with acetonitrile, and a catalytic amount of lanthanum chloride and electrolyte lithium perchlorate are added; a platinum electrode is inserted into reaction liquid, stirring is conducted at the room temperature, and a reaction is carried out through electrification until the complete reaction is conducted; and the reaction liquid is extracted, concentrated and separated, and the 1,1'-diindolylmethane derivatives is obtained. Electricity is used for catalysis, expensive metal catalyzers and other oxidizing agents are not needed, stoichiometric lewis acid, protonic acid and heating are not needed either, reaction can be carried out mildly at the room temperature, the selectivity is good, the yield is high, and the whole process is simple and feasible; and the method is environmentally friendly and conforms to the idea of green chemistry.

The invention relates to the technical field of chemical engineering and particularly discloses a fluorescent substance based on an amino acid deep eutectic solvent and a preparation method of the fluorescent substance. The fluorescent substance based on the amino acid deep eutectic solvent comprises the following ingredients: the deep eutectic solvent and rare earth chloride at a mass ratio of (10-20):1, wherein rare earth chloride is at least one of europium chloride, lanthanum chloride, terbium chloride or gadolinium chloride; and the deep eutectic solvent comprises an alcohol compound andamino acid at a mole ratio of (5-10):1. The fluorescent substance based on the amino acid deep eutectic solvent can achieve a uniform luminescence effect, and is good in heat stability, green and environmentally friendly.

The invention relates to a method for preparing lanthanum metal by low-temperature electrodeposition by taking lanthanum chloride as a raw material and belongs to the field of low-temperature extraction of rare earth metals. The method for preparing the lanthanum metal by the low-temperature electrodeposition by taking the lanthanum chloride as the raw material comprises the following process steps: dissolving lithium nitrate in DMI at a room temperature to obtain a DMI electrolyte of the lithium nitrate, putting the DMI electrolyte of the lithium nitrate in an electrolytic bath, adding anhydrous lanthanum chloride, and stirring and mixing in the electrolytic bath to form a uniform transparent system, wherein the temperature of the whole system is controlled to be 25-75 DEG C, and the electrolytic voltage range is controlled to be from -2.0 to -2.5 V vs Ag; in the electrolytic process, adding the anhydrous lanthanum chloride in the electrolytic bath at set intervals and controlling themolar concentration of the lanthanum chloride to be +/-3 percent of the starting concentration. The method provided by the invention has the advantage that while the rare earth lanthanum metal is efficiently prepared, the energy consumption and the production cost are significantly reduced.