54 results about "Lanthanum sulfate" patented technology

The invention provides a preparation method of a bar-shaped lanthanum hydroxide nanocrystal. The method comprises the following steps of: adding nona-lanthanum sulfate and ethylenediamine tetraacetic acid into deionized water respectively to obtain a solution B; adjusting the pH of the solution B to 8.0-12.0 with an ammonia water solution to obtain a precursor solution C; pouring the precursor solution C into a four-neck round-bottom flask, putting the four-neck round-bottom flask into a microwave-ultraviolet ray-ultrasonic wave three-in-one synthesis reaction instrument, selecting a microwave heating-ultraviolet irradiation combined reaction in a temperature-time mode, and naturally cooling to the room temperature after the reaction; and centrifugally collecting a product, washing repeatedly with deionized water and absolute ethyl alcohol respectively, and drying to obtain a final product, i.e., bar-shaped lanthanum hydroxide nanocrystal. A simple microwave-ultraviolet ray synthesis method preparation process is adopted, so that the method has the advantages of short reaction time period, low energy consumption, low cost, convenience in operating, one-time completion of a reaction in a liquid phase, and no need of subsequent treatment. La(OH3) particles prepared with the method have bar-shaped structures, are small in size, have high dispersity, and can be applied in the catalysis field and the optics field.

The invention discloses anti-corrosive cutting fluid. The anti-corrosive cutting fluid comprises the following materials in parts by weight: 0.1-0.2 part of phosphotungstic acid, 0.7-1 part of tetramethylammonium nitrate, 1-2 parts of naphthenic soap, 2-3 parts of toluene diisocynate, 1-2 parts of sodium benzoate, 0.6-1 part of methyl isobutyl ketone, 0.1-0.2 part of zinc cyanurate, 3-5 parts of barium petroleum sulfonate, 0.6-1 part of 8-hydroxyquinoline, 0.8-2 parts of calcium lactate, 0.7-2 parts of isopropyl palmitate, 0.5-1 part of phytosterol, 0.8-1 part of methyl tin mercaptide, 70-80 parts of deionized water, 2-3 parts of polyaniline and 6-7 parts of rare-soil function additives. The anti-corrosive cutting fluid disclosed by the invention has the advantages that in the added rare-soil function additives, alkenyl succinate, wool fat and polyethylene glycol 4000 are blended and modified, so that the stable anti-rusting effect can be achieved; due to the added nano silicon dioxide, certain lubricity can be achieved, the cutting force, the friction and the power consumption can be reduced; lanthanum sulfate not only has certain anti-corrosive property, but also can improve the anti-corrosive and slow-release effects; and the additives have good oleophilic and hydrophilic properties and high emulsifying and dispersing performances, and the anti-corrosive property, the lubricity, the anti-rusting property and the stability of finished cutting fluid can be effectively improved.

The invention discloses cutting fluid for a machine tool. The cutting fluid comprises the following materials in parts by weight: 0.5-1 part of alkylated diphenylamine, 2-3 parts of tetrabutyl titanate, 0.6-1 parts of potassium fluotitanate, 3-5 parts of allyl polyethylene glycol, 0.8-1 part of barium stearate, 1-2 parts of methyl pentachlorostearate, 0.3-1 part of 2-bromo-4-methylphenol, 1-2 parts of dioctyl azelate, 1-3 parts of sodium hydrogen sulfite, 0.4-1 part of molybdenum disulfide, 2-3 parts of potassium citrate, 70-80 parts of deionized water, 6-7 parts of rare-soil functional additive and 6-8 parts of boric acid. The cutting fluid disclosed by the invention has the advantages that in the added rare-soil function additives, alkenyl succinate, wool fat and polyethylene glycol 4000 are blended and modified, so that the stable anti-rusting effect can be achieved; due to the added nano silicon dioxide, certain lubricity can be achieved, and the cutting force, the friction and the power consumption can be reduced; lanthanum sulfate not only has certain anti-corrosive property, but also can improve the anti-corrosive and slow-release effects; and the additives have good oleophilic and hydrophilic properties and high emulsifying and dispersing performances, and the anti-corrosive property, the lubricity, the anti-rusting property and the stability of finished cutting fluid can be effectively improved.

Disclosed a nanometer monox colloid electrolytic solution of lead-acid storage battery and its preparing method, relates to the manufacturing technique of lead-acid storage battery colloid electrolytic solution special for the electric bicycle. The invention prepares the nanometer monox colloid electrolytic solution by using the lead-acid analytical pure vitriol, vapor phase silica dioxide nanometer powder, salt cake, and the deionized water as main material, which are mixed to be added polyacrylamide and poly-sodium acrylate as gel modifying agent; then, adding litter lanthanum sulfate, cerous sulfate, tungsten oxide, and molybdenum oxide. The invention avoids the disadvantage effect of using sodium silicate colloid; uses vapor phase silica dioxide nanometer powder as gel agent; adds little chemical components, to form the new colloid electrolytic solution which can improve the agglutination property, increase the capacity of accumulator, and prolong the service life of deep discharging cycle. In addition, the invention can be used as electrolytic solution to replace present vitriol water electrolytic solution, to improve the rheological property of colloid electrolytic solution, and control the electrolytic process of water.

The invention provides a preparation method of a bar-shaped lanthanum hydroxide nanocrystal. The method comprises the following steps of: adding nona-lanthanum sulfate and ethylenediamine tetraacetic acid into deionized water respectively to obtain a solution B; adjusting the pH of the solution B to 8.0-12.0 with an ammonia water solution to obtain a precursor solution C; pouring the precursor solution C into a four-neck round-bottom flask, putting the four-neck round-bottom flask into a microwave-ultraviolet ray-ultrasonic wave three-in-one synthesis reaction instrument, selecting a microwave heating-ultraviolet irradiation combined reaction in a temperature-time mode, and naturally cooling to the room temperature after the reaction; and centrifugally collecting a product, washing repeatedly with deionized water and absolute ethyl alcohol respectively, and drying to obtain a final product, i.e., bar-shaped lanthanum hydroxide nanocrystal. A simple microwave-ultraviolet ray synthesis method preparation process is adopted, so that the method has the advantages of short reaction time period, low energy consumption, low cost, convenience in operating, one-time completion of a reaction in a liquid phase, and no need of subsequent treatment. La(OH3) particles prepared with the method have bar-shaped structures, are small in size, have high dispersity, and can be applied in the catalysis field and the optics field.

The invention relates to the technical field of material preparation, in particular to a method for preparing lanthanum cerium oxalate from rare earth polishing powder waste residue. The method comprises the following steps: reacting to leach the recovered rare earth polishing powder waste residue in concentrated sulfuric acid to obtain a lanthanum cerium sulfate solution; separating the lanthanum cerium sulfate solution from solid residue, and adding oxalic acid to obtain a lanthanum cerium oxalate precipitate; and filtering and separating the lanthanum cerium oxalate precipitate, washing to neutrality, and drying to obtain the finished lanthanum cerium oxalate product. Fluorides such as hydrogen fluoride are not required, the polishing powder waste residue is scientifically and reasonably utilized comprehensively, and the whole recovery process is environment-friendly. The method has the characteristics of small investment, low recovery cost, simple process flow, high recovery rate, environment friendliness and the like.

The invention relates to a method for preparing solid super acid and a method for catalyzing and synthetizing chloracetate by using the solid super acid. The method comprises the following steps of: adding tetrabutyl titanate, ethanol, acetic acid and water according to the proportion, reacting at the room temperature, continuously stirring for one hour, standing for two days after the end of the reaction, heating to obtain pale yellow dry solid particles by an oil bath, grinding and sieving with a 150-mesh screen, soaking for 14 hours by lanthanum sulfate solution prepared by dissolving lanthanum oxide in sulfuric acid, and placing in a muffle furnace for calcining for 3 hours at 500 DEG C after suction filtration to obtain pale yellow solid which is a catalyst product. According to the method for preparing the chloracetate, azeotropic with-water performance of toluene is utilized, and a solvent secondary adding method is adopted to ensure anhydrous performance of the catalytic process. The solid super acid provided by the invention has good stability and can be repeatedly used. For the method for preparing the chloracetate, the process is simple, by-products do not exist, and the product is less toxic and harmless.

The invention discloses lubricating cutting fluid. The lubricating cutting fluid is prepared from the following raw materials in parts by weight: 3-4 parts of methacrylic acid, 4-5 parts of di-n-butyl phosphite, 2-3 parts of isopropyl myristate, 1-2 parts of 1-hydroxybenztriazole, 1-2 parts of stearic acid, 3-4 parts of barium ricinoleate, 0.8-1 part of amino trimethylene phosphonic acid, 0.1-0.2 part of dimethylamino propylamine, 4-5 parts of naphthenic oil, 2-3 parts of neutral barium dinonyl naphthalene sulfonate, 0.2-0.4 part of dialkyl p-diphenol, 70-80 parts of deionized water, 6-7 parts of rare-earth functional auxiliaries and 1-2 parts of polyethylene oxide. According to the lubricating cutting fluid, alkenyl succinate, lanolin and polyethylene glycol 4000 are firstly subjected to blended modification by the added rare-earth functional auxiliaries, and a stable anti-rusting effect is achieved; the added nano silica can play a certain role in lubricating, and cutting force, friction and power consumption are reduced; lanthanum sulfate not only has certain corrosion resistance, but also can improve anti-rusting and sustained-release effects; the auxiliaries of the lubricating cutting fluid have good hydrophilic and lipophilic properties and high emulsifying and dispersing properties, and thus, the corrosion resistance, lubricating property, anti-rusting property and stability of the finished product cutting fluid can be effectively improved.

The invention discloses an oxygen-containing lanthanum sulfate thin film and a preparation method thereof by layer-by-layer self assembly of nanosheets, and belongs to the technical field of materialscience. The oxygen-containing lanthanum sulfate thin film is made of (La, Eu)2O2SO4, and is 5-50nm in thickness. The preparation method of the thin film by layer-by-layer self assembly of the nanosheets comprises the following steps: mixing lanthanum nitrate solution and europium nitrate solution, adding and dissolving ammonium sulfate particles, then adding ammonia water, regulating pH to 6-10,reacting the obtained uniform suspension for 1-48 hours at the temperature of minus 4 to 4 DEG C, thus obtaining a product, separating and drying, and then adding absolute ethyl alcohol, thus obtaining nanosheet sol; adopting a spin-coating technology to spin-coat the nanosheet sol on a sapphire substrate subjected to infiltrating pretreatment, and by layer-by-layer spin-coating self assembly, obtaining a (La, Eu)2(OH)4SO4.nH2O precursor thin film; drying and calcining to obtain the (La, Eu)2O2SO4 thin film. The oxygen-containing lanthanum sulfate thin film and the preparation method disclosedby the invention have the advantages that the thickness of the oxygen-containing lanthanum sulfate thin film can be controlled by controlling the thickness of the precursor thin film; the film formation is convenient, and the film formation quality is high.

The invention discloses a Ni-Cu-La-B quaternary alloy plating solution. The Ni-Cu-La-B quaternary alloy plating solution comprises the following components: 20-40g / L of nickel chloride, 10-20g / L of copper sulfate, 0.5-10 g / L of lanthanum sulfate, 0.5-3 g / L of sodium borohydride, 40-50g / L of potassium sodium tartrate, 15-30g / L of ethylenediamine and 35-60g / L of sodium hydroxide. A method for chemically plating the glass fibers by using the Ni-Cu-La-B quaternary alloy plating solution comprises the following steps: using sodium borohydride as a reducing agent, adding the water-soluble lanthanum sulfate, and chemically plating the glass fibers by using the Ni-Cu-La-B quaternary alloy plating solution under the conditions of strong base and low temperature; plating layers are Ni-Cu-La-B alloy plating layers, wherein the content of boron is low (only about 0.5-5wt%), the content of nickel in the plating layers is high; the plating layers have good bonding force, electrical conductivity and wear resistance. Through observation with microscopes, the plating layers of the Ni-Cu-La-B quaternary alloy plated glass fibers prepared by using the method are compact; testing with an X-ray energy dispersive spectrometer shows that the surface chemistry components of the Ni-Cu-La-B quaternary alloy plated glass fibers contain 15-50wt% of Ni, 2-15wt% of Cu, 0.5-5wt% of La and 0.5-5wt% of B. The electric conducting glass fibers can be applied to the special fields of electromagnetic wave shielding, microwave absorption, invisibility, anti-static electricity and the like.