43 results about "Aluminum Oxalate" patented technology

The invention relates to a preparation method of tungsten alloy precursor compound powder, a tungsten alloy and a preparation method of the tungsten alloy, and belongs to the technical field of high-temperature structural materials. The preparation method of the tungsten alloy precursor compound powder comprises the following steps that a mixed dispersion solution of ammonium paratungstate, soluble ferric salt, soluble nickel salt and soluble aluminum salt is provided; the pH of the mixed dispersion solution is adjusted to be not higher than 1.5 by the aid of oxalic acid, after complete reaction, mixed powder is obtained through removal of a solvent, and then the tungsten alloy precursor compound powder is obtained. According to the preparation method of the tungsten alloy precursor compound powder, the pH of the mixed dispersion solution is adjusted by the aid of the oxalic acid, newly-produced tungstic acid, ferric oxalate, nickel oxalate and aluminum oxalate are subjected to commonreaction and co-precipitation, thus the uniformity and the consistency of various components of the mixed powder are improved, refined crystalline strengthening and dispersion strengthening of the tungsten alloy can be realized by the aid of the obtained compound powder, the toughness of the tungsten alloy can be improved while the strength of the tungsten alloy is substantially improved, and thenano ceramic particle dispersion reinforced high-strength and high-toughness tungsten alloy can be prepared from the compound powder.

The invention discloses a method for preparing vanadyl oxalate from vanadium slag through a short process, and belongs to the technical field of preparation for vanadyl oxalate. The method for preparing vanadyl oxalate from the vanadium slag through the short process comprises the following steps: roasting the vanadium slag to obtain roasted clinker; adding water and oxalic acid into the roasted clinker, and leaching and filtering; and concentrating and crystallizing a filtrate, and then carrying out solid-liquid separation to obtain vanadyl oxalate solid. According to the method for preparingvanadyl oxalate from the vanadium slag through the short process, oxalic acid is taken as a leaching agent, and on one hand, an acidic environment is provided for dissolving out vanadium from the clinker; and on the other hand, ferrous oxalate, calcium oxalate, manganese oxalate, magnesium oxalate and aluminum oxalate which have extremely low solubility are formed with iron, calcium, manganese, magnesium and aluminum in the clinker, and then the impurity elements are prevented from entering a leaching solution, so that one-step completion of leaching for vanadium and separation for the impurities is realized, and short process and low production cost are achieved.

A process for conversion of coal in a reaction vessel comprises steps of: admixing coal and powdered alumina clay to form reactants; injecting the reactants with a high-pressure steam jet into the reaction vessel; and producing aluminum oxalate ash and hydrogen. Preferably, the reaction vessel is pressurized to maximize the production of aluminum oxalate and hydrogen. Optionally, the process includes adding calcium carbonate if not present in the clay. The reactants in the reaction vessel are typically maintained a temperature of about 2,000 degrees Kelvin and a pressure of about 1 mega Pascals. To save energy, the process may include preheating water with the aluminum oxalate ash to aid in creating pressurized steam. The hydrogen may be mixed with air and burned in a combustion chamber, such as is found within a gas turbine-generator unit to produce electricity. Optionally the reactants may include an aqueous sodium hydroxide.

The invention discloses a flame retardant, transparent and heat insulating nano glass coating .The flame retardant, transparent and heat insulating nano glass coating is prepared from, by weight, 20-21 parts of nano antimony tin oxide, 0.2-0.3 part of a dispersing agent SN-5040, 79-81 parts of waterborne polyurethane resin, 30-35 parts of deionized water, 40-50 parts of N, N'-dimethylformamide, 20-22 parts of a sulfuric acid solution with the concentration being 20%, 20-22 parts of perfluoro caprylic acid, 3-4 parts of methyl methacrylate, 0.1-0.2 part of potassium persulfate, 3-3.5 parts of isocyanate, 0.4-0.5 part of sulfosalicylic acid, 0.3-0.4 part of edetic acid, 0.4-0.5 part of nano copper and 1.2-1.4 parts of a hydroxyl aluminum oxalate solution .According to the flame retardant, transparent and heat insulating nano glass coating, the sulfosalicylic acid and the edetic acid are utilized to modify the nano copper and the hydroxyl aluminum oxalate solution, the nano copper and hydroxyl aluminum oxalate are evenly dispersed in the coating, flame retardance and wear resistance are improved, and the shading property for ultraviolet light of the coating is further improved .

The invention relates to a method for preparing butyl butyrate by directly converting n-butyraldehyde. According to the method, n-butyraldehyde is used as a raw material, one or more than two of organic dibasic acid aluminum or organic tribasic acid aluminum such as aluminum oxalate, aluminum citrate, aluminum tartrate, aluminum malate, aluminum adipate, aluminum heptanedioate, aluminum dodecanedioate and the like are used as catalysts, the use amount of the catalyst is 0.2-1.0% of the mass of the n-butyraldehyde, the reaction temperature is 0-20 DEG C, the reaction time is 0.5-2 hours, and the n-butyraldehyde conversion rate and the butyl butyrate selectivity can reach more than 99%. The method has the advantages of short route, good atom economy, mild reaction conditions, catalyst recyclability, high raw material conversion rate, high product selectivity and the like.

A self-shielding flux-cored welding wire suitable for pipeline steel welding, consisting of a steel strip and flux-core powder, characterized in that the chemical composition and mass percentage of the powder are: 20-26% slagging agent, 10% aluminum oxalate gas-forming agent ~15%, Ge0.4~0.8%, Mn1.2~2.4%, Si0.4~0.8%, Ti0.2~0.4%, Al0.1~0.5%, Ni? 1.0~2.4%, albite 1.0~1.5%, the rest is iron powder, the powder filling rate is 18~22%. The invention provides a flux-cored welding wire for self-protection welding specially used for pipeline steel, which does not generate a large amount of smoke and harmful gas during the welding process, reduces splashing during the welding process, keeps the arc stable and has no obvious pores on the surface, and reduces the risk of melting. The content of nitrogen and oxygen in the pool ensures that the weld metal structure is refined and evenly distributed, and the low-temperature impact toughness is high. The invention is suitable for welding high-strength steel with a certain strength, and can especially meet the field operation requirements of outdoor large-diameter pipeline steel.

The present invention is the aluminum hydroxyoxalate and its preparation process. Aluminum hydroxyoxalate is used as fire retardant, and has molecular expression of Al2(C2O4)(OH)4, and X-ray diffraction spectrum with strong diffraction peaks at D values one 6.5149, 4.7263 and 4.2957 angstrom. Aluminum hydroxyoxalate is prepared through carbonization and decomposition and modification treatment, and through further crystal form controlling treatment, aluminum hydroxyoxalate with high dispersivity and complete crystal form may be obtained. Aluminum hydroxyoxalate has minimum one-dimensional size controlled in 40 nanometers to several microns, extrapolation onset weight-loss temperature higher than 340 deg.c, and weight-loss rate before 500 deg.c up to 51 %. As one kind of green fire retardant, aluminum hydroxyoxalate may be used in thermoplastic plastic and other polymer material with processing temperature over 210 deg.c.

The invention provides a porous ceramic material and a preparation method thereof, and belongs to the field of ceramic materials. The ceramic material is prepared from the following raw materials in parts by weight: 60 to 75 parts of aggregate; 5 to 10 parts of kaolin; 8 to 15 parts of tetrahydroxy aluminum oxalate; 1 to 3 parts of a fluxing agent; 3 to 7 parts of an adhesive; 0.5 to 2 parts of adispersing agent; 1 to 3 parts of a lubricating agent; and 15 to 18 parts of water. The tetrahydroxy aluminum oxalate releases gas in the firing process of ceramic mud, so that pore forming of the ceramic material is completed; superfine aluminum oxide obtained by decomposition is used as a ceramic component to be combined into a ceramic phase in situ; due to the addition of the fluxing agent, a temperature window generated by the decomposing and gas release of the tetrahydroxy aluminum oxalate in the firing process of the ceramic mud is matched with a temperature window generated by the low-melting ceramic phase, so that the problem that the ceramic does not generate a molten phase when a common pore-forming agent decomposes and releases gas is avoided, and the problem that the common pore-forming agent decomposes and discharges polluting gas is solved. The porous ceramic obtained by the method is uniform and through in pore channels, controllable in porosity and good in stability.

The invention relates to a phase change thermal storage material, and belongs to the technical field of ceramic materials. The material is prepared from the following steps that 1, quartz sand powder,corundum powder, copper oxide and zinc oxide are mixed to be uniform in proportion, compression moulding is conducted, then thermal treatment is conducted to obtain a screening material A; 2, the screening material A, carbon black and aluminum oxalate hydrate are mixed to be uniform in proportion, thermal treatment is conducted, and then an abrasive material B is obtained; 3, corundum particles,the corundum powder, the abrasive material B, an aluminium-silicon alloy and thermosetting phenolic resin are mixed to be uniform in proportion, compression moulding and thermal treatment are conducted, and a finished product is obtained. The phase change thermal storage material has the advantages of being large in thermal storage density, large in coefficient of thermal conductivity, high in compressive strength, high in thermal shock resistance, low in production cost, simple in process and the like.

A high-temperature phase-change heat storage material, which belongs to the technical field of ceramic materials, is prepared according to the following steps: in the first step, quartz sand powder, corundum powder, copper oxide, and zinc oxide are mixed uniformly in proportion, and heat-treated after pressing and forming to obtain sieved Material A; in the second step, the screening material A, carbon black, silicon powder, and aluminum oxalate are mixed evenly according to the proportion, and the grinding material B is obtained after heat treatment; in the third step, the corundum particles, corundum powder, grinding material B, aluminum silicon Alloy, silicon powder, silicon carbide powder, and thermosetting phenolic resin are mixed evenly according to the proportion, and the finished product is obtained after compression molding and heat treatment. The working temperature of the high-temperature phase change heat storage material prepared by this method is greater than 600°C, and it has high heat storage density and thermal conductivity. Large size, high compressive strength, high thermal shock stability, low production cost and simple process.

The invention relates to a temperature-resistant polyvinyl chloride material which includes: polyvinyl chloride, modified graphite, modified paraffin, polymaleic acid, metal filled graphite, diisodecyl pentaerythritol diphosphite and magnesium stearate; wherein the modified graphite is prepared through a reaction to hydrofluoric acid, hydrosulfuric acid, graphite, isopropanol and silver powder; the modified paraffin is prepared through a reaction to ethanol, paraffin, dimethyl formamide and copper powder; the metal filled graphite is prepared through a reaction to aluminum powder coating silver powder, graphite, chlorosulfonic acid and dimethyl formamide; and the aluminum powder coating silver powder is prepared through a reaction to silver oxalate, aluminum oxalate, sodium oxalate, polyvinyl alcohol 1000 and water. The polyvinyl chloride material has excellent temperature resistance and mechanical strength.

The invention relates to a preparation method for a ternary composite cathode material for a germanium-coated lithium ion battery. The chemical formula of the cathode material is LiNi1-x-yAlxCoyO2-zFz, wherein x is 0.26 to 0.32, y is 0.18 to 0.22, and z is 0.005 to 0.01. The method comprises the following steps: (1) preparing nickel oxalate, aluminum oxalate and cobalt oxalate into a mixed solution, adding argon into the prepared metal ion solution, stirring, heating, instilling a KOH solution into a stirred reactor very slowly to produce (Ni1-x-yAlxCoy)(OH)2 sedimentation, filtering, washing, and drying so as to obtain a granulous (Ni1-x-yAlxCoy)(OH)2 precursor; (2) respectively weighing the precursor, lithium hydroxide and lithium fluoride, performing ball-milling, drying, and sintering so as to obtain the ternary composite cathode material LiNi1-x-yAlxCoyO2-zFz; (3) obtaining germanium oxide coated LiNi1-x-yAlxCoyO2-zFz through the adoption of germanium sol coating. According to the preparation method for the cathode material, a wet method is adopted to prepare the ternary material precursor so as to obtain higher energy density and material activity; a solid phase sintering method is adopted to dope F in the material to further improve the stability of the material, and finally the germanium coating is adopted to improve the overall performance of the material.

The present invention relates to a preparation method and application of mildew-proof tanning protein filler. Take 42g of collagen powder, add the etherified amino resin and 60g of water obtained in the step into a three-necked flask, adjust the pH of the system to 8-9, and set the pH at 70 Stir and react at ~90°C for 1~2h, then add 1~5g of aluminum oxalate and 1.2~3.4g of substance A, stir and react at 60~80°C for 30min~75min, and vacuum dry to obtain mildew-resistant tanning protein filler. The anti-mildew tanning protein filler is used in the retanning filling process of leather, and the obtained leather has anti-mildew.