28 results about "Zirconium(IV) hydroxide" patented technology

A flexible material is disclosed comprising a flexible substrate, a sorbent comprising zirconium hydroxide and a binder, wherein the solids weight ratio of the binder to the zirconium hydroxide is in the range 1:1 to 1:120. Also disclosed is a process for production of a fabric, comprising: providing a flexible material, providing at least one sorbent dispersion comprising zirconium hydroxide and a binder, applying the sorbent dispersion to the flexible material to produce a treated flexible material, squeezing the treated flexible material under pressure, and passing the pressed treated flexible material through a stenter.

The invention provides a preparation method and application of an amorphous zirconium-doped manganese oxide catalyst, and belongs to the field of organic catalytic synthesis. The catalyst is Zr-MnO2-x, and is rich in lattice oxygen with high activity and high stability; x is the molar ratio of Zr to the sum of Mn and Zr, and x is larger than or equal to 0.2 and smaller than or equal to 0.6; zirconium mainly exists in the form of zirconium hydroxide. The preparation method comprises the following steps: slowly dropwise adding a mixed salt solution of a zirconium source and a manganese source into a precipitant under a continuous stirring condition, and carrying out a co-precipitation reaction; after the reaction is completed, standing and aging, carrying out solid-liquid separation and collecting a precipitate; and washing and drying to obtain the amorphous zirconium-doped manganese oxide catalyst which is used for catalyzing aniline and derivatives thereof to synthesize azobenzene compounds. According to the invention, the characteristic of'difunctional lattice oxygen 'with high activity and high stability is introduced through zirconium doping, and the catalyst has the advantages of high activity, high selectivity, wide substrate applicability, excellent stability and reusability and the like when used for catalytic synthesis of azobenzene compounds.

The invention discloses a water body composite phosphorus locking agent and a preparation method thereof, and belongs to the technical field of water quality treatment. The composite phosphorus locking agent for the water body comprises the following raw material components in parts by weight: 0.5-1.5 parts by mass of modified zirconium hydroxide, 4 parts by mass of sodium alginate, 2.3-2.5 parts by mass of a composite organic material, 6 parts by mass of calcium chloride and 1-3 parts by mass of ferric trichloride, the modified zirconium hydroxide is obtained by modifying zirconium hydroxide with epoxy chloropropane; the composite organic material is prepared from diethanol amine and chitosan; the water body composite phosphorus locking agent prepared by the method is relatively high in phosphorus removal rate.

The invention relates to the technical field of plasticizers, in particular to a trioctyl citrate plasticizer as well as a preparation process and application thereof. The preparation process comprises the following steps: preparation of a catalyst: dispersing attapulgite in an ethanol solution of tetrabutyl titanate and cerous nitrate, dropwise adding a sulfuric acid solution and a zirconium hydroxide solution into the ethanol solution, adding a stabilizer anhydrous sodium sulfate, stirring for 20-24 hours at 70-80 DEG C, filtering, washing with distilled water, and drying for 3-4 hours at 60-70 DEG C to obtain the catalyst; grinding the attapulgite into fine powder, and roasting at the temperature of between 400 and 500 DEG C for 3.5 to 4.5 hours, so as to obtain the Zr-Ce-TiO2 / attapulgite composite catalyst. The method comprises the following steps: mixing citric acid, n-caprylic alcohol, a catalyst and cyclohexane, heating and refluxing until the acid value does not change any more, and after the reaction is finished, naturally cooling, washing, separating liquid and dealcoholizing under reduced pressure to obtain the n-caprylic acid.

A gas barrier film including a reaction product formed by a reaction of a zirconium oxide and a phosphoric acid compound, where the zirconium oxide is an amorphous zirconium oxide containing as a main component zirconyl hydroxide and / or zirconium hydroxide. A gas barrier laminate including the gas barrier film and a composition for forming a gas barrier layer.

A flexible material is disclosed comprising a flexible substrate, a sorbent comprising zirconium hydroxide and a binder, wherein the solids weight ratio of the binder to the zirconium hydroxide is in the range 1:1 to 1:120. Also disclosed is a process for production of a fabric, comprising: providing a flexible material, providing at least one sorbent dispersion comprising zirconium hydroxide and a binder, applying the sorbent dispersion to the flexible material to produce a treated flexible material, squeezing the treated flexible material under pressure, and passing the pressed treated flexible material through a stenter.

The invention discloses a zirconium hydroxide powder material and a preparation method and defluorination application thereof. The zirconium hydroxide powder material comprises ZrO (OH) 2, the specific surface area is larger than 55.7 m < 2 > / g, and the zirconium hydroxide powder material has high adsorption activity, has a good defluorination effect when applied to defluorination of an aqueous solution and plays a role in reducing the dosage of a defluorination agent. The zirconium hydroxide powder material is good in regeneration effect after defluorination, the regeneration process is simple, and the consumed time is short. The zirconium hydroxide powder is obtained by mixing commercially available zirconium hydroxide with ammonia water, standing and then carrying out heat treatment, and the method is simple, controllable and suitable for industrial production.

The invention belongs to the technical field of wastewater treatment, and discloses a supported zirconium hydroxide adsorption material convenient to separate as well as a preparation method and application thereof. According to the invention, the absorbent cotton which is cheap and easy to obtain is used as a carrier, a zirconium hydroxide adsorbent is prepared by using a zirconium oxychloride hydrolysis method, and the adsorbent can coat the surface of the absorbent cotton fiber in the hydrolysis process, so that the supported zirconium hydroxide adsorption material convenient to separate can be obtained. The supported zirconium hydroxide adsorption material can effectively remove various anions in a solution, is easy to separate and recover in the adsorption process, is low in loss rate and lower in production cost, can be repeatedly utilized, and is beneficial to large-scale production and popularization.

The invention discloses a B2O3 / ZrO2 composite catalyst as well as a preparation method and application thereof. The B2O3 / ZrO2 composite material is prepared by taking boric acid as a boron source and zirconium hydroxide as a zirconium source through a two-step method of solution acid-base reaction and high-temperature calcination. The synthesis method is simple, the obtained composite material is special in morphology, meanwhile, the catalytic advantages of boron oxide and zirconium oxide are combined, and the composite material has high catalytic activity and stability in the thermocatalytic propane oxidative dehydrogenation process, so that the composite material has great development prospects.

The invention relates to the field of electrochemical acetylene reduction, in particular to a preparation method and application of a cadmium-modified copper-based electrocatalyst. The catalyst comprises a zirconium hydroxide carrier; the copper-cadmium heterostructure is loaded on the zirconium hydroxide carrier and is formed by a cadmium-modified copper simple substance. The electrocatalyst is applied to electrochemical acetylene reduction to generate ethylene, not only has high activity on acetylene hydrogenation to ethylene, but also has an excellent effect of inhibiting acetylene carbon-carbon coupling, inhibits the Faraday efficiency of a C4 product to 0.06% under a relative reversible hydrogen electrode-0.5 V in acetylene gas flow with a volume fraction of 5%, and has a good application prospect. The Faraday efficiency of the main product ethylene reaches 98.38%, and 99.99% of ethylene selectivity is realized in ethylene-rich gas flow containing trace acetylene. Compared with other copper-based electrochemical acetylene reduction catalysts, the copper-based electrochemical acetylene reduction catalyst has a maximum inhibition effect on a carbon-carbon coupling side reaction, realizes high Faraday efficiency and selectivity of ethylene, and can inhibit generation of ethane and hydrogen at the same time.

The invention discloses a preparation method of a broad-spectrum protective zirconium-based adsorbing material, and belongs to the technical field of adsorbents, the preparation method comprises the following steps: adding a dispersing agent into a zirconium oxychloride aqueous solution, and stirring at normal temperature to obtain a suspended emulsion to obtain zirconium oxychloride suspension slurry; adding a composite surfactant into the zirconium oxychloride suspension slurry, and stirring at a high speed to obtain a suspension; dropwise adding a sodium hydroxide solution in a stirring state, hydrolyzing to generate a precipitate, standing the precipitate, filtering, washing, drying, and crushing to obtain a surface modified zirconium hydroxide particle sample; preparing an impregnation liquid: adding sodium bicarbonate, basic cupric carbonate, potassium carbonate, silver nitrate and ammonium molybdate into pure water, stirring and dissolving to obtain the impregnation liquid; and adding the obtained impregnation liquid into a modified zirconium hydroxide particle sample. After a substrate material is loaded with metal active components, ammonia gas and a copper reaction center are complexed, a coordination compound is formed through weak chemical adsorption, and the purpose of ammonia gas protection is achieved.

A zirconium hydroxide powder having, in a pore distribution based on a BJH method, a peak top in a pore diameter region of 1 nm or more and 5 nm or less, and having a pore volume in the pore diameter region of 1 nm or more and 5 nm or less of 0.15 cm3 / g or more.

The present invention addresses the problem of providing: a zirconium oxide powder obtained by reducing the particle diameter of secondary particles; and a method for producing the same. A zirconium oxide powder according to the present invention has: a crystal phase consisting solely of monoclinic crystals; and a unimodal particle size distribution. A method for producing the zirconium oxide powder according to the present invention comprises: a reaction step in which heated ammonium peroxodisulfate is added to heated zirconium oxychloride to obtain a basic zirconium sulfate slurry; a dehydration step in which the basic zirconium sulfate slurry is neutralized by adding ammonia water thereto to obtain a zirconium hydroxide slurry, and then a solvent is removed to obtain a zirconium hydroxide cake; a repulp washing step in which the zirconium hydroxide cake is subjected to repulp washing using ammonia water; a firing step in which the zirconium hydroxide cake is fired in a furnace using superheated steam to obtain zirconium oxide; and a crushing step in which the zirconium oxide is crushed to obtain a zirconium oxide powder.

The present invention belongs to the field of carbon resource utilization technology C1 chemistry. 2+ The invention discloses a method for preparing a catalyst for oxygen-containing compounds, comprising the following steps: co-precipitating any two or three nitrates of Ce, La, Ga, and Ir with an alkaline solution in a suspension of zirconium hydroxide, zinc hydroxide, and calcium hydroxide, and then sequentially aging, washing, filtering, drying, and roasting, and then grinding to form a powder; placing one of SiO2 molecular sieve, titanium silicon molecular sieve, and mordenite treated with 30-50% by weight nitric acid or 50-70% by weight hydrogen peroxide in a mixed solution of any three nitrates of Co, Ni, W, Sr, Cs, Cu, and Fe, and performing the process of placing, stirring, and heating the mixture into a paste; and sequentially washing, drying, and roasting the mixture, and then grinding the mixture into a powder; and mixing the mixture by ball milling at a mass ratio of 1-4.

The present invention provides a zirconium hydroxide modified NaA molecular sieve, its preparation method and application, relating to the technical fields of molecular sieve synthesis and water treatment. In the present invention, coal gangue is calcined and activated to obtain metakaolin; the metakaolin is mixed with sodium hydroxide, an aluminum source, a zirconium source and water to obtain an initial solution; the initial solution is aged, and the obtained precursor solution is hydrothermally crystallized to obtain a zirconium modified NaA molecular sieve; the zirconium modified NaA molecular sieve is subjected to NH4 + ion exchange and Zr 4+ ion exchange. After the obtained ZrA molecular sieve is impregnated with a soluble zirconium salt solution, it is mixed with an alkali solution for a precipitation reaction to obtain a zirconium hydroxide modified NaA molecular sieve. The present invention can effectively solve the problem of coal gangue accumulation pollution and turn waste into treasure; the present invention can make zirconium hydroxide combine better with the NaA molecular sieve and have a larger zirconium hydroxide loading amount, achieving excellent sulfate adsorption performance; the method of the present invention has a simple process and low cost.

The application belongs to the technical field of organic synthesis, and particularly relates to application of zirconium hydroxide as a catalyst in preparation of N-phenyl formamide or a derivative thereof from aniline or a derivative thereof. The application finds that N-phenyl formamide or a derivative thereof can be synthesized through catalytic oxidation reaction from aniline or a derivative thereof as raw material, zirconium hydroxide as a catalyst, and oxygen as an oxidant; the zirconium hydroxide catalyst can be directly purchased or prepared from a zirconium salt precursor by using a simple precipitation method, and is low in price; the application is simple in operation, low in production cost, high in yield, and easy to be industrialized.

The invention belongs to the technical field of preparation of zirconium hydroxide, and particularly relates to a zirconium hydroxide washing device which comprises a controller and a plurality of washing units, each washing unit comprises a washing pool, one end of each washing pool is provided with a water inlet pipe, and the other end of each washing pool is provided with a water outlet pipe; a water washing tank is detachably connected into the water washing pool, and zirconium hydroxide precipitates can be contained in the water washing tank; a plurality of through holes are respectively formed in the washing tank close to the water inlet pipe and the water outlet pipe; filter frames are detachably connected to the side, close to the water inlet pipe and the side, close to the water outlet pipe, in the washing tank, and filter cloth is clamped in the filter frames; a chloride ion concentration analyzer is mounted on the water outlet pipe, and the output end of the chloride ion concentration analyzer is in communication connection with the controller; compared with the prior art, the method has the advantages and positive effects that zirconium hydroxide is not washed by a filter press any more, white zirconium hydroxide precipitates are dispersed in deionized water instead of being in a filter cake shape, and thorough washing of the zirconium hydroxide precipitates is facilitated.

The invention provides a zirconium hydroxide modified NaA molecular sieve as well as a preparation method and application thereof, and relates to the technical field of molecular sieve synthesis and water treatment. The preparation method comprises the following steps: roasting and activating coal gangue to obtain metakaolin; mixing the metakaolin with sodium hydroxide, an aluminum source, a zirconium source and water to obtain an initial solution; aging the initial solution, and performing hydrothermal crystallization on the obtained precursor solution to obtain a zirconium modified NaA molecular sieve; and sequentially carrying out NH4 + ion exchange and Zr < 4 + > ion exchange on the zirconium modified NaA molecular sieve, dipping the obtained ZrA molecular sieve in a soluble zirconium salt solution, mixing with an alkali solution, and carrying out a precipitation reaction to obtain the zirconium hydroxide modified NaA molecular sieve. The problem of pollution caused by accumulation of coal gangue can be effectively solved, and waste is turned into wealth; according to the invention, the zirconium hydroxide can be better combined with the NaA molecular sieve, the loading capacity of the zirconium hydroxide is larger, and excellent sulfate radical adsorption performance is realized; the method is simple in process and low in cost.

The invention relates to the field of decontaminant preparation, in particular to a preparation method of a Zr (OH) 4-MnO2 composite metal oxide decontaminant with efficient digestion performance on mustard gas. Zirconium hydroxide is used as a carrier, manganese dioxide is deposited and loaded on zirconium hydroxide through a chemical reaction to prepare the Zr (OH) 4-MnO2 composite metal oxide decontamination agent, the defect that Zr (OH) 4 is low in mustard gas digestion performance can be overcome, and the Zr (OH) 4-MnO2 composite metal oxide decontamination agent has the capability of rapidly digesting mustard gas, so that the Zr (OH) 4-MnO2 composite metal oxide decontamination agent can be better applied to the decontamination field; according to the present invention, the Zr (OH) 4-MnO2 composite metal oxide is prepared by doping and loading MnO2 in the carrier zirconium hydroxide, the metal oxide has characteristics of lattice distortion, defect increase and active site increase due to component doping, and the decontamination agent has characteristics of Zr and Mn metal oxides so as to substantially improve the digestion performance of the decontamination agent on mustard gas;

The invention relates to the technical field of lithium ion batteries, in particular to a positive electrode material precursor, a preparation method thereof and a positive electrode material. The positive electrode material precursor comprises nickel-cobalt-manganese hydroxide with a chemical general formula of NixCoyMnz (OH) 2, 0.4 < = x < = 0.5, 0.3 < = y < = 0.4, 0.2 < = z < = 0.3, and the sum of x, y and z is 1; zirconium hydroxide is also doped in the nickel-cobalt-manganese hydroxide, and the molar content of the zirconium hydroxide is 2500-5000 ppm. The precursor adopts a middle-nickel and middle-cobalt system design, so that the contents of cobalt and manganese are increased, and after a positive electrode material is further prepared, cobalt is beneficial to reducing lithium-nickel mixing, manganese is beneficial to stabilizing a layered structure, the structural stability of the material is greatly improved, the rate capability and the cycle stability are improved, and the service life is prolonged. Meanwhile, the doped zirconium hydroxide is beneficial to the preparation of the positive electrode material from the precursor, further reduces lithium-nickel mixing, reduces structural transformation, promotes lithium ion diffusion, and further improves the cycle performance and the rate capability.

This invention relates to a nano-zirconium hydroxide, its preparation method, and its application in a catalytic method for n-butane skeletal isomerization. The nano-zirconium hydroxide has a spherical and / or near-spherical morphology with a particle size distribution of 10-30 nm. The nano-zirconium hydroxide described in this invention is particularly suitable as a catalyst support, especially as a support for n-butane isomerization catalysts, and can improve the single-pass conversion of n-butane and the selectivity of isobutane.

The specification describes a zirconia support comprising ≥ 95 wt% ZrO2, wherein: the support has a crush strength of 20 to 140 N; the support has a total pore volume of 0.10 to 0.40 mL / g when measured by N2 physisorption; the support has an acid site density of 15 to 30 µLNH3 / m2; and the support has a basic site density of 0.006 to 0.015 wt% / m2 as measured by the MBOH test. Also described is a method for producing a zirconia supporting starting from zirconia or zirconium hydroxide as raw materials.

This invention discloses a zirconia-supported noble metal catalyst, its preparation method, and its application, belonging to the technical field of preparation and application of supported noble metal catalysts. Using zirconium nitrate as a precursor, zirconium hydroxide is obtained via co-precipitation, followed by high-temperature calcination to prepare a zirconia support with a specific crystal phase composition. Palladium nanoparticles are then loaded onto the ZrO2 surface using an impregnation-reduction method to obtain a Pd / ZrO2 catalyst. In the prepared catalyst, palladium nanoparticles are uniformly dispersed on the support surface, with an average particle size of 1.7 nm, and the support contains abundant acidic sites. This invention features a simple preparation method, low noble metal usage, and high catalyst activity, exhibiting excellent catalytic performance in the hydrogenation and deoxygenation of 5-hydroxymethylfurfural to 2,5-dimethylfuran. Under low acid conditions of 150 °C, 1.5 MPa H2, and formic acid as the hydrogen donor, complete HMF conversion can be achieved, with a DMF selectivity of 83% and a conversion frequency of 224 h⁻¹. ‑1 Even after five cycles of use, it still maintains an 81% conversion rate and a 61% selectivity, showing good prospects for industrial application.

The present invention discloses a catalyst for preparing 1,3-propylene glycol from glycerol and a method for preparing 1,3-propylene glycol using a loop reactor. The catalyst is powdered Pt / WO3-ZrO2, prepared from WO3-ZrO2 composite oxide and chloroplatinic acid, wherein the element Pt in chloroplatinic acid is 1.5% of the mass of the WO3-ZrO2 composite oxide, and the WO3-ZrO2 composite oxide is prepared using ammonium tungstate and zirconium hydroxide powder as main raw materials. The mass ratio of element W to element Zr in the raw materials ammonium tungstate and zirconium hydroxide is measured according to the mass ratio of WO3:ZrO2 of (3-20):100. The present invention uses a platinum catalyst supported by a doped tungsten-zirconium carrier as a catalyst, and combines a loop reactor to carry out a glycerol hydrogenation reaction to prepare 1,3-propylene glycol, effectively improving the glycerol conversion rate and the selectivity of the product 1,3-propylene glycol, the utilization rate of the catalyst, effectively reducing production costs, and achieving green energy saving.

The present invention discloses a positive electrode material of surface-modified lithium zirconate and a preparation method thereof. The preparation method of the positive electrode material comprises the following steps: S1, preparing a solution A of a soluble zirconium salt; S2, preparing a solution B of precipitants 1 and 2; S3, adding a hydroxide precursor material to solution A, and ultrasonically dispersing to obtain a suspension; S4, adding solution B to the suspension for reaction; S5, after the reaction in S4 is completed, treating to obtain a precursor material of surface-coated zirconium hydroxide; S6, mixing the precursor material of surface-coated zirconium hydroxide with a lithium salt, and calcining to obtain the material. The lithium zirconate coating layer formed on the surface of the positive electrode particles of the present invention protects the positive electrode material and avoids direct contact with the electrolyte. In addition, unlike the traditional inert oxide coating layer, the modified layer has lithium ion conductivity, the surface-coated and bulk-gradient-doped samples have a small reversible capacity loss, the coating layer is highly compatible with the substrate, and it is avoided to fall off during multiple charge and discharge cycles.

The invention relates to the technical field of catalysts, in particular to a copper-zirconium bimetallic oxide nano-composite catalyst as well as preparation and application thereof. The preparation method comprises the following steps: dissolving a precursor salt of copper and zirconium hydroxide, uniformly mixing, and adding an ammonia water solution to obtain a copper-zirconium precursor solution; and carrying out post-treatment on the copper-zirconium precursor solution, and then carrying out roasting treatment to obtain the copper-zirconium bimetallic oxide nano composite catalyst. The preparation method of the copper-zirconium bimetallic oxide nano-composite catalyst has the advantages that the process is simple, the reaction condition is mild, the prepared copper-zirconium bimetallic oxide nano-composite catalyst is good in copper dispersity, and the product has the advantages of strong adsorption to * CO, high conductivity and the like; when the prepared copper-zirconium double-metal oxide nano composite catalyst is further used for preparing methane through electrocatalysis CO2 reduction, the catalyst can effectively inhibit hydrogen evolution side reaction, is high in stability and has high selectivity and excellent stability on methane.

The application belongs to the technical field of organic synthesis, and particularly relates to selective oxidation of thioether to prepare sulfoxide and sulfone by using zirconium hydroxide as a catalyst. The application uses thioether as raw material, zirconium hydroxide as catalyst, and hydrogen peroxide as oxidant. Sulfoxide can be catalytically oxidized and synthesized in a short reaction time, and sulfone can be obtained by prolonging the reaction time. The selectivity can be regulated only by the reaction time without any additives. The zirconium hydroxide catalyst can be directly purchased or prepared by using a simple precipitation method with zirconium salt as a precursor, and is low in price. Hydrogen peroxide is used as an oxidant, and is green, stable, low in cost, high in atomic efficiency (47% active oxygen), and has water as the only by-product. In addition, the reaction process is simple in operation, low in cost, and high in yield, and has great industrial application prospect.

The invention relates to a preparation method of a high-thermal-expansion aluminum phosphate-based high-temperature adhesive. The preparation method comprises the following operation steps: preparing a high-expansion regulator from mixed boron carbide and zirconium diboride; adding silicon powder into the regulator to prepare an adhesive filler; performing hydro-thermal synthesis to obtain an aluminum phosphate gel base solution; doping zirconium hydroxide into the gum base solution to prepare an adhesive base solution; and mixing the adhesive basic solution with the filler to prepare the high-expansion aluminum phosphate-based high-temperature-resistant adhesive. According to the high-temperature adhesive disclosed by the invention, the aluminum phosphate gel base solution doped with zirconium hydroxide is used as the adhesive base solution, and the content of zirconium dioxide in the adhesive is further increased by adding zirconium diboride, so that the aim of improving the thermal expansion coefficient of the adhesive is fulfilled. The high-temperature adhesive can provide shear strength not lower than 3 MPa for ZrO2 ceramic within the treatment temperature range of RT-1500 DEG C. When the treatment temperature is higher than 600 DEG C, the shear strength of the bonding piece is increased along with the increase of the heat treatment temperature, and the shear strength of the bonding piece calcined at 1500 DEG C is 41.2 MPa. After treatment at 1500 DEG C, the thermal expansion coefficient of the calcined adhesive can reach 8.9 * 10 <-6 > K <-1 >, which is obviously improved compared with that of a commercial aluminum dihydrogen phosphate adhesive.