197 results about "Tributyl phosphate" patented technology

The invention belongs to the field of hydrometallurgy, and particularly relates to an extraction organic phase for selectively extracting niobium in a niobium-containing sulfuric acid solution and an extraction method, the extraction organic phase comprises a component a, a component b and a hydrophobic solvent; wherein the component a is a compound with a structure # imgabs0 # as shown in a formula 1; the component b comprises at least one of TBP (tributyl phosphate), MIBK (methyl isobutyl ketone), sec-octanol or isooctanol; r1 is alkyl of C1-C2, and R2 is alkyl of C1-C2; r < 2 > is alkyl of C < 7 > to C < 11 >; a is HCO3 <-> or CO3 < 2->; n is the absolute value of the valence of A. Based on the combination of the component a and the component b, the extraction rate of niobium in the sulfuric acid solution and the extraction separation selectivity of niobium and other elements can be further improved based on the combination and synergy of the components.

The invention provides a uniaxially stretched polyethylene composite film material as well as a preparation method and application thereof, and belongs to the technical field of film materials. According to the invention, through ultrasonic stripping, 3-aminopropyltriethoxysilane modification and N, N-dimethyl octadecyl ammonium chloride intercalation, the dispersibility and interfacial compatibility of montmorillonite are improved, and zinc oxide is introduced to endow antibacterial and ultraviolet shielding functions; maleic anhydride grafting enhances the interface bonding force; in metallocene polyethylene modification, through synergistic grafting of maleic anhydride and glycidyl methacrylate, a polar group is introduced, so that the compatibility of the metallocene polyethylene and a polar nano material is improved, and the flexibility and the processability are improved; magnesium chloride promotes grafting efficiency, and tributyl phosphate improves dispersibility and fluidity. The barrier property, the mechanical property and the processability of the composite material are enhanced through the synergistic effect, and the application requirement of a high-performance film is met.

The invention provides a method for preparing high-purity hafnium tetrachloride by wet extraction and separation, which comprises the following steps: stirring and leaching hafnium alloy waste serving as a raw material by using HNO3 and HF mixed acid, then adding thioacetamide, adjusting the pH value to 4-5, stirring and filtering; compounding tributyl phosphate, trioctylphosphine oxide and sulfonated kerosene to obtain a composite extracting agent, and stirring and mixing to form a homogeneous organic phase; in a hydrochloric acid medium, controlling the volume ratio of an organic phase to a water phase to be (2.5-3.5): 1, carrying out three-stage counter-current extraction, and standing for phase splitting; the extracted organic phase passes through an adsorption column filled with iminodiacetic acid modified silica gel; and carrying out reverse extraction by using a hydrochloric acid solution, and then carrying out reduced pressure evaporation concentration, cooling crystallization and dehydration to obtain hafnium tetrachloride. According to the method, the zirconium and hafnium separation efficiency in the hafnium tetrachloride preparation process is improved, and the problem that the content of zirconium and hafnium impurities in the product is too high is solved.

The invention discloses a self-induction fire extinguishing material, a fire extinguishing rope and application, and relates to the technical field of electrical safety, and the self-induction fire extinguishing material is prepared from the following components in percentage by mass: 84.6 to 88 weight percent of perfluorohexanone, 4.8 to 5.6 weight percent of SiO2-CaO-Chit, 5.5 to 6.8 weight percent of epoxy resin, 1.8 to 2.3 weight percent of glass fiber, 0.01 to 0.2 weight percent of tributyl phosphate and 0.01 to 0.2 weight percent of sodium hydroxide. The preparation method of the SiO2-CaO Chit comprises the following steps: step 1, preparing raw materials: taking chitosan, SiO2, CaO, isopropyl acetate and deionized water for standby application; step 2, primary reaction: putting chitosan into deionized water, activating and washing to obtain activated chitosan; step 3, secondary reaction: mixing the activated chitosan, deionized water and isopropyl acetate, stirring, cooling, filtering and collecting a solid material to obtain a secondary reaction fixing material; and step 4, composite reaction: mixing SiO2 with CaO, adding a secondary reaction fixing material, continuously stirring until the mixture is uniform, and cooling to room temperature. The fire extinguishing agent has the effects of resisting high temperature and low temperature and keeping a long-acting and lasting fire extinguishing function.

The invention discloses a precipitation separation and purification method for metals in gallium-containing wastes. The method comprises the following steps: firstly, dissolving the waste containing gallium, indium and tin with acid, then adding alkali liquor, and adjusting the pH value of the solution twice to respectively obtain a precipitate containing tin, a precipitate containing gallium and indium and a solution containing zinc; after the sediment stands for a period of time, slurry is added for filtering, obtained filter residues return to a slurry barrel, obtained tin-containing filtrate is used for preparing a high-purity tin product, obtained gallium and indium-containing filtrate is extracted with an extracting agent mainly comprising tributyl phosphate or trioctyl / decyl alkyl tertiary amine and the like, high-purity gallium is obtained in an organic phase, and high-purity indium is obtained in raffinate. According to the method, separation and purification of gallium, indium, tin and zinc are achieved through two-time precipitation and two-time filtration. Precipitation operation is simple, a precipitant is cheap and easy to obtain, and the separation method is low in cost.

The invention discloses a gas diffusion layer with a gradient pore structure and a preparation method of the gas diffusion layer. The preparation method comprises the following steps: 1, immersing a titanium diamond net into liquid paraffin; 2, absolute ethyl alcohol, tributyl phosphate, polyvinyl butyral and two kinds of spherical titanium powder with different granularities are evenly mixed to prepare second slurry containing coarse-grained spherical titanium powder and first slurry containing fine-grained spherical titanium powder, and the second slurry and the first slurry are sequentially sprayed to the surface of the titanium rhombus net filled with paraffin; and 3, degreasing and sintering the sprayed titanium diamond net for one-step forming to obtain the gas diffusion layer with the gradient pore structure. According to the method, the slurry containing the spherical titanium powder with the coarse granularity and the spherical titanium powder with the fine granularity is sequentially sprayed on the titanium diamond net and sintered, the gas diffusion layer with the gradient hole structure is obtained, it is guaranteed that the gas diffusion layer has the high catalyst utilization rate, high mechanical strength and good gas-liquid transmission, and the structure can be adjusted according to the actual working condition so as to regulate and control the performance of the gas diffusion layer; the method is suitable for the field of PEM electrolytic hydrogen production.

The invention discloses mongolian mongolian yeast and an application thereof. Relates to the technical field of fermentation. The invention provides a specific strain and application thereof in tobacco leaves. According to the tobacco leaf extracting solution fermented by the bacterial strain, the content of esters such as 2, 2, 4-trimethyl-1, 3-pentanediol monoisobutyrate, tributyl phosphate, dihydroactinidiolide, dibutyl phthalate, 3-(3, 5-di-tert-butyl-4-hydroxyphenyl) methyl propionate and methyl palmitate is remarkably increased, and the content of the esters such as 2, 2, 4-trimethyl-1, 3-pentanediol monoisobutyrate, tributyl phosphate, dihydroactinidiolide, dibutyl phthalate, 3-(3, 5-di-tert-butyl-4-hydroxyphenyl) methyl propionate and methyl palmitate is remarkably increased; three novel ester substances with fruit fragrance, rosin and other characteristic fragrances are newly generated, and the overall fragrance style is remarkably enhanced. It is shown that the aroma-producing caribeckia mongolica yeast MC-5 fermented tobacco leaf extracting solution has good aroma-producing capacity, and through the combined effect of enzymolysis and fermentation, the aroma-producing caribeckia mongolica yeast MC-5 fermented tobacco leaf extracting solution is expected to play an important application value in the field of quality improvement and aroma enhancement of tobacco leaf raw materials.

The invention belongs to the technical field of wood flame-retardant modification, and particularly relates to a metal-based ionic liquid compound flame retardant and a method for preparing flame-retardant wood by using the same. The preparation method comprises the following steps: putting 1-methylimidazole and tributyl phosphate into a reaction container, heating, condensing and refluxing to obtain an ionic liquid flame retardant containing 1-butyl-3-methylimidazole dibutyl phosphate; wood is sequentially soaked in a solution containing trivalent metal ions and an ionic liquid flame retardant, the metal ionic liquid flame retardant is generated in gaps of the wood in situ, and the smoke abatement type flame retardant modified wood can be prepared through drying in the shade, drying and water balance. The imidazolium ionic liquid and the metal trivalent ions are subjected to complexation reaction in the wood to form the metal type ionic liquid flame retardant, the purposes of smoke abatement, flame retardance, loss resistance and the like are achieved, and the application of the wood flame retardant technology and flame retardant wood products is expanded.

The invention provides a composite extraction agent and application thereof in separation and recovery of lithium from lithium precipitation mother liquor. Relates to the technical field of composite extraction. The composite extraction agent comprises an extraction agent, a synergistic extraction agent and a diluent, the extraction agent comprises one or more of 1, 3-bis (4-fluorophenyl)-1, 3-propanedione, 2, 2-difluoro-1, 3-diphenyl-1, 3-propanedione, 1-phenyl-3-isoheptyl-1, 3-propanedione and benzoyl trifluoroacetone, and the diluent comprises one or more of 1, 3-bis (4-fluorophenyl)-1, 3-propanedione, 2, 2-difluoro-1, 3-diphenyl-1, 3-propanedione, 2, 2-difluoro-1, 3-diphenyl-1, 3-propanedione, 1-phenyl-3-isoheptyl-1, 3-propanedione and benzoyl trifluoroacetone. The synergistic extraction agent is prepared from one or more of tributyl phosphate, triisobutyl phosphate, triamyl phosphate, tributyl phosphine oxide and bis (4-fluorophenyl) phosphine oxide; the diluent comprises one or more of kerosene, sulfonated kerosene, tetradecane and tetradecanol. The composite extraction agent adopted by the invention has low requirement on pH, better acid and alkali resistance stability, small solution loss and good selective effect on lithium, the lithium recovery cost is reduced, and the comprehensive lithium extraction efficiency can reach 97.0% or above.

The invention discloses issatchenkia orientalis and application thereof. Relates to the technical field of fermentation. The invention provides a specific strain and application thereof in reconstituted tobacco. According to the tobacco leaf extracting solution fermented by the bacterial strain, the content of esters such as 2, 2, 4-trimethylpentanediol isobutyl ester, 2, 2, 4-trimethyl-1, 3-pentanediol monoisobutyrate, tributyl phosphate and methyl palmitate is remarkably increased, eight novel ester substances with the characteristic aroma such as fruit aroma and rosin are newly generated, and the tobacco leaf extracting solution has the advantages that the content of the esters such as the 2, 2, 4-trimethylpentanediol isobutyl ester, the 2, 2, 4-trimethyl-1, 3-pentanediol monoisobutyrate, the tributyl phosphate and the methyl palmitate is increased; and the whole fragrance style is obviously enhanced. It is shown that the aroma-producing issatchenkia orientalis IO-1 fermented tobacco leaf extracting solution has good aroma-producing capacity, and through the combined effect of enzymolysis and fermentation, the extracting solution is expected to play an important application value in the field of reconstituted tobacco leaf raw material quality improvement.

The invention provides a method for efficiently recovering metal iridium from waste iridium and waste materials, and belongs to the technical field of precious metal recovery. Comprising the following steps: (1) stripping a titanium substrate by adopting high-pressure water jet or ultrasonic vibration; (2) adding the titanium substrate obtained by stripping into mixed acid, carrying out gradient heating for dissolving, filtering, and reserving filtrate for later use; (3) adding a tributyl phosphate / kerosene system into the filtrate, extracting and separating the tributyl phosphate / kerosene system, and adding diluted hydrochloric acid for back extraction and separation to obtain an iridium extract; and (4) adding a purifying agent into the iridium extraction liquid, carrying out ultrasonic purification, separating the purifying agent, adding solid ammonium chloride into the filtrate, precipitating, filtering, washing the solid with an ammonium chloride solution, drying, and calcining to obtain an iridium oxide product. The method comprises the following steps: preferentially extracting iridium from a medium by adopting tributyl phosphate (the partition ratio is gt; 100), a purifying agent is added into the solution, and impurities such as Fe, Al and Cu ions are deeply removed.

A preparation method and application of a flexible iron carbonyl inverted pyramid metamaterial thin film, which relate to the preparation method and application of electromagnetic absorption metamaterials. It is intended to solve the technical problems of the existing metamaterials having fixed functions after processing and narrow absorption frequency bands at a fixed thin thickness. The method includes: adding iron carbonyl powder, dibutyl phthalate, and tributyl phosphate into a PVB binder to prepare a slurry; then casting and drying the slurry on a glass substrate to obtain a cast film; laminating the cast films and engraving periodic units, and then laminating and assembling the periodic units into an inverted pyramid structure to obtain a metamaterial thin film. A film of about 2 mm is directly attached to a metal plate to form an electromagnetic absorption flat component, and its absorption bandwidth covers about 12.4 GHz - 18.5 GHz; the film is bent and covered on the metal plate with an air layer of adjustable thickness, realizing dual-frequency absorption at about 6.8 GHz and 14.5 GHz. This multifunctional thin film can be used in the field of wave absorption.

The invention discloses an extraction system and an extraction method capable of efficiently extracting lithium from a lithium-containing solution, dibenzoylmethane and tributyl phosphate are creatively compounded to serve as main extraction functional components, on one hand, the lithium extraction efficiency can be remarkably improved, the dosage of a composite extraction agent is greatly reduced, and corrosion of the extraction agent to extraction equipment is reduced; on the other hand, the organic phase after reverse extraction does not need to be regenerated and can be directly recycled, the extraction process is greatly shortened, and consumption of excessive acid and alkali and loss of the extraction agent are avoided; and on the other hand, the extraction system is low in cost and wide in applicability, lithium ions in lithium-containing solutions with different lithium ion concentrations and different sources can be extracted, the lithium extraction rate is high, the selectivity is good, and interference of hetero-ions can be well shielded.

The invention relates to a leak detection glue solution for a vacuum forming mold and a leak point detection method. The leak detection glue solution comprises the following components in parts by mass: 100 parts of water, 4.5-5.5 parts of polyvinyl alcohol, 30-40 parts of an ethanol water solution, 2-8 parts of glycerol, 0.1-0.2 part of tributyl phosphate and 1-2 parts of water-based color paste. According to the leakage point detection method, the surface of a mold is sealed by adopting a vacuum bag film and the like and then is guided, a leakage detection glue solution flows on the surface of the mold at a proper flow speed and leakage detection is carried out, the mold is converted from airtightness detection to liquid airtightness detection, and when a leakage point exists, continuous bubbles can be visually seen from the leakage point, and the leakage point can be rapidly judged; and meanwhile, through operation modes of step-by-step feeding and discharging, reverse feeding and discharging and the like, interference of a certain leakage point on subsequent leakage point detection can be avoided. The leak detection glue solution is moderate in viscosity, can well guide flow during vacuum flow guide, cannot cause difficulty in observation due to too fast flow guide, can be suitable for vacuum flow guide leak detection, can quickly form a glue film when exposed in air, can be directly torn off, and is high in operation efficiency.

The application provides a method for preparing lithium iron phosphate by using waste lithium isooctanoate catalyst, and comprises the following steps: grinding and sieving the waste lithium isooctanoate catalyst to obtain lithium isooctanoate powder; mixing the lithium isooctanoate powder with water, adding concentrated hydrochloric acid to perform leaching reaction to obtain leaching slurry; filtering the leaching slurry to obtain filtrate and residue; adding activated carbon to the filtrate to perform adsorption and filtration, then adding HCl and FeCl3·6H2O to stir, and controlling the pH of the solution to be 1.0-1.5 to obtain an aqueous phase; uniformly mixing tributyl phosphate and sulfonated kerosene to obtain an organic phase; mixing, oscillating, standing and separating the aqueous phase and the organic phase to obtain an extraction phase and a raffinate phase; washing the extraction phase by using dilute hydrochloric acid to remove impurities, adjusting the molar ratio of P, Fe and Li in the extraction phase after impurity removal, adding a carbon source to obtain mixed slurry; performing spray drying on the mixed slurry, and performing high-temperature sintering, crushing and screening on the powder obtained by spray drying to remove iron, so as to obtain lithium iron phosphate. The application scheme realizes resource recycling and utilization, and the prepared product has high quality and low cost.

The present invention discloses a uniform and stable silicon-free defoamer for evaporators. The defoamer comprises the following ingredients by weight: 20-23% propylene glycol block polyether L61, 42-46% propylene glycol block polyether L62, 20-23% octadecyl alcohol, 3-5% tributyl phosphate, 1-3% Tween 80, 0.8-1.2% stearic acid, and 2-4% tert-butylbenzoic acid. The silicon-free defoamer has the advantages of high temperature resistance, excellent defoaming and anti-foaming properties, a simple preparation method, a wide range of raw material sources, and low cost.

This invention relates to the field of electroosmotic reinforcement technology, and particularly to an anti-corrosion coating for electroosmotic reinforcement electrodes, its preparation method, the electrode, and a method for electroosmotic reinforcement of soft soil. An embodiment of this invention discloses an anti-corrosion coating for electroosmotic reinforcement electrodes. The raw materials, calculated by weight, include: 32-40 parts of organosilicon epoxy resin, 2-4 parts of carbon black, 4-8 parts of graphite, 1-2 parts of carbon fiber filament, 2-4 parts of iron(III) oxide, 0.5-1 part of silver powder, 1-2 parts of organobentonite, 0.5-1.5 parts of talc, 15-20 parts of methyl isobutyl ketone, 8-12 parts of xylene, 3-5 parts of polyvinyl alcohol, 3-8 parts of tributyl phosphate, 0.5-1 part of polysiloxane, 0.5-1 part of polyethylene glycol, 1-5 parts of butyl butyrate, and 1-5 parts of polyaniline. The anti-corrosion coating used in this invention, when applied to the electrode for electroosmotic reinforcement, exhibits excellent conductivity and anti-corrosion properties, as well as good sealing performance and resistance to cracking.

The invention relates to a process for extracting low-concentration phenol from an aqueous solution by using a hydrophobic eutectic solvent. The extraction agent used in the process is mainly synthesized from tributyl phosphate and n-caprylic alcohol in a molar ratio of 0.5: 1: 2 under the condition of 353.15 K. A phenol aqueous solution is used as an extraction water phase, the influence of various experimental parameters such as pH, temperature and phase ratio on the phenol extraction efficiency is researched by changing the content of phenol in the extraction water phase, and the extraction organic phase and the water phase are fully mixed according to the volume ratio of 1: 0.2-1: 5 and then separated until a clear phase interface appears, so that the two phases are completely separated. After phase separation is finished, an organic phase rich in phenol and a water phase containing a very small amount of phenol are obtained, and the highest extraction efficiency reaches 99% or above. Through three times of back extraction experiments, the back extraction efficiency of the phenol reaches 98% or above, and cyclic utilization of the phenol is achieved in the economic aspect. The method for extracting phenol has the advantages of low energy consumption, simple process, high separation efficiency of phenol and water and the like, the adopted hydrophobic eutectic solvent is low in price, and the preparation method is simple, non-toxic and environment-friendly.

The invention discloses an Apiotrichum loubieri gene and an application of the Apiotrichum loubieri gene. Relates to the technical field of fermentation. The invention provides a specific strain and application thereof in reconstituted tobacco. According to the tobacco leaf extracting solution fermented by the bacterial strain, the content of esters such as 2, 2, 4-trimethyl-1, 3-pentanediol monoisobutyrate, dimethyl phthalate, tributyl phosphate, dihydroactinidiolide and methyl palmitate is remarkably increased, and the content of the esters such as 2, 2, 4-trimethyl-1, 3-pentanediol monoisobutyrate, dimethyl phthalate, tributyl phosphate, dihydroactinidiolide and methyl palmitate is remarkably increased; nine novel ester substances with aromatic smell, fruit fragrance, flower fragrance and other characteristic aromas are newly generated, and four phenolic aroma components are newly added. And the whole fragrance style is obviously enhanced. It is shown that the aroma-producing Apiotrichum loubieri AL-4 fermented tobacco enzyme extracting solution has good aroma-producing capacity, and through the combined effect of enzymolysis and fermentation, the aroma-producing Apiotrichum loubieri AL-4 fermented tobacco enzyme extracting solution is expected to play an important application value in the field of reconstituted tobacco raw material quality improvement.

The invention discloses a synthesis method of a super nano conductive agent, which comprises the following steps: preparing a rod-like lithium iron phosphate precursor with a nano size, dispersing tributyl phosphate in an organic solution, dispersing the prepared rod-like lithium iron phosphate precursor in a tributyl phosphate solution to obtain a lithium iron phosphate precursor dispersion liquid, and drying the lithium iron phosphate precursor dispersion liquid to obtain the super nano conductive agent. Mixing the lithium iron phosphate precursor dispersion liquid in a carbon source solution to prepare suspension slurry, and performing high-speed spray drying and granulation on the suspension slurry to obtain particle powder; the lithium iron phosphate precursor coated with the tributyl phosphate is in contact with the carbon source, a phosphate group of the tributyl phosphate reacts with a hydroxyl group on the carbon surface to form a carbon-oxygen-phosphorus covalent bond, so that the binding force between the lithium iron phosphate surface and carbon is enhanced, and the lithium iron phosphate surface and the carbon are more stable through certain directivity and saturability of the covalent bond. The bonding thickness is limited, the low resistivity is ensured, and the transmission efficiency of ions and electrons is improved.

The present invention relates to the technical field of dull oil, and discloses a wear-resistant and explosion-proof waterborne modified polyurethane dull oil and a preparation method thereof. In the present invention, γ-glycidoxypropyltrimethoxysilane is successively reacted with silicon dioxide and tributyl phosphate to obtain a silicon-phosphorus-containing polyol, and then it is reacted with toluene-2,4-diisocyanate under the catalytic reaction of dibutyltin dilaurate to obtain a silicon-phosphorus-containing terminal isocyanate prepolymer. First, polycaprolactone, dimethylolpropionic acid, etc. are reacted with the silicon-phosphorus-containing terminal isocyanate prepolymer to obtain a polyurethane oligomer, and then it is reacted with polyaspartate to obtain a waterborne polyurethane polyurea emulsion. Finally, a defoaming agent, a diluent, etc. are added to a linear waterborne polyurethane emulsion and the waterborne polyurethane polyurea emulsion, and stirred and dispersed to obtain a polyurethane dull oil. The polyurethane dull oil prepared by the present invention has excellent wear resistance, explosion resistance and flame retardancy.

The present invention relates to the technical field of inks, and discloses a functional ink for glass covers and a preparation method thereof. The ink comprises the following raw materials: styrene, butyl acrylate, methyl methacrylate, methacrylic acid; BEM, deionized water, initiator, emulsifier, chain transfer agent, inorganic modified additive, pigment, tributyl phosphate, polyethylene glycol; wherein the inorganic modified additive is obtained by modifying a rosin-based polymeric substance on the surface of nano-zinc oxide. Zinc oxide has good light transmittance. By using the chemical grafting method, the light transmittance of the ink is increased. In addition, the unsaturated alkenyl functional group can crosslink with the substrate, enabling the prepared ink to have high adhesion. Moreover, the contained ether bonds and rosin structure can further improve the adhesion between the ink and the glass cover, enhancing the competitiveness of the product.

According to the technical scheme, the method is characterized by comprising the following steps: S1, pretreatment of the extraction liquid: mixing saline water containing target solute magnesium sulfate with a tributyl phosphate extraction agent according to a volume ratio of 1: (0.8-1.2), and stirring and extracting at 35-45 DEG C for 20-30 minutes to form the extraction liquid; 0.5 wt%-1.2 wt% of a dielectric conditioning agent is added into the extraction agent; s2, gradient cooling crystallization: adopting a three-stage cooling process; s3, solid-liquid separation and solvent recovery; crystal growth lasts for 20-30 minutes; and S4, intelligent temperature control feedback. Compared with a traditional evaporation method, the technology has the advantages that the concentration period is shortened by 30-40%, and the unit energy consumption is reduced by 25-30. By utilizing the process, the purity can be improved: the purity of a target solute is improved from 96.5% in the prior art to 99.2% or above, and the impurity content is reduced by 60% or above. Crystal growth lasts for 20-30 minutes; economic optimization can be realized by utilizing the process.

The application discloses a high-performance bismuth-free ZnO-Cr2O3-based pressure-sensitive ceramic and a preparation method and application of defect regulation, and belongs to the technical field of pressure-sensitive materials. The method comprises the following steps: ZnO, doped oxides, polyvinyl alcohol aqueous solution, tributyl phosphate and deionized water are ball-mixed to obtain mixed powder; after drying, sieving, granulating and compression molding, oxide-doped ZnO green bodies are obtained; after glue removal and sintering, high-performance bismuth-free ZnO-Cr2O3-based pressure-sensitive ceramic is obtained. The bismuth-free ZnO-Cr2O3-based pressure-sensitive ceramic is obtained by adopting a solid-phase sintering method, taking ZnO as main raw material, and doping multiple oxides for compression and sintering. Immovable acceptor defects and stable double Schottky barrier structures are formed in the oxides enriched at the ZnO grain boundaries, which provides an important technical thought for the electrical performance optimization of different system pressure-sensitive ceramics. The high-performance bismuth-free ZnO-Cr2O3-based pressure-sensitive ceramic has high nonlinearity coefficient and breakdown field strength and small leakage current density, and has a wide application prospect in miniaturized electronic circuit systems.

The invention discloses a method for extracting technetium from PUREX process waste liquid. The method comprises the working procedures of material blending, extraction, washing, reduction reverse extraction and reverse extraction. According to the technetium extraction and purification process, the technetium is separated from elements such as zirconium, niobium, ruthenium, uranium, neptunium and plutonium by using the technetium as a raw material, tributyl phosphate (TBP) as an extracting agent and hydrogenated kerosene (OK) as a diluent, meanwhile, the economy and safety of the reagents adopted by the process are verified by engineering, and the operation process of each procedure also meets the requirements of high flux, continuous treatment and remote operation.

This application discloses a method for extracting fluorine from a nickel-cobalt-manganese sulfate solution, relating to the field of wastewater treatment. The method comprises the following steps: mixing the nickel-cobalt-manganese sulfate solution with concentrated sulfuric acid for activation, subjecting the activated solution to multi-stage countercurrent extraction using an organic phase comprising tributyl phosphate, isooctyl alcohol, and a diluent, subjecting the fluorine-containing organic phase to multi-stage countercurrent washing, and subjecting the washed fluorine-containing organic phase to multi-stage countercurrent stripping. This application, directed to the extraction of fluorine from a nickel-cobalt-manganese sulfate solution, employs tributyl phosphate as an extractant, while isooctyl alcohol is added in a mixing and settling tank to improve phase separation. The process is simple, and the extraction rate is as high as over 90%.

This invention relates to a method for extracting technetium from nuclear fuel reprocessing waste using an extraction method, comprising the following steps: preparing a technetium-zirconium co-extraction feed; co-extracting technetium and zirconium using a TBP-kerosene organic solution as the extractant; reducing and back-extracting the technetium in the TBP organic phase co-extraction solution using a reducing stripping agent; and back-extracting the zirconium in the remaining TBP organic phase using a complexing stripping agent. This method improves upon existing techniques for extracting technetium from nuclear fuel reprocessing waste using extraction methods, which generate a significant amount of organic phase radioactive waste other than tributyl phosphate and require an additional solvent treatment system. It avoids introducing additional solvents and metal ion groups into the reprocessing system and is better compatible with the main process flow and facilities of reprocessing plants using the PUREX process, thus making the technetium extraction process easier to implement in reprocessing plants. The method provided by this invention prevents technetium from entering vitrification and geological disposal, thus preventing long-term hazards to the biosphere.

The invention belongs to the technical field of precious metal extraction, and particularly relates to a synergistic extraction separation method for gold in a high-concentration gold-containing solution, diethylene glycol dibutyl ether, tributyl phosphate and sulfonated kerosene are mixed to obtain a synergistic extraction agent, and the synergistic extraction agent is used for extracting a gold-containing chlorination leaching solution to obtain a gold-containing extraction phase; in the synergistic extractant, the molar ratio of diethylene glycol dibutyl ether to tributyl phosphate is (5-35): 1; in the synergistic extraction agent, the concentration of diethylene glycol dibutyl ether is 0.5 to 3.5 mol / L; according to the method provided by the invention, the extraction agent is selected, and the extraction process parameters such as the ratio of the extraction agent, the ratio of an organic phase to water, the extraction temperature and the extraction stage number are adjusted, so that a good extraction and separation effect on gold can be obtained, and efficient separation of gold in the high-concentration gold-containing solution is realized. The method is good in synergistic effect, good in gold and impurity separation effect and high in efficiency.

Provided is a method for efficiently removing butanol, dibutyl phosphate, and the like, which are impurities contained in tributyl phosphate. The disclosed technology is a method for producing tributyl phosphate, which is characterized by comprising a step in which crude tributyl phosphate is brought into contact with an aluminosilicate compound in which the molar ratio (SiO2 / Al203) of silica and alumina in the zeolite skeleton is 10 or more. Furthermore, disclosed is a method for producing an extractant containing tributyl phosphate and a hydrocarbon having 6 or more carbon atoms as a diluent, the method comprising bringing the tributyl phosphate into contact with an aluminosilicate compound having a molar ratio of silica to alumina of a zeolite skeleton of 10 or more, removing impurities contained in the components, and separating the tributyl phosphate from the aluminosilicate compound. And mixing with the diluent.

The invention belongs to the technical field of wastewater treatment, and particularly relates to a high-phenol high-salt industrial wastewater treatment process which comprises the following steps: S1, preparing a composite extracting agent, S2, extracting phenol, S3, regenerating the extracting agent, S4, pretreating a dephenolized water phase, and S5, evaporating and desalting. Compared with the prior art, the invention has the following beneficial effects: through compounding of tributyl phosphate and kerosene, the addition of kerosene can enhance hydrophobicity by reducing viscosity, dispersing tributyl phosphate molecules and retaining tributyl phosphate at the same time, the extraction efficiency of phenol is greatly improved, the extraction efficiency is high, the maximum extraction rate of phenol is high, and the method is suitable for industrial production. The phenol extraction rate can reach 95.5% after extraction is carried out for 1.5 hours, and the maximum phenol extraction rate is stabilized at 97.2% after extraction is carried out for 2 hours.