30 results about "White Phosphorus" patented technology

The invention discloses a preparation method of a three-dimensional porous white phosphorus calcium stone ceramic bracket with piezoelectric biological activity, and belongs to the field of brackets. The preparation method of the scaffold comprises the following steps: uniformly dipping a polymer foam template with a certain pore size and porosity in slurry composed of beta-tricalcium phosphate and a binder, carrying out high-temperature sintering to remove organic matters, carrying out a hydrothermal reaction on the inorganic scaffold in an aqueous solution containing magnesium ions, converting beta-tricalcium phosphate into white calcomanite, and carrying out drying to obtain the scaffold. And then carrying out high-temperature annealing treatment to obtain the white calcomanite porous ceramic bracket with piezoelectric biological activity. The prepared ceramic scaffold is controllable in composition and degradation rate, excellent in mechanical property, electroactive, free of cytotoxicity and remarkable in osteogenesis induction effect, and the porosity and aperture of the scaffold are suitable for cells to enter and grow. The preparation method of the white phosphorite three-dimensional piezoelectric ceramic bracket is simple and easy to implement, controllable in process and easy to amplify.

The invention discloses a low-energy-consumption electrosynthesis method of phosphotriester compounds, and belongs to the technical field of electrolysis processes for producing compounds. In the electrolysis process, the catalyst loses electrons on the surface of the anode, an oxidation-state catalyst with oxidability is formed, and then the oxidation-state catalyst flows into the reaction device along with oxidation-state catalytic liquid. The oxidation-state catalyst reacts with white phosphorus to oxidize the white phosphorus and reduce the white phosphorus into a normal-state catalyst, and the oxidation-state white phosphorus has good reactivity and can further react with a monohydric hydroxyl compound to form a target phosphotriester compound. According to the method, the catalytic liquid is used as a medium participating in circular reaction, the synthesis route overcomes production interruption caused by reaction and product separation of white phosphorus and the unitary hydroxyl compound in an electrolytic tank under the action of current in an existing electrolytic synthesis system, and the method has the advantages of being simple, efficient, green, environmentally friendly and capable of achieving full-continuous flow production; the method is suitable for industrial production and has a good application prospect.

The present invention discloses an electrochemical preparation method of tris(1,1,1,3,3,3-hexafluoro-2-propyl) phosphite, belonging to the technical field of electrolysis processes for producing compounds. The present invention includes the following steps: white phosphorus, hexafluoroisopropanol are mixed with an activating additive, an organic base, an electrolyte, and an organic solvent to form an electrolytic reaction solution; the electrolytic reaction solution is electrolyzed under the action of direct current, white phosphorus is oxidized at the anode and then nucleophilically attacked by hexafluoroisopropanol to generate tris(1,1,1,3,3,3-hexafluoro-2-propyl) phosphite, and hydrogen atoms are reduced at the cathode to form hydrogen gas. The present invention has the advantages of being simple and fast, having high safety, few by-products with high utilization value, and low cost; this method has a high atomic utilization rate, weak corrosiveness to the device, meets the requirements of green and safe production, and has good industrial application prospects.

The invention discloses a method for harmless treatment of waste white phosphorus and recovery of copper, and belongs to the technical field of harmless treatment of hazardous waste, white phosphorus is dissolved in carbon disulfide, the carbon disulfide is slowly and dropwise added into a copper sulfate aqueous solution at the speed of 0.1-0.3 kg / min and reacts with the copper sulfate aqueous solution to generate copper and cuprous phosphide, and the cuprous phosphide is recycled. According to the method, the white phosphorus is dissolved in the carbon disulfide, the specific surface area of the white phosphorus is increased, the white phosphorus can be in full contact with the copper sulfate solution at the normal temperature to react to generate copper and cuprous phosphide, and the cuprous phosphide can be recycled after the reaction is finished. The method is simple, easy to operate and capable of saving chemicals, copper in copper sulfate is recycled while waste white phosphorus is subjected to innocent treatment, resources are reasonably utilized, cost is saved, safety and high efficiency are achieved, and good economic benefits are achieved.

The invention is suitable for the technical field of biology, and provides a nanoparticle / high-molecular polymer composite scaffold with good dispersibility and antioxidant activity, and a preparation method and application thereof. The method comprises the following steps: adding an aqueous solution of calcium chloride, magnesium chloride, manganese chloride and sodium phosphate into a mixed solution of oleic acid and absolute ethyl alcohol, forming oleic acid-coated manganese-substituted pandermite nanoparticles by virtue of a hydrothermal method, and forming the composite scaffold by virtue of high interfacial compatibility of oleic acid and a high-molecular polymer. According to the invention, manganese coated with oleic acid is used for replacing white calcomanite nanoparticles to exert anti-oxidation and osteogenic biological effects in an oxidative stress bone defect microenvironment, and uniform dispersion of the nanoparticles in a high-molecular polymer is realized through the constructed nanoparticle / high-molecular polymer composite scaffold. The two strategies cooperatively regulate and control repair of the oxidative stress bone defect area, and the problems that nanoparticles aggregate, the mechanical performance is reduced, the cell interaction is limited, and the oxidative stress state cannot be relieved are solved.

The invention discloses a low-energy-consumption electrosynthesis method of phosphotriester compounds, and belongs to the technical field of electrolysis processes for producing compounds. In the electrolysis process, the catalyst loses electrons on the surface of the anode, an oxidation-state catalyst with oxidability is formed, and then the oxidation-state catalyst flows into the reaction device along with oxidation-state catalytic liquid. The oxidation-state catalyst reacts with white phosphorus to oxidize the white phosphorus and reduce the white phosphorus into a normal-state catalyst, and the oxidation-state white phosphorus has good reactivity and can further react with a monohydric hydroxyl compound to form a target phosphotriester compound. According to the method, the catalytic liquid is used as a medium participating in circular reaction, the synthesis route overcomes production interruption caused by reaction and product separation of white phosphorus and the unitary hydroxyl compound in an electrolytic tank under the action of current in an existing electrolytic synthesis system, and the method has the advantages of being simple, efficient, green, environmentally friendly and capable of achieving full-continuous flow production; the method is suitable for industrial production and has a good application prospect.

The application discloses a method for producing phosphorus pentafluoride by electrolysis. The method is to use white phosphorus and anhydrous hydrogen fluoride as raw materials, fluorometal salt or quaternary ammonium fluoride salt as conductive agent, and to carry out electrolysis reaction in a high-nickel anode electrolysis container to produce phosphorus pentafluoride. The preparation method can produce high-purity phosphorus pentafluoride in one step, and the impurities are few when used for synthesizing lithium hexafluorophosphate, and no additional hydrogen chloride gas is produced, the post-processing cost is lower, and the production process is safer and more efficient. In addition, the electrolysis reaction condition is mild, the by-product waste is less, the environmental pollution is small, and the phosphorus pentafluoride gas with a purity greater than 99.99% can be obtained.

The invention provides a triazaaryl phosphine-sulfur compound and a preparation method thereof.The triazaaryl phosphine-sulfur compound shown in the formula (I) is an organic phosphine compound of a triazaaryl phosphine-sulfur structure directly synthesized through white phosphorus, and the process avoids the problems that chlorine with great pollution is used in traditional phosphorus chemical industry production and subsequent emission is caused; and the method is a more environment-friendly production method. In addition, the method disclosed by the invention is simple in step, mild in reaction condition and simple in post-treatment, and the yield of medium or above can be obtained.

The invention discloses an electrochemical preparation method of tris (1, 1, 1, 3, 3, 3-hexafluoro-2-propyl) phosphite, and belongs to the technical field of electrolysis processes for producing compounds. The method comprises the following steps: mixing white phosphorus, hexafluoroisopropanol, an activation additive, an organic alkali, an electrolyte and an organic solvent to form an electrolytic reaction solution; the electrolytic reaction solution is electrolyzed under the action of direct current, white phosphorus is oxidized at an anode and then subjected to nucleophilic attack by hexafluoroisopropanol to generate tri (1, 1, 1, 3, 3, 3-hexafluoro-2-propyl) phosphite, and hydrogen atoms are reduced at a cathode to form hydrogen. The method has the advantages of simplicity, convenience, rapidness, high safety, few byproducts, high utilization value and low cost; the method is high in atom utilization rate and weak in corrosion to devices, meets the requirements of green and safe production, and has a good industrial application prospect.

The invention discloses a method for electrochemical synthesis of an organophosphorus pesticide, and belongs to the technical field of electrolysis processes for producing compounds. The method comprises the following steps: mixing white phosphorus with an alcohol compound, a sulfhydryl compound, an additive, an electrolyte and an organic solvent in an inert atmosphere to form an electrolytic reaction solution; and electrolyzing the electrolytic reaction solution under direct current, and collecting to obtain the organophosphorus pesticide. The method has the advantages of low cost and strong reaction selectivity, and overcomes the technical problem of low yield of a target product caused by a competitive reaction of sulfydryl and hydroxyl; the method is high in atom utilization rate, small in pollution and weak in corrosion to devices, meets the requirements of green and safe production, and has a good industrial application prospect.

The present invention relates to a method for preparing a two-dimensional white phosphorus film, an application and a device. The method for preparing a two-dimensional white phosphorus film comprises the following steps: preparing a silicon substrate using a silicon wafer; degassing a cadmium source under vacuum conditions, and then heating to evaporate cadmium atoms to the surface of the silicon substrate, and epitaxially growing cadmium atoms to obtain a cadmium substrate; degassing black phosphorus under vacuum conditions, and then heating to a first temperature to obtain P 4 molecular beam, and then evaporate it to the surface of the cadmium substrate at the second temperature to obtain a P 4 A single-layer two-dimensional white phosphorus film composed of parallel arrangement of molecular dimers. The present invention also provides a single-layer two-dimensional white phosphorus film prepared by the preparation method. The present invention also provides an application of the single-layer two-dimensional white phosphorus film prepared by the preparation method, and the application of the two-dimensional white phosphorus film as nano ink. The present invention also provides a device for preparing the two-dimensional white phosphorus film as described in the present invention. The present invention prepares a two-dimensional white phosphorus film with specific structure and performance.

The invention discloses a phosphorus recovery system and method for MBE equipment. The phosphorus recovery system comprises a phosphorus recovery cavity, a cooling adsorption unit and a heating conversion unit, one end of the phosphorus recovery cavity is connected to the MBE cavity through a pipeline with a first control valve, and the other end of the phosphorus recovery cavity is connected to the vacuum pump through a pipeline with a second control valve, so that phosphorus-containing gas in the MBE cavity enters the phosphorus recovery cavity; the cooling adsorption unit is arranged at the upper part of the inner side of the phosphorus recovery cavity and is used for cooling and adsorbing phosphorus-containing gas in the phosphorus recovery cavity; the heating conversion unit is arranged at the bottom of the phosphorus recovery cavity and used for converting white phosphorus adsorbed and collected by the cooling adsorption unit into red phosphorus. The device has the advantages of being compact in structure, convenient to operate, high in reliability and the like, the risk of phosphorus spontaneous combustion is greatly reduced, safety accidents are avoided, the whole phosphorus recovery system does not need to be disassembled and assembled independently for professional treatment, normal epitaxial growth of the MBE system is not affected, and manpower and material resources are relatively saved.

This invention discloses a method for removing white phosphorus from soil. First, contaminated soil is mixed evenly with water, stirred, and then nitric acid solution is added. After stirring, a phosphorus removal agent is added, and stirring continues. The mixture is then filtered, freeze-dried, and the phosphorus removal agent is removed using a magnetic sieve to obtain treated soil. The phosphorus removal agent contains nano-ferric oxide, allowing it to separate from the soil via magnetic attraction after treating the white phosphorus, reducing the difficulty of separation and enabling reuse. The soil is treated with nitric acid, causing the white phosphorus to react with the nitric acid to produce phosphate ions. The addition of the phosphorus removal agent releases lanthanum carbonate from the surface. Lanthanum has strong Lewis acidity and can form strong ligands with phosphate, which has Lewis basicity, to adsorb phosphate ions from the soil, thus forming a complex. Simultaneously, the free amino groups on the chitosan surface can adsorb metals, further completing the adsorption of the complex.

The invention provides a preparation method of a cyclic phosphoric acid compound as shown in a formula (III) or (IV) and a derivative thereof, which is an organic cyclic phosphoric acid compound and a derivative thereof directly synthesized by using white phosphorus, and the process method avoids the problems of use of chlorine with great pollution and subsequent emission in the traditional phosphorus chemical production. And the method is a more environment-friendly production method. In addition, the method disclosed by the invention is mild in reaction condition, relatively short in reaction time and simple in post-treatment, and relatively high yield can be obtained. # imgabs0 #

This invention relates to the field of etching technology, and in particular to an etching solution and etching method. The etching solution of this invention comprises, by mass percentage: 5wt%–18wt% nitric acid, 2wt%–6wt% glacial acetic acid, 2wt%–5wt% white phosphorus, and 2wt%–8wt% iron oxide. The etching solution of this invention exhibits excellent etching ability and stability, improves the etching morphology, and reduces etching film thickness deviation. Using the etching solution of this invention to etch steel plates to obtain pad printing steel plates improves the flatness, smoothness, brightness, and gloss of the surface of the concave-plate printing images, ensures the matching degree of film thickness for large and small images, thereby increasing the service life of the pad printing and saving pad printing costs.

Provided is a method for preparing a cyclic phosphate compound represented by formula (III) or formula (IV) and a derivative thereof. The method includes: step 1), adding a compound of formula (I), a compound of formula (II), and a solvent to a reactor, and then adding white phosphorus and a first base in sequence, followed by heating while stirring to obtain a mixed solution of reactants; and step 2), adding a second base to the mixed solution of reactants, and subjecting a resulting mixture to heating and reaction; at end of the reaction, stopping the heating and then cooling a resulting reaction product to room temperature; and adding an acid to the reactor and conducting acidification to obtain a compound of formula (III) or a compound of formula (IV).

The invention discloses a high-temperature oxidation-reduction monazite smelting integrated comprehensive recovery technology, which comprises the following steps: pressing monazite and carbon powder with proper particle size into balls, performing three-section temperature control reduction, namely an inert atmosphere preheating section, an oxygen-enriched atmosphere high-temperature main reduction section and an oxygen-enriched air oxidation section, and washing tail gas to prepare phosphoric acid for recovery. And after ball crushing and acid dissolution, respectively treating filter residues, removing iron from the solution, extracting uranium, precipitating thorium and concentrating according to the temperature of a high-temperature main reduction section in an oxygen-enriched atmosphere. The recovery rate of rare earth elements such as yttrium and radioactive element uranium in the technology is high, the potential safety hazard problem of white phosphorus is solved, waste liquid is little, and radioactive waste residues are greatly reduced.

The application provides a phospholane metal salt compound shown in formula (III) and a preparation method thereof. The phospholane metal salt compound is an organic phosphorus compound based on a phospholane structural unit, which is directly synthesized by using white phosphorus. The process method avoids the use of highly-polluting chlorine gas and subsequent emission problems in traditional phosphorus chemical production, and is a more environmentally-friendly production method. In addition, the method disclosed by the application has the advantages of mild reaction conditions, short reaction time, simple post-treatment and high yield.

The invention relates to a production method of high-purity red phosphorus, which comprises the following steps: placing high-purity white phosphorus in an inner-layer high-purity quartz tube, inserting the inner-layer high-purity quartz tube into an outer-layer high-purity quartz tube after the high-purity white phosphorus is cooled and solidified, installing a stainless steel tube joint at an opening of the outer-layer high-purity quartz tube, inserting the closed outer-layer high-purity quartz tube into an infrared electric heater, and heating the outer-layer high-purity quartz tube to obtain the high-purity red phosphorus. After the infrared electric heater is plugged into the stainless steel sealed pressure container, a sealing head is mounted; the stainless steel sealed pressure container is sealed; preheating and liquefying the high-purity white phosphorus in a nitrogen protection normal pressure state until the moisture of the high-purity white phosphorus is completely evaporated; pressurizing the outer layer high-purity quartz tube, maintaining the balance of the internal pressure and the external pressure, and heating to 350-380 DEG C; and when the temperature is reduced to be within 250 DEG C, forced cooling and discharging are carried out on the stainless steel sealed pressure container. According to the invention, the nested inner-layer high-purity quartz tube and outer-layer high-purity quartz tube are adopted, discharging is carried out in the inner-layer high-purity quartz tube, red phosphorus is convenient to take out, nitrogen is filled inside and outside the outer-layer high-purity quartz tube, pressure balance inside and outside the outer-layer high-purity quartz tube is maintained, and safety is ensured.

The invention relates to the technical field of battery negative electrode materials, in particular to a phosphorus-carbon negative electrode material production device and a preparation method, and the preparation method comprises the following operation steps: placing activated carbon in a closed container, and then carrying out vacuum heat treatment on the closed container; injecting molten white phosphorus into the closed container in proportion, and mechanically stirring and uniformly mixing; heating the closed container and continuously stirring; the temperature in the closed container is adjusted to the conversion temperature, and heat preservation is conducted; cooling the closed container, injecting alkali liquor into the closed container after cooling, heating for alkali washing, discharging waste gas generated during alkali washing out of the closed container, and further treating the waste gas; and washing, drying and packaging. By adopting the specific device, the problem that white phosphorus and activated carbon are difficult to compound is solved, the phosphorus-carbon negative electrode material is prepared by taking cheap white phosphorus as a phosphorus source, the production cost of the phosphorus-carbon negative electrode material is remarkably reduced, and the preparation method is safe, efficient and easy to operate and does not influence the deposition efficiency of phosphorus.

The present invention relates to a nano red phosphorus-porous carbon composite material and its preparation method and application. The preparation method comprises: mixing a pore-forming agent, a solvent, an ethylenediamine solution and red phosphorus to obtain a first mixed solution, then mixing chlorella with the first mixed solution and adding a first acidic solution, and obtaining a first product through separation, wherein the solvent is selected from water and / or a hydrophilic solvent; carbonizing the first product under protective gas conditions to obtain a second product; mixing the second product with a second acidic solution and adding a second mixed solution, wherein the second mixed solution is a mixed solution of an ethylenediamine solution and red phosphorus, and obtaining a nano red phosphorus-porous carbon composite material through separation. The preparation method of the present invention improves the deposition amount and dispersion uniformity of nano red phosphorus particles, significantly reduces the problem of red phosphorus being converted into white phosphorus during the preparation process, improves production efficiency and safety, and also reduces costs, which is conducive to large-scale production.

The invention discloses a white phosphorus production device based on phosphorus sludge recovery, and relates to the technical field of white phosphorus production.The white phosphorus production device comprises a machine shell, a combustion chamber, a treatment chamber, a stirring mechanism and an adjusting mechanism, the combustion chamber is fixedly connected with the machine shell, the treatment chamber is fixedly connected with the combustion chamber, the treatment chamber is located in the combustion chamber, and the stirring mechanism is rotationally connected with the treatment chamber; the adjusting mechanism is fixedly connected with the stirring mechanism and used for adjusting the air inlet amount of the combustion chamber. In order to ensure that the phosphorus sludge in the treatment chamber is uniformly heated, the stirring mechanism is used for stirring, the adjusting mechanism is used for judging the distribution condition of the phosphorus sludge in the treatment chamber, and the air inlet amount of the corresponding position can be adjusted in a targeted manner according to the distribution amount of the phosphorus sludge at different positions in the treatment chamber; and the temperature distribution in the combustion chamber is matched with the phosphorus sludge distribution in the treatment chamber, so that the heating efficiency of the phosphorus sludge is improved.

The invention provides a phosphorus-carbon negative electrode material and a preparation method and application thereof, and the preparation method comprises the following steps: mixing porous carbon and an amine solution of red phosphorus for dipping to obtain mixed slurry, and carrying out solid-liquid separation to obtain filtrate and filter residues; drying the filter residue to obtain a solid; and adding the solid into the filtrate, and repeatedly carrying out mixed impregnation, solid-liquid separation and drying until the filtrate is used up to obtain the phosphorus-carbon negative electrode material. According to the preparation method, a liquid phase deposition method is adopted, the deposition amount of red phosphorus particles in the pore structure of the porous carbon matrix is increased, meanwhile, the risk of producing white phosphorus can be effectively reduced, the safety performance of the phosphorus-carbon negative electrode material is improved, and large-scale production is facilitated.

This invention relates to a method for producing high-purity red phosphorus, comprising: placing high-purity white phosphorus in an inner high-purity quartz tube; after the high-purity white phosphorus cools and solidifies, inserting the inner high-purity quartz tube into an outer high-purity quartz tube; installing a stainless steel pipe joint at the opening of the outer high-purity quartz tube; inserting the sealed outer high-purity quartz tube into an infrared electric heater; inserting the infrared electric heater into a stainless steel sealed pressure vessel and installing a cap; sealing the stainless steel sealed pressure vessel; preheating and liquefying the high-purity white phosphorus under nitrogen protection and atmospheric pressure until all moisture in the high-purity white phosphorus evaporates; pressurizing the outer high-purity quartz tube and maintaining internal and external pressure balance, raising the temperature to 350℃-380℃; and when the temperature drops below 250℃, forcibly cooling and discharging the material from the stainless steel sealed pressure vessel. This invention employs nested inner and outer high-purity quartz tubes, with the material discharging from the inner high-purity quartz tube for easy removal of the red phosphorus; and filling both the inner and outer sides of the outer high-purity quartz tube with nitrogen to maintain pressure balance and ensure safety.

The present invention discloses an electrochemical method for preparing phosphite diester compounds. The method comprises: uniformly mixing an organic solvent, white phosphorus, an alcohol, and an electrolyte, and conducting an electrolytic reaction in a constant current mode to obtain the phosphite diester compounds. The method uses alcohol as a chlorine source and electro-oxidizes white phosphorus to produce the phosphite diester compounds with high Faradaic efficiency. Because this method directly uses inexpensive and readily available white phosphorus and alcohol as raw materials, and the only byproduct is hydrogen, it meets the requirements of green synthesis. Furthermore, the reaction has a high Faradaic efficiency, promising promising prospects for industrial application.

The application provides a trialkyloxyphosphine compound derivative shown in formula (I) and a preparation method thereof. The trialkyloxyphosphine compound derivative is an organic phosphorus compound with a structure similar to that of trialkyloxyphosphine, which is directly synthesized by using white phosphorus. The process method avoids the use of highly polluting chlorine gas and subsequent emission problems in traditional phosphorus chemical production, and is a more environmentally friendly production method. In addition, the method disclosed by the application has simple steps, mild reaction conditions, simple post-treatment, and can obtain a yield of more than medium.

The invention discloses a non-hazardous chemical treatment method for white phosphorus, which comprises the following steps: firstly, preparing a copper sulfate solution by using copper sulfate and water, adding white phosphorus to be treated into the copper sulfate solution for chemical reaction, and converting the white phosphorus into cuprous phosphide; then, potassium permanganate is added into the reaction liquid of the white phosphorus and the copper sulfate step by step for multiple times, cuprous phosphide is removed through a chemical reaction, and the white phosphorus wrapped by the cuprous phosphide continues to react with the copper sulfate until the white phosphorus and the cuprous phosphide in the reaction liquid are completely removed through the reaction. The non-hazardous chemical treatment method for the white phosphorus is simple and safe to operate; the treatment cost is low and the efficiency is high; the environment is protected.

The utility model relates to the technical field of vacuum equipment, and discloses a phosphorus cracking source which comprises at least one white phosphorus pool, a cracking device, a communicating pipeline, at least one white phosphorus control valve and at least one angle valve. The at least one white phosphorus pool is used for generating white phosphorus steam. The cracking device is communicated with at least one white phosphorus pool and used for receiving white phosphorus steam generated by the white phosphorus pool for cracking. The communicating pipeline is used for connecting at least one white phosphorus pool and the cracking device. And the white phosphorus control valve is arranged on the communicating pipeline and is used for controlling the flow of the white phosphorus steam. And the at least one angle valve is arranged on the communicating pipeline and is positioned between the at least one white phosphorus pool and the at least one white phosphorus control valve.

The invention discloses an FJH-based monazite smelting integrated comprehensive recovery technology which is characterized in that pressed balls of monazite powder and reducing carbon powder are subjected to flash evaporation Joule heating, and crystal structures such as indissolvable xenotime and the like in monazite are effectively destroyed through FJH high-temperature instantaneous reduction cracking, so that the purity of the monazite is improved, and the purity of the monazite is improved. The leaching activity of heavy rare earth elements such as yttrium (Y) and uranium (U) wrapped in acid-insoluble slag is improved, then low-temperature (oxygen-enriched) air is introduced to oxidize phosphorus, tail gas is washed with water to recover phosphoric acid, the pressed balls after reaction are crushed, acid dissolution is performed, radioactive substances are separated, and then concentration is performed. According to the technology, the recovery rate of rare earth elements such as yttrium and radioactive element uranium is high, the potential safety hazard of white phosphorus is solved, the leaching activity of heavy rare earth elements such as yttrium and uranium wrapped in the acid-insoluble slag is remarkably improved, the rare earth recovery rate is high, the radioactive element recovery rate is high, the phosphorus recovery rate is high, phosphorus harm is avoided, a small amount of waste liquid is generated, and the method is accurate, controllable and low in energy consumption.

The invention provides a preparation method of a tri (aryl ethynyl) phosphine compound, and the tri (aryl ethynyl) phosphine compound is a tri (aryl ethynyl) phosphine compound which is shown in a formula (II) and contains a triaryl ethynyl structural unit. The tri (aryl ethynyl) phosphine compound is directly synthesized from white phosphorus and an aryl acetylene compound under the action of alkali, an activating agent and an assistant, and the process avoids the problems of use of chlorine with great pollution and subsequent emission in the traditional phosphorus chemical production, and is a more environment-friendly production method. In addition, the method disclosed by the invention is mild in reaction condition, relatively short in reaction time and simple in post-treatment, and relatively high yield can be obtained.