22 results about "Sodium peroxide" patented technology

The invention relates to the technical field of precious metal recovery, in particular to a process for separating precious metal from copper-nickel smelting waste, which comprises the following steps: crushing and grading the waste, adding a sulfuric acid solution containing etidronic acid, leaching, and washing, drying and crushing filter residues to obtain a pretreated material; mixing the pretreated material with a sodium peroxide-sodium carbonate composite flux, roasting, leaching with water, and filtering to obtain a filter residue B; adding a leaching agent containing hydrochloric acid, sodium chlorate and 1, 2-cyclohexanediamine tetraacetic acid into the filter residue B according to the ratio of 1: 3-1: 5, and filtering to obtain filtrate C and filter residue C; adjusting the pH value of the filtrate C to 1.5-2.5, adding an ethanol solution of sodium N, N-diethyldithiocarbamate, precipitating, washing and calcining to obtain sponge palladium; adding ammonium chloride into the filtrate D, precipitating and calcining to obtain sponge platinum; and leaching the filter residue C by using a hydrochloric acid-chloroauric acid mixed solution containing diphenylthiourea, and replacing and calcining zinc powder to obtain crude gold. According to the process, the leaching rates of platinum, palladium and gold and the product purity are greatly improved; flux and reagent systems are optimized, consumption and energy consumption are reduced, waste liquid treatment is matched for up-to-standard discharge, and efficient resource recovery and environment-friendly cooperation are achieved.

The invention provides a method for determining boron element in iron ore, which comprises the following steps: weighing 0.2 g of sample, uniformly mixing with a flux, heating to red at 700-800 DEG C, cooling, adding sodium peroxide for secondary melting, dissolving in water, and transferring to a beaker; adding ethanol to boil, fixing the volume to 500mL, filtering and taking 100mL, adjusting the pH value, adding hydrogen peroxide to slightly boil, cooling, adding barium carbonate to boil, diluting and filtering, and taking 25mL for color development determination. According to the method, sodium carbonate and / or potassium carbonate and sodium peroxide are adopted to form a composite flux, an iron ore sample is completely decomposed through secondary melting and step-by-step dissolution, and the sample decomposition efficiency is improved; the method is stable in recovery rate, is superior to a conventional method in precision, can accurately measure the boron content in the iron ore, meets the technical requirements on boron element detection in the fields of ferrous metallurgy, geological exploration and the like, provides an efficient and reliable detection means for boron content analysis, and ensures the accuracy and reproducibility of a detection result.

A method for recovering platinum group precious metal in a silicon carbide DPF catalyst comprises the steps that S1, smelting treatment is conducted, specifically, the silicon carbide DPF catalyst is crushed and then mixed with a smelting agent in a layered mode, a smelting reaction is conducted at the high temperature, and the smelting agent is composed of sodium carbonate and sodium peroxide; s2, leaching and separation are conducted, specifically, after the smelting product obtained in the step S1 is cooled, acid leaching treatment is conducted through hydrochloric acid, leaching liquid containing platinum group precious metal and residues are obtained through filtering separation, the residues are washed, and washing liquid is added into main leaching liquid; and S3, precious metal enrichment is conducted, specifically, the leachate obtained in the step S2 is enriched through a chemical precipitation method, the obtained precipitate is dissolved with aqua regia, and a platinum-palladium chloride mixed solution is obtained. The method is high in recovery rate, and under the optimal condition, the recovery rate of platinum can reach 91% or above, and the recovery rate of palladium can reach 96% or above; the process is simple, the cost is controllable, the used smelting agent is a common chemical raw material, and the cost is low.

The invention discloses a method for determining the content of impurities in high-purity iridium, and relates to the technical field of impurity detection. The method comprises the following steps: taking an yttrium oxide crucible as pretreatment equipment, carrying out alkali fusion treatment on a high-purity iridium wire sample by using sodium peroxide and NaOH, and dissolving a fused block by using hydrochloric acid to obtain a sample solution A; and then eluting the sample solution A by using a cation exchange column to remove Na < + > to obtain a solution B, and finally determining the contents of Rh and Pt in the solution B by using ICP-MS (Inductively Coupled Plasma Mass Spectrometry). The detection method is high in accuracy, good in repeatability and suitable for rapid and accurate detection of the impurity content in the high-purity iridium wire.

The invention provides a method for determining the tin content in fuming furnace waste residues through composite alkali fusion ICP-AES, and belongs to the technical field of chemical analysis and testing. The fuming furnace waste residues to be treated are taken, a composite alkali flux is added into the fuming furnace waste residues to be treated and mixed to be uniform, and the composite alkali flux is a mixture of sodium peroxide and sodium carbonate; the method comprises the following steps: heating a mixture containing fuming furnace waste residues and a composite alkali flux to 400-700 DEG C, and carrying out gradient melting; after fusion is completed, transferring a melt into water for leaching, acidizing a product obtained by leaching, filtering, and fixing the volume of filtrate to obtain a solution to be detected; and preparing a standard solution and a blank solution, determining in an inductively coupled plasma emission spectrometer, and obtaining the tin content in the fuming furnace waste residue according to the obtained working curve. The method is applied to determination of low tin content, and the tin content in the tin-containing waste slag of the fuming furnace can be rapidly and accurately determined.

The invention provides a reagent for treating steel industry membrane concentrated water and a water treatment method, and relates to the technical field of waste liquid treatment.The steel industry membrane concentrated water treatment reagent is prepared from, by mass, 0.8-4.5 parts of a first oxidizing agent, 0.5-3.5 parts of a second oxidizing agent and the balance auxiliary reagents, the first oxidizing agent is composed of 0.3-2.5 parts of sodium peroxide and 0.5-3.5 parts of ozone, the second oxidizing agent is 0.5-3.5 parts of sodium persulfate, and the dosage of the reagent is 3-15 g / L. Ozone is introduced by adopting an ultra-fine bubble technology; when the reagent is used for a water treatment process, ozone and sodium peroxide have a synergistic effect, so that the effect of reducing the COD value in membrane concentrated water is enhanced; an ozone ultra-fine bubble technology is adopted, so that addition of an additional catalyst can be avoided; according to the technology, the COD value of the membrane concentrated water can be effectively reduced, other suspended solids and heavy metal ions are treated, and reuse water meeting the standard is obtained.

The invention discloses high-crack-resistance fly ash-based all-solid-waste foam concrete and a preparation method thereof, and belongs to the technical field of solid waste resource utilization and building materials. The all-solid waste foam concrete is prepared from pretreated fly ash, S95-grade slag powder, semi-hydrated phosphogypsum, an organic-inorganic composite anti-cracking agent, a foaming component sodium peroxide and mixing water. The crack resistance and the mechanical property of the material are remarkably improved through the processes of synergistic activation pretreatment of the fly ash and the alkaline residues, in-situ synthesis of the organic-inorganic composite anti-cracking agent and the like. The bleeding rate of the obtained product is lower than 5%, the 28-day compressive strength is larger than 0.5 MPa, the crack area is smaller than 100 mu m < 2 >, all the raw materials are industrial solid waste, and high-value utilization of the solid waste is achieved. The composite material has the characteristics of low energy consumption, high crack resistance and environmental protection, and is suitable for building thermal insulation and filling engineering.

The invention provides a washing regeneration complexing agent for a waste oil adsorbent, a preparation method and a regeneration method of the waste oil adsorbent, and aims at performing regeneration treatment on an invalid adsorbent after treating waste electric oil to recover the activity of the adsorbent. The washing regeneration complexing agent is prepared by mixing alkali, sodium peroxide, rare earth oxide, an organic solvent and a surfactant; the regeneration method comprises the following steps: putting the invalid adsorbent into the ultrasonic bubbling cleaning device, adding the washing regeneration complexing agent to clean and remove residual oil in the invalid adsorbent and dredge internal pore channels of the adsorbent, then introducing water vapor to effectively remove pollutants such as organic matters remaining in the adsorbent, and finally drying to obtain the regenerated adsorbent. The process flow is simple, the performance of the regenerated adsorbent is greatly improved, the regeneration stability is high, and the cyclic utilization of the waste oil adsorbent is realized.

The invention provides a method for determining the content of precious metal elements in an automobile purification catalyst, and belongs to the technical field of analysis and detection. According to the method, a composite melting system composed of sodium peroxide, anhydrous sodium metaborate and sodium tungstate is constructed, an automobile purification catalyst sample is subjected to efficient melting decomposition, complete leaching of a melt is achieved in combination with a hydrochloric acid and tartaric acid composite acidification system, a tin-tellurium coprecipitation enrichment technology is introduced on the basis, and the purity of the automobile purification catalyst sample is improved. Trace precious metal elements such as platinum, palladium and rhodium are selectively precipitated and effectively enriched, and matrix interference is remarkably reduced; and then adding an indium internal standard solution and carrying out quantitative determination by adopting inductively coupled plasma emission spectrometry, thereby realizing high-sensitivity and high-accuracy analysis of the noble metal element. The method effectively solves the problems of incomplete sample decomposition, low precious metal recovery rate, serious matrix interference, poor detection result stability and the like in the prior art.

The invention belongs to the technical field of wave-absorbing materials, and particularly relates to a Ni / nitrogen-doped carbon composite wave-absorbing material and a preparation method thereof. The method comprises the following steps: dissolving melamine, terephthalaldehyde, nickel nitrate hexahydrate and terephthalic acid in a mixed solvent to obtain a mixed solution; adding a sodium oxyoxide solution into the mixed solution, uniformly mixing, carrying out hydrothermal reaction, and filtering, washing and drying after the reaction is finished, so as to obtain a Ni / COF precursor; and heating and calcining the Ni / COF precursor in a nitrogen atmosphere to obtain the Ni / nitrogen-doped carbon composite wave-absorbing material. The heating rate is 2-5 DEG C / min, the calcining temperature is 600-700 DEG C, and the calcining time is 1-3 hours. By adjusting the calcination temperature, the prepared composite wave-absorbing material has the advantages of small thickness, strong absorption and wide frequency band, and the preparation process is simple, easy to control and low in cost.

The application discloses a method for rapidly and accurately determining the phosphorus content in dolomite and limestone, and belongs to the technical field of raw material analysis. The method provided by the application comprises the following steps: melting a sample by using a mixed flux containing sodium carbonate and sodium peroxide, and detecting the phosphorus content by using a sodium fluoride-stannous chloride-phosphorus molybdenum blue colorimetric method. The method provided by the application can more accurately determine the phosphorus content in dolomite and limestone, the recovery rate of a standard addition recovery experiment is between 98-103%, and accurate data can be provided for the application of dolomite and limestone.

The present application relates to the technical field of battery material preparation, and particularly relates to a hard carbon composite material, a preparation method and a sodium ion battery. The preparation method comprises the following steps: providing a carbon source, sodium peroxide and phytic acid in a preset ratio to be mixed to obtain a mixture; performing a reduction reaction and a first heating in the mixture to obtain a porous hard carbon precursor; introducing borane gas into a reaction space in which the porous hard carbon precursor is located, and performing a second heating and a deposition reaction to obtain the hard carbon composite material. The present application further provides a hard carbon composite material and a sodium ion battery. The problems of low energy density and poor fast charging performance of the hard carbon used in the sodium ion battery are solved.

The application discloses a method for measuring tin content in polymetallic ore by alkali-salt acid-hydrofluoric acid acidification complexing, and belongs to the technical field of ore analysis and testing. The method is aimed at the problems of interference in tin determination and low recovery rate caused by high phosphorus, high aluminum, high silicon and complex matrix containing niobium and tantalum in the existing sulfuric acid system. The method adopts sodium peroxide to melt and decompose the sample, adds hydrochloric acid-hydrofluoric acid mixed acid for acidification complexing after hot water extraction, converts silicon, aluminum, niobium and tantalum into soluble fluorine complex, effectively inhibits the formation of colloids and the adsorption loss of tin, and then combines with inductively coupled plasma emission spectrometry to determine the characteristic spectrum of tin. The method has a standard addition recovery rate of 101-105%, and the comparison result is accurate and reliable compared with the potassium iodate titration method. The method is simple, efficient, effectively eliminates the interference of complex matrix, and is suitable for accurate determination of tin in high-phosphorus, high-aluminum and complex ore samples containing niobium and tantalum such as lithiophilite.

The invention relates to an ore melting agent for lepidolite concentrate and a lithium extraction process. The process comprises the following steps: grinding and mixing potassium pyrosulfate and lepidolite concentrate, then adding sodium peroxide, carrying out high-temperature calcination on the mixture of potassium pyrosulfate, sodium peroxide and sodium peroxide, leaching the calcined product by using strong acid to obtain lithium-containing filtrate, and extracting lithium element from the lithium-containing filtrate; according to the lithium extraction method for activating the lepidolite ore through potassium pyrosulfate-sodium peroxide coupling, potassium pyrosulfate serves as a good ore melting agent, in the process of extracting the lithium element from the lepidolite ore, potassium pyrosulfate can react with the lithium ore, and the lithium element is further extracted through coupling activation of potassium pyrosulfate and sodium peroxide; the lithium element is generated in the form of soluble sulfate of LiNaSO4, so that the lithium leaching concentration is high, and the lithium extraction rate is effectively improved.

The invention belongs to the technical field of comprehensive treatment of coal-based solid wastes, and discloses a method for extracting silicon and aluminum from coal-based solid wastes by alkaline leaching, which comprises the following steps: mixing and ball-milling mineral aggregates and auxiliary materials for 120-180 minutes under the conditions of 90-120 DEG C and 300r / min; wherein the mineral aggregate comprises fly ash, Fe2O3 and activated carbon; the auxiliary material comprises one or more of Na2CO3, CaO, La2O3, TiO2 and Ga2O3, and the auxiliary material comprises one or more of Na2CO3, CaO, La2O3, TiO2 and Under the protection of a nitrogen atmosphere, carrying out low-temperature reduction roasting at 200 DEG C for 10 minutes; reducing and roasting at the high temperature of 1200-1300 DEG C for 60 minutes, and naturally cooling for 15 minutes to obtain a reduced and roasted material; in an oxidation atmosphere, the reduction roasting material is placed under the conditions of 1000-1100 DEG C and 0.4 r / min to be subjected to oxidation roasting for 150 min; naturally cooling to room temperature to obtain roasted clinker; mixing the roasted clinker with a sodium carbonate solution, and carrying out primary alkaline leaching reaction to obtain primary leaching liquid and primary leaching residues; and mixing the primary leaching residues with a sodium peroxide solution, and carrying out a secondary alkaline leaching reaction to obtain a secondary leaching solution and secondary leaching residues.

The application relates to the technical field of waste lithium ion battery recycling, in particular to a method for lithium recovery by low-temperature efficient deconstruction of lithium iron phosphate based on the local strengthening effect of sodium peroxide. The method comprises the following steps: S1, uniformly mixing lithium iron phosphate material and sodium peroxide according to a preset mass ratio, grinding and refining to obtain a dry mixture containing sodium peroxide; S2, placing the mixture in a calcination device to obtain a calcination product; S3, water immersion separation: stirring and leaching the calcination product in deionized water, and performing solid-liquid separation to obtain a lithium-containing aqueous solution and an iron-based leaching residue; S4, lithium recovery and purification: removing impurities from the lithium-containing aqueous solution by separation and purification to obtain a lithium salt product; and S5, iron resource recovery: performing acid leaching treatment on the iron-based leaching residue to obtain an iron-containing leaching solution, so that the iron resource recovery is realized. The application solves multiple technical bottlenecks such as large acid consumption in the existing hydrometallurgy, high energy consumption in the pyrometallurgy and insufficient activity of conventional alkaline salt calcination.

The invention discloses a production process of deuterated sodium hydroxide d1, and belongs to the technical field of fine chemical engineering. The production process of the deuterated sodium hydroxide d1 provided by the invention mainly comprises the following steps: dropwise adding water into sodium peroxide solid powder under the conditions of argon atmosphere and ice salt bath, and monitoring the reaction through a nuclear magnetic resonance hydrogen spectrum, so that the reaction progress is effectively monitored, and the reaction is ensured to be complete. Through the anti-conventional addition method, the phenomenon that sodium peroxide is damped and gelatinized in a traditional production method can be effectively avoided, reaction conditions are easy to control, and a stable deuterated sodium hydroxide d1 product with a high deuteration degree can be obtained. And in the production process, a manner of dropwise adding water in stages is adopted, so that on one hand, adverse effects caused by intense reaction degree in the early stage of the reaction can be prevented, and on the other hand, complete reaction can be promoted, and the production efficiency of the deuterated sodium hydroxide d1 can be improved.

The invention provides a chemical reaction type leakage detection device for an irradiation test container, which comprises a monitoring container and a delivery pump, and is characterized in that the monitoring container and the delivery pump are communicated with inner and outer layer gaps of the irradiation test container to form a loop; the delivery pump provides power for the gas in the loop so as to perform gas circulation; sodium peroxide is contained in the monitoring container, and a temperature monitoring device and an oxygen monitoring device are arranged in the monitoring container; when the inner layer container of the irradiation test container leaks, water vapor is generated in the loop, and whether the irradiation test container leaks or not is judged according to the change of measured values of the temperature monitoring device and the oxygen monitoring device by monitoring the reaction of sodium peroxide in the container and the water vapor. According to the method, sodium peroxide and water are subjected to a chemical reaction to generate oxygen and release heat, so that the purpose of monitoring leakage of the irradiation test container is achieved, the risk of further development of leakage of the irradiation test container is reduced, and the irradiation test task of novel fuel is effectively supported.

The invention relates to the technical field of chemical analysis of materials, in particular to a dissolution method of corrosion-resistant YSZ powder, and aims to solve the problems that the YSZ powder is difficult to dissolve due to a stable cubic phase structure and the existing mixed acid method has high toxicity and high risk, and the dissolution method comprises the following steps: firstly, mixing sodium peroxide and a dry YSZ sample with uniform granularity according to a mass ratio of (15-20): 1; placing in a crucible; secondly, carrying out heat preservation melting at 600-700 DEG C for 15-20 minutes, and dissolving YSZ by using sodium peroxide; and finally, transferring the melt to a beaker, boiling and washing with deionized water, and adding 20-25 mL of hydrochloric acid for acidification, so that the sample is completely dissolved. According to the method, use of highly toxic reagents such as hydrofluoric acid is avoided, operation is easy and convenient, dissolution is complete, and a reliable pretreatment scheme is provided for accurate determination of yttrium oxide and impurity elements in YSZ.

The invention belongs to the technical field of acyclic compounds, and particularly relates to a preparation method and application of carbonyl-containing peroxide. Adding a carbonyl-containing compound into the sodium peroxide dispersion liquid to react, filtering, washing, standing, separating and drying to obtain a carbonyl-containing peroxide solution; wherein the sodium peroxide dispersion liquid is prepared by dispersing sodium peroxide in an organic solvent, and the carbonyl-containing compound is alkyl acyl chloride or alkyl chloroformate. The sodium peroxide is dispersed into the organic solvent, so that the reaction efficiency of the sodium peroxide can be optimized and improved, and safe and efficient synthesis of a peroxide product containing carbonyl is realized.

The present application belongs to the technical field of coal-based solid waste comprehensive treatment, and discloses a method for extracting silicon and aluminum from coal-based solid waste by alkali leaching, which comprises the following steps: placing mineral materials and auxiliary materials in a condition of 90-120 DEG C and 300 r / min to mix and ball mill for 120-180 min; wherein, the mineral materials comprise fly ash, Fe2O3 and activated carbon; the auxiliary materials comprise one or more of Na2CO3, CaO, La2O3, TiO2 and Ga2O3; under the protection of nitrogen atmosphere, low-temperature reduction roasting is carried out at 200 DEG C for 10 min; high-temperature reduction roasting is carried out at 1200-1300 DEG C for 60 min, and natural cooling is carried out for 15 min to obtain reduction roasting materials; under an oxidation atmosphere, the reduction roasting materials are placed in a condition of 1000-1100 DEG C and 0.4 r / min to carry out oxidation roasting for 150 min; natural cooling is carried out to room temperature to obtain roasting clinker; the roasting clinker is mixed with sodium carbonate solution to carry out primary alkali leaching reaction to obtain primary leaching solution and primary leaching residue; the primary leaching residue is mixed with sodium peroxide solution to carry out secondary alkali leaching reaction to obtain secondary leaching solution and secondary leaching residue.

The invention relates to the technical field of single-walled carbon nanotube films, and provides a single-walled carbon nanotube purification method, system and equipment and a readable storage medium. The purification method comprises the following steps: uniformly mixing a single-walled carbon nanotube crude product with sodium peroxide or sodium nitrate, and calcining to obtain a single-walled carbon nanotube crude product; the calcination treatment comprises the following steps: obtaining a material response coefficient according to a reference calcination temperature, a gas constant and carbon layer fracture apparent activation energy; constructing an optimal calcination temperature model according to the reference calcination temperature, the raw material metal impurity content and the material response coefficient; and obtaining the optimal calcination temperature based on the optimal calcination temperature model, and performing calcination treatment according to the optimal calcination temperature. According to the method, the optimal calcining temperature model is constructed by associating the metal impurity content of the raw material with the material response coefficient, and calcining treatment is carried out at the optimal calcining temperature obtained based on the optimal calcining temperature model, so that the limitation of fixed calcining temperature in the prior art is broken through, and dynamic calcining temperature regulation and control are realized.