65 results about "Physical separation" patented technology

The invention belongs to the field of photovoltaic module recovery, and particularly relates to a method for recovering glass and silicon powder from a waste photovoltaic module. The method comprises the following steps: (S1) crushing the waste photovoltaic module, and mixing the obtained powder with water to form slurry; (S2) adjusting the pH value of the slurry to be alkaline to obtain alkaline slurry; (S3) the alkaline slurry is mixed with a collecting agent, an inhibitor and a foaming agent, then flotation separation is conducted, and coarse silicon powder and a glass foam layer are obtained; (S4) cleaning the coarse silicon powder to obtain a silicon powder product; and (S5) sequentially carrying out defoaming, solid-liquid separation and washing on the glass foam layer to obtain a glass product. By optimizing the slurry pH, flotation reagent combination, washing and other process conditions, the separation effect of the silicon powder and the glass powder is improved, the problem that separation is not thorough due to similar surface properties in a traditional physical separation method is solved, the reagent residual quantity on the surface of the silicon powder is reduced, and the subsequent purification cost is reduced.

The application discloses a method for recombining sub-products based on ingredient composition, which comprises the following steps: separating a homogeneous mixture into a plurality of homogeneous intermediate products with different ingredients by a physical separation method; and selecting at least two homogeneous intermediate products to be uniformly mixed according to a set ratio by using a digital blending technology, so as to obtain a required sub-product. By using the method, a single product can be converted into a plurality of sub-products with different characteristics from the initial product without interfering with the existing production process of the product. The process is simple, the process is controllable, and the method is suitable for large-scale production and has a wide application prospect.

The invention discloses a method for enhancing biological leaching of copper in a waste circuit board by utilizing magnetite. The method comprises the following steps: adding the pre-crushed waste circuit board and magnetite into a 9K culture medium with the pH value of 1.8-2.0 according to a certain mass ratio, inoculating Acidithiobacillus ferrooxidans as a leaching strain, and carrying out a leaching reaction under a constant-temperature oscillation condition. The magnetite is added, so that the leaching of copper in the circuit board is remarkably enhanced, the leaching rate is remarkably improved, and the leaching period is shortened. And compared with the microbiological leaching result without magnetite, the copper leaching rate is improved by 12-32%. By utilizing the difference between the circuit board and the magnetite in particle size, the magnetite can be recycled from the leaching residues through a physical separation means for a new round of leaching. The method is simple in process, the strain is easy to culture, and the method has good environmental friendliness and is suitable for green and efficient recovery of copper in the waste circuit board.

The invention relates to the technical field of washing water treatment, and discloses a gradient type oil-solid and water pure physical separation system and method for MTO washing water.The separation system comprises a liquid inlet pipe, a liquid inlet valve and a liquid inlet pump are installed on the liquid inlet pipe, and a secondary deslagging system, a secondary oil-water separation system and a buffer water storage tank are sequentially connected to the liquid inlet pipe in the liquid inlet direction; a liquid level sensor and a backwashing system are mounted on the buffer water storage tank; the backwashing system is sequentially communicated with the secondary deslagging system and the secondary oil-water separation system; a buffer flow guide mechanism is installed at the liquid inlet end of the second-stage deslagging system, and a stepped filler assembly is installed in the second-stage deslagging system. A physical gradient separation process is adopted, step-by-step accurate removal from macroscopic particles to microscopic emulsified oil and efficient recovery of oil phase components in wastewater can be realized, the turbidity and solid content indexes of effluent are remarkably improved, and long-period continuous stable operation can be realized.

The invention provides a method for analyzing the oxygen stable isotope ratio of water in a highly alcoholic beverage, and relates to the technical field of oxygen isotope analysis. The analysis method comprises the following steps: selecting at least two water samples with known oxygen isotope ratios and different values as additive water; diluting the same high-alcohol beverage to be detected by adding water to obtain a diluted sample; measuring an oxygen isotope ratio; and according to the oxygen isotope ratio of the added water and the oxygen isotope ratio of the diluted sample, calculating the oxygen isotope ratio of the water in the highly alcoholic beverage to be measured. According to the analysis method, the concentration of ethanol is reduced through dilution, so that interference of isobaric elements is avoided; and physical separation is replaced by mass conservation equation calculation, and a complex distillation device is not needed. According to the method, pretreatment is remarkably simplified, cost and errors are reduced, and rapid and accurate analysis of the water oxygen isotope in the highly alcoholic beverage is achieved.

The invention relates to the technical field of mineral resource mining and mineral separation, and discloses a barite ore open-pit mining harmless mineral separation novel process which comprises the following steps: S1, adopting an open-pit mining mode, stripping surface coverings, and collecting barite raw ore; s2, raw ore primary washing and separation, specifically, the collected raw ore is washed with water, barite rough ore and primary tailings are separated out, and the primary tailings comprise ore washing muddy water and slag; s3, the ore washing muddy water generated in S2 is separated into coarse particle materials and fine muddy water in a physical separation mode, the coarse particle materials and the fine muddy water are 50 meshes or above, according to the novel barite ore open-pit mining harmless beneficiation technology, through all-component separation and resource utilization of tailings, a traditional tailing treatment mode is thoroughly changed, the ore washing muddy water generated by primary washing of raw ore is recycled, and the ore washing muddy water generated by secondary washing of the raw ore is recycled. Through physical separation, reselection and solid-liquid separation processes, fine sand products, soil backfill materials and process reuse water can be obtained through conversion, and no slurry waste residues exist.

The invention discloses a device for repairing underground water pollution of an in-production enterprise by combining bioelectricity-Fenton with a circulating well. The device comprises an extraction well which is vertically arranged underground and is communicated with underground water, and a suspended matter separation mechanism, an electrode display mechanism and a strong oxidation mechanism which are sequentially connected with the extraction well, the suspended matter separation mechanism comprises a separation containing tank communicated with the extraction well and provided with an upward opening, a separation tank top cover with a downward opening is arranged at the top of the separation containing tank, a plurality of separation input pipes communicated with the interior of the separation containing tank are arranged at the bottom of the separation containing tank, and a plurality of suspended matter output pipes communicated with the interior of the separation containing tank are arranged on the side wall of the separation containing tank. The top cover of the separation tank is connected with a separation output pipe which vertically extends in a sliding manner; the device integrates four core technologies of physical separation, electrochemical reaction, Fenton strong oxidation and biodegradation, internal circulation of an underground water body is formed through the circulating well, and underground water discharge or secondary pollution in the remediation process is avoided.

The invention relates to the field of fuel combustion, in particular to an experimental system and a measuring method for cooling and coking characteristics of high-temperature cracked hydrocarbon fuel, physical separation is realized by designing a high-temperature cracking section and a cooling and coking section, and the problem of experimental result mixing caused by coupling of the high-temperature cracking section and the cooling and coking section in a traditional experiment is effectively avoided. According to the separation design, coke generation characteristics in the cooling stage can be independently researched, and the device can flexibly simulate various high-temperature and cooling conditions in actual working conditions by accurately controlling experimental conditions such as the flow rate, the temperature and the pressure of the fuel / condensation medium, and is suitable for researching coking behaviors of various types of fuels.

The invention relates to the technical field of asphalt performance detection, and discloses a volatile component release characteristic-based modified asphalt performance detection method which comprises the following steps: preparing a thin-layer sample and putting the thin-layer sample into a closed detection chamber; linear temperature rise and flow rate switching are carried out to construct a dynamic mass transfer environment; detecting gas concentration to generate a response curve containing fluctuation characteristics; analyzing the curve to construct flow velocity sensitive and insensitive characteristic components; and determining the swelling or dispersing performance of the rubber powder based on the characteristic component. The method comprises the following steps: by superposing a periodically changing carrier gas flow velocity in a continuous heating process, separating a mixed gas concentration signal value into a flow velocity sensitive component and a flow velocity insensitive component by utilizing a dynamic difference that a surface free component is controlled by external convective mass transfer and an internal swelling component is controlled by internal diffusion; no physical separation or chemical extraction is needed, and free oil components which do not participate in the reaction and swelling oil components which are absorbed by rubber powder in the asphalt can be quantitatively distinguished.

The utility model relates to a rainwater floating object physical separation structure, and relates to the technical field of rainwater collection. The drainage pipeline is arranged on the frame body; the filter screen is arranged at the top of the rainwater tank; the purification box is arranged between the rainwater tank and the filter screen; and the cleaning mechanism is arranged between the purification box and the filter screen and is used for collecting and cleaning impurities. The rainwater collecting and storing device has the advantages that when rainwater is collected and stored, impurities doped in the rainwater are separated, the impurities are not prone to being soaked and fermented for a long time to generate unpleasant odor, and meanwhile the rainwater quality is improved.

The invention relates to the field of waste liquid treatment, and particularly discloses a DMF (Dimethyl Formamide)-containing waste liquid recovery process. The invention relates to a DMF-containing waste liquid recovery process. The process comprises the following steps: S1, coarse steaming treatment; s2, light component removal treatment; s3, heavy component removal treatment: adding an alkaline amine compound into the first kettle residual liquid obtained in S2, and heavy component removal; and S4, carrying out secondary coarse steaming treatment to obtain a DMF product. In the recovery process, the temperature, the pressure and the ethanolamine addition amount of each process are precisely matched, so that the separation efficiency is ensured, the energy consumption is reduced, closed-loop cooperation of physical separation-chemical corrosion prevention-secondary purification is formed, efficient recovery of DMF is realized, the recovery purity meets the industrial requirements, and the method is suitable for industrial production. Meanwhile, the equipment corrosion contradiction in the high-temperature rectification process is effectively relieved, the process meets the industrial production requirement, high-purity DMF can be obtained, the recovery rate is not lower than 95%, and the purity is not lower than 99.9%.

The application discloses a kind of ship oil-containing pollutants production ship fuel oil physical and chemical treatment device, belong to environmental protection hazardous waste disposal and resource utilization technical field.The existing process long cycle, low efficiency and equipment matching problem is solved.The device includes: with steam jacket and frequency conversion stirring mechanism's reaction kettle, high speed three-phase centrifugal separator, flexible pipeline system connecting each unit, electric heating steam generator and electric control system.The application is by "chemical reaction-physical separation" two-stage process, with efficient centrifugal separation instead of natural sedimentation, processing cycle is shortened to 8 hours from several days, high efficiency of deashing and degrading, can the ash content of raw material oil is stably reduced from 1.4% above to 0.07% below, and the key indicators of the regenerated fuel oil produced meet the national standard GB / T17411-2015.The whole set of equipment is strong in adaptability, and is efficient and stable in operation.

The invention discloses a tall oil acid production method based on synergy of chemical conversion and physical separation, and belongs to the technical field of oleochemical industry. The method creatively utilizes Diels-Alder reaction characteristics of abietic acid and maleic anhydride, and is realized by the following steps: firstly, carrying out vacuum dehydration and degassing pretreatment on crude tall oil; then adding metered maleic anhydride to perform selective conversion under the catalysis of Lewis acid according to the content requirement of the target product abietic acid; performing molecular distillation separation on the reaction product to obtain light fraction fatty acid and heavy fraction abietic acid maleic anhydride resin; and finally, freezing and squeezing to obtain a tall oil acid product with precisely controllable abietic acid content. The technical limitation of a traditional physical separation method is broken through, the added value of the byproduct resin is increased by 50% or above, energy consumption is reduced by 35%, and the method is particularly suitable for customized production of medicine-grade, food-grade and other high-added-value products.

This application discloses a molding apparatus for maintaining material quality through solid-liquid separation, relating to the technical field of physical separation equipment. The apparatus includes a container, a body, an upper mold, a lower mold, and a drive component. The container includes a barrel, a filter element, a drain pipe, and a feed pipe. The container also includes an aeration mixer with a first impeller for clearing blockages in the filter element. The feed pipe includes a first section and a second section. The container further includes a linkage component. A second impeller is partially disposed in the first section within the filtrate zone. The upper mold, the container, and the drive component are all fixedly mounted on the body. This application can control the quality of materials by controlling the solid-liquid separation function, reducing waste caused by substandard material quality, and effectively ensuring the processing and molding effect of the product.

The utility model discloses a novel oil-gas separator, and relates to the technical field of oil-gas separation. The oil-gas separator comprises a shell and an oil-gas separation assembly, the shell comprises an outer shell, a distribution base fixed to the top of the outer shell, a base fixed to the bottom of the outer shell and exhaust grooves evenly formed in the peripheral side of the base. The oil-gas separation assembly comprises an oil collection groove body installed on the inner ring of the base in a threaded fit mode, a gas separation base fixed to the inner ring of the oil collection groove body and a mask arranged outside the gas separation base in a sleeving mode. According to the oil-gas separator, a plurality of oil-gas separation channels formed by the spiral blades and the mask are arranged, and hydrophobic materials are coated on the surfaces of the spiral blades, so that the oil-gas separator can effectively utilize a physical separation mechanism (such as gravity settling, collision interception and the like) to improve the capturing efficiency of oil drops, and the oil drops are helpful to slide to the oil collecting groove body along the spiral blades; along with the gradual widening of the channel, the gas flow speed is reduced, so that the natural sedimentation of larger oil drops is facilitated, and the oil-gas separation effect is improved.

The invention discloses an organic fluorine wastewater treatment method and system based on multi-modal simulation. The method comprises the following steps: analyzing a wastewater sample to obtain suspended particle density distribution and dissolved state concentration indexes; the natural aggregation tendency is evaluated, and if natural effective separation cannot be achieved, the dynamic process that particles aggregate to form a separable structure under external intervention is simulated; iteratively optimizing the simulation parameters to obtain an optimized aggregation condition parameter set; predicting the form and stability of a separable structure, matching and simulating a physical separation mode, and identifying a wastewater characteristic region with a poor expected separation effect; and finally, aiming at the region, adjusting aggregation parameters to generate an enhancement scheme, evaluating the conversion efficiency and outputting verified aggregation processing scheme parameters. According to the method, virtual simulation and intelligent optimization are utilized, the pollutant aggregation behavior is accurately regulated and controlled, the whole-process collaborative design from microcosmic aggregation to macroscopic separation is realized, and the process development efficiency and the treatment effect stability are improved.

The present application relates to oil and gas field development and environmental protection technical field, especially an aging oil demulsification treatment method, comprising: mixing fly ash and sodium hydroxide, then calcining, acid leaching, then mixing with oily sludge and ferroferric oxide, reduction reaction, mixing the reduction reaction product with 3-mercaptopropyl triethoxysilane, modification reaction, to obtain magnetic adsorbent; mixing aging oil, partial phosphate and water, stirring, standing and separating, to obtain pretreated aging oil; adding magnetic adsorbent, complexing agent, wetting reverse agent and demulsifier to the pretreated aging oil, stirring, then microwave irradiation treatment, magnetic separation, vortex separation and centrifugal dewatering, to obtain purified oil. The present application removes FeS particles by magnetic adsorbent, combines with multi-assistant component synergistic demulsification and multi-field coupling physical separation, destroys the stable emulsification system of aging oil, and the process is efficient, suitable for industrial demulsification treatment of high stability aging oil.

The application discloses a method for quantitatively analyzing mercury in different occurrence states in sedimentary rocks, belongs to the technical field of geological rock analysis, extracts kerogen from whole rock, respectively determines the mercury content and the organic carbon content of the whole rock and the kerogen, then carries out high-temperature thermal desorption analysis on equal quality of the two, obtains a thermal desorption curve, divides the release stages of different mercury occurrence states according to the thermal desorption curve, and calculates the content and proportion of mercury in each stage, and finally combines the total mercury content of the whole rock, the mercury content of the kerogen and the mass ratio, and obtains the inorganic mercury content through mass balance calculation. The method divides mercury into organic matter combined state (in kerogen) and inorganic combined state through physical separation and high-temperature pyrolysis, overcomes the multi-solution problem of traditional correlation fitting, significantly improves the accuracy and reliability of mercury as a volcanic activity tracer, and verifies the experimental data through mass balance calculation, avoiding the misjudgment of a single fitting method.

The invention relates to the technical field of colloidal chemistry and physical separation, and discloses a chromatographic purification method of a type b haemophilus influenzae vaccine, which comprises the following steps: preparing a synergistic desolvation mobile phase containing 0.45 mol / L to 0.55 mol / L sodium chloride and 45 mmol / L to 55 mmol / L sodium citrate, and establishing an equilibrium field in pores of a chromatographic medium; adjusting the ion environment of the crude liquid to be consistent with that of the mobile phase, so that the free polysaccharide is subjected to conformation collapse; according to the method, a critical solvation environment in which high salt and specific lyophilic ions coexist is constructed, electrostatic repulsive force of polysaccharide chain segments is shielded, a hydration membrane of the polysaccharide chain segments is stripped, stretched line clusters are converted into compact spheres, and the high salt-specific lyophilic ions are separated from the compact spheres, so that the high salt-specific lyophilic ions in the polysaccharide chain segments are separated. Therefore, the volume difference with a conjugate is enlarged, the separation problem caused by volume pseudo-overlapping in conventional chromatography is solved, and high-resolution separation on a low-cost medium is realized.

The invention discloses a liquid-phase vinyl chloride monomer dehydration and purification system and method based on aggregation-induced demulsification, the system is formed by connecting a deslagging device A, a pre-demulsification separation device B and a high-precision demulsification separation device C in series, the system can continuously operate under the pressure difference of 0.05-0.1 MPa, the water content of the monomer is reduced to 100 mg / L or below, and the influence of acidic materials and iron ions on polymerization is avoided. And while mechanical impurities and part of autopolymers are removed, emulsified water in the vinyl chloride monomer is efficiently removed in a pure physical manner, so that the purity of the monomer is improved, and the quality and performance of a downstream polyvinyl chloride product are further enhanced. The system adopts pure physical separation, is free of chemical agents and resistant to pollution and blockage, has the operating elasticity of 50%-200%, is suitable for a polyvinyl chloride device, improves the purity of monomers, and further enhances the quality and performance of downstream polyvinyl chloride products. The method solves the problems of high environmental protection and treatment cost pressure and high investment cost caused by the generation of strong corrosive waste alkali liquor in the traditional solid alkali method in the current vinyl chloride monomer dehydration.

The invention discloses a method for extracting calcareous microfossils of consolidated sediments, which comprises the following steps: S1, taking a rock core sample or a rock debris sample of the consolidated sediments, cleaning the surface of the rock core sample or the rock debris sample, and crushing the rock core sample or the rock debris sample to obtain a debris sample; s2, weighing a chipping sample, soaking the chipping sample in water, heating the chipping sample, and then freezing the chipping sample to obtain a frozen sample; s3, hydrogen peroxide is added into the frozen sample and mixed, then sieving and cleaning are conducted, and first particles are obtained; adding a weakly alkaline reagent and heating to obtain a first mixture; s4, adding an anti-flocculating agent into the first mixture, mixing, and carrying out ultrasonic treatment to obtain a second mixture; and then sieving, cleaning, drying and collecting a particle sample. According to the method, more calcareous microfossils are physically separated out, chips adhering to the surfaces of the calcareous microfossils fall off, chemical decomposition of the fossils and adhering particles is promoted, meanwhile, preservation of fossil shells is facilitated, and fine particles are prevented from being flocculated and precipitated.

This invention provides a method for purifying sandy kaolin ore, the resulting kaolinite concentrate, and its applications. The method includes the following steps: providing a kaolin slurry; adding a flotation agent to the kaolin slurry for conditioning to obtain a dispersed slurry; performing positive flotation on the dispersed slurry under acidic conditions to obtain a rough kaolinite concentrate; subjecting the rough kaolinite concentrate to acid leaching, followed by solid-liquid separation to obtain a final kaolinite concentrate. This invention achieves efficient recovery of fine-grained kaolinite from sandy kaolin ore, significantly improving separation efficiency compared to traditional physical separation methods. The resulting kaolinite concentrate exhibits significantly reduced iron and titanium impurity content, and its whiteness meets the technical requirements for high-grade ceramic raw materials or fillers, thus broadening the product's application value.

The utility model discloses a cutting fluid floating oil and sediment separating device, which belongs to the technical field of cutting fluid production equipment and comprises a base, an operating platform and a separating box body, and the interior of the box body is divided into a scum separating cavity, a left filtering chamber and a right filtering chamber through a main partition plate and an auxiliary partition plate. And in cooperation with a first flow guide baffle, an arc-shaped flow guide plate, a stepped baffle and other assemblies, physical separation of floating oil and sediment in the cutting fluid is achieved. The sediment collecting assembly is arranged in a sliding mode through a drawing notch, a metal filter screen and a magnet block are arranged in the sediment collecting assembly, and non-metal impurities and magnetic metal filings can be collected in a classified mode. Due to the layout design of the liquid inlet, the liquid outlet and the double blow-down valves, stable flowing of the fluid and partitioned discharge of impurities are ensured. According to the device, through a multi-stage cavity structure and a flow guide system, floating oil blocking, solid grading sedimentation and convenient maintenance are efficiently achieved, and the cutting fluid preliminary purification efficiency and resource recycling convenience are improved.

The utility model discloses magnetic density separation equipment for classifying electronic waste particles, which relates to the technical field of electronic waste treatment and comprises a bottom plate, and four supporting legs and two supporting plates are fixedly connected to the upper surface of the bottom plate. Superconducting magnets fixed to the supporting legs at the corresponding positions and a plurality of rotating rods rotationally connected with the supporting plates at the corresponding positions are arranged above the bottom plate. According to the device, various metals mixed in electronic wastes can be effectively separated at the same time through the paramagnetism of the magnetic fluid and the density difference of different metals, compared with other traditional schemes, the process steps are greatly shortened, and compared with a traditional method depending on chemical reagents or high-temperature smelting, physical separation does not need to use strong acid, cyanide or high temperature, and the cost is reduced. Separation is achieved only through physical fields such as a magnetic field and water flow, so that emission of toxic waste water and waste gas is remarkably reduced, the environmental protection treatment cost of enterprises is reduced, and meanwhile workers are prevented from making direct contact with heavy metal and harmful chemical substances.

The invention belongs to the technical field of ferrous metal beneficiation, and particularly relates to a physical separation method for recovering low-grade titanium ore from iron separation tailings, which is characterized by comprising the following steps of: 1, introducing the ilmenite iron separation tailings into a sloping plate concentrator for concentration treatment, and then feeding concentrated underflow into a preselection spiral chute for reselection and preselection; a physical separation process is adopted in the whole process, chemical agents such as a collecting agent and an inhibitor needed by a flotation method are not used, the agent purchasing cost is reduced, pollution of the chemical agents to the environment is avoided, and the environmental protection policy requirement is met; in addition, according to the method, resources which are possibly abandoned originally in the iron dressing tailings are treated, low-grade titanium ore is recycled from the resources, titanium concentrate and secondary iron ore meeting the industrial standard are produced, meanwhile, the tailings can be used for producing machine-made sand, multi-level and total-factor utilization of the tailings resources is achieved, and the comprehensive utilization rate of mineral resources is increased.

The utility model discloses a precious metal waste physical separation and recovery device which comprises a sediment box, a separation box is arranged on one side of the sediment box, a multi-stage separation mechanism is arranged in the separation box, a plurality of opening and closing doors are arranged on the separation box, a liquid level monitoring mechanism is installed on the top of the separation box, and the multi-stage separation mechanism comprises a rotating shaft. A driving motor is fixedly connected to the end of the rotating shaft, a plurality of circular filter plates are mounted on the rotating shaft, and a mounting frame is arranged at the top of one side of each circular filter plate. According to the physical separation and recovery device for the precious metal waste, a plurality of circular filter plates are driven by a driving motor to rotate, so that the lower half parts of the circular filter plates are used for filtering, the filtered parts are rotated to the upper part to brush precious metal, the circular filter plates are prevented from being blocked, precious metal powder is prevented from falling into a collection box, and electroplating wastewater is subjected to multi-stage separation; and meanwhile, the precious metal powder is collected, and the separation effect is effectively improved.

The invention provides a dry material dissolving device and a preparation system, and relates to the technical field, and the dry material dissolving device comprises a cylinder assembly, at least one feeding assembly, a partition plate and a stirring assembly. The output end of the second feeding part is arranged in the circumferential direction of the output end of the first feeding part in a surrounding mode so that an atomization structure can be formed at the output end of the second feeding part, the partition plate is installed in the barrel assembly and divides the barrel assembly into a first cavity and a second cavity, the first cavity is connected with the second cavity through a first through hole, and the stirring assembly extends into the barrel and is connected with the second cavity through a second through hole. The stirring assembly comprises a first stirring piece and a second stirring piece, and the first stirring piece and the second stirring piece rotate coaxially. According to the invention, the dry material can be wetted in advance, the condition that the material is agglomerated in the dissolving process is reduced, the physical separation of the dry material and the solution is realized, the condition that high turbulence generated in the first chamber damages molecular chains of the material, such as polyacrylamide, in the second chamber is avoided, and the preparation effect of the material solution is improved.

The invention discloses a method for recovering mother liquor after purification of crude products of vitamin D3 or metabolic derivatives thereof. Comprising the following steps: evaporating mother liquor obtained by purifying a crude cholecalciferol or calcifediol product to remove a solvent so as to obtain an oily concentrate, adding the oily concentrate into high-boiling-point grease, uniformly mixing, and collecting and recovering cholecalciferol or calcifediol by using a molecular distillation technology. According to the method, the molecular distillation technology is utilized to efficiently recover the cholecalciferol or the calcifediol, so that the content of the cholecalciferol or the calcifediol in the cholecalciferol or the calcifediol resin oil is increased to 80% or above, the recovery rate of the cholecalciferol or the calcifediol is 90% or above, the process is simple, the flow is short, the processing process is a physical separation process, and the method is suitable for industrial production. And no chemical substance harmful to the human body is added.

The invention relates to the technical field of detection and analysis, in particular to a method for determining the component content of an epoxypropane reactor sample by a gas chromatography external standard method, which comprises the following steps: carrying out physical separation pretreatment on a gas-liquid two-phase sample in a sampling steel cylinder at an outlet of an epoxypropane reactor; a gas chromatograph provided with a hydrogen flame ionization detector is adopted, under specified chromatographic conditions, a proper amount of samples are injected into a chromatographic system, a standard curve is established through an external standard method, and the content of each component is calculated. The method can rapidly and accurately determine the content of each component of the epoxypropane reactor sample, is high in accuracy and precision, and provides accurate data support for optimization of process parameters. By optimizing collaborative matching of a gas-liquid two-phase separation pretreatment process and chromatographic analysis conditions, the problems of poor separation effect, poor repeatability and the like in an epoxypropane reactor outlet sample analysis process are solved.

The invention relates to a method for deeply removing arsenic from high-purity antimony, and belongs to the technical field of metallurgical engineering. According to the method, tin serves as a trapping agent under the vacuum condition, tin and arsenic preferentially form a stable tin arsenide compound, and high-selectivity separation of antimony and arsenic is achieved; the method specifically comprises the following steps: (1) preparing and mixing raw materials; (2) vacuum distillation reaction: placing the high-temperature-resistant container in a vacuum furnace, and starting a vacuum system to reduce the pressure in the furnace to 10 Pa or below; heating the furnace to a reaction temperature of 580-630 DEG C at a heating rate of 8-15 DEG C / min, and keeping the temperature for 30-120 minutes at the temperature; and (3) separating the product to obtain an antimony product subjected to deep arsenic removal. According to the method, traditional physical separation (vacuum distillation) and chemical reaction (alloying) are successfully combined, and the dynamic bottleneck existing in a single physical method is overcome. By forming volatile tin arsenide, the migration path and the existence form of arsenic are ingeniously changed, so that high-selectivity and high-efficiency removal of low-content arsenic is realized.