468 results about "Bromine" patented technology

The invention belongs to the technical field of halide solid-state electrolyte, and relates to a high-conductivity and high-lithium-stability modified halide solid-state electrolyte material constructed by solid source plasma, and a preparation method and application of the high-conductivity and high-lithium-stability modified halide solid-state electrolyte material. According to the preparation method, a halide solid electrolyte is taken as a matrix, halogenated ammonium salt is taken as a solid source, and the halide solid electrolyte is subjected to synergistic doping modification of elements such as nitrogen, fluorine / chlorine / bromine and the like by utilizing a plasma technology, so that the modified halide solid electrolyte material is obtained. The modified halide solid electrolyte material shows excellent conductivity and lithium-lithium symmetrical battery performance, and has a wide market application prospect. Meanwhile, the preparation method provided by the invention is simple, rapid, efficient and convenient, is easy to control, and contributes to promoting the development and application of the high-performance halide solid electrolyte material.

The invention provides a surface-modified sulfide electrolyte and a preparation method thereof, and an all-solid-state battery, the surface-modified sulfide electrolyte comprises a sulfide electrolyte and a modification layer coated on the surface of the sulfide electrolyte, the chemical general formula of the modification layer is LiaMbNcXd, 0 < = a < = 3, 0 < = b < = 1, 0 < = c < = 1, 0 < = d < = 6, and 0 < = c < = 1. M is at least one element of magnesium, aluminum, calcium, iron, zirconium, niobium, tantalum, tungsten, gadolinium, yttrium, indium, hafnium, lanthanum and ytterbium, and X is at least one element of oxygen, sulfur, fluorine, chlorine, bromine and iodine. According to the surface-modified sulfide electrolyte, the modification layer with high ionic conductivity and high oxidation potential is coated outside the sulfide electrolyte, so that when the surface-modified sulfide electrolyte is applied to a positive electrode of an all-solid-state battery, the modification layer can improve the oxidation potential of the electrolyte on the premise of not reducing the ionic conductivity of the electrolyte; the effects of improving the interface stability between the positive electrode active material and the sulfide electrolyte and further improving the cycle performance of the battery are achieved.

Metal recovery and separation systems and methods, more particularly electrothermal chlorination (ETC) and electrothermal carbochlorination (ETCC) methods and systems for selective metal extraction, such as extraction of key metals from waste streams. Alternatively, other oxidizing agents, such as fluorine, bromine or iodine, may be used in place of or in combination with chlorine. Further, or other reducing agents, such as a metal (0), such as tin (0), and H2 (H2 included in argon, such as 1% to 5% by volume of H2 in argon, may be used in place of or in combination with carbon. Embodiments of the invention may utilize ETC to selectively recover In from ITO-containing waste, and utilize ETC in combination with ETCC to recover Ta from capacitor waste.

The utility model discloses a seawater concentration bromine extraction system based on deep waste heat recovery and new energy driving, and belongs to the technical field of salt chemical industry and new energy. On the basis of an existing seawater concentration bromine extraction system, a new energy mode is adopted for process heating, and heat exchange jackets are arranged on the outer walls of a sulfur combustion furnace 1 and a high-temperature SO2 flue 3; low-temperature air is sequentially fed into a heat exchange sleeve 26 and a heat exchange sleeve 20 through an air feeder 21 and exchanges heat with high-temperature and high-corrosion flue gas in a flue and higher-temperature flue gas in a sulfur combustion furnace, then the low-temperature air is fed into a miniature high-temperature waste heat hot water boiler 10, water is fed into a heating furnace, and cooled flue gas is subjected to circulating heat exchange through the air feeder 21. High-temperature water of the miniature high-temperature waste heat hot water boiler 10 is fed into the flash tank 23 and generates flash steam, and after the temperature of outlet water is reduced, the outlet water returns to the flash tank 23 for circulating heat exchange. Flash steam of the flash tank 23 is mixed with steam produced by the high-temperature heat pump steam producing device 37 and the new energy electric heating steam furnace 38, and then the mixture is sent to the liquid chlorine water bath 51 and the like for process heating.

The main object of the present invention is to provide an organic EL display that has excellent light emission characteristics to enable low voltage driving and has light emitting elements with high reliability, thereby serving to realize a desired current density. Provided is a display device including a substrate, a first electrode, a second electrode, a pixel separation layer, and an organic layer containing a light emitting layer, wherein the pixel separation layer contains a colorant (D-DL), has an optical density of 0.5 to 3.0 in the visible light wavelength range per μm of the thickness of the pixel separation layer, and has a plurality of pixel parts in a plan view. The detection intensity of the sulfur ion (S−), the detection intensity of the chlorine ion (Cl−), the detection intensity of the bromine ion (Br−), and the sum of the detection intensity of the chlorine ion (Cl−) and the detection intensity of the bromine ion (Br−), all measured by time-of-flight secondary ion mass spectrometry at a position 3 nm deep in each pixel part from the surface of the first electrode, the surface being in contact with the organic layer containing a light emitting layer, satisfy relationships represented by specific general formulas.

Provided are an electrolyte, a battery, and an energy storage device, for use in solving the problem in existing batteries of poor high-voltage cycling stability and safety of electrolytes. The electrolyte comprises a lithium salt, a solvent, and additives. The additives include a first additive and a second additive. The first additive is one or more of compounds as shown in formula I, and the second additive is one or more of compounds as shown in formula II. R1-R6 are each independently selected from F, a C6-C26 fluoro-substituted phenoxy group, and a C1-C20 fluoro-substituted alkoxy group, R7-R12 are each independently selected from halogen, a C1-C20 fluoro-substituted alkyl group, a cyano group, and an amino group, at least one of R7-R12 is selected from the cyano group, and the halogen includes one or more of fluorine, chlorine, bromine and iodine.

The invention relates to the technical field of flow batteries, in particular to a bromine-chromium flow battery system. According to the invention, one or more of hydrobromic acid, hydrochloric acid and hydroiodic acid are used as additives, and Br2 and the additives in the electrolyte are complexed to form Br2X <-> to exist in the electrolyte, so that battery performance reduction caused by overflow and precipitation of bromine gas in the positive electrolyte is avoided, and the efficiency of the bromine-chromium flow battery is improved; meanwhile, the flow battery system further relieves battery part aging caused by bromine overflow and capacity fading caused by bromine loss through the gas conveying device, so that the service life of the bromine-chromium flow battery is prolonged.

In order to solve the problem that an electrolyte in an existing battery is poor in high-voltage cycling stability and safety, the invention provides an electrolyte, a battery and an energy storage device, the electrolyte comprises a lithium salt, a solvent and an additive, the additive comprises a first additive and a second additive, the first additive is one or more of compounds shown in the formula I, and the second additive is one or more of compounds shown in the formula II; the second additive is one or more of compounds as shown in a formula II; wherein R < 1 > to R < 6 > are respectively and independently selected from F, fluorine-substituted phenoxy of C < 6 > to C < 26 > and fluorine-substituted alkoxy of C < 1 > to C < 20 >, R < 7 > to R < 12 > are respectively and independently selected from halogen, fluorine-substituted alkyl of C < 1 > to C < 20 >, cyano and amino, at least one of R < 7 > to R < 12 > is selected from cyano, and halogen comprises one or more of fluorine, chlorine, bromine and iodine.

The invention discloses a PTA wastewater ozone-biochemical coupling deep treatment method for inhibiting bromine oxidation. The method comprises pretreatment, pre-ozone oxidation-biological membrane coupling treatment, secondary coagulating sedimentation, post-ozone-BAC filter coupling treatment and an online monitoring control system. According to the process, ozone oxidation is limited in a direct oxidation stage by controlling the ozone dosage and optimizing the reflux ratio, so that oxidation of bromide ions is reduced to the greatest extent while the biodegradability of the wastewater is improved. The front ozonation unit and the rear ozonation unit both adopt high reflux ratio design, so that the direct contact concentration of ozone and raw water is reduced. The online monitoring control system adjusts the ozone adding amount and the reflux ratio in real time, so that the treatment effect is ensured, and meanwhile, generation of bromate is inhibited. The process can effectively remove refractory organic matters and ammonia nitrogen in the PTA wastewater, meanwhile, the bromate content is controlled at a lower level, and the process has a good treatment effect, economical efficiency and environmental friendliness.

An in situ protective coating is deposited on surfaces of chamber components of a reaction chamber at high temperatures. The in situ protective coating may be deposited at a temperature greater than about 200° C. to provide a high quality coating that is resistant to certain types of halogen chemistries, such as fluorine-based species, chlorine-based species, bromine-based species, or iodine-based species. Subsequent coatings or layers may be deposited on the in situ protective coating having different etch selectivities than the underlying in situ protective coating. The in situ protective coating may be deposited throughout the reaction chamber to deposit on surfaces of the chamber components, including on chamber walls.

The present invention relates to a growth inhibitor for forming a thin film, a method of forming a thin film using the growth inhibitor, and a semiconductor substrate fabricated by the method. More specifically, the growth inhibitor for forming a thin film of the present invention is a compound represented by Chemical Formula 1: AnBmXoYiZj. In Chemical Formula 1, A is carbon or silicon; B is hydrogen or an alkyl group having 1 to 3 carbon atoms; X includes one or more of fluorine (F), chlorine (Cl), bromine (Br), and iodine (I); Y and Z independently include one or more selected from the group consisting of oxygen, nitrogen, sulfur, and fluorine and are different from each other; n is an integer from 1 to 15; o is an integer greater than or equal to 1; m is 0 to 2n+1; and i and j are integers from 0 to 3.

The invention discloses a high-entropy polyanion halide solid electrolyte as well as a preparation method and application thereof, and belongs to the technical field of electrochemical energy storage. The chemical general formula of the high-entropy polyanion halide solid electrolyte is AxMyNzXmOn, A is any one or more of Li, Na, K, Cu and Ag, M is any one or more of Ta, Zr and Nb, N is composed of P, Si, B, C and S, and X is one or more of fluorine, chlorine, bromine and iodine. According to the solid electrolyte, eight polyanion radicals (PO4 < 3->, SiO4 < 4->, CO3 < 2->, BO < 2->, SO4 < 2->, P2O74 <->, ClO4 <-> and B4O74 <->) are introduced into an A-M-Cl frame structure, so that the solid electrolyte can be used for preparing the high-entropy polyanion halide solid electrolyte. The polyanion radicals are connected with the adjacent [MCl] polyhedrons in a cluster form through common edges and common vertexes, so that a chain structure is formed. According to the halide solid electrolyte disclosed by the invention, the torsion resistance of an amorphous structure is increased through a special connection mode, a free space is expanded, and efficient transmission of lithium ions is facilitated. The example conductivity of the halide electrolyte material at room temperature exceeds 20 mS cm <-1 > at most.

The invention discloses a mixed fire extinguishing agent and a testing method thereof, and the mixed fire extinguishing agent comprises 2-bromo-3, 3, 3-trifluoropropene and perfluoro-2-methyl-3-pentanone; the test method comprises the following steps: S100, mixing the 2-bromo-3, 3, 3-trifluoropropene and the perfluoro-2-methyl-3-pentanone according to a preset mass ratio, and adding the 2-bromo-3, 3, 3-trifluoropropene and the perfluoro-2-methyl-3-pentanone into the mixture, s200, controllable flames are generated; s300, a mixture of the 2-bromine-3, 3, 3-trifluoropropene and the perfluoro-2-methyl-3-pentanone is adopted to carry out fire extinguishing on the controllable flame, and a mixture of the 2-bromine-3, 3, 3-trifluoropropene and the perfluoro-2-methyl-3-pentanone is adopted to carry out fire extinguishing on the controllable flame And S400, the minimum fire extinguishing concentration of the mixture is measured. The mixed fire extinguishing agent and the testing method thereof have the advantage that the mixed fire extinguishing agent capable of effectively extinguishing fire and the testing method thereof are provided.

There is provided a method for manufacturing graphene, the method comprising: forming graphene on a non-metallic surface of a substrate by CVD in a CVD reaction chamber, wherein the step of forming graphene comprises introducing a precursor in a gas phase and / or suspended in a gas into the CVD reaction chamber; wherein the precursor consists of one or more compounds selected from a C4-C10 organic compound; wherein the organic compound is branched such that the organic compound has at least three methyl groups; and wherein the organic compound consists of carbon and hydrogen and, optionally, oxygen, fluorine, chlorine and / or bromine.

The invention belongs to the technical field of inorganic matter preparation methods, and particularly provides a method for extracting bromine in brine, which comprises the following steps: S1, acidification and oxidation pretreatment of brine; s2, bromine molecules are blown out through air; s3, absorbing sulfur dioxide and fresh water; s4, distilling and purifying bromine; s3, a method for adjusting the bromine concentration C in the finished liquid in the absorption process of sulfur dioxide and fresh water is included, and S300, a high-pressure atomization nozzle array with the pore diameter being 1.0-2.0 mm is adopted, the distance between nozzles is matched with the sectional area of a blowing and suction tower, and a three-dimensional atomization field is formed; s301, controlling the volume flow ratio of gas to liquid in the absorption tower; s302, the high-pressure atomization nozzle is provided with a high-pressure pump set, and the high-pressure pump set can establish a dynamic pressure compensation model; and S303, monitoring the bromine concentration C in the finished liquid in real time through an online concentration meter, and adjusting the fresh water flow in real time according to the bromine concentration C in the finished liquid so as to control the bromine concentration in the finished liquid.

The present disclosure provides various characteristics for treating tail brine extracted from a bromine plant, when said brine contains residual bromine and chlorine with low pH and high ORP values that will be used in a lithium extraction production facility. The method conditions the extracted tail brine by adding either sodium hydroxide or ammonium hydroxide to bring its pH levels to between 5.5 and 6.5. The conditioned tail brine then gets pre-treated with hydrazine in either less than 70 ppm if used in combination with sodium hydroxide; or 195 ppm if used with ammonium hydroxide until the ORP levels have reached to below 100 mV. The extracted tail brine is then processed through DLE processing device having four groups of adsorption columns filled with lithium adsorption resins that, after treating the extracted tail brine, discharges the raw eluate solution to an effluent tail brine tank using an effluent tail brine pump connected to the DLE processing device.

The invention discloses a high-voltage-resistant brominated flame-retardant polyamide composition and a preparation method thereof, and belongs to the technical field of flame-retardant materials. The composition comprises the following components in percentage by mass: 30-80 wt% of aliphatic polyamide, 10-30 wt% of a brominated flame retardant, 0.5-10 wt% of an antimony-based synergist, 0.5-10 wt% of aromatic zinc carboxylate, 0.5-5 wt% of hydroxyapatite, 0.1-50 wt% of a reinforcing agent and 0-5 wt% of other auxiliaries, the sum of the contents of all the components is 100 wt%, and the raw material components are subjected to melt blending processing through a single-screw or double-screw extruder. The invention provides the high-voltage-resistant brominated flame-retardant polyamide composition, the relative tracking index (CTI) of the high-voltage-resistant brominated flame-retardant polyamide composition is greater than 400V, and the high-voltage-resistant brominated flame-retardant polyamide composition has high-level flame retardance and cost effect.

The invention discloses a method for removing bromine ions in a salt water body. The method comprises the steps of pretreatment before electrolytic oxidation, primary precise directional electrolysis, primary split-pole separated air real-time air stripping, secondary precise directional electrolysis, secondary split-pole separated air real-time air stripping, deep removal of bromine ions Br <-> by a reverse osmosis membrane, separation of bromine carrier airflow containing Br2 and the like. According to the method, the problems of environmental friendliness, economical efficiency, relatively good adaptability, directivity of a bromine ion Br <-> removal standard and how to deeply remove the bromine ion Br <-> in the prior art can be solved, and the Br <-> in the salt water body can be reduced to 10 ppm or below; the unit operation in the process path is basically conventional operation or universal operation, and has a good engineering feasibility foundation and an economic feasibility foundation.

The present invention relates to a coating for the surface of a household item comprising a decoration (a) that comprises a thermochromic pigment compound of formula BiOA1-xBx (I) where: - A and B are selected from the group consisting of iodine, fluorine, chlorine and bromine; A and B are different from one another; and - x is between 0 and 1, the decoration (a) being in the form of a layer that exhibits a reversible variation in its optical and / or colorimetric properties when the coating comprising it is subjected, in whole or in part, to a variation in temperature between a cold temperature and a hot temperature, the cold temperature being between 0°C and 40°C and the hot temperature being between 80°C and 400°C.

The present invention discloses a pyridone azo dye and a preparation method thereof, belonging to the field of fine chemical technology. The general structural formula of the pyridone azo dye is as follows: wherein X1, X2, X3, X4, and X5 are each independently selected from one of nitro, hydrogen, fluorine, chlorine, bromine, cyano, and substituted or unsubstituted phenyl; the R substituent is selected from one of the following structures: By introducing an R substituent at the N position of pyridone, the problem of low solubility of pyridone azo dye in organic solvents can be effectively solved. The solubility of the pyridone azo dye disclosed in the present invention in organic solvents is between 5-9 g / 100 mL, and the molar absorption coefficient of this type of dye is between 20,000-120,000 L·mol ‑1 cm ‑1 It has excellent light and heat stability within the range and is feasible for preparing optical devices and full-color high-stable display materials.

The invention discloses a treatment process for recycling associated resources of gas field water, and relates to the technical field of gas field water treatment. Adsorbing and extracting lithium from the pretreated gas field water, selectively adsorbing lithium ions in the gas field water by adopting a lithium adsorbent, and recycling lithium by using a generated desorption solution; the adsorption tail liquid after lithium extraction is subjected to hardness removal treatment, and divalent hardness ions in the gas field water are removed; evaporating the hardness-removed gas field water to separate out sodium, and cooling and crystallizing mother liquor subjected to sodium separation by evaporation to produce potassium chloride; and extracting bromine from the gas field water subjected to cooling crystallization treatment by adopting an electrooxidation process. Not only is efficient purification of the gas field water achieved, but also the effect of recycling associated resources of the gas field water is achieved in the purification process.

The invention provides a method for predicting the flammability upper limit volume percentage of a pure compound. The method can be used for predicting a mathematical model of the flammability upper limit volume percentage of the pure compound which is composed of 12 or less elements of hydrogen, carbon, nitrogen, oxygen, sulfur, fluorine, chlorine, bromine, iodine, silicon, phosphorus, arsenic and the like and has the atom number of 25 or less (excluding hydrogen) with high accuracy. Wherein the model is obtained as a universal quantitative structure-property relationship model by determining an optimal model from a plurality of multiple linear regression models by means of a step-by-step selection method, and the model takes some of the various molecular descriptors as independent variables, takes flammability upper limit volume percent as a dependent variable, and takes the flammability upper limit volume percent as a dependent variable. The value of the molecular descriptor included in the model can be received and input in a short time, and the flammability upper limit volume percentage can be output, so that only the specific value of the molecular descriptor included in the model is known. And the flammability upper limit volume percentage of the compound purely formed by the molecule can be predicted for any molecule meeting the requirements of the invention.

The invention belongs to the technical field of brominated flame retardant synthesis, and particularly provides a decabromodiphenyl ethane bromine distillation process chlorination bromine removal process, which comprises the following steps: S1, adding bromine into a reaction kettle, adding a catalyst, and mixing; cooling and dropwise adding molten diphenylethane; then heating, carrying out a heat preservation reaction, and cooling to obtain a brominated crude product; s2, S201, adding the brominated crude product obtained in S1 into a bromine steaming kettle, and heating; s202, chlorine is introduced, and the total amount of bromine and chlorine is detected; carrying out segmented control on the introduced chlorine according to the total amount of bromine and chlorine; s203, when the total amount of bromine and chlorine is reduced to a threshold value, stopping introducing chlorine, standing, cooling, and introducing nitrogen; s3, filtering the feed liquid in the bromine steaming kettle, washing and purifying for three times, and finally, centrifugally dewatering to obtain a faint yellow solid; and S4, adding the faint yellow solid into a high-temperature jet mill, performing high-temperature aging to obtain white powder, and then performing jet milling on the white powder to obtain a finished product. Physical distillation is replaced by chemical replacement, so that bromine is highly separated.

The utility model belongs to the field of chemical raw material recovery, and discloses a system for separating salt and extracting bromine from purified terephthalic acid membrane concentrated water. The system comprises a thermal decomposition device, a nanofiltration device, a static mixer and a bromine extraction rectification device. The utility model solves the technical problems that the acid consumption is large before bromine is extracted from purified terephthalic acid wastewater, and poisoning is easily caused by leakage hidden danger in the transportation and storage process of liquid chlorine.

The invention discloses a method for preparing brominated polystyrene, and belongs to the technical field of brominated polystyrene preparation. The method comprises: preparing a main chain bromination inhibitor, preparing a catalyst, and reacting; in the reaction, polystyrene and ethylene dichloride are mixed, stirred at 35-40°C for 30-40min under the protection of nitrogen, then cooled to 0-2°C, the main chain bromination inhibitor and the catalyst are added, stirred for 20-30min, and a dichloroethane solution of N-bromosuccinimide is added dropwise, and after the addition is completed, the mixture is stirred at room temperature for 1.5h, the reaction is terminated, and the mixture is washed with a sodium hydroxide aqueous solution, washed with water, and then filtered, and the filtrate is evaporated and crystallized, filtered, and vacuum dried to obtain brominated polystyrene; the brominated polystyrene prepared by the invention has good color performance and thermal stability, high bromine content, narrow molecular weight distribution, good reaction controllability, and short reaction time.

The invention belongs to the technical field of comprehensive utilization of seawater resources, and particularly relates to a green circulation method and system integrating seawater desalination and high-efficiency bromine extraction of concentrated seawater, and the system comprises a seawater desalination unit, a pretreatment unit, an oxidation replacement unit, a bromine elementary substance blowing-out unit, a bromine elementary substance absorption and enrichment unit and a bromine rectification and purification unit which are sequentially connected in series, the pipelines of the units are communicated to form a continuous material channel; the seawater desalination unit is used for producing fresh water and enriching concentrated seawater; the pretreatment unit removes impurities through a security filter and adjusts pH through an acidification pool; the oxidation replacement unit mixes chlorine and concentrated seawater through a gas-liquid mixer, and a bromine solution is generated in a reaction tank; the stripping tower realizes bromine gas stripping through atomization spraying, a filler area and a gas distributor; the absorption tower enriches bromine into hydrobromic acid by using a sulfur dioxide aqueous solution; the rectification unit is oxidized by a distillation tower, condensed and separated to obtain liquid bromine. The method realizes synchronous recovery of fresh water and bromine resources, conforms to a green circulation concept, and has remarkable economic and ecological benefits.

The invention relates to the field of bromine preparation, in particular to a vaporization process for preparing high-purity bromine, which comprises the steps of raw material pretreatment, oxidation reaction, gaseous bromine graded recovery, liquid phase residual bromine enhanced extraction, organic extraction separation and rectification purification. Bromine hydrolysis is inhibited by accurately controlling reaction conditions, and efficient gasification separation of bromine is realized by utilizing multi-stage condensation and segmented evaporation; tail gas is treated by a compound purification system to ensure that environmental protection reaches the standard; impurities are removed through the synergistic effect of extraction and rectification, and finally high-purity bromine is obtained. The process overcomes the defects of low yield and high energy consumption of the traditional method, has the advantages of high efficiency, energy conservation, environmental protection and the like, and is suitable for large-scale industrial application.

The invention relates to the technical field of seawater bromine extraction production, and discloses a seawater bromine extraction production line digital management method and system, and the method comprises the steps: collecting and integrating meteorological ocean data, raw material seawater real-time components, a process sensor network and equipment state data in real time, and forming a four-dimensional data set; constructing the four-dimensional data set into a graph structure, excavating a nonlinear coupling relationship among seawater characteristics, process parameters and equipment efficiency based on the graph structure, establishing a coupling analysis model, and pre-judging a fluctuation condition through the coupling analysis model; the condensation temperature and the tail gas bromine concentration are monitored in real time, and a multi-layer LSTM network model is adopted to predict the optimal value of the steam consumption; constructing a digital twinborn model of the production line, and simulating and predicting the production process in the digital twinborn body by using a model prediction control algorithm to obtain a predicted production result; when the deviation between the predicted production result and the actual production data exceeds a set threshold value, a DQN algorithm is adopted for intelligent regulation and control; according to the invention, the efficiency and precision of production management are improved.

Provided is a mathematical model that can predict, with high accuracy, the saturated liquid density of a pure compound at 298.15 K, said pure compound comprising 12 or less elements such as hydrogen, carbon, nitrogen, oxygen, sulfur, fluorine, chlorine, bromine, iodine, silicon, phosphorus, and arsenic and having 25 or less atoms (excluding hydrogen). The model is a quantitative structure-property relation model and is obtained by solving an optimal model from a plurality of multiple linear regression models by a step-by-step selection method, and the model takes some molecule descriptors in various molecule descriptors as independent variables, takes saturated liquid density under 298.15 K as a dependent variable, and takes the saturated liquid density under 298.15 K as a dependent variable. The value of the molecule descriptor included in the input model can be received in a short time, and the saturated liquid density at 298.15 K can be output, so that the saturated liquid density at 298.15 K of a compound formed by the molecule singly can be predicted for any molecule meeting the requirements of the invention as long as the specific value of the molecule descriptor included in the model is known.

The invention provides a bridged phosphine amine complex and a preparation method and application thereof, the complex has a structure as shown in a formula 1, R1-R4 are respectively and independently selected from hydrogen, chlorine, bromine and C1-Cn alkyl or alkoxy, n is greater than or equal to 1 and less than or equal to 4, and M is titanium or zirconium. The bridged phosphine amine complex provided by the invention has the characteristics of low water and oxygen sensitivity and good high temperature resistance.