27 results about "Tetrabromobisphenol A" patented technology

The application provides a pretreatment and detection method of tetrabromobisphenol A and ten common derivatives thereof in sludge, which comprises the following steps: (1) sample pretreatment: after mixing the frozen and dried sludge sample and the isotopic internal standard, oscillation extraction is carried out, and the extraction liquid is obtained after centrifugation by a centrifuge; the extraction liquid is purified by solid phase extraction to obtain a sample to be detected; (2) the sample to be detected obtained in the step (1) is detected by high performance liquid chromatography-tandem mass spectrometry; (3) the content of tetrabromobisphenol A and ten common derivatives thereof in the sample is calculated according to the internal standard method. The application provides a rapid and sensitive analysis and quantitative method of tetrabromobisphenol A and ten common derivatives thereof in sludge samples.

The present invention provides a flame retardant composition for foamed styrene resin, which can be used to produce a foamed molded body having excellent flame retardancy and heat resistance, a flame-retardant foamed styrene resin composition, and an extrusion-foamed molded body thereof. The flame retardant composition for foamed styrene resin of the present invention contains at least component (B1) tetrabromobisphenol A-bis(2,3-dibromo-2-methylpropyl ether), component (C) zinc fatty acid, and component (D) fatty acid metal salt (except for the (C) component), the content of the (C) component is 0.1 to 15 parts by mass per 100 parts by mass of the (B1) component, and the content of the (D) component is 1 to 35 parts by mass per 100 parts by mass of the (B1) component.

The invention discloses a nickel / copper-hexamercaptobenzene composite catalyst loaded with iron, nickel and palladium as well as a preparation method and application of the nickel / copper-hexamercaptobenzene composite catalyst. The catalyst takes nickel / copper-hexamercaptobenzene nanoparticles as a carrier and is loaded with active components of iron, nickel and palladium, and the preparation method comprises the following steps: synthesizing the carrier under an anaerobic condition, performing ultrasonic stripping, and loading Fe, Ni and Pd through chemical deposition in sequence under the protection of inert gas. Pd in the obtained catalyst is highly dispersed, Fe and Ni exist in a crystalline phase form, and the carrier is fully stripped and is rich in defects. The catalyst is used for degrading tetrabromobisphenol A in water, under the conditions that the pH is 3-5, the adding amount of the catalyst is 0.125 g / L and room-temperature ultrasonic assistance is carried out, the degradation rate of 98% or above can be achieved for a TBBPA solution with the initial concentration smaller than or equal to 10 mg / L within 20 min, and the catalyst has the advantages of being efficient and rapid.

The invention relates to the technical field of waste recycling, in particular to a harmless treatment and resource recycling method for bromine in bromine-containing waste, which comprises the following steps: putting the bromine-containing waste into a reaction solution, and heating for reaction to obtain debrominated waste and filtrate containing bromine ions; the reaction liquid comprises an alkaline substance, a copper compound precursor, a ligand and a solvent; the ligand is selected from at least one of a bidentate ligand containing two nitrogen sites, a polydentate ligand containing two nitrogen sites, a bidentate ligand containing two oxygen sites, a polydentate ligand containing two oxygen sites, a bidentate ligand containing one nitrogen and one oxygen site and a polydentate ligand containing one nitrogen and one oxygen site; the temperature of the heating reaction is not higher than 150 DEG C. The invention solves the problems of environmental pollution and bromine resource waste caused by organic bromine pollutants (such as highly toxic brominated dioxin) due to landfill, incineration and other traditional treatments after the brominated flame retardant (such as tetrabromobisphenol A, polybrominated diphenyl ether and the like)-containing plastic or resin is abandoned.

The invention provides porous carbon, a silicon-carbon negative electrode material and a preparation method thereof, and the preparation method of the porous carbon comprises the following steps: providing a mixture comprising first resin, a flame retardant and a defoaming agent, dissolving the mixture in a first organic solvent, and carrying out spray drying to prepare a granular precursor, the flame retardant comprises at least one of decabromodiphenyl ethane, decabromodiphenyl ether, octabromodiphenyl ether, pentabromodiphenyl ether, tetrabromobisphenol A and hexabromocyclododecane, and at least one of decabromodiphenyl ether, octabromodiphenyl ether, pentabromodiphenyl ether, tetrabromobisphenol A and hexabromocyclododecane; carrying out carbonization treatment on the granular precursor to form a carbonization treatment product; and carrying out activating treatment on the carbonization treatment product to form the porous carbon.

The utility model discloses a tower for recycling a tetrabromobisphenol A wastewater solvent, and belongs to the technical field of tetrabromobisphenol A. The tower for recycling the tetrabromobisphenol A wastewater solvent comprises a flash tower body, the flash tower body comprises an upper tower body, a middle tower body and a lower tower body, one side of the upper tower body is communicated with a feeding pipe, and the other side of the upper tower body is communicated with a discharging pipe. A spraying part is mounted at the bottom end of the feeding pipe, the middle tower body is provided with a filler layer, and a circulating part is mounted at the bottom end of the lower tower body. According to the device, the contact area of wastewater and the filler layer is increased through the spraying part, so that the wastewater is more uniformly contacted with the filler layer, the heat transfer effect is enhanced, the heat utilization rate is further improved, the steam consumption is reduced, the energy utilization efficiency of the whole process is improved, and continuous feeding and discharging can be realized during working through cooperation of the circulating part; the automation degree is high, the use amount of energy is reduced, and the cost is reduced.

The invention discloses a preparation method of octabromo-ether, and belongs to the technical field of flame retardants, the preparation method comprises the following steps: synthesizing tetrabromobisphenol A, synthesizing tetrabromobisphenol A diallyl ether, and synthesizing tetrabromobisphenol A bis (2, 3-dibromopropyl) ether; the synthesis of tetrabromobisphenol A diallyl ether comprises the following steps: mixing tetrabromobisphenol A, methanol and a first part of deionized water, heating to 50-55 DEG C, stirring and refluxing until the tetrabromobisphenol A, methanol and the first part of deionized water are completely dissolved, adding sodium hydroxide, stirring and refluxing, adding a catalyst, stirring and refluxing, dropwise adding 3-chloropropene, then continuing stirring and refluxing, distilling out all methanol, and cooling to room temperature to obtain the tetrabromobisphenol A diallyl ether. Mixing with a second part of deionized water and dichloromethane, stirring at room temperature, standing, taking an organic layer, centrifuging, taking supernate, washing with deionized water, distilling out all dichloromethane, and drying; the prepared octabromo-ether is high in purity and yield and good in appearance performance, the condensation problem of the obtained octabromo-ether is avoided, and the yield is stable.

This invention relates to the field of environmental pollutant detection, specifically to the application of organosilicon nanodots and their hydrogel sensors in the detection of tetrabromobisphenol A (TBA) concentration. The method includes: uniformly mixing an organosilicon nanodot stock solution with a sample to be tested, allowing it to stand in the dark to obtain a test solution; acquiring the sample fluorescence intensity value of the test solution at a specific wavelength, and the control fluorescence intensity value of a blank control solution without the test sample; calculating the quenching efficiency based on the sample fluorescence intensity value and the control fluorescence intensity value; and calculating the TBA concentration of the sample to be tested based on the quenching efficiency and a standard working curve; wherein the standard working curve is obtained by fitting the concentration of a TBA standard solution and its corresponding quenching efficiency. This invention aims to provide a simple, efficient, environmentally friendly, highly sensitive, and highly selective method for detecting TBA concentration.

The present invention provides a flame-retardant resin composition which is excellent in flame retardancy and heat resistance and is less likely to cause blooming. The present invention relates to a flame-retardant polypropylene resin composition characterized by comprising: (A) a polypropylene resin: 100 parts by weight; (B) a mixture of specific bisphenol S derivatives: 2 to 50 parts by weight; (C) at least one of (c1) tetrabromobisphenol A bis(2,3-dibromopropyl) ether and (c2) tris(2,3-dibromopropyl) isocyanurate: 0.2 to 20 parts by weight; and (D) at least one of antimony trioxide, antimony pentoxide, zinc molybdate, boron trioxide and zinc borate: 1 to 20 parts by weight.

The present application relates to the technical field of automatic control of chemical separation equipment, and particularly relates to an automatic control method for a high-cycle batch four-bromine bisphenol A centrifugal separation process. Data in a feed pipe is collected, corresponding control signals are output until filter cake load feedback data reaches a set threshold value; feed parameters are collected, a dynamic dewatering control algorithm is used to control mother liquor turbidity to be lower than a set threshold value; material liquid temperature and mother liquor turbidity data are collected, two control signals are formed by an intelligent spraying control algorithm, and are output to two gradient spraying pumps; a constant maximum speed control signal is output to a centrifuge main motor driver, filter cake humidity feedback is collected, and when humidity feedback data reaches a set drying target value, a discharge instruction is output and the control process is completed. The present application collects multi-dimensional data of material state and separation effect in real time through an online sensor network, and achieves the technical effect that even if feed conditions fluctuate, the excellent stability of batch product quality can be ensured.

This application relates to a high-melting-point, high-whiteness methyl octabromoether flame retardant composition and its preparation method, belonging to the fields of fine chemicals and flame retardant preparation technology. The method includes: etherifying tetrabromobisphenol A, sodium hydroxide, and allyl chloride; purifying the mixture by isothermal crystallization at 30–50°C to obtain a tetrabromoether intermediate; dissolving the intermediate in dichloromethane and reacting it with bromine at 10–40°C; and finally, obtaining the finished product through post-treatment. This invention effectively removes impurities such as monoethers through a specific intermediate crystallization process, and avoids overheating and oxidation side reactions by combining low-temperature bromination and optimized solvent ratios. The obtained flame retardant has a melting point ≥106°C, whiteness R457 ≥92, and bromine content ≥67%, exhibiting advantages such as good thermal stability, low volatility, and high purity. The process conditions are mild and suitable for industrial production.

The invention discloses an environment-friendly two-component polyurethane pouring sealant and a preparation method thereof. The two-component polyurethane pouring sealant comprises a component A and a component B, the component A is prepared by compounding the following raw materials: polyether polyol, a macromolecular reaction type brominated flame retardant, a defoaming agent, black paste and a catalyst; and the component B is prepared by compounding the following raw materials: isocyanate, an isocyanate-terminated polyether polyol prepolymer and a defoaming agent. According to the environment-friendly double-component polyurethane pouring sealant, the macromolecular hydroxyl-containing reactive liquid brominated flame retardant is added, so that on one hand, the viscosity, the density and the hardness of the polyurethane pouring sealant are greatly reduced, and a pouring process and light weight are facilitated; on the other hand, the flame retardant can have good compatibility with polyether polyol in the component A, migration and precipitation of tetrabromobisphenol A are reduced after the flame retardant reacts with isocyanate in the component B, toxicity is reduced, environment friendliness is improved, and the flame retardance of the flame retardant is not reduced.

The invention relates to the field of environmental pollutant detection, in particular to application of organic silicon nanodots and a hydrogel sensor thereof in tetrabromobisphenol A concentration detection. Comprising the following steps: uniformly mixing an organic silicon nanodot stock solution with a to-be-detected sample, and standing in a dark place to obtain a to-be-detected solution; acquiring a sample fluorescence intensity value of the to-be-detected solution under a specific wavelength and a control fluorescence intensity value of a blank control solution which does not contain the to-be-detected sample; calculating a quenching efficiency based on the sample fluorescence intensity value and the control fluorescence intensity value; based on the quenching efficiency and a standard working curve, calculating the tetrabromobisphenol A concentration of the sample to be detected; wherein the standard working curve is obtained by fitting the concentration of the tetrabromobisphenol A standard solution and the corresponding quenching efficiency of the tetrabromobisphenol A standard solution. The invention aims to provide the tetrabromobisphenol A concentration detection method which is simple in process, efficient, environment-friendly, high in detection sensitivity and high in selectivity.

The application belongs to the technical field of flame retardants, and particularly relates to a surface modified bromide flame retardant and a preparation method thereof. The surface modified bromide flame retardant is prepared by using tetrabromobisphenol A glycidyl ether and 2,7-dihydroxynaphthalene as raw materials, and reacting under the action of a catalyst benzyltriphenylphosphonium bromide to obtain a high molecular weight brominated epoxy resin flame retardant. Then, the high molecular weight brominated epoxy resin flame retardant is modified and grafted by using cyclotriphosphazene modifier to obtain a surface modified high molecular weight brominated epoxy resin flame retardant. The high molecular weight brominated epoxy resin flame retardant is synthesized by using tetrabromobisphenol A glycidyl ether and 2,7-dihydroxynaphthalene, the naphthalene group introduced can greatly improve the thermal stability of the flame retardant, meanwhile, the high molecular weight brominated epoxy resin flame retardant is surface grafted and modified by using cyclotriphosphazene modifier, the cyclotriphosphazene with high efficient charring capacity is introduced, and the carbon layer produced in the process of playing the flame retardant role can improve the smoke problem of the brominated epoxy resin flame retardant.

The application discloses a method for analyzing multiple halogenated phenols based on hydrogen bond enhanced halogen bond recognition, which mainly comprises the following steps: constructing a selective recognition surface enhanced Raman substrate, selectively capturing target molecules, collecting signals and extracting chemical characteristics, embedding physical / chemical prior knowledge into machine learning multi-component decoupling, and the like. The application overcomes the interference of complex matrix in water, realizes selective capture, breaks through the black box limitation of traditional pure data driven model, constructs a physical information guided machine learning model, and realizes the detection of multiple halogenated phenols. The application can be used for selectively capturing halogenated phenol persistent organic pollutants (such as trichlorophenol, tribromophenol, tetrabromobisphenol A and the like) in a water phase environment containing background inorganic salt or non-halogenated aromatic organic matter interference, and realizes the qualitative screening of target pollutants in combination with a surface enhanced Raman spectroscopy technology.

The invention provides a method for selectively extracting lithium from a waste ternary positive electrode material, which comprises the following steps of: (1) roasting the waste ternary positive electrode material for the first time to obtain a pretreated material; (2) the pretreated material in the step (1) is subjected to first ball milling in a first composite ball milling agent and a tetrabromobisphenol A bis (2, 3-dibromopropyl) ether solution, a first ball-milled material is obtained, and the first composite ball milling agent comprises Na2S2O3, sodium bicarbonate and trisodium citrate; (3) carrying out second ball milling on the first ball-milled material in the step (2) to obtain a second ball-milled material; and (4) sequentially carrying out acid leaching and solid-liquid separation on the second ball-milled material in the step (3) to obtain a lithium-containing solution and nickel-cobalt-manganese-containing solid-phase slag. The leaching rate and selectivity of lithium can be improved, and the application prospect is wide.

The application provides a high-heat-resistant flame-retardant polyurethane resin and a preparation method thereof. The resin comprises a flame-retardant polymer, wherein the flame-retardant polymer is copolymerized from a tetrabromobisphenol A diallyl ether (TBPA) monomer and a 2-vinyl-4,6-diamino-1,3,5-triazine (VDT) monomer, and the resin further comprises isocyanate, a polythiol compound and the like. The polyurethane resin material of the application not only has the flame-retardant property, and the limiting oxygen index (LOI) value can reach 32, but also improves the glass transition temperature of the resin.

The invention belongs to the technical field of chemical purification, and particularly relates to a tetrabromobisphenol A purification device and method. The purification device comprises a crystallization reaction kettle, the crystallization reaction kettle comprises a kettle body and a push type stirring assembly located in the kettle body, and an inner cavity of the kettle body is divided into an upper-layer mixing area and a lower-layer crystallization area through a horizontally-arranged flow dividing partition plate; a second jacket is arranged on the outer wall of the mixing area, a first jacket is arranged on the outer wall of the crystallization area, an inner cylinder is arranged in the middle of the crystallization area, a second medium inlet and a second medium outlet which are respectively communicated with the inner cylinder are formed in one side of the kettle body, a nucleation area is formed in the inner cavity space of the inner cylinder, and a growth area is formed between the outer wall of the inner cylinder and the inner wall of the kettle body. According to the purification route, efficient purification of tetrabromobisphenol A is achieved through cooperation of solvent gradient extraction and gradient temperature control, and the method has both environmental protection property and economical efficiency and is suitable for industrial production.

A method for removing bromine from copper powder resource recycling products and a method for manufacturing regenerated copper, wherein the method for removing bromine from copper powder resource recycling products comprises the following steps: obtaining a copper powder resource recycling product comprising brominated flame retardants; performing a thermal cracking process on the copper powder resource recycling product at a process temperature and a process time, so that the copper powder resource recycling product is heated to generate exhaust gas generated from the brominated flame retardants; and performing a chemical reaction between a mixed catalyst and the exhaust gas, wherein the mixed catalyst comprises an iron-containing catalyst and a calcium-containing catalyst. In this way, hydrogen bromide and tetrabromobisphenol A can be removed simultaneously.

The invention relates to the technical field of cables, and provides a high-flame-retardant power cable which sequentially comprises a conductor, an insulating layer, a protective layer and a sheath layer from inside to outside. The sheath layer comprises the following components in parts by mass: 85-90 parts of polyethylene, 10-15 parts of maleic anhydride grafted polyethylene, 5-10 parts of a phospholipid polyethylene glycol polylactic acid-glycolic acid copolymer, 10-20 parts of tetrabromobisphenol A, 30-40 parts of an inorganic flame retardant and 2-5 parts of a processing aid. According to the technical scheme, the problem of poor flame retardance of the power cable in the prior art is solved.

The invention belongs to the field of wastewater treatment and resource utilization, and discloses a bromine extraction system and method for brominated flame retardant washing wastewater. In the system, a bromine washing wastewater storage tank is connected with a water inlet of a raw water tank of a nanofiltration device, a nanofiltration produced water outlet of the nanofiltration device is connected with a water inlet of a raw water tank of a first reverse osmosis device, a concentrated water outlet of the first reverse osmosis device is connected with an inlet of a feeding pump of an MVR evaporator device, and a mother liquor outlet of the MVR evaporator device is connected with an inlet of a rich bromine storage tank; a pipeline connected with an outlet of the rich bromine storage tank and an acid adding pipeline are converged and then are connected with a middle water inlet of the ozone oxidation tower through a mixer, a lower water outlet of the ozone oxidation tower is connected with a middle-upper feed port of the distillation tower, and a top recovery port of the distillation tower is connected with an inlet of the bromine storage tank. According to the method, the resource recycling of the bromide ions in the washing wastewater in the production of the tetrabromobisphenol A can be realized.

The present invention relates to an insulating flame-retardant automatically fire-extinguishing patch and a preparation method therefor. The insulating flame-retardant fire-extinguishing patch comprises a bottom film, an adhesive layer and an insulating flame-retardant layer, wherein the insulating flame-retardant layer comprises: 20-60 parts of perfluoro-2-methyl-3-pentanone microcapsules, 20-30 parts of polydimethylsiloxane, 0.1-5 parts of magnesium hydroxide, 0.1-5 parts of triphenyl phosphate, 0.5-5 parts of tributyl phosphate, 0.1-5 parts of tris(2-ethylhexyl)phosphate, 0.2-5 parts of tris(2,3-dichloropropyl)phosphate, 0.2-5 parts of a tetrabromobisphenol A epoxy resin, 0.5-3 parts of antimony trioxide, 0.1-5 parts of a borate, 0.1-5 parts of dibromochloromethane, and 0.1-5 parts of trichlorobromomethane. The insulating flame-retardant fire-extinguishing patch of the present invention is easy to install, does not require maintenance, actively extinguishes a fire in the incipient stage, can achieve the effect of repeated fire extinguishing and effectively prevent reignition and fire expansion, and is safe, green and environmentally friendly.

The invention discloses a preparation method of end-capped brominated epoxy resin, which comprises the following steps: carrying out polymerization reaction on tetrabromobisphenol A and tetrabromobisphenol A diglycidyl ether to obtain tetrabromobisphenol A type resin of which the terminal group is phenolic hydroxyl group, adding 2, 4, 6-tetrabromobisphenol A type resin, and reacting to obtain the end-capped brominated epoxy resin. And carrying out end capping on tetrabromobisphenol A type resin of which the terminal group is phenolic hydroxyl group by using 2, 3, 6-tribromophenol glycidyl ether to prepare the end-capped brominated epoxy resin. The preparation method of the end-capped brominated epoxy resin provided by the invention is simple in process, and the product is good in thermal stability and high in bromine content and has good industrial popularization and application values.

The application discloses a PBT / brominated PC alloy which comprises the following components in parts by weight: PBT 40-50 parts; brominated PC 30-40 parts; anti-ultraviolet agent 2-10 parts; toughening agent 10-15 parts; anti-dripping agent 0.2-0.5 parts; the viscosity average molecular weight of the brominated PC ranges from 13000 to 80000, and the molar ratio of bisphenol A to tetrabromobisphenol A is (80-40):(20-60); the anti-ultraviolet agent is selected from a copolymer of styrene-N-phenyl maleimide and maleic anhydride. The application has the advantages of good UV resistance and V-0 flame retardance by selecting the brominated PC with specific parameters and the anti-ultraviolet agent.

The invention relates to the field of solvent recovery, in particular to a solvent recovery device for preparing tetrabromobisphenol A. The solvent recovery device comprises a bromination unit, an adsorption unit, a neutralization unit and a post-treatment unit which are sequentially connected in series through pipelines. The bromination unit adopts a multi-chamber reactor, a heating pipe, a partition plate and a flow turning plate are arranged in the bromination unit, intelligent regulation and control of the bromine adding amount and reflux of an incomplete reaction solvent are achieved through sampling detection and a three-way valve, low brominated bisphenol A is converted into tetrabrominated bisphenol A, and crystals are collected and separated out. The adsorption unit is provided with a modular adsorption part which can be conveniently replaced, and impurities are removed by using adsorbents such as activated carbon and the like. And the neutralization unit is used for realizing neutralization of residual bromine and acidic substances through injection and stirring of alkali liquor. The space of the post-treatment unit is divided by a guide plate, washing, efficient layering, interface water phase extraction and adsorption drying are performed in sequence, and finally the pure chlorobenzene solvent is obtained. According to the invention, efficient and continuous recovery of the chlorobenzene solvent is realized, the process is simplified, and the resource utilization rate is improved.

The present application relates to the field of solvent recovery, and particularly relates to a solvent recovery device for preparing tetrabromobisphenol A, comprising a bromination unit, an adsorption unit, a neutralization unit and a post-treatment unit connected in series through pipelines. The bromination unit adopts a multi-chamber reactor, which is internally provided with heating pipes, partitions and turnover plates. The intelligent control of bromine addition amount and the reflux of incomplete reaction solvent are realized through sampling detection and a three-way valve. Low brominated bisphenol A is converted into tetrabromobisphenol A, and the crystal is collected. The adsorption unit is provided with a modular adsorption part which can be conveniently replaced. Activated carbon and other adsorbents are used to remove impurities. The neutralization unit realizes the neutralization of residual bromine and acidic substances through alkali injection and stirring. The post-treatment unit separates the space by using a flow guide plate, and then carries out water washing, efficient layering and interface water phase extraction, adsorption drying, and finally obtains pure chlorobenzene solvent. The present application realizes the efficient and continuous recovery of chlorobenzene solvent, simplifies the process, and improves the resource utilization rate.

The invention provides a composite catalyst and application thereof in treatment of wastewater containing tetrabromobisphenol A, and belongs to the technical field of wastewater treatment. The composite catalyst comprises a cobalt-nitrogen doped porous carbon catalyst and persulfate. Cobalt and nitrogen in the cobalt-nitrogen-doped porous carbon catalyst interact to generate a cobalt-nitrogen chemical bond, and the cobalt-nitrogen chemical bond is activated by persulfate to obtain a tetravalent cobalt oxygen species, so that the catalytic activity of the composite catalyst is improved, and tetrabromobisphenol A can be efficiently degraded when the composite catalyst is subsequently used in wastewater.