74 results about "Tetrabromobisphenol A" patented technology

The invention belongs to the technical field of polyurethane, and particularly relates to a low-reaction-heat mine reinforcing material and a preparation method thereof. Comprising a component A and a component B, the component A comprises polyether polyol A, polyether polyol B, a flame retardant and a catalyst; the polyether polyol A takes a bisphenol compound and sorbitol as a mixed initiator; the polyether polyol B takes cane sugar and sorbitol as a mixed initiator; the component B comprises a prepolymer, a flame retardant and a viscosity reducer; the prepolymer is prepared by prepolymerizing polymerized MDI (Diphenyl Diisocyanate) and polyether polyol C; and the polyether polyol C takes tetrabromobisphenol A and dihydric alcohol as a mixed initiator. The bisphenol compound polyether polyol A and the high-functionality polyether polyol B which are used as specific initiators are mixed, so that the reaction heat is reduced, and the strength of the reinforcing material is improved; meanwhile, polyether polyol C starting from tetrabromobisphenol A is used, so that the flame retardance, the toughness and the strength of the prepolymer are enhanced; the prepared reinforcing material is high in compressive strength and low in reaction heat.

The invention discloses a flame-retardant PBT (Polybutylece Terephthalate) / brominated polycarbonate composition, which comprises the following components in parts by weight: 40-60 parts of PBT; 30 to 50 parts of brominated polycarbonate; 0.2 to 0.5 part of an anti-dripping agent; 10 to 15 parts of a glycidyl methacrylate grafted toughening agent; the viscosity average molecular weight of the brominated PC ranges from 13000 to 30000, and the molar ratio of the bisphenol A to the tetrabromobisphenol A is (55 to 40) to (45 to 60). The brominated polycarbonate with specific parameters is selected and cooperated with the glycidyl methacrylate grafted toughening agent, so that the flame retardance of V-0 can be realized, and the advantages of high low-temperature toughness (notch impact property tested at-30 DEG C) and low shrinkage after baking can also be realized.

The invention relates to the technical field of flame-retardant ABS (Acrylonitrile Butadiene Styrene) materials, in particular to an ABS composite material with good flame retardance and a preparation method thereof. The ABS composite material disclosed by the invention is prepared from the following raw materials in parts by weight: 80 to 100 parts of ABS, 15 to 18 parts of tetrabromobisphenol A, 3 to 5 parts of a synergistic flame retardant and 0.1 to 0.5 part of an antioxidant, the synergistic flame retardant is obtained by grafting ferroferric oxide on the surface of expandable graphite and then coating phytic acid; the ABS composite material disclosed by the invention has excellent flame-retardant capability and also has relatively good tensile strength and impact strength, and the problem that the mechanical strength of a traditional flame-retardant ASB material is greatly reduced due to the addition of a flame retardant is avoided.

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 invention discloses an acinetobacter LYS-5 for degrading tetrabromobisphenol A and application thereof, relates to the field of microorganisms, and aims to solve the problem that tetrabromobisphenol A pollution in saline-alkali soil is difficult to repair by existing microorganisms. The acinetobacter is Acinetobacter pitefer LYS-5, and is preserved in China General Microbiological Culture Collection Center (CGMCC), the preservation address is No.3, No.1 yard, Beichen West Road, Chaoyang District, Beijing, the preservation date is April 22, 2024, and the preservation number is CGMCC No.30399. The invention further discloses a preparation method of the Acinetobacter pitefer LYS-5, and the acinetobacter pitefer LYS-5 has the advantages that the acinetobacter pitefer LYS-5 can be used for preparing the acinetobacter pitefer LYS-5; the method is used for degrading the pollutant tetrabromobisphenol A in a water body and saline-alkali soil.

The invention relates to an insulating flame-retardant automatic fire extinguishing paste and a preparation method thereof. The insulating flame-retardant fire extinguishing patch comprises a bottom film, an adhesive layer and an insulating flame-retardant layer, the insulating flame-retardant layer is prepared from the following components in parts by weight: 20 to 60 parts of perfluoro-2-methyl-3-pentanone microcapsules, 20 to 30 parts of polydimethylsiloxane, 0.1 to 5 parts of magnesium hydroxide, 0.1 to 5 parts of triphenyl phosphate, 0.5 to 5 parts of tributyl phosphate, 0.1 to 5 parts of tris (2-ethylhexyl) phosphate, 0.2 to 5 parts of tris (2, 3-dichloropropyl) phosphate, 0.2 to 5 parts of tetrabromobisphenol A epoxy resin, 0.5 to 3 parts of antimony trioxide and 0.1 to 5 parts of borate. 0.1 to 5 parts of dichlorobromomethane and 0.1 to 5 parts of trichlorobromomethane. The insulating flame-retardant fire extinguishing paste is easy to install, does not need maintenance, actively extinguishes fire when a fire occurs in the initial stage, can achieve the effect of multiple times of fire extinguishing, can effectively prevent reburning and fire expansion, and is safe, green and environmentally friendly.

The application provides a catalyst for catalytic wet oxidation of tetrabromobisphenol A wastewater, a preparation method and application thereof, and belongs to the technical field of wastewater treatment. The catalyst comprises a main metal oxide and a crystal lattice adjusting metal oxide; the main metal oxide comprises one or more of MnO2, Co3O4, NiO or MoO3, and the crystal lattice adjusting metal oxide comprises an oxide of Ce and / or an oxide of La. The preparation method comprises the following steps: adding main metal salt, crystal lattice adjusting metal salt and citric acid into water, evaporating and concentrating, drying, first calcining, adding sodium hydroxide into water to perform a closed pressurized reaction, washing and drying, second calcining, placing into a nitric acid solution, heat treatment, washing and drying, placing into water with hydrogen peroxide and acetic acid to perform a heat reaction, filtering and drying, and obtaining the catalyst. The catalyst introduces a large number of oxygen defects through a mode of "lattice doping - partial metal removal - lattice distortion", so that the catalyst has a large oxygen storage capacity, can activate the C-Br bond, and can efficiently catalyze the oxidation of tetrabromobisphenol A wastewater.

The invention discloses a loofah sponge loaded nanoscale zero-valent iron material, a preparation method and application of the loofah sponge loaded nanoscale zero-valent iron material in degradation of tetrabromobisphenol A. The preparation method comprises the steps that 1, loofah sponge is treated with alkali liquor, the treated loofah sponge is placed in a mixed solution of hydrogen peroxide and acetic acid, heating stirring, washing and drying are conducted, and pretreatment is completed; (2) placing the pretreated loofah sponge in a metal ion solution in an oxygen isolation environment, performing ultrasonic treatment and stirring, and further performing vacuum impregnation; the metal ions comprise iron ions or ferrous ions; and (3) in an oxygen isolation environment, putting the loofah sponge obtained in the step (2) into a reducing agent solution, stirring and reacting until no bubbles are generated, and washing and drying to obtain the loofah sponge loaded nano zero-valent iron material. The method disclosed by the invention is simple in steps and mild in conditions, and the prepared loofah sponge loaded nano zero-valent iron material is large in specific surface area and good in reusability, and has a wide application prospect in the aspect of degrading tetrabromobisphenol A.

The invention relates to the technical field of flame-retardant resin synthesis, in particular to a preparation method of tetrabromobisphenol A diglycidyl ether, which comprises the following steps: under the action of a catalyst, carrying out ring-opening reaction on tetrabromobisphenol A and an epoxy group of epoxy chloropropane to generate a compound of which the end group is chlorohydrin ether, then removing HCl from the chlorohydrin ether, and carrying out ring-closing reaction to obtain the tetrabromobisphenol A diglycidyl ether. According to the technical scheme, the using amount of epoxy chloropropane and tetrabromobisphenol A is 1.02-1.25 times of the theoretical value, the using amount of epoxy chloropropane and generation of by-products are greatly reduced, and the high-purity and high-yield tetrabromobisphenol A diglycidyl ether monomer can be obtained.

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 application provides a method for recovering tribromophenol, tetrabromobisphenol A and dibromophenol from bromine-containing solid waste by melting crystallization, and relates to the field of solid waste recovery. The method comprises the following steps: mixing bromine-containing solid waste, a solvent and a catalyst to perform a reaction, then performing liquid-liquid separation to obtain a bromine-containing organic phase and salt-containing wastewater; recovering the solvent in the bromine-containing organic phase to obtain a bromine-containing organic mixture; preheating the bromine-containing organic mixture, then performing melting, cooling, sweating and melting treatment to obtain crude tribromophenol and crude tetrabromobisphenol A; performing vacuum rectification on the crude tribromophenol to obtain dibromophenol and a column still product; performing recrystallization, solid-liquid separation, water washing and drying on the column still product to obtain tribromophenol; and performing recrystallization, solid-liquid separation, alkali washing and drying on the crude tetrabromobisphenol A to obtain tetrabromobisphenol A. The method provided in the application adopts reaction impurity removal and melting crystallization and is coupled with a recrystallization process, so that tribromophenol, tetrabromobisphenol A and dibromophenol products can be obtained at the same time, the process is simple, and the energy consumption is significantly reduced compared with the traditional method.

The present invention discloses a multi-element-doped binary composite carbon material, its preparation method, and application, belonging to the technical field of electromagnetic wave absorbing material preparation. The preparation method of the binary composite carbon material comprises the following steps: 2-hydroxy-4-methoxy-5-sulfonic acid benzophenone and N-hydroxymethyl acrylamide are alkylated to prepare a sulfonic acid functional monomer; tetrabromobisphenol A, methacrylic anhydride, and p-toluenesulfonic acid are esterified to prepare a bromine functional monomer; the sulfonic acid functional monomer and the bromine functional monomer are subjected to free radical polymerization to prepare a binary polymer; and finally, the binary polymer is carbonized. The multi-element-doped binary composite carbon material prepared by the preparation method of the present invention has a minimum reflection loss of 55.25dB in the 2-18 GHz frequency band, providing a new approach to solving the bottleneck problems of existing absorbing materials, such as a single loss mechanism, weak attenuation capability, and complex preparation process.

The invention discloses a multi-element doped binary composite carbon material as well as a preparation method and application thereof, and belongs to the technical field of preparation of electromagnetic wave absorbing materials. Comprising the following steps: carrying out an alkylation reaction on 2-hydroxy-4-methoxy-5-sulfonic benzophenone and N-hydroxymethyl acrylamide to prepare a sulfonic functional monomer; the preparation method comprises the following steps: carrying out esterification reaction on tetrabromobisphenol A, methacrylic anhydride and p-benzene methanesulfonic acid to prepare a bromo functional monomer; the sulfonic functional monomer and the bromo functional monomer are subjected to free radical polymerization reaction to prepare a binary polymer; and finally, carbonizing the binary polymer. The minimum reflection loss of the multi-element doped binary composite carbon material prepared by the preparation method disclosed by the invention in the frequency band of 2-18 GHz reaches-55.25 dB, and a new idea is provided for solving the bottleneck problems of single loss mechanism, weak attenuation capability, complex preparation process and the like of the existing wave-absorbing material.

The present invention belongs to the technical field of organic synthesis, and specifically relates to an ultra-high molecular weight methyl bromide epoxy resin, a preparation method thereof, and an application thereof. The preparation method provided by the present invention has simple steps, is easy to operate, and is convenient for industrial production. The ultra-high molecular weight methyl bromide epoxy resin obtained can be used for the modification of resins such as PBT and PET, and has good miscibility with other resins. Compared with the traditional high molecular weight brominated epoxy resin synthesized with epichlorohydrin and tetrabromobisphenol A, the ultra-high molecular weight methyl bromide epoxy resin provided by the present invention has good miscibility with other resins, better UV resistance and weather resistance, good mechanical and electrical properties, a melting point between 147 and 153°C, excellent physical and chemical properties, and a wider range of applications. The ultra-high molecular weight methyl bromide epoxy resin provided by the present invention is particularly suitable for the modification of PBT, PET, or flame-retardant hair. The amount used in flame-retardant hair is reduced by more than 20%, with significant economic benefits and further improved product quality.

The invention provides a method for recovering tribromophenol, tetrabromobisphenol A and dibromophenol in bromine-containing solid waste through melt crystallization, and relates to the field of solid waste recovery. The method comprises the following steps: mixing the bromine-containing solid waste, a solvent and a catalyst for reaction, and then carrying out liquid-liquid separation to obtain a bromine-containing organic phase and salt-containing wastewater; recovering the bromine-containing organic phase solvent to obtain a bromine-containing organic mixture; preheating the bromine-containing organic mixture, melting, cooling, sweating and melting to obtain a tribromophenol crude product and a tetrabromobisphenol A crude product; carrying out reduced pressure rectification on the tribromophenol crude product to obtain a dibromophenol product and a tower kettle product, and carrying out recrystallization, solid-liquid separation, washing and drying on the tower kettle product to obtain a tribromophenol product; and carrying out recrystallization, solid-liquid separation, alkali washing and drying on the crude tetrabromobisphenol A product to obtain the tetrabromobisphenol A product. According to the method, reaction impurity removal, melt crystallization and recrystallization are coupled, tribromophenol, tetrabromobisphenol A and dibromophenol products are obtained at the same time, the process is simple, and energy consumption is remarkably reduced compared with traditional methods.

The utility model discloses a synthesis device of tetrabromobisphenol A, and relates to the technical field of tetrabromobisphenol A. An inlet of a reaction kettle is respectively communicated with a bisphenol A tank, a dichloromethane tank, an intermediate tank and a hydrochloric acid tank through pipelines, and an inlet of the intermediate tank is respectively communicated with a sodium bromide tank, a sodium bromate tank and a purified water tank through pipelines; an outlet of the reaction kettle is communicated with a liquid separation tank through a pipeline, an outlet of the liquid separation tank is respectively communicated with a water phase tank and an organic phase tank through pipelines, an outlet of the organic phase tank is communicated with a distillation tank through a pipeline, a gas phase outlet of the distillation tank is communicated with a dichloromethane recovery tank through a pipeline, and a liquid phase outlet of the distillation tank is communicated with a filter through a pipeline. A solid-phase outlet of the filter is communicated with a dryer; an outlet of the dryer is communicated with a finished product tank. The reaction process is mild and easy to control, bromine does not need to be used as a raw material, hidden dangers of storage and transportation are eliminated, and the safety is higher.

The invention relates to the technical field of resin processing and preparation, and discloses bromine-containing epoxy resin for an insulating plate, a preparation method of the bromine-containing epoxy resin and a preparation method of the insulating plate. The molar ratio of the epoxy chloropropane to the tetrabromobisphenol A is controlled to be 1: (0.46-0.54), and the mass of the organic solvent is controlled to be 21%-30% of the mass of the tetrabromobisphenol A. Compared with the traditional molar ratio control range of the epoxy chloropropane and the tetrabromobisphenol A and the mass control percentage range of the traditional organic solvent, the method is more accurate; in the step S103, the mass fraction of alkali in the alkali liquor material is controlled to be 35-45%, the temperature of the cyclization reaction is controlled to be 95-110 DEG C, the time of the cyclization reaction is controlled to be 1.1-1.4 h, the latitude of each reaction is greatly restrained, the relative molecular mass of the bromine-containing epoxy resin is greatly guaranteed, the density of the bromine-containing epoxy resin is guaranteed, and the effect of improving the performance is achieved; the gummosis risk of the bromine-containing epoxy resin is reduced to a great extent, and the dimensional stability and the mechanical property of a finished product of a subsequent insulating plate are guaranteed.

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 provides a preparation method of octabromo-ether, and belongs to the technical field of flame-retardant materials. According to the method, the tetrabromobisphenol A and the allyl bromide are subjected to the carbon-oxygen coupling reaction under the catalysis of the catalyst, no halogenated salt byproduct is generated, repeated purification is not needed, the loss of the octabromo-ether caused by aftertreatment is effectively reduced, and the yield of the octabromo-ether is increased; then hydrobromic acid and tetrabromobisphenol A diallyl ether are subjected to an addition reaction under catalytic oxidation of hydrogen peroxide to obtain octabromoether, and high-toxicity bromine does not need to be adopted; and hydrogen peroxide is adopted to generate oxygen and water in the reaction, thereby being green and environment-friendly. The result of the embodiment shows that the preparation method provided by the invention is green and environment-friendly, and the yield of the prepared octabromo-ether can reach 99.6%.

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.

The invention relates to a device and a method for realizing efficient debromination by direct ultraviolet photolysis of tetrabromobisphenol A. Compared with the prior art, the wastewater containing the TBBPA is directly irradiated by the ultraviolet light of 222nm emitted by the krypton chloride excimer lamp (KrCl *), efficient degradation and debromination of the TBBPA can be realized without adding a catalyst, and secondary pollution is avoided. According to the device, a parallel light irradiation mode is adopted, and the photolysis efficiency is remarkably improved by optimizing parameters such as light source wavelength, optical path depth and irradiation intensity. Experiments show that in a deionized water system, the degradation rate of TBBPA reaches 100%, and the debromination rate reaches 85% or above (in deionized water); good adaptability is also shown in complex water quality. The method has the advantages of simplicity and convenience in operation, low cost, no secondary pollution and the like, and is suitable for industrial wastewater and drinking water treatment.

The invention discloses an adhesive formula for a copper-clad plate, and particularly relates to the technical field of adhesives, the adhesive formula comprises the following components by mass: 100-150 parts of epoxy resin; 5-15 parts of an imidazole curing agent; 20-40 parts of carboxyl-terminated liquid nitrile rubber; 1 to 4 parts of 3, 4-diaminodiphenyl sulfone; 5 to 15 parts of bismaleimide; 20 to 40 parts of tetrabromobisphenol A high brominated epoxy resin; 10 to 20 parts of phosphorus-containing novolac epoxy resin; 5-10 parts of aluminum hydroxide; 10 to 15 parts of a phosphazene flame retardant; the tetrabromobisphenol A high-brominated epoxy resin can be decomposed at high temperature to generate hydrogen bromide, and the hydrogen bromide can capture free radicals in a combustion chain reaction, so that the combustion process is interrupted, and the flame-retardant effect is achieved. According to the invention, the flame retardance can be improved in multiple ways, and the flame-retardant effect is ensured, so that the flame-retardant coating has higher stability when encountering a flame or high-temperature environment, the bonding firmness of a copper-clad plate is ensured, and the actual use effect is relatively good.

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 invention provides butyl rubber type thermoplastic vulcanized rubber as well as a preparation method and application thereof. The thermoplastic vulcanized rubber comprises the following components: butyl rubber, polypropylene, a phenolic resin vulcanization system, an anti-aging agent, a softening agent and filler, the phenolic resin vulcanization system comprises a phenolic resin main vulcanizing agent and an auxiliary vulcanizing agent; the phenolic resin main vulcanizing agent is selected from at least one of octyl phenolic resin and tert-butyl phenolic resin; the auxiliary vulcanizing agent is selected from at least one of stannous chloride and tetrabromobisphenol A. The butyl rubber type thermoplastic vulcanized rubber provided by the invention is prepared from butyl rubber, polypropylene and a composite phenolic resin vulcanization system through a dynamic vulcanization method, tetrabromobisphenol A and stannous chloride are adopted as co-vulcanizing agents to form the phenolic resin vulcanization system containing chlorine and bromine halogens, and a proper amount of white carbon black is contained in filler. The composition is simple, sulfur and an accelerant thereof are not contained, and the obtained butyl rubber type thermoplastic vulcanized rubber is excellent in mechanical property and can be processed and formed by adopting extrusion, injection molding and mold pressing methods.

The invention belongs to the technical field of epoxy resin, and particularly relates to bromine-nitrogen synergistic flame-retardant modified epoxy resin as well as a preparation method and application thereof. First epoxy resin, tetrabromobisphenol A and a catalyst are subjected to bulk polymerization, obtained tetrabromobisphenol A epoxy resin and diphenylmethane diisocyanate are subjected to a modification reaction, obtained initial modified resin, high-bromine epoxy resin and second epoxy resin are mixed, and the bromine-nitrogen synergistic flame-retardant modified epoxy resin is obtained. According to the invention, the tetrabromobisphenol A modified epoxy resin is subjected to secondary modification, so that the flame-retardant effect can be effectively obtained, residues of tetrabromobisphenol A are further effectively avoided, redundant hydroxyl groups of tetrabromobisphenol A can be consumed by isocyanate in MDI, and a bromine-nitrogen synergistic flame-retardant effect is formed; through effective cooperation of the low-molecular-weight resin and the high-molecular-weight resin, after curing, molecular chains form an interpenetrating network structure, and it can be ensured that after curing, the crosslinking density is stable, and heat resistance and toughness are both considered.

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.