153 results about "Perfluoro compound" patented technology

The present invention relates to a catalyst for the decomposition of exhausted perfluoro-compounds (PFCs) and a catalytic decomposition method of PFCs by using the same. More particularly, the present invention relates to a PFC decomposition catalyst prepared in such a manner that a surface of aluminum oxide is loaded with phosphorous (P) component at a aluminum/phosphorous mole ratio of 10 to 100 and a decomposition method of PFCs by using the catalyst. The present catalyst can be decomposed PFCs at 100% rate exhausted from semiconductor manufacturing industry and thus prevent the release of PFCs having high global warming potential into atmosphere.

The invention provides an MOEA/D algorithm based aluminum electrolysis production optimization method. The method comprises: at first, modeling an aluminum electrolysis production process by utilizing a BP neural network; and then, optimizing a production process model by utilizing an MOEA/D algorithm to obtain a group of optimal solutions of decision variables as well as current efficiency, ton aluminum energy consumption and perfluoro-compound discharge amount corresponding to the optimal solutions, wherein the MOEA/D algorithm decomposes multi-target optimization into a plurality of single-target optimization sub-problems, and a core idea of the MOEA/D algorithm is that information of other sub-problems adjacent to one sub-problem is obtained and then cooperative optimization is performed, so that the optimization speed of multi-target optimization is greatly increased. The method determines an optimal value of process parameters in the aluminum electrolysis production process, effectively improves the current efficiency, reduces the greenhouse gas discharge amount, and truly achieves the purposes of energy conservation and discharge reduction.

Chemical solvating, degreasing, stripping and cleaning agents. The agents are cleaning and solvating mixtures of dichloroethylene and alkoxy-substituted perfluoro compounds that contain six carbon atoms, with optionally highly fluorinated materials to retard flammability and/or other enhancement agents that improve and enhance the properties of the composition to accomplish its desired cleaning or solvating task. These other agents are one or more of the following materials: alcohols, esters, ethers, cyclic ethers, ketones, alkanes, aromatics, amines, siloxanes terpenes, dibasic esters, glycol ethers, pyrollidones, or low- or non-ozone depleting halogenated hydrocarbons. These mixtures are useful in a variety of solvating, vapor degreasing, photoresist stripping, adhesive removal, aerosol, cold cleaning, and solvent cleaning applications including defluxing, dry-cleaning, degreasing, particle removal, metal and textile cleaning.

The invention discloses an aluminum electrolytic production technology optimization method based on a BP neural network and an MBFO algorithm. The aluminum electrolytic production technology optimization method comprises the following steps that step one: statistics of parameters having high influence on current efficiency, ton aluminum energy consumption and perfluoro-compound emissions is performed and the parameters act as decision variables X; step two: an aluminum electrolytic production process model is established by using the BP neural network; step three: the decision variables are optimized within the value range of the decision variables by using the MBFO algorithm; and step four: field control is performed according to the optimal decision variables. The beneficial effects are that the optimal values of the technological parameters can be determined and can be applied to actual production so that current efficiency in the aluminum electrolytic production process can be enhanced, and ton aluminum energy consumption and perfluoro-compound emissions can be reduced and thus the objectives of energy conservation, consumption reduction and emission reduction can be achieved.

The invention relates to an immunoaffinity chromatography-ultrahigh performance chromatography-mass spectrum combined rapid detection method, and especially relates to a novel technology of a detection method for perfluorinated compounds in dairy products or water bodies. The method comprises following steps: step one, synthesis of artificial antigens; step two, screening and identification of polyclonal antibodies; step three, development of an immunoaffinity column; step four, establishment and optimizing of serially-combined detection method of ultrahigh performance liquid chromatography and mass spectrum. The technology provides a rapid detection method for perfluorinated compound residuals in the environment, improves the detection sensitivity, and guarantees the detection accuracy. The method meets the requirements on detection of perfluorinated compound residuals, and is beneficial for carrying out detections of perfluorinated compounds in real samples in the environment.

The invention discloses a method for rapidly screening perfluorinated compounds and precusor substances thereof in fish meat, and belongs to the technical field of aquatic product detection. According to the method, a pass-type Oasis PRiME HLB solid-phase extraction and purification strategy is adopted, a sample pretreatment process is simplified, impurity interference components such as fat and phospholipids in a sample matrix are removed, and simultaneous extraction of multiple perfluorinated compounds and precusor substances thereof is achieved; meanwhile, the advantages of a liquid chromatography-quadrupole rod/electrostatic field orbitrap high resolution mass spectrum are utilized, the qualitative capacity for a complex matrix is enhanced by obtaining the accurate mass number and rich fragment ion information, the quantifying effect of the high resolution mass spectrum is improved, high-throughput qualitative screening for simultaneously determining 18 PFCs and 21 precusor substances through single injected sampling is achieved, and a high-sensitive quantitative result is obtained.

The invention discloses a method for adsorbing and degrading PFCs. The method comprises the steps that a material capable of adsorbing the PFCs is utilized for adsorbing the PFCs in water, the water contains the PFCs, and a method for obtaining the material capable of adsorbing the PFCs comprises the steps that activated carbon is put in a potassium salt solution to be steeped for 1-3 days, the mass ratio of potassium salt to the activated carbon is 0.5 to 1.5, the potassium salt is selected from at least one of K2CO3 and KOH, high temperature activation is conducted on the steeped activated carbon to obtain an activated product, the temperature of high temperature activation ranges from 800 DEG C to 1000 DEG C, the high temperature activation time ranges from one hour to two hours, and the activated product is washed through high purity water; 2, the material which is obtained in the first step and is capable of adsorbing the PFCs is put in a persulfate solution so as to degrade the PFCs on the material capable of adsorbing the PFCs, and the persulfate solution is selected from at least one of ammonium persulfate, potassium persulfate and sodium persulfate. By means of the method, the material achieving effective regenerative adsorption of the PFCs can be obtained, the PFCs adsorbed by the material can be degraded, and innoxious treatment of the PFCs is achieved.

The invention discloses a chemistry-plant combined remediation method of fluoride-type combined pollution site soil. The chemistry-plant combined remediation method of fluoride-type combined pollution site soil comprises the following steps: firstly, crushing and screening pollution soil particles; then placing the soil particles into a soil multielement ex-situ remediation device, adding mixed eluant, and carrying out continuous ex-situ synergism elution by adopting the mode of ultrasonic intensification and warming treatment synchronously; then inoculating purslane for eluted soil, and applying a nutritious source buffer liquid equal to 30%-40% of soil mass; culturing and growing artificially, and completing the remediation. Perfluorinated compounds, polycyclic aromatic hydrocarbon and multiple types of heavy metals in site soil can be eluted efficiently and synchronously; purslane inoculation and outer source nutritional substance adding are beneficial to the deep degradation by combining with residual state polycyclic aromatic hydrocarbon after soil elution, and are also beneficial to the recovery of microorganism ecological function universality and stability of the pollution soil environment.

The invention discloses a system for full-automated and online detection of perfluoro and polyfluoro compounds in serum. The system comprises a purification column, an analyzing column, a dual ternary liquid phase chromatograph, and a triple quadrupole detector, wherein an automatic sampler of the dual ternary liquid phase chromatograph is used for directly absorbing serum samples to be loaded forwards towards the purification column, and the analyzing column is flushed; after the serum samples are loaded, the purification column is back flushed for eluting target compounds, and the samples are fed into the analyzing column; after the serum sample are eluted, the line connection returns to the initial stage, and a left pump is used for regenerating the purification column; a right pump is used for introducing the samples into the triple quadrupole detector, so that detection of perfluoro compounds in the serum is realized. The system does not need a complex artificial preprocessing process, and the problems that the analyzing method of a conventional instrument is time-consuming and labor-consuming in the preprocessing course and the samples run off seriously are solved.

The invention discloses a magnetic covalent organic framework material, and a preparation method and application thereof in detection of perfluorinated compounds. The preparation method comprises thesteps: taking 1,3,5-tri(4-aminophenyl)benzene, terephthalaldehyde and a terephthalaldehyde intermediate as raw materials, and performing covalent linkage on the surfaces of ferroferric oxide nanoparticles under the catalytic action of acetic acid to obtain a covalent organic framework material precursor layer containing azido; reducing the azido of the covalent organic framework material precursorlayer into a primary amine group to generate a magnetic covalent organic framework material containing the primary amine group, wherein the terephthalaldehyde intermediate is terephthalaldehyde of which a benzene ring is connected with the azido through a chemical bond. The magnetic covalent organic framework material provided by the invention can be quickly synthesized at room temperature, and efficient separation and enrichment of PFCs are realized in a magnetic solid-phase extraction manner.

The invention discloses a determination method of a perfluorinated compound isomer in soil and/or plants. The method comprises the following steps: (1) extracting a soil and/or plant sample with an ion pair extraction method; (2) concentrating and purifying an extracting solution obtained by the step (1); and (3) detecting a product of the step (2) with an ultra performance liquid chromatography-triple quadrupole tandem mass spectrometer, and comparing the product with an isomer standard product of parallel operation; and quantifying by adopting an internal standard method to obtain the content of each isomer of a perfluorinated compound. The determination method disclosed by the invention is accurate in detection result and has the advantages of high recycling rate, low detection limit, high sensitivity and strong matrix interference resisting capability.

The invention discloses an electrolyte additive for improving high-temperature flatulence of a battery, and relates to the technical field of lithium ion batteries, the additive comprises a 1,3-diphosphate-isothiazole compound and a water removal additive. The structural general formula of the 1,3-diphosphate-isothiazole compound is shown in the specification, wherein R1 and R2 are respectively and independently selected from one of H, C1-8 alkyl, C4-10 cycloalkyl, C2-10 alkenyl, C2-10 alkynyl, C6-16 aryl, C6-16 heteroaryl and part of fluoro or perfluoro compounds of the H, the C1-8 alkyl, the C4-10 cycloalkyl, the C2-10 alkenyl, the C2-10 alkynyl, the C6-16 heteroaryl and the part of fluoro or perfluoro compounds of the C6-16 heteroaryl. The invention also provides an electrolyte containing the additive and a lithium ion battery. The electrolyte has the beneficial effects that the special high-temperature gas expansion improving additive is added into the electrolyte, so that the reaction between the electrolyte and positive and negative electrode materials in the lithium ion battery under a high-temperature condition is inhibited, the stability of the positive and negative electrode materials under a high-temperature environment is improved, and the storage gas expansion and cycle performance of the battery under the high-temperature condition is improved.

The invention relates to a low loss foam composition and cable, such as a coaxial cable. The foam composition is formed by heating an olefinic polymer, such as a high density polyethylene, medium density polyethylene, low density polyethylene, linear low density polyethylene, polypropylene, or a combination thereof, into a molten state composition, optionally with a nucleating agent. The molten mixture is extruded under pressure through a die with a blowing agent comprising an atmospheric gas, such as carbon dioxide, nitrogen or air, and a co-blowing agent selected from hydrofluorocarbons, hydrochlorofluorocarbons, or perfluoro compounds, such as HFC-134a. The cable is formed by extruding the foam composition onto a signal carrying conductor and sheathing the foam-coated signal carrying conductor in an appropriate conducting shield.

The invention discloses an adsorption resin for removing perfluorinated pollutants in a water body as well as preparation and application of the adsorption resin, and aims to solve the problems of poor removal effect on perfluorooctanoic acid in water, no regeneration and the like of the traditional adsorption material, such as an activated carbon material. According to the method, styrene and divinylbenzene are used as framework materials; a proper pore-foaming agent and a proper dispersing agent are selected to prepare macroporous resin with moderate pore diameter; p-xylylene dichloride (XDC) is used as a post-crosslinking agent; alkylation reaction is carried out under low steric hindrance; a rigid benzene ring structure is introduced into the resin through post-crosslinking; the hydrophobicity of the resin is further improved, the crosslinking degree is improved, the micropore structure is adjusted, the adsorption resin with narrow particle size distribution, uniform pore size andhigh specific surface area is obtained, the micropore size in the resin is close to the molecular size of perfluorooctanoate in water, the adsorbate screening capacity is high, and the adsorption rateof perfluorinated compounds can be further increased.

The invention relates to a method for measuring perfluorinated compounds in textile, clad layers, coatings, liquid and powder samples. The method comprises the measuring steps that firstly, a sample is cut according to a certain dimension in an area method or a sample of a proper amount is weighed in a weight method, an organic solvent is added for ultrasonic extraction, and the mixture is cooled to the room temperature and then filtered to be fed into a machine for analysis; secondly, the quantity of perfluorinated compounds in the extracted solution obtained in the first step is measured through a liquid chromatogram and mass spectrum combined instrument; thirdly, if a liquid chromatogram and mass spectrum selected ion scanning result shows that perfluorinated compounds seem to be contained in the sample, a spectrogram of the sample is compared with that of a standard substance, if the spectrogram of the sample is matched with that of the standard substance, the extracted solution obtained in the first step is measured through a liquid chromatogram tandem mass spectrum combined instrument, characteristic ions of the sample are compared with those of the standard substance to confirm whether perfluorinated compounds are contained in the sample or not, and the content of perfluorinated compounds in the sample is calculated. The measuring method is fast and simple, and perfluorinated compounds in various materials can be accurately measured.

A pellicle 10 for lithography includes a pellicle frame 3, a pellicle membrane 1 adhered onto the upper end surface of the pellicle frame 3 and an agglutinant layer 4 formed on the lower surface of the pellicle frame 3 and the agglutinant layer 4 is formed by hardening a curable composition containing a straight chain perfluoro compound having a perfluoro structure in a main chain. The thus constituted pellicle 10 generates only a small amount of a decomposition gas even when it is used for a long time, thereby preventing solid-like foreign materials from separating out on a pattern region of a photomask 5 and can suppress degradation of an the agglutinant agent contained in an agglutinant layer 4 to be used for fixing a photomask 5 to the pellicle frame 3. Further, this pellicle 10 can be easily peeled off from a photomask 5 and replaced with a new one.

The present invention discloses an apparatus and method for treating perfluoro-compounds (PFCs). The method for treating PFCs includes: (a) decomposing PFCs and eliminating a first acid gas generated by the decomposition through a pre-cleaner; (b) filtering out dust particles from the exhaust gas through a filter; (c) electrifying the dust particles in the exhaust gas by electrical discharge and collecting dusts through a dust collector; (d) decomposing PFCs using a regenerative/catalytic reaction through a catalytic reactor; (e) eliminating a second acid gas generated by the regenerative/catalytic reaction through a post-cleaner; and (f) letting the purified exhaust gas out through a fan.

The invention belongs to the field of chemical analysis technology and environmental protection, and provides a polyvinylidene fluoride filter membrane adsorption removal method for removing perfluorinated compounds in environmental water. An adsorption medium provided by the invention is a highly fluorinated polyvinylidene fluoride filter membrane, a sample solution can quickly flow through the adsorption medium due to the large diameter of the adsorption medium, and the adsorption medium has high adsorption capacity and good selectivity on perfluorinated compounds based on the fluorine-fluorine affinity effect, and is especially suitable for enrichment and/or purification of long-chain perfluorinated compounds in environmental water samples. The adsorption medium used in the method doesnot need to be synthesized and is low in price and convenient to operate.