59 results about "Perfluorinated compound" patented technology

The invention relates to a method for degrading a perfluorinated compound by photo-reduction defluorination, which comprises the following steps of: putting the perfluorinated compound into a reaction container provided with an ultraviolet lamp, feeding a reductive substance into the reaction container through a feeding hole, performing ultraviolet irradiation through the ultraviolet lamp, and performing degradation and defluorination reaction on the perfluorinated compound and the reductive substance. Compared with the prior art, the method is simple and feasible, can be performed at normal temperature under normal pressure, does not need complex equipment, and has no requirement for the initial concentration of the perfluorinated compound; the perfluorinated compound with any concentration can be treated by adopting the method; and the toxicity of the decomposed product is reduced, and the decomposed product can be further treated by adopting other methods.

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 provides a BP neural network and MPSO algorithm-based aluminum electrolysis energy-saving and emission-reduction control method. Firstly, the modeling is conducted for the aluminum electrolysis production process based on the BP neural network. After that, based on the multi-objective particle swarm optimization (MPSO) algorithm, the model for the aluminum electrolysis production process is optimized to obtain a group of optimal solutions for each of all decision variables, the current efficiency, the energy consumption per ton of aluminum and the discharge of perfluorinated compounds corresponding to the group of optimal solutions. No crossover or mutation operation is required for the MPSO algorithm, so that the coding process is simple and easy in implementation. Meanwhile, compared with other algorithms, the MPSO algorithm has memory. In this way, not only a global optimal value and a local optimal value are retained, but also the optimal value integrity during the group evolution process is ensured. Based on the above method, the process parameters of the aluminum electrolysis production process are ensured to be optimal, and the current efficiency is effectively improved. The energy consumption per ton of aluminum is lowered, and the greenhouse gas emission load is reduced. The purposes of energy saving and emission reduction are really realized.

The invention relates to hydroxyapatite overlength nanowire flameproof paper with a waterproof function. The hydroxyapatite overlength nanowire flameproof paper with the waterproof function has super-hydrophobicity and fireproof and flame-retardant functions. The main component of the flameproof paper is hydroxyapatite overlength nanowire. The product also contains fatty acid salt or a perfluorinated compound modified on the hydroxyapatite overlength nanowire. The fatty acid salt or the perfluorinated compound carries out surface modification on the hydroxyapatite overlength nanowire. As hydroxyapatite overlength nanowire has rich surface reactive groups, the hydroxyapatite overlength nanowire is easy to undergo surface modification. Thus, the hydroxyapatite overlength nanowire is easy to combine with the fatty acid salt or the perfluorinated compound such that the hydroxyapatite overlength nanowire flameproof paper is endowed with an excellent waterproof function.

A cooling system is adapted for reduction of evaporative loss of a liquid coolant and for efficient cooling of plural electronic devices densely accommodated in a cooling bath of a small volume. A cooling system accommodates plural electronic devices in an open space of a cooling bath provided with an inlet port and an outlet port for a liquid coolant. The cooling system is configured to directly cool the electronic devices by immersion of the electronic devices in the liquid coolant circulated in the open space. The liquid coolant contains a perfluorinated compound as a main component. The liquid coolant is adapted to exhibit a liquid weight loss percentage of 1.5% or less as determined by allowing 10 ml of the liquid coolant in a 10-ml measuring cylinder (opening diameter: 11.5 mm) to spontaneously evaporate under normal environment at a room temperature of 25° C. for 100 hours.

The invention relates to a solid phase microextraction head for an enriched perfluoro compound. The solid phase microextraction head consists of a metal carrier and a coating material coated and attached to the surface of the metal carrier; the coating material is ferromagnetic fluorinated graphene. The ferromagnetic fluorinated graphene is used as an adsorption coating; the perfluorinated compound can be effectively enriched; the heat stability is high; the stability is realized in an organic solvent; the problems that most solid phase microextraction heads in the market have broad spectrum performance, and specific extraction heads for efficiently enriching the perfluorinated compound in food are lacked. In addition, magnetized metal wires are used as metal carriers; the mechanical strength is high; the fracture cannot easily occur; the coating is fixed on the meal carrier through the magnetic force; the stability and the firmness of the extraction coating are greatly enhanced.

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 a method for efficiently treating a perfluorinated compound polluted water body, and belongs to the field of degradation of persistent pollutants. An indole derivative which iselectropositive or electrically neutral in water is utilized to enhance the binding action with the PFCs of anions, thereby enhancing the reaction efficiency of the generated hydrated electrons and PFCs, promoting the degradation and defluorination of PFCs, the method solves the problems of low degradation efficiency, harsh reaction conditions, need of adding other exogenous substances and the like in the existing PFCs degradation method, does not cause secondary pollution to the environment, and has high application value.

The invention provides a method for determining total fluorine compound precursor substances in an atmospheric particulate matter sampling filter membrane; the method comprises the following steps of1) extracting a sample: carrying out ultrasonic extraction on the atmospheric particulate matter sampling filter membrane, and collecting to obtain an extracting solution; 2) purification of the sample: carrying out purifying, concentrating and purifying on the extracting solution obtained in the step 1) to obtain a sample detection solution; and 3) determination of the sample: detecting the sample detection solution obtained in the step 2) by adopting an ultra-high performance liquid phase chromatography-triple quadrupole series mass spectrometer, and obtaining the content of the total fluorine compound precursor substance by adopting an internal standard method. The invention belongs to the technical field of environmental monitoring, and by virtue of the provided measurement method, full extraction and measurement of six kinds of total fluorine compound precursor substances, such as 4:2FTS and the like in the atmospheric particulate matter sampling filter membrane can be realized, the separation effect is good, and the detection efficiency is improved; and the method has the advantages of being accurate in measurement result, high in repeatability, high in sensitivity, high in recovery rate, low in detection limit, high in substrate interference resistance and the like.

The present invention relates to the use of perfluorinated compounds as a surface coating to counteract the formation of fouling. The present invention also relates to a method for producing a surface coating capable of preventing the formation of fouling, this method comprising the application of a polar solution of a perfluorinated compound followed by a heat cycle conducted at controlled temperatures.

Provided are compositions containing an emulsion containing a perfluorinated compound, as well as methods for preparation of the compositions. Also provided are formulations containing a complex of oxygen-17 and the emulsion compositions. Additionally provided are methods for the preparation of the formulations as well as kits containing the formulations. Further provided are methods of use of the formulations in imaging of tissues using a magnetic resonance imaging system.

The invention discloses a method for identifying a thermal decomposition product of a perfluorinated compound. The method comprises determining a decomposition or evaporation temperature of a target perfluorinated compound by a thermogravimetric-differential thermal analyzer, putting the perfluorinated compound into a quartz tube, placing the quartz tube with the perfluorinated compound to the center of a furnace, carrying out heating, after the reaction, stopping furnace work and gas feeding, carrying out collection, concentration and detection on the perfluorinated compound thermal decomposition product, and carrying out analysis through a Q-TOF and thermogravimetric infrared mass spectrometer. The identifying method is simple and easy and can be used for identifying the perfluorinated compound products in refuse burning. The method provides the basis for fate of the perfluorinated compound products in refuse burning, guarantees ecological security, has important environmental, social and economic significances and can be widely used.

The invention relates to a self-separation fluxing agent of hot tinning and a tin alloy and a preparation method thereof. The self-separation fluxing agent comprises the following raw materials by weight percentage of 10-15% of a heavy metal fluoride active agent, 80-87% of polyhydroxy ethylene diamine and 3-5% of an alcohol solvent. According to the self-separation fluxing agent provided by the invention, the borofluoride with poor activity is abandoned and a perfluorinated compound with higher activity as an active agent is adopted, meanwhile, the hydrofluoride of polyhydroxy methyl organic amine with the high activity is utilized as a matrix in a matching manner so as to enable the perfluorinated compound to be fully dissolved, the matrix has a carrier action, and a scaling powder does not fully contain an inactive filling.

The invention discloses a tetanus exotoxin adsorbent. The tetanus exotoxin adsorbent is prepared from a carrier, and immune globulin and a perfluorinated compound which are immobilized on the surfaceof the carrier and are combined with tetanus exotoxin. A patient with tetanus is treated by utilizing an immunoadsorption method, and the human tetanus immune globulin is immobilized on a carrier microsphere; the free tetanus exotoxin in blood is efficiently cleaned by utilizing a principle of specifically combining the immune globulin and the exotoxin, and the perfluorinated compound is introduced so that the dissolved oxygen of an adsorbent is increased; the oxygen content in the blood is increased through extracorporeal blood circulation, and suffocation caused by laryngeal spasm on a patient is alleviated. The tetanus exotoxin adsorbent utilizes high-potency tetanus immune globulin; the immune globulin has strong specificity of neutralizing the tetanus exotoxin and has no anaphylacticreaction; the adsorbent has an additional oxygen aeration function so that the adsorbent is simpler to operate in clinical application process and the infection risks are smaller.

An enzyme formulation includes an encapsulated fungal enzyme which is effective for degrading at least one material selected from the group consisting of hydrocarbons, vulcanized rubber, synthetic rubber, natural rubber, vulcanized polymers and perfluorinated compounds. A degradation method includes treating one of the above-mentioned materials with an encapsulated fungal enzyme to degrade the material.

The invention discloses an optimization method for energy conservation and emission reduction of aluminum electrolysis based on decision maker preference information. Firstly, a recursive neural network is used to model an aluminum electrolysis production process, and then a decision maker sets a desired target value, an R-dominance preference dominance method is introduced, a multi-objective quantum particle swarm algorithm is combined to optimize a production process model, and an optimal decision variable that best meets the expectation of the decision maker, and the corresponding current efficiency, cell voltage, perfluorinated compound emissions and the energy consumption per ton of aluminum are further obtained. The MQPSO algorithm does not need to perform crossover and mutation operations, and only requires the simplest location update step, so that the encoding process is simple, a strong global search capability is realized, the integrity of a preference optimal value in the process of population evolution can be easily implemented, and the needs of the decision maker can be met. By using the method to determine the optimal value of process parameters in the aluminum electrolysis production process, the current efficiency can be effectively improved, the cell voltage can be reduced, the greenhouse gas emissions and the energy consumption per ton of aluminum can be reduced, and the purpose of energy conservation and emission reduction can be achieved.

The present invention provides a differential evolution aluminum electrolysis multi-objective optimization method based on AR preference information. The method comprises the steps of: employing a recurrent neural network to perform modeling of an aluminum electrolysis production process, setting an expected target value by a decider, employing a preference multi-objective quantum individual groupalgorithm to perform optimization of a production process model to obtain one set of optimal solutions, which the best meet the decider's expectation, of each decision variable, and current efficiencies, cell voltages, perfluorinated compound discharge and ton aluminum energy consumption corresponding to the optimal solutions. The variation, intersection and selection operation in a differentialevolution algorithm are employed to perform preference optimizing of decision variables to determine optimal values of process parameters in the aluminum electrolysis production process so as to effectively improve the current efficiency, reduce the cell voltages, reduce the greenhouse gas emissions and ton aluminum energy consumption and achieve the purpose of energy conservation and emission reduction while meeting the decider's preference.