94 results about "Tetrachloroethylene" patented technology

The invention belongs to the technical field of new materials, and discloses a polyolefin dissolving agent as well as a preparation method and application thereof. The cleaning agent is composed of modified long-carbon-chain imidazole dinitrile amine salt, modified long-carbon-chain imidazole long-carbon-chain anion salt, betaine salt, imidazole acetate, imidazole long-carbon-chain anion salt, quaternary ammonium long-carbon-chain anion salt, imidazole bis (fluorosulfonyl) imide salt, imidazole hexafluorophosphate and long-carbon-chain anion and cation liquid. Under the condition of 180-210 DEG C, polyolefin (PP or PE) with the molecular weight of 50-8 million can be dissolved by adopting the polyolefin dissolving agent disclosed by the invention, and effective extrusion can be realized by adopting a twin-screw extruder after dissolution. After PP / PE powder is dissolved by adopting the polyolefin dissolving agent disclosed by the invention, sheet casting or spinning is carried out, casting sheets or PP / PE fibers are washed by using ethanol / dichloromethane / hydrocarbon / tetrachloroethylene to remove ionic liquid, and a polyolefin diaphragm or polyolefin fibers can be prepared.

The invention discloses a method for removing oligomers on the surface of a polyester fiber product, which comprises the following steps: adding the polyester fiber product into water, adding 0.1-10g of nonionic surfactant with the HLB (Hydrophile-Lipophile Balance) value of less than 10 according to 1L of water, cleaning for 5-30 minutes at 15-60 DEG C, then discharging liquid, adding the polyester fiber product into a non-aqueous medium, cleaning for 5-15 minutes at 15-50 DEG C, then discharging liquid, washing for 5-15 minutes at 15-50 DEG C, and drying to obtain the polyester fiber product. The non-aqueous medium is selected from at least one of tetrachloroethylene, n-butyl acetate, gamma-butyrolactone, epsilon-caprolactone and 1, 4-dioxane; and taking out the cleaned polyester fiber product, and putting the polyester fiber product into a dryer provided with a condensation recovery device for sealed drying. Experiments prove that the method not only can effectively remove the oligomer on the surface of the polyester fiber product, but also is simple to operate and easy to realize large-scale production, and has the advantages of low cost, high efficiency, environmental protection and the like, and the waste liquid can be recycled.

The invention discloses a method for synthesizing a dichloroacetyl compound, which comprises the following steps: tetrachloroethylene and an acid are subjected to an addition reaction at 100-200 DEG C to obtain an adduct, then the adduct is subjected to an acidolysis, hydrolysis or alcoholysis reaction to obtain the dichloroacetyl compound, the acid for the addition reaction is at least one of sulfuric acid, trifluoromethanesulfonic acid, methanesulfonic acid and phosphoric acid, and the acid for the alcoholysis reaction is at least one of sulfuric acid, trifluoromethanesulfonic acid, methanesulfonic acid and phosphoric acid. The molar ratio of the tetrachloroethylene to the acid is 1: (1-10). By controlling the types of acids and increasing the temperature of the addition reaction, the addition reaction of tetrachloroethylene and acids in the absence of a catalyst is realized. Double bonds of tetrachloroethylene and hydrogen protons are subjected to an addition reaction in a strong acid environment to form a cationic intermediate, then the cationic intermediate is combined with acid radical anions to form an adduct, and the adduct intermediate is high in activity, unstable and free of separation and can be directly subjected to a hydrolysis reaction, an acidolysis reaction or an alcoholysis reaction with another substrate (such as water, acid or alcohol) respectively. The synthesis of dichloroacetyl series compounds is realized, and the route has universality and diversity.

The utility model relates to a device for treating VOCs waste gas in ultra-high molecular weight polyethylene fiber production through resin adsorption, which comprises two absorption units, a condenser and a receiving tank, an air inlet and an air outlet are formed in the upper end and the lower end of the tank body respectively, the compressible material layer is laid in the tank body, the microporous nets are arranged on the inner sides of the air inlet and the air outlet respectively and located in the shell, the tank body is filled with the resin, and the temperature control pipes are inserted into the resin. The temperature control pipe is connected with a steam source, air inlets of the two absorption units are connected with a VOCs waste gas source through pipelines, air outlets of the two absorption units are connected with an exhaust pipeline and a recovery pipeline, and the exhaust pipeline and the recovery pipeline are both provided with valves; the recovery pipeline is connected with a condenser, and the condenser is connected with the receiving tank; waste gas enters the tank body through the gas inlet, and purified gas formed after resin adsorption operation is discharged from the gas outlet; after resin adsorption saturation, the exhaust pipeline is closed, the recovery pipeline is opened, high-temperature steam is input into the temperature control pipe to enable the resin to be analyzed to generate tetrachloroethylene gas, and the tetrachloroethylene gas enters the recovery pipeline and is condensed and recovered.

The invention discloses continuous synthesis equipment for high-purity tetrachloroethylene. The continuous synthesis equipment comprises a chlorination synthesis device, an energy-saving device, a cooling and washing device, a carbon tetrachloride refining device and a tetrachloroethylene refining device. The invention further discloses a continuous synthesis process of the high-purity tetrachloroethylene. The continuous synthesis process comprises the steps of chlorination synthesis, cooling and washing, carbon tetrachloride refining and tetrachloroethylene refining. The reaction in the tube nest of the chlorination reaction kettle generates carbon tetrachloride, the carbon tetrachloride in the shell pass reacts to generate tetrachloroethylene, and the heat released by the first-step reaction promotes the forward proceeding of the second-step reaction. The heat-conducting oil is used for removing heat after reaction and supplying the heat to the rectification system, so that the energy consumption of the system is reduced. According to the invention, the carbon tetrachloride crude product is refined and then returns to the system, the tetrachloroethylene yield is high, and the conversion rate of tetrachloroethylene in the synthesis kettle is not influenced. The heat transfer oil is used for heating the rectification system and a tetrachloroethylene high-low pressure rectification mode, and the energy of the system is saved by more than 50%.

The invention provides a method for preparing anti-permeation anti-corrosion filler by using waste rubber and anti-corrosion paint, and belongs to the technical field of paints.The method comprises the steps that the waste rubber is smashed and sieved to obtain rubber particles, then the rubber particles are sequentially subjected to acid pickling, alkali washing and water washing and dried, then the rubber particles are added into tetrachloroethylene to be chlorinated, flocculent products are removed through an air blowing rotary furnace, and the anti-permeation anti-corrosion filler is obtained; and adding the rubber particles into tetrachloroethylene again for chlorination, carrying out bubbling operation, and draining to obtain the anti-permeation and anti-corrosion filler. The chlorine content of the impermeable anticorrosive filler prepared by the method is increased, the corrosion resistance is enhanced, and an anticorrosive coating prepared from the filler can effectively solve the problem of diffusion of water molecules, also can effectively inhibit permeation and migration of corrosive medium chloride ions, and can greatly improve the impermeability.

The application discloses resin-coated urea slow-release fertilizer, a preparation method and application thereof, and first prepares resin-coated urea slow-release fertilizer, adopts polystyrene, polyethylene, talcum powder and starch mixture to be dispersed and heated in tetrachloroethylene to prepare coating liquid, then sprays the coating liquid on the surface of dried urea after pretreatment, and with evaporation of the solvent, a resin layer is formed on the particle, and the resin-coated urea slow-release fertilizer is obtained. The resin-coated urea can simulate atmospheric nitrogen deposition, and can more truly simulate the nitrogen deposition mode.

The application provides a method for preparing anti-permeation anticorrosive filler from waste rubber and anticorrosive paint, and belongs to the technical field of paint, which comprises the following steps: crushing and sieving waste rubber to obtain rubber particles, then sequentially performing acid pickling, alkali washing and water washing, and drying, then adding the rubber particles into tetrachloroethylene for chlorination, then removing flocculent products by using a blast rotary furnace, then adding the rubber particles into tetrachloroethylene again for chlorination and performing bubbling operation, and then draining to obtain the anti-permeation anticorrosive filler. The anti-permeation anticorrosive filler prepared by the method has improved chlorine content and enhanced corrosion resistance, the anticorrosive coating prepared by using the filler can effectively solve the diffusion problem of water molecules, can effectively inhibit the permeation and migration of corrosion medium chloride ions, and can greatly improve the anti-permeation performance.

The invention relates to the technical field of dry cleaning machines, in particular to a dry cleaning machine door opening air purification and regeneration system which comprises a negative pressure gas capturing device and a carbon adsorber, the gas capturing device comprises a negative pressure gas suction port, a negative pressure gas suction channel and a catalytic device, and the negative pressure gas suction port is formed in the circumferential direction of a door frame of a dry cleaning machine; the negative-pressure air suction channel is communicated with the negative-pressure air suction port and the catalytic device, the catalytic device is communicated with the carbon adsorber through an air pipeline, a steam heating pipe, an electric heating pipe, a heat pump and a cold pump are arranged in the catalytic device, and through multi-stage temperature regulation (condensation and heating), the treatment effect on gaseous tetrachloroethylene is remarkably improved; the stainless steel container is filled with granular activated carbon powder, has high specific surface area and good adsorption performance, and can effectively adsorb gaseous tetrachloroethylene, so that the concentration of the tetrachloroethylene in the barrel is reduced to 2g / m < 3 > or below.

The invention provides an oxygen barrier layer, a preparation method of the oxygen barrier layer and a flexible resin plate with textured flat-top lattice points on the surface, polymer particles are formed by in-situ polymerization of polyurethane resin containing free isocyanate monomers and oxygen barrier resin containing hydroxyl in an organic solvent, and solid filler does not need to be additionally added; the molar content of hydroxyl in the oxygen inhibitor resin is greater than the molar content of isocyanate in the isocyanate monomer, so that the oxygen inhibitor is excessive, and the oxygen inhibitor resin, the polyurethane resin and the flatting agent which do not participate in the reaction jointly participate in film formation. Raw materials of the oxygen barrier layer can be dissolved in a mainstream commercially available flexographic flushing medium, such as an organic solvent containing tetrachloroethylene / n-butyl alcohol or a high-end environment-friendly developing solution containing terpene or commercially available Shanghai sensitive morning, and a photopolymerization reaction does not occur. After exposure, laser ablation and plate washing by a flexible plate washing medium, the flexible resin plate with the flat-top lattice points with the sand meshes on the surface is prepared, and the oxygen barrier layer is completely removed without residues in the plate washing process.

The present invention relates to a method for resource utilization of waste alkali and waste hydrochloric acid produced as by-products of a tetrachloroethylene heavy component incineration device, comprising the following steps: (1) filtering the waste alkali and waste hydrochloric acid produced as by-products of the tetrachloroethylene heavy component incineration device respectively to obtain a waste alkali filtrate and a waste hydrochloric acid filtrate; (2) subjecting the waste hydrochloric acid obtained in step (1) to organic matter degradation treatment and filtering again; (3) neutralizing the waste alkali filtrate and the waste hydrochloric acid; (4) introducing the neutralized brine obtained in step (3) into a clarification tank, filtering the clarified supernatant to obtain a filtrate; and (5) subjecting the filtrate in step (4) to adsorption treatment and then A / O oxidation treatment to obtain a brine with a COD of less than 100 mg / L. The present invention not only solves the problem that waste hydrochloric acid containing organic matter is difficult to treat, but also solves the problem that the brine generated after acid-base neutralization is directly discharged and wastes resources, thereby reducing environmental pollution, turning waste into treasure, and reducing production costs for enterprises.

The invention relates to a method for measuring the concentration of tetrachloroethylene in water, which comprises the following steps: (1) detecting a standard working solution of tetrachloroethylene by using a high performance liquid chromatograph to obtain a standard working curve of the tetrachloroethylene absorption peak area and absolute concentration of the standard working solution of tetrachloroethylene; (2) detecting a water sample to be detected by using the high performance liquid chromatograph to obtain the tetrachloroethylene absorption peak area of the water sample to be detected; a mobile phase used in the detection of the high performance liquid chromatograph comprises an organic phase and ultrapure water, and the volume ratio of the organic phase to the ultrapure water is (70-90): (30-10); the detection wavelength of the detection is 212 to 216 nm; the temperature of a column oven of the high performance liquid chromatograph is 35-40 DEG C. According to the method disclosed by the invention, the peak appearance time is short, the separation effect of the detected main peak and the impurity peak is good, the fitting degree of the obtained standard working curve is high, the separation degree of the main peak and the impurity peak in the detection of an actual water sample containing tetrachloroethylene is high, and the detection result is reliable.

The invention provides an aerogel composite purification material as well as a preparation method and application thereof. According to the preparation method, medulla stachyuri is used as a raw material, the aerogel composite purification material can be prepared through alkali liquor dipping, amino modification, MOFs in-situ growth and directional freeze-drying forming treatment in sequence, all the steps are matched with one another to form a graded porous structure, pyridine ring groups, pyrrole ring groups and active metal ions are introduced, the several components have a synergistic effect, and the purification effect is good. The purifying material can efficiently adsorb air pollutants, such as benzene and benzene series, formaldehyde, trichloroethylene, tetrachloroethylene, nitrogen oxide, CO, ammonia, nicotine and the like. The invention provides the aerogel composite purification material prepared by the preparation method. The invention also provides an application of the aerogel composite purification material as an adsorption material in air purification so as to realize effective removal of indoor air pollutants.

The invention relates to an ultra-high molecular weight polyethylene fiber extraction agent cleaning device, which is used for cleaning ultra-high molecular weight polyethylene fibers with residual extraction agents after extraction, is arranged between an extraction tank and a drying box, and comprises a silk passing channel extending from the extraction tank to a silk inlet of the drying box; the middle of the silk passing channel is bent downwards and back, a cleaning tank containing a cleaning agent is formed in the bent position, the cleaning tank is connected with an oscillator, and an extracting agent in the ultra-high molecular weight polyethylene fibers entering the cleaning tank in the silk passing channel is separated from the ultra-high molecular weight polyethylene fibers and settles at the bottom of the cleaning tank. When the extracting agent is tetrachloroethylene, the cleaning agent is water or plasma liquid. According to the method, the extracted ultra-high molecular weight polyethylene fiber containing the extraction agent is washed in the cleaning agent, and all or most of the extraction agent is removed.

The utility model relates to an ultra-high molecular weight polyethylene fiber extracting agent cleaning device, which is used for cleaning ultra-high molecular weight polyethylene fibers with residual extracting agents after extraction, is arranged between an extraction tank and a drying box and comprises a silk passing channel extending from the extraction tank to a silk inlet of the drying box. The middle of the silk passing channel is bent downwards and back, a cleaning tank containing a cleaning agent is formed in the bent position, the cleaning tank is connected with an oscillator, and an extracting agent in the ultra-high molecular weight polyethylene fibers entering the cleaning tank in the silk passing channel is separated from the ultra-high molecular weight polyethylene fibers and settles at the bottom of the cleaning tank. When the extracting agent is tetrachloroethylene, the cleaning agent is water or plasma liquid. The ultra-high molecular weight polyethylene fiber containing the extraction agent after extraction is washed in the cleaning agent, and all or most of the extraction agent is removed.

A method for separating R22 and HFP, the method comprising: a mixing step for obtaining a mixture for extraction, the mixture being a mixture of a first mixture containing R22 and HFP and an extraction solvent containing an organic solvent selected from the group consisting of dichloromethane, chloroform, 1, 1, 1-trichloroethane, 1, 1, 2-trichloroethane, 1, 1, 1, 2-tetrachloroethane, 1, 1, 2, 3, 3-tetrachloroethane, 1, 1, 2, 3-tetrachloroethane, 1, 1, 2, 3, 3-tetrachloroethane, 1, 1, 2, 3, 3-tetrachloroethane, 1, 1, 2, 3-tetrachloroethane, 1, 1, 2, 3, 3-tetrachloroethane, 1, 1, 2, 3-tetrachloroethane, 1, 1, at least one chlorine-containing compound selected from the group consisting of 1, 1, 1, 2-tetrachloroethane, pentachloroethane, hexachloroethane, trichloroethylene and tetrachloroethylene; and an extraction distillation step in which the mixture for extraction is distilled to obtain a first distillate having HFP as the main component and a first bottoms product having the extraction solvent as the main component and containing R22, respectively, and an extraction distillation step in which the mixture for extraction is distilled to obtain a first distillate having HFP as the main component and a first bottoms product having R22 as the main component.

The invention relates to the technical field of colloidal quantum dot manufacturing, in particular to a method for preparing HgTe quantum dots based on ODT-assisted synthesis, which comprises the following steps: adding oleylamine into a single-mouth bottle, sequentially adding HgCl2 and ODT into the bottle, adding a TOP-Te solution, finally injecting tetrachloroethylene, trimercaptopropionic acid and isopropanol into the solution, centrifuging to obtain a precipitate, dispersing the precipitate in n-octane, and drying to obtain the HgTe quantum dots. The HgTe quantum dot solution is obtained. According to the method, ODT-assisted synthesis is adopted, and the HgTe CQDs are excellent in monodispersity and exciton absorption characteristic; the HgTe quantum dot film prepared from the synthesized HgTe quantum dots is flat and uniform, and has low roughness.

The invention relates to a glue comprising a polystyrene slurry and a chlorinated solvent selected from trichloroethylene, tetrachloroethylene and a mixture thereof. The invention also relates to the method for preparing the glue according to the invention. The invention also relates to a bottle containing the glue according to the invention.

The invention discloses chlorinated hydrocarbon degrading bacteria Stutzerimonas degradants The invention discloses SH1 strain and application thereof, belonging to the field of environmental microorganisms. Stutzerimonas degradans The SH1 strain is deposited in the China Center for Type Culture Collection with a deposit number of CCTCC NO: M 20221863 and a deposit date of December 5, 2022. The strain has the function of completely biodechlorinating tetrachloroethylene and trichloroethylene under both aerobic and anaerobic conditions. The growth of the strain has low requirements for environmental conditions and can effectively degrade chlorinated hydrocarbon pollutants under different oxygen content conditions without accumulation of toxic intermediates. The strain or the microbial agent prepared from it can be used for bioremediation of soil or groundwater in industrial contaminated sites contaminated by chlorinated hydrocarbons, and has important application value.

The invention provides a modified loofah sponge fiber composite material as well as a preparation method and application thereof. According to the preparation method, natural loofah sponge is mainly used as a raw material and is sequentially subjected to amino modification, aerogel preparation and fiber membrane composite treatment, so that the aerogel and a spandex fiber membrane are introduced into the loofah sponge, the finally prepared modified loofah sponge fiber composite material has a hierarchical pore structure, and the physical adsorption performance of the loofah sponge fiber composite material on air pollutants is effectively improved; groups such as amino groups are introduced into the loofah sponge, so that the chemical adsorption performance on air pollutants can be improved; the spandex fiber membrane can effectively filter particulate matters such as PM2.5; therefore, the modified loofah sponge fiber composite material has better selective adsorption on aldehydes such as formaldehyde and the like, and meanwhile has better removal capacity on air pollutants such as PM2.5, benzene series, nicotine, NOX, CO, trichloroethylene or tetrachloroethylene and the like, so that the air pollutants in the environment are effectively removed, and therefore, the modified loofah sponge fiber composite material has the advantages of environmental protection, environmental protection and the like. The material can be used as a pollutant purification material in air pollutant adsorption.

The invention relates to a process for producing phosphorus-chlorine compounds, characterized by the steps of i. reacting a phosphorus-oxygen compound-containing material in the presence of tetrachloroethene at a temperature of 500 to 1000°C and ii. removing and isolating the formed phosphorus-chlorine compounds, in particular phosphorus oxychloride, in the off-gas stream.

The utility model relates to the technical field of dry cleaning machines, and discloses a full-automatic totally-closed tetrachloroethylene dry cleaning machine which comprises a dry cleaning machine body, a controller is arranged on one side of the front face of the dry cleaning machine body, a roller is arranged in the dry cleaning machine body, and a machine door is hinged to the position, corresponding to the roller, of the front face of the dry cleaning machine body. Four groups of mounting grooves are formed in the dry cleaning machine body around the outer side of the roller in an array mode, mounting rails are fixedly mounted in the mounting grooves, and filters are detachably mounted in the mounting rails; according to the full-automatic totally-closed tetrachloroethylene dry cleaning machine, a straight rod is driven to slide outwards by pulling a pull handle, that is, an extrusion rod is driven by a connecting plate to approach and extrude an elastic plate, and then the elastic plate is extruded and deflected into a movable groove and moved out of a clamping groove, so that a limiting effect is not played any more, and at the moment, a sliding edge part can be pulled out of a mounting rail; therefore, the filter is convenient to disassemble, clean or replace.

The utility model discloses a reaction device for co-producing trichloroethylene and tetrachloroethylene by using a dichloroethane oxychlorination method, and relates to a trichloroethylene and tetrachloroethylene preparation device, which comprises a dichloroethane storage tank, an HCL storage bottle, an oxygen storage bottle, a tubular reactor, a heating device, a primary preheater, a gas mixer and a fused salt heat conduction sleeve, the primary preheater is connected with the gas mixer, the HCL storage bottle and the oxygen storage bottle are respectively connected with the mixing pipe section, the mixing pipe section is respectively connected with an inlet of the gas mixer and the middle part of the tubular reactor, and the gas mixer is connected with the upper end of the tubular reactor; the fused salt heat conduction sleeve is sleeved outside the tubular reactor, heat conduction fused salt is arranged in the fused salt heat conduction sleeve, and the heating device is arranged outside the fused salt heat conduction sleeve. The method has the advantages that heat release is dispersed, local reaction pressure is small, and the yield ratio of trichloroethylene to tetrachloroethylene can be rapidly adjusted according to needs.

The invention relates to the field of detection of N, N-dimethylformamide, in particular to a method for detecting the content of N, N-dimethylformamide. The invention relates to a method for detecting the content of N, N-dimethylformamide, which comprises the following steps: preparing a standard solution, diluting, pre-treating, filtering and analyzing, wherein a solvent is chloroethylene, the chloroethylene comprises at least one of trichloroethylene and tetrachloroethylene, and gas chromatography-mass spectrometry is adopted. According to the present invention, the N, N-dimethylformamide is dissolved through the vinyl chloride to make the test work curve, the N, N-dimethylformamide in the sample is extracted through the vinyl chloride, and then the gas chromatography-mass spectrometry analysis is adopted, such that the determination accuracy of the N, N-dimethylformamide content in the sample can be improved compared with the determination accuracy of the organic solvents such as acetone, methanol and the like.

Adhesive obtained from an expanded polystyrene magma. The invention relates to an adhesive comprising a polystyrene magma and a chlorinated solvent selected from trichloroethylene, tetrachloroethylene, and mixtures thereof. The invention also relates to the process for preparing the adhesive according to the invention. The invention also relates to a bottle containing [Figure for the abstract: None]

The utility model relates to the technical field, in particular to a methane chloride crude distillation tower residual liquid separation and recovery device which comprises a methane chloride crude distillation tower, the tower bottom of the methane chloride crude distillation tower is connected with a feeding port of a rectifying tower through a third pipeline, and the tower top of the rectifying tower is connected with a superheater through a first connecting pipe. The superheater is connected with a tetrachloroethylene reactor through a pipeline; a tower kettle of the rectifying tower is connected with an incinerator through a pipeline; the tower top of the rectifying tower is connected with a crude methane chloride feeding pipe through a connecting pipe II, and the crude methane chloride feeding pipe is connected with a feeding hole of a methane chloride crude distillation tower; according to the utility model, the methane chloride and the dichloromethane in the residual liquid of the methane chloride crude distillation tower can be separated and recovered, the cost is lower, the risk is small, and the damage to the environment is reduced.

The invention relates to the technical field of electric appliance cleaning agents, in particular to a high-voltage electric appliance cleaning agent and a preparation method thereof. The cleaning agent is prepared from the following components in parts by weight: 18-25 parts of tetrachloroethylene, 25-35 parts of dichloromethane, 1-5 parts of fluoroheptane, 15-20 parts of kerosene, 10-15 parts of a surfactant, 20-25 parts of a solvent, 1-3 parts of silicone oil, 1-3 parts of a penetrant and 0.2-0.8 part of an antistatic agent. The electrical equipment cleaning agent is safe and environment-friendly to use, on the premise that the electrical equipment is cleaned, the insulation and voltage resistance performance of the product is improved, the cleaning effect is guaranteed, meanwhile, the safety of construction personnel and the electrical equipment is guaranteed, especially for cleaning of the electrical equipment which cannot be shut down, the highest voltage resistance of the product can reach 10 KV or above, and the electrical equipment cleaning agent is suitable for being used for cleaning electrical equipment which cannot be shut down. And the cleaning requirements of most electrical equipment are met, shutdown is not needed, and the production efficiency of enterprises is improved.

The present invention relates to a hybrid plastic regenerated polyethylene composition having a melt flow rate (ISO 1133, 2.16 kg, 190 DEG C) of from 0.1 to 1.5 g / 10 min; a density of 938 to 985 kg / m3, and comprising 35 wt% or more of a regenerated polyethylene fraction (rPE); wherein the hybrid plastic regenerated polyethylene composition has: (a) a total amount of ethylene units (C2 units) of at least 95.0 wt%, measured by 13C-NMR of the d2-tetrachloroethylene soluble fraction; (b) the total amount of continuous C3 units derived from polypropylene (PP) is from 0 to 3.0 wt%, as determined by a quantitative 13C {1H}-NMR measurement of the soluble fraction; and (c) an environmental stress cracking resistance (ESCR) of at least 1000 hours as determined by the Bell test according to IEC 60811-406 method B wherein the hybrid plastic regenerated polyethylene composition further comprises: at least one native polyethylene component (B), optionally blended with carbon black, and optionally a native polyethylene component (B1) different from the native polyethylene component (B), optionally blended with carbon black, and optionally blended with carbon black, the present invention relates to a hybrid plastic regenerated polyethylene composition comprising at least one thermoplastic elastomer, optionally blended with carbon black, where the hybrid plastic regenerated polyethylene composition has a tear resistance of at least 24 N / mm as determined according to BS 6469 99.1 node. This hybrid plastic regenerated polyethylene composition has high purity in terms of polyethylene content, low contaminant content, high homogeneity, improved mechanical properties, and good optical properties. The invention also relates to a process for its preparation, to the aforementioned regenerated polyethylene fraction (rPE) obtainable or by a process for regenerating a hybrid plastic regenerated stream, to articles made from the aforementioned hybrid plastic regenerated polyethylene composition, and to the use of the aforementioned hybrid plastic regenerated polyethylene composition in wire and cable applications.

The invention discloses a resin-coated urea slow-release fertilizer and a preparation method and application thereof.The resin-coated urea slow-release fertilizer is prepared firstly, specifically, a mixture of polystyrene, polyethylene, talcum powder and starch is dispersed and heated in tetrachloroethylene to prepare coating liquid, then the surface of dried urea is pretreated and then sprayed with the coating liquid, and the resin-coated urea slow-release fertilizer is obtained; along with evaporation of the solvent, a resin layer is formed on the particles, and the resin coated urea slow-release fertilizer is obtained. The resin-coated urea is adopted to simulate atmospheric nitrogen sedimentation, so that a nitrogen sedimentation mode can be simulated more truly.

The present invention is applicable to the field of environmental engineering technology, and provides a carboxymethyl-β-cyclodextrin enhanced reaction composition and its application. The present invention adopts a chemically degradable system that is simple to obtain, green and environmentally friendly, and biodegradable. The operation is safe and simple. By using carboxymethyl-β-cyclodextrin as a chelating agent for divalent iron and a solubilizer for tetrachloroethylene, the reaction system of sodium persulfate and divalent iron is enhanced, the content of effective divalent iron in the reaction system and the solubility of tetrachloroethylene pollutants are increased, and the degradation rate of tetrachloroethylene pollutants is improved. This reaction system is applicable to the aquifer environment with a pH of 1-7 and a temperature of 10-25 °C, and is relatively less affected by the types and concentrations of common cations and anions and the concentration of humic acid in the aquifer environment. The reaction technology and process are simple, the degradation rate of tetrachloroethylene pollutants can reach more than 95%, and at the same time, the complete degradation and mineralization of tetrachloroethylene pollutants can be achieved.