16 results about "Dichloroethylenes" patented technology

The invention discloses a high-stability non-fluorine polymer waterproof and oil-proof agent and a preparation method thereof, and belongs to the technical field of functional finishing of textiles. The waterproof and oil-proof agent is prepared by emulsion polymerization of a long-chain acrylate monomer, a cyclic acrylate monomer, alkylene-containing silane, a chlorine-containing monomer, epoxy-vinyl double-modified silicone oil, nanoparticles, a surfactant, a cosolvent, water and an initiator according to a specific proportion. Epoxy groups in the epoxy-vinyl double-modified silicone oil can neutralize acidic substances generated in the polymerization process, and the storage stability of the emulsion is remarkably improved; meanwhile, vinyl participates in copolymerization, epoxy groups enhance the binding force with the fabric, and the fabric is endowed with excellent waterproof, oil-proof and washable properties by cooperating with silane and nano particles. The product provided by the invention does not contain PFAS, is environment-friendly, and solves the technical problems that the existing fluorine-containing finishing agent is limited in environmental protection and the traditional vinyl chloride / vinylidene chloride emulsion is poor in stability.

The invention discloses a CFC-112 hydrogen-assisted dechlorination catalyst and a preparation method thereof, the hydrogen-assisted dechlorination catalyst comprises an active component, a metal additive and a carrier, and the active component and the metal additive are loaded on the carrier; the active component is precious metal Pd, and the mass fraction of Pd is 0.1%-1.0%; the metal additive is selected from at least one of K, Mn, Fe, Co, Ni, Cu, La and Ce, and the mass fraction is 0.5%-5.0%; the carrier is activated carbon, and the activated carbon is selected from any one of coconut shell charcoal, wood charcoal, shell charcoal and coal charcoal. The electronic structure of the active site is regulated and controlled through the electronic effect and coordination effect of the metal additive, and the dispersity of the active component is increased by virtue of a step-by-step impregnation method, so that the catalytic activity and the target product selectivity are improved, and the service life of the catalyst is prolonged; the catalyst shows excellent catalytic activity, selectivity and good chemical stability in the process of preparing 1, 2-difluorodichloroethylene, and has industrial application potential.

The utility model relates to the technical field of waste gas treatment, in particular to an oxygen cracking method treatment system for 1, 1-dichloroethylene organic waste gas. The waste gas pipeline and the air pipeline are connected with the oxygen cracking device, and the oxygen cracking device internally comprises a preheating heat exchanger, an electric heater and a reaction bed which are sequentially connected; the reaction bed is connected with a first-stage washing tower through a preheating heat exchanger, the bottom of the first-stage washing tower is connected with an alkali liquor tank, the top of the alkali liquor tank is provided with a second-stage washing tower, a water pipeline is respectively connected with the first-stage washing tower and the second-stage washing tower, the alkali liquor tank is connected with an alkali liquor cooler through an alkali liquor pump, and an outlet of the alkali liquor cooler is divided into three pipelines; a primary washing tower, a secondary washing tower and a neutralization kettle are respectively connected, the neutralization kettle is connected with an evaporative crystallization device through a filtering device, and the evaporative crystallization device is connected with a recycled water storage tank through an evaporated water cooler; the waste alkali liquor with excessive salt content is transported to a neutralization kettle for neutralization, filtration, evaporative crystallization and salt and water recovery, so that the industrial value of the system is improved.

The invention discloses a sulfur-nickel zero-valent iron material for deep hydrogenolysis dechlorination based on a high-valence sulfur source and application, and belongs to the field of environmental remediation materials. According to the method, a one-step ball milling process is adopted, an iron source, a nickel source and a high-valence sulfur source are subjected to co-ball milling, and the sulfur-nickel co-doped ball-milled zero-valent iron material is prepared. Compared with a conventional material using a low-valence sulfur source, the high-valence sulfur source is introduced, so that the microstructure and the surface chemical state of the material can be remarkably regulated and controlled, the degradation path of the chlorinated hydrocarbon is effectively changed, the chlorinated hydrocarbon is mainly degraded through a deep reduction hydrogenolysis path, and the degradation efficiency of the chlorinated hydrocarbon is improved. And a beta-elimination way which easily generates toxic by-products such as dichloroethylene and vinyl chloride is not used. The material shows more thorough dechlorination capability and higher electronic efficiency in the remediation of chlorinated hydrocarbon pollutants such as trichloroethylene, meanwhile, the dissolution amount of nickel ions is kept extremely low, and the material is environment-friendly. The invention provides a novel technical approach for developing a novel efficient and stable chlorohydrocarbon repair material without accumulation of byproducts.

A cleaning solvent mixture comprising an HCFO, for example, 1-chloro-2, 3, 3-trifluoropropene, and a solvent mixture comprising at least one of an organic solvent, an organic solvent, and an organic solvent, trans dichloroethylene; and a high boiling point HFE, such as HFE-7300; the cleaning solvent composition has the application as a non-flammable, low global warming potential, azeotrope-like cleaning solvent composition. The other solvent components may include a surfactant and a co-solvent. A method of removing soils from an article includes contacting the article with a solvent composition, or by contacting with a liquid and / or vapor solvent composition, such as in a conventional vapor degreaser device, in any suitable manner, such as a spray delivered by a propellant gas, and removing the composition from the article.

The application discloses a modified nylon material and a preparation method thereof, and belongs to the technical field of nylon materials. The modified nylon material comprises the following components in percentage by weight: a modified flame retardant 15-20 wt%; a lubricant 0.35-0.45 wt%; an antioxidant 0.31-0.40 wt%; and a filler 15-20 wt%; and the balance is a nylon 66 resin. The modified flame retardant is substituted by diphenyl phosphine and 1,2-dichloroethylene to form an intermediate 1, then tri-methoxy silane is added to the intermediate 1 by a silicon-hydrogen addition to form an intermediate 2, then the intermediate 2 is substituted by melamine to form an intermediate 3, and finally the intermediate 3 is hydrolyzed and condensed by using the multi-methoxy silane structure at the molecular end to coat the phosphorus-nitrogen structure in the middle of the molecule, so that the 'core-shell' composite structure is formed to protect the phosphorus-nitrogen structure from being damaged by high temperature, the mechanical properties and the thermal stability of the material are improved, and the flame-retardant efficiency is improved.

A composition includes particular amounts of methyl formate and a second solvent selected from acetone, acetonitrile, cyclopentanone, dimethyl carbonate, dimethyl formamide, dimethyl sulfoxide, 1,3-dioxolane, ethylene glycol monomethyl ether, gamma butyrolactone, isopropyl alcohol, methyl acetate, methylal, methyl glyoxal, propionaldehyde, propionic acid, n-propyl alcohol, propylene carbonate, 2-pyrrolidone, tetrahydrofuran, thioacetic acid, thiophene, transdichloroethylene, water, or a combination thereof. The composition can be particularly useful in removing a coating from a surface.

The invention relates to the technical field of polyurethane materials, in particular to a foaming agent composition, a composite material for polyurethane resin, the polyurethane resin and a preparation method and application of the polyurethane resin. The foaming agent composition provided by the invention is prepared from the following components in percentage by mass: 30%-67% of trans-dichloroethylene, 0.7%-6.5% of a first regulator, 2%-8.5% of a second regulator and 30%-56% of dibasic acid ester, the first regulator is selected from at least one of volatile halogenated hydrocarbon and a volatile epoxy compound; and the second regulator is selected from at least one of hydrofluorocarbon and hydrofluoroether. The foaming agent composition disclosed by the invention is relatively slow in foaming in a system, relatively thick foam holes are easily formed in rapidly-swelled polyurethane, and the surface compactness and hardness can be improved while relatively high internal physical properties are ensured, so that the foaming agent composition can be used for preparing a polyurethane outsole with low density, high hardness, good mechanical properties and a good paint spraying effect.

The invention discloses a non-combustible composition as well as a preparation method and application thereof, and belongs to the technical field of industrial cleaning. The invention relates to a high-temperature-resistant flame retardant, which is prepared from the following raw materials in percentage by weight: 70 to 91 percent of a first compound and 9 to 30 percent of a second compound, the first compound is an azeotrope of trans-1, 2-dichloroethylene and trans-decafluoro-3-hexene, and the second compound is a mixture of perfluorohexanone and tetrafluoroethyl trifluoroethyl ether; the preparation method comprises the following steps: 1) uniformly mixing T-DCE and trans-decafluoro-3-hexene to obtain a first compound; (2) uniformly mixing perfluorohexanone and tetrafluoroethyl trifluoroethyl ether, so as to obtain a second compound; 3, the first compound and the second compound are mixed and dissolved mutually to obtain the non-combustible compound.The non-combustible composition can solve the problems that gas-phase flammability of a T-DCE cleaning agent cannot be eliminated fundamentally, the cleaning efficiency is prone to being reduced, use stability is insufficient, and environmental protection and material compatibility is poor.

An aerosolized HVAC / R system solvent for decontaminating HVAC / R components and line sets. The solvent contains 25-90 wt % propellant, and 10-75 wt % solvent mixture which is about 60-95 wt % trans-1,2, dichloroethylene, about 5-20 wt % n-propanol, and an inerting constituent providing a weight percent ratio of the inerting constituent to n-propanol of less than 1.5. The solvent is packaged in a container that is connected to the HVAC / R components or line sets to be decontaminated for supplying the solvent mixture under pressure to the HVAC / R components or line sets.

The utility model relates to a recovery and purification device, in particular to a purification and recovery device for 1, 1-dichloroethylene production kettle bottom liquid. The heat exchanger is connected with a rectifying tower through a uniform buffer tank; a reboiler is arranged at the bottom of the rectifying tower; the top of the rectifying tower is connected with a temporary liquid storage tank through a condenser; the temporary liquid storage tank is connected with the rectifying tower through a return pipeline and is connected with a next working section through a low-boiling-point substance output pipeline; the top of the rectifying tower is connected with the heat exchanger and a jacket gas inlet of the uniform buffer tank through pipelines; and the heat exchanger and a jacket gas outlet of the uniform buffer tank are connected with the condenser through pipelines. A low-boiling-point substance evaporated from the top of a rectifying tower is introduced into a jacket of a heat exchanger and a uniform buffer tank to perform heat exchange and heating on a kettle bottom solution before entering the rectifying tower, the kettle bottom solution is heated for the first time through the heat exchanger, the kettle bottom solution is introduced into the uniform buffer tank to be heated, stirred and homogenized again, and then uniform and stable liquid is formed and then pumped into the rectifying tower to be treated.

The invention relates to a cleaning agent composition and a preparation method and a cleaning method thereof in the technical field of substrate cleaning, the cleaning agent composition comprises acid, tetrafluoroethyl trifluoroethyl ether, trans-dichloroethylene and an additive, and the additive is selected from at least one of a corrosion inhibitor and a polymerization inhibitor. The cleaning agent composition can effectively remove scaling powder on the DBC board, prevent oxidation of the DBC board and prolong the service life of the DBC board, and is low in cost.

An object of the present invention is to provide a solvent composition capable of coping with a wide range of stains from water-soluble stains to oil-soluble stains.SOLUTION: The present invention relates to a solvent composition containing at least one fluorine-based solvent (A) selected from the group consisting of (A-1) hydrofluoroether and (a- 2) cis-1-chloro, 3,3,3, - trifluoropropene, monohydric alcohols (B) having a boiling point of 180 °C or lower, and at least one compound (C) selected from the group consisting of (C-1) trans-1, 2-dichloroethylene, (C-2) esters, and (C-3) amide compounds.SELECTED DRAWING: None

The invention relates to a cleaning agent composition and a preparation method and a cleaning method thereof in the technical field of substrate cleaning, and the cleaning agent composition comprises trans-1, 2-dichloroethylene, 1, 1, 2, 2-tetrafluoroethyl-2, 2, 2-trifluoroethyl ether and fluorine-containing carboxylic acid. The cleaning agent composition has a good scaling powder cleaning effect and can effectively reduce the possibility that the surface of the substrate is corroded.

The invention discloses a preparation method of fluorinated alkene ether, which comprises the following steps: replacing alkene CFCl = CFCl in a 1, 2-difluorodichloroethylene method with hydrogen-containing fluorinated alkene CFH = CFX, carrying out fluorination reaction on the fluorinated alkene CFH = CFX, fluorine gas and fluorinated acyl fluoride (RCOF) under the action of a catalyst, and directly generating an intermediate (namely a fluorinated ether isomer mixture comprising RCF2OCFHCF2X and an isomer thereof RCF2OCFXCF2H) in one step, the intermediate continues to be subjected to a dehydrohalogenation reaction with alkali, and the product fluorinated alkene ether (RCF2OCF = CF2) is obtained. According to the method, synthesis, use and storage of an unstable intermediate, namely, hypofluoro acid ester RCF2OF with strong oxidation and high explosion risk can be effectively avoided, meanwhile, decomposition caused in the reaction process of special unstable raw material acyl fluoride such as ROCOF and fluorine gas can be reduced, and the safety is effectively improved; the problems of heavy metal use and pollution caused by a zinc powder dehalogenation process in a 1, 2-difluorodichloroethylene method are solved; the method has the advantages of short process flow, mild reaction conditions, environmental protection, high product purity and the like.

A sprayable composition includes a composition including at least one core component and at least one solvent. The at least one core component includes at least one polymer or resin and the solvent includes transdichloroethylene. The sprayable composition also includes a flammability reducer (3,3,3-trifluoropropene) and a gas propellant (carbon dioxide). The amount of gas propellant is in the range of about 8-20 wt % relative to the total amount of the sprayable composition.