70 results about "Dichloroethylenes" patented technology

Azeotropic or azeotrope-like compositions are disclosed. The azeotropic or azeotrope-like compositions are mixtures of E-1,1,1,4,4,5,5,5-Octafluoro-2-pentene with methyl formate, n-pentane, 2-methylbutane, 1,1,1,3,3-pentafluorobutane, trans-1,2-dichloroethylene, 1,1,1,3,3-pentafluoropropane, dimethoxymethane, cyclopentane or Z-1,1,1,4,4,4-hexafluoro-2-butene. Also disclosed is a process of preparing a thermoplastic or thermoset foam by using such azeotropic or azeotrope-like compositions as blowing agents. Also disclosed is a process of producing refrigeration by using such azeotropic or azeotrope-like compositions. Also disclosed is a process of using such azeotropic or azeotrope-like compositions as solvents. Also disclosed is a process of producing an aerosol product by using such azeotropic or azeotrope-like compositions as propellants. Also disclosed is a process of using such azeotropic or azeotrope-like compositions as heat transfer media. Also disclosed is a process of extinguishing or suppressing a fire by using such azeotropic or azeotrope-like compositions. Also disclosed is a process of using such azeotropic or azeotrope-like compositions as dielectrics. Also disclosed is a process for the separation of a chemical compound from a mixture of two or more chemical compounds using such azeotropic or azeotrope-like compositions.

Disclosed are non-flammable, high-solvency compositions having utility as cleaning agents in the electronics and refrigeration industries, and as a medium for mold release agents. The compositions are non-flammable by Flame Extension Test ASTM D-3065 and Flash Point-Tag Closed Cup Test ASTM D-56-82, and have a Kauri Butanol value of at least about 40 by ASTM 1133-94. The compositions comprise the components: a.) trans-1,2-dichloroethylene; and b.) solvent selected from: i.) oxygen-containing solvents selected from alcohols, ketones, esters, siloxanes, and ethers; and ii.) hydrocarbon solvents represented by C_tH_2t+2 or C_tH_2t, wherein t is from 4 to 8; and c.) an inerting agent selected from: i.) hydrofluorocarbon inerting agents represented by the formula C_xH_yF_(2x+2−y), wherein x is from 3 to 8, y is from 1 to 4, and the mole ratio of F/H in the hydrofluorocarbon inerting agent is greater than 1.6; ii.) hydrofluorocarbon ether inerting agents represented by the formula C_rF_2r+1OC_sH_2s+1, wherein r and s are independently selected from 1 to 6, and r is greater than or equal to 2s; and iii.) hydrochlorofluorocarbon inerting agents represented by the formulae C₂HCl₂F₃, C₂HClF₄, and C₃HCl₂F₅.

Disclosed is a mixture comprising the compound trans-1,1,1,4,4,4-hexafluoro-2-butene and at least one additional compound selected from the group consisting of HFOs, HFCs, HFEs, CFCs, CO2, olefins, organic acids, alcohols, hydrocarbons, ethers, aldehydes, ketones, and others such as methyl formate, formic acid, trans-1,2 dichloroethylene, carbon dioxide, cis-HFO-1234ze+HFO-1225yez; mixtures of these plus water; mixtures of these plus CO2; mixtures of these trans 1,2-dichloroethylene (DCE); mixtures of these plus methyl formate; mixtures with cis-HFO-1234ze+CO2; mixtures with cis-HFO-1234ze+HFO-1225yez+CO2; and mixtures with cis-HFO-1234ze+HFC-245fa. Also disclosed are methods of using and products of using the above compositions as blowing agents, solvents, heat transfer compositions, aerosol propellant compositions, fire extinguishing and suppressant compositions.

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 relates to a preparation method of 2-bromo-2,2-difluoroacetyl chloride and 2-bromo-2,2-difluoro acetate and a recycling method of waste difluoro trichloroethane. The preparation method comprises the following steps: with waste difluoro trichloroethane produced in the production process of dichlorotrifluoroethane as a raw material, carrying out dehydrochlorination to obtain difluoro dichloroethylene, carrying out addition reaction on difluoro dichloroethylene and bromine to obtain difluoro dichlone dibromoethane; reacting difluoro dichlone dibromoethane with sulfur trioxide to obtain 2-bromo-2,2-difluoroacetyl chloride; and reacting 2-bromo-2,2-difluoroacetyl chloride with alcohol or phenol to obtain 2-bromo-2,2-difluoro acetate series products. According to the preparation method and the recycling method, recycling of waste difluoro trichloroethane is realized; 2-bromo-2,2-difluoroacetyl chloride and 2-bromo-2,2-difluoro acetate are prepared by a temperature oscillation method, so that the production cost is reduced; and meanwhile, the preparation method is an environment-friendly technique for producing products.

A prepn. method for protective film of lithium ion cell. At least one organic polymer among phenolic resin, epoxy resin, polyvinyl acetate, polyurethane, polytetrafluoroethylene, chloronorgutta, phenolic chloronorgutta, epoxy polyamide and phenolic polyvinyl acetal is added into particular solvent selected at least one from diionized water, carbinol, benzene, toluene, chloroform dichloroethylene, diethyl ether, acetone, ethyl acetate and normal ethane, they are mixed and stirred to organic solution which is coated on case of lithium ion cell, then the case is static placed to volatilize particular solvent in the organic solution in room temp. to form a layer of uniform and densify protective film on cell case. Said film can prevent corrding of electrolyte and perspiration in prodn process. The invent is also relates to a solvent used for cleaning said proctive film selected from deionized water, alcohol, acetone, oxolane and formyldimethylamine.

The present invention relates, in part, to binary azeotropic compositions and mixtures including chlorotrifluoropropene and petroleum ether and to ternary azeotropic compositions and mixtures including chlorotrifluoropropene, methanol, and a third component selected from isohexane, trans-1,2-dichloroethylene, and petroleum ether. The present invention further relates to ternary azeotropic compositions and mixtures including chlorotrifluoropropene, cyclopentane, and a alcohol selected from methanol, ethanol, and isopropanol.

The invention relates to the technical field of fluorine-containing cleaning agents, and provides a halogenated olefin combined solvent containing 1-chloro-2, 3, 3-trifluoropropene. The halogenated olefin combined solvent is prepared from the following components in parts by mass: 3 to 90 parts of 1-chloro-2, 3, 3-trifluoropropene, 5 to 95 parts of trans-1, 2-dichloroethylene; and 0.2 to 5 parts of methyl perfluoroheptene ether. According to the invention, the synergistic effect of the three substances is utilized; azeotrope or approximate azeotrope can be formed, the obtained combined solventis stable, free of flash point, low in toxicity and corrosivity, good in material compatibility, good in dissolving and removing capacity for pollutants and high in volatilization drying speed, the ODP value (ozone consumption potential value) is zero, and the GWP value (global warming potential value) is extremely low. The invention also provides an application of the halogenated olefin combinedsolvent in a cleaning agent, a diluent and an aerosol.

Disclosed are binary azeotrope-like compositions consisting essentially of 1,1,1,3,3-pentafluorobutane (HFC-365mfc) and 1,1,1,2,3,4,4,5,5,5-decafluoropentane (HFC-43-10mee) or nonafluoromethoxybutane. The present invention further includes ternary or quaternary azeotrope-like compositions consisting essentially of 1,1,1,3,3-pentafluorobutane and 1,1,1,2,3,4,4,5,5-decafluoropentane or nonafluoromethoxybutane, and additionally trans-1,2-dichloroethylene, n-propyl bromide, acetone, methanol, ethanol or isopropanol.

The present invention relates to azeotropic or azeotrope-like compositions comprising a fluorinated olefin having the formula E- or Z-C₃F₇CH═CHC₃F₇, and at least one alcohol, halocarbon, hydrofluorocarbon, fluoroether, or alkanes and combinations thereof. In one embodiment, the one compound selected from the group consisting of alcohols, halocarbons, fluoroalkyl ethers, hydrofluorocarbons, alkanes is either methanol, ethanol, iso-propanol, n-propanol, trans-1,2-dichloroethylene, cis-1,2-dichloroethylene, n-propyl bromide, C₄F₉OCH₃, C₄F₉OC₂H₅, HFC-43-10mee, HFC-365mfc, heptane, or combinations thereof. In another embodiment, these compositions are useful in cleaning applications as a degreasing agent or defluxing agent for removing oils and/or other residues from a surface.

The invention relates to an electrothermal fly fragrant liquid which belongs to the field of fine chemical industry. The electrothermal fly fragrant liquid uses 2, 3, 5, 6-tetrafluoro-4-methoxy methyl benzyl (1R, 3S)-3-(2, 2 - dichloro vinyl)-2, 2-dimethyl cyclopropane carboxylic ester (Product Name: meperfluthrin) as an active ingredient with the content of 0.3%-6%, uses 0.05%-6.0% of di-tert-butylphenol as a stabilizer, a proper amount of a solvent accosting for about 60% to 97% of the total, a spice accosting for about 0.3% to 2%of the total is supplemented, an ancillary use device is matched for use, and the electrothermal fly fragrant liquid is stable in volatilization, smokeless, efficient and controllable.

An azeotropic composition a formulated with 1,1,1,3,3,3,-hexafluoro-2-methoxypropane and a second component selected from the group consisting of isopropyl alcohol, ethanol, methanol, and trans-1,2-dichloroethylene. The azeotropic composition exhibits a substantially constant boiling point at a constant pressure and is useful for various cleaning and degreasing applications.

The invention relates to a preparation method for 2,2-dichloro-1,2-dibrom-1,1-difluoroethane from 1,1-difluorine-1,2,2-trichloroethane at the presence of its 0.5-2.0% quaternary ammonium salt or quaternary phosphonium salt phase transition catalyst, through hydrogen chloride removal under alkaline condition at 0-80 deg. C to prepare 1,1-difluorine-2,2-dichloroethylene, charging 1.0-1.5 mol weight of bromine for reaction at 0-50 deg. C.

A provided acetylene purification interlocking control type trans-1,2-dichloroethylene preparation system comprises a synthesis tower, a regeneration tower, a mother liquor storage tank, a regeneration storage tank and a neutralization device, a tower bottom gas phase inlet of the synthesis tower is used for introducing acetylene gas, a tower bottom liquid phase inlet is connected with an outlet of the mother liquor storage tank, a tower top gas phase outlet of the synthesis tower is connected with a condenser for synthesis, a tower bottom gas phase inlet of the regeneration tower is used for introducing chlorine gas, and a tower top liquid phase inelt of the regeneration tower is connected with the regeneration storage tank. The neutralization device comprises a mixer, an oil-water separator, a neutralization liquid storage tank and an alkali liquor tank, the oil-water separator is connected with an outlet of a crude product tank, an oil phase outlet of the oil-water separator is connected with an inlet of the mixer, an outlet of the mixer is connected with the neutralization liquid storage tank, and a gas treatment device is further arranged at the front end of an acetylene gas feeding pipeline. According to the scheme, the cleanliness degree of gas entering the synthesis tower meets the process requirement, and meanwhile new chemical substances cannot be introduced.

The invention relates to the technical field of high polymer materials, in particular to a CPVC fire-fighting pipe and a preparation method thereof. The addition of an acrylic ester processing aid ACR in a CPVC resin formula system can lead to high torque of CPVC in the processing process and also lead to reduction of the vicat softening point of the CPVC fire-fighting pipe. In order to solve the problems, the CPVC fire-fighting pipe provided by the invention contains a self-made processing-aiding modifier, the processing-aiding modifier is obtained by copolymerizing vinyl chloride, vinylidene chloride and vinyl versatate as raw materials, and the chain structure of vinyl chloride and vinylidene chloride in the molecular structure of the processing-aiding modifier has good compatibility with CPVC, and the comprehensive performance of the CPVC fire-fighting pipe can be improved.

The invention relates to a dichloroethylene-acrylate copolymer emulsion and a preparation method thereof. The dichloroethylene-acrylate copolymer emulsion comprises 30-35% of dichloroethylene, 5-10% of an A-type reaction monomer, 0.5-2% of a B-type reaction monomer, 0.5-1% of a C-type reaction monomer, 0.001-0.01% of a reaction stabilizer, 0.5-1% of a reactive anionic emulsifier, 0.5-1% of a nonionic emulsifier, 0.00002% of an accelerant, 45-55% of deionized water and 0.05-0.3% of a redox initiator. Through the processes of pre-emulsion preparation, seed emulsion preparation, emulsion drop-by-drop-adding polymerization and curing, the defects of a conventional emulsifier are overcome, and the water resistance, the adhesive force and the salt spray resistance of a paint film are improved; and the environment-friendly emulsion with high molecular weight, paint film yellowing resistance, paint film strength and toughness is obtained by utilizing a redox reaction and adopting a formaldehyde-free reducing agent. The preparation system provided by the invention belongs to a strong acid type emulsion, can react with metal substrates such as a steel plate and the like, is beneficial to demulsification and base material combination of the emulsion in the film forming process, and further improves the compactness, water resistance and chemical resistance of the film.

The invention relates to the field of chemical engineering, and discloses a cleaning agent, which is prepared from the following components in percentage by weight: 5.0 to 20.0 percent of decafluoropentane, 25.0 to 92.0 percent of trans-dichloroethylene, 2.0 to 45.0 percent of fluoroether and 1.0 to 10.0 percent of a propellant. After trans-dichloroethylene and fluoroether are mixed, volatilization is fast, the cleaning power is high, safety and low toxicity are achieved, no flash point exists, environmental friendliness is achieved, and the cost is reduced. The decafluoropentane volatilization speed is high.

Compositions and methods for attracting, capturing and killing populations of cotton boll weevils (Anthonomus grandis Boh.) in boll weevil traps are disclosed. With respect to the attraction and capture of boll weevils with Grandlure, the synthetic pheromone of the cotton boll weevil, there is generally an increased number of boll weevils captured in the trap cylinder when an insecticide dispenser is included in the trap cylinder to kill the weevils and thus prevent their escape. Additionally, dead boll weevils are more accurately counted than live boll weevils. The compound dichlorvos (2,2-dichlorovinyl dimethyl phosphate or DDVP) is the most preferred among those few insecticides that can be used in traps for killing and preventing weevil escapes. This is also the preferred insecticide when combined with Grandlure in a single dispenser to kill boll weevils or inhibit their ability to develop normally and reproduce. The single Grandlure dichlorvos dispenser provides for significant savings in labor expenses in large area trapping and eradication programs and significantly reduces the disposal of waste materials from spent dispensers.

The invention relates to the technical field of textile products, in particular to mildew-proof wear-resistant cotton yarns and a manufacturing method thereof. The cotton yarns comprise the followingraw materials in parts by weight: 30-40 parts of cotton fibers, 10-15 parts of bamboo charcoal fibers, 10-20 parts of ramie fibers, 1-3 parts of a tea seed extract, 1-3 parts of ammonium bicarbonate,1-3 parts of sodium acyloxy bond sulfonate, 10-15 parts of nano zinc oxide, 1-2 parts of chlorine dioxide, 1-2 parts of n-dichloroethylene salicylamide, 2-5 parts of nano titanium dioxide and 5-8 parts of glycerol stearate. Firstly, the cotton fibers and the ramie fibers are subjected to impregnation treatment after crushing, the antibacterial effect of the fibers can be improved by treating slurry, and the strength and the sun resistance can be improved; and then, the two kinds of fibers are mixed, the characteristics of various fibers are neutralized, meanwhile, the antibacterial property isenhanced, the strength is high, the elasticity is good, the wear resistance, the corrosion resistance and the warm keeping property are good, the product quality is improved, and the cost is saved.

To provide an azeotropic composition, an azeotrope-like composition and a composition, which have little influence over the global environment, which are non-flammable, and which are less likely to undergo composition change even when evaporated and condensed repeatedly, and a detergent, a solvent and a heat transfer fluid, which contain the azeotropic composition, the azeotrope-like composition or the composition.

An azeotropic composition consisting essentially of 34.5 mass % of (Z)-1-chloro-2,3,3-trifluoropropene and 65.5 mass % of trans-1,2-dichloroethylene, and an azeotrope-like composition consisting essentially of from 28 to 41 mass % of (Z)-1-chloro-2,3,3-trifluoropropene and from 59 to 72 mass % of trans-1,2-dichloroethylene.