31 results about "Halogenated ether" patented technology

A method and system for the application of molecular sieves to the removal of carbon dioxide and carbon monoxide from the patient expired gases during anesthesia. The system is especially useful in anesthesia using any of the halogenated ether inhalation anesthetic agents. The expired gases are dried using a non-reactive desiccant to remove water, passed through a filter capable of removing particles larger than 0.3 microns, passed through a bed containing either natural or synthetic molecular sieves capable of removing carbon dioxide and carbon monoxide and then returned to the breathing circuit for recirculation to the patient.

A method and system for the application of molecular sieves to the removal of carbon dioxide and carbon monoxide from the patient expired gases during anesthesia. The system is especially useful in anesthesia using any of the halogenated ether inhalation anesthetic agents. The expired gases are dried using a non-reactive desiccant to remove water, passed through a filter capable of removing particles larger than 0.3 microns, passed through a bed containing either natural or synthetic molecular sieves capable of removing carbon dioxide and carbon monoxide and then returned to the breathing circuit for recirculation to the patient.

The invention provides a method for protecting electrodes of lithium-ion batteries, which comprises the following steps: immersing electrode materials in an electrolyte solution, then adding a halogenated ether solvent into the electrolyte solution, depositing a lithium salt additive on the surface of the electrodes, and then charging the electrodes Discharge to form an electrode protective film; the electrolyte includes a non-aqueous solvent, lithium salt and additives; the halogenated ether solvent is one or more of fluoroethers, chloroethers and brominated ethers . The invention utilizes the strong interaction between the fluorine-containing solvent and the non-aqueous solvent, so that the additive is “salted out” from the solvent and deposited on the surface of the electrode to form a uniform and stable protective layer, which participates in protecting the electrode during the cycle of the battery.

A method for preparing (per)fluorohalogenated ethers having the general formula (I): (R) n C(F) m OCAF-CA'F 2 (I), wherein: A and A', the same or different from each other, are chlorine or bromine, or one is selected from A, A' and hydrogen, and the other is a halogen selected from chlorine and bromine; R = fluorine or fluoro, It is preferably a perfluorinated substituent, and the substituent is selected from the following groups: linear or branched C 1 -C 20 Alkyl, more preferably C 1 -C 10 ;C 3 -C 7 cycloalkyl; aryl, C 6 -C 10 Arylalkyl, alkylaryl; C 5 -C 10 A heterocycle or an alkyl heterocycle; when R is a fluoro or perfluoroalkyl group, a cycloalkyl group, an arylalkyl group, or an alkylaryl group, the chain may optionally contain one or more oxygen atoms; When R is fluorinated, it may optionally contain one or more hydrogen atoms and / or one or more halogen atoms different from fluorine; n is an integer and is 1 or 2; m=3-n; the method is by At a reaction temperature of -120°C to -20°C, the liquid carbonyl compound of formula (II): (R) p C(F) q (O)(II), wherein: p is an integer and is 1 or 2; q is an integer and is 0 or 1; R is as defined above; reacts with elemental fluorine and an alkene compound of formula (III): CAF=CA'F( III), wherein A and A' are as defined above.

The invention discloses a method for synthesizing fluorine halogenated ether. The method comprises the following steps of: 1) adding ethylene glycol, solvent and catalyst into a reaction kettle, introducing tetrafluoroethylene with stirring and starting to react, wherein the mass ratio of tetrafluoroethylene to ethylene glycol is 1:(2-8), the mass ratio of the solvent to the ethylene glycol is (0.25-4.5):1, the mass ratio of the catalyst to the ethylene glycol is 1:(5-27), controlling reaction temperature to be 10 to 125 DEG C and reaction pressure to be 0.1 to 1.5MPa, stopping introducing tetrafluoroethylene, then cooling, discharging, and rectifying to obtain 2-(1,1,2,2-tetrafluoroethoxy) ethanol; and 2) reacting the 2-(1,1,2,2-tetrafluoroethoxy) ethanol which is obtained in the step 1) and a halogenating agent in a mass ratio of 1:(0.5-2) at the temperature of between 50 and 100 DEG C for 1 to 5 hours, cooling a reaction solution, washing, layering, and rectifying to obtain a product. The method is mild in reaction condition, low in cost, and in yield; and the product is high in quality.

In order to overcome the problems of positive electrode sulfur dissolution and polysulfide "shuttle effect" in existing lithium-sulfur batteries, the present invention provides an electrolyte, comprising a lithium salt and a non-aqueous solvent, and the non-aqueous solvent includes the structure shown in structural formula I. urea compounds and halogenated ether compounds represented by structural formula II; wherein, R 1 , R 2 , R 3 and R 4 Each is independently selected from H, halogen, hydrocarbon group with 1 to 10 carbon atoms or halogenated hydrocarbon group with 1 to 10 carbon atoms; A is selected from O or S; R 1 ' and R 2 ' are each independently selected from a hydrocarbon group having 1 to 10 carbon atoms or a halogenated hydrocarbon group having 1 to 10 carbon atoms, and R 1 ' and R 2 ' has at least one selected from halogenated hydrocarbon groups having 1 to 10 carbon atoms. Meanwhile, the present invention also discloses a metal-sulfur battery comprising the above electrolyte. The electrolyte provided by the invention can effectively inhibit the "shuttle effect" of polysulfides produced by the positive electrode of the metal-sulfur battery, thereby inhibiting the dissolution of sulfur; meanwhile, the electrochemical performance and safety performance of the metal-sulfur battery are improved.