30 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.

The invention relates to a catalyst component for production of polyethylene with narrow molecular weight distribution, a catalyst and a preparation method thereof. The catalyst component comprises the reaction product of a magnesium halide/inorganic oxide carrier, an alcohol compound, a titanium compound and a halogenated ether compound. The catalyst has high activity when used for ethylene polymerization or copolymerization, and can be used for production of polyethylene resin with narrow molecular weight distribution.

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.

A dispensing apparatus (1) is provided comprising a fluid reservoir (4) and a valve (2). The fluid reservoir comprising a body which defines an internal volume which contains a fluid and the body comprising an open mouth.

The valve (2) is sealingly coupled to the body of the fluid reservoir (4) to close the open mouth and the valve comprises a gasket seal (18) which engages the body of the fluid reservoir.

The gasket seal (18) comprises an elastomer based on an ethylene-propylene-diene terpolymer, which terpolymer comprises from 45 to 55 wt. % ethylene, from 40 to 50 wt. % propylene, and ENB (ethylidenenorbornene) in an amount of 0.5 to 6 wt. %; and wherein the fluid comprises comprises a halogenated ether.

The invention discloses a method for preparing beta-halogenated ether and beta-halogenated alcohol through catalysis of peroxidase. The method comprises the following steps: adding hydrogen peroxide, halide salt and olefin as shown in a formula III into a buffer solution, finally adding peroxidase, and reacting to obtain the beta-halogenated alcohol as shown in a formula I; and also adding alcohol as shown in a formula IV into the reaction system to obtain the beta-halogenated ether as shown in a formula II; in the formula I, the formula II, a formula III and the formula IV, R1 is alkyl, phenyl, substituted phenyl, aryl or substituted aryl, R2 is hydrogen, alkyl, phenyl, substituted phenyl, aryl or substituted aryl, wherein R1 and R2 are connected to form a naphthenic base, and R3 is alkyl, phenyl, substituted phenyl, aryl or substituted aryl. According to the invention, the raw materials are simple and easy to obtain, the reaction condition is mild, the operation is simple and convenient, the used solvent is water, and compared with a conventional organic solvent, the method is greener and more environmentally friendly.

A process for preparing (per) fluorohalogenethers having general formula (I): (R)nC(F)mOCAF-CA'F2 wherein: A and A', equal to or different the one from the other, are Cl or Br or one is selected from A and A' and hydrogen and the other is halogen selected from Cl, Br; R = F, or a fluorinated, preferably perfluorinated, substituent, selected from the following groups: linear or branched C1-C20 alkyl more preferably C1-C10; C3-C7 cycloalkyl; aromatic, C6-C10 arylalkyl, alkylaryl; C5-C10 heterocyclic or alkylheterocyclic; when R is fluorinated or perfluorinated alkyl, cycloalkyl, arylalkyl, alkylaryl, it can optionally contain in the chain one or more oxygen atoms; when R is fluorinated it can optionally contain one or more H atoms and/or one or more halogen atoms different from F: n is an integer and is 1 or 2; m = 3-n; by reaction of carbonyl compounds having formula (II): (R)pC(F)q(O) wherein: p is an integer and is 1 or 2; q is an integer and is zero or 1, R is as above; in liquid phase with elemental fluorine and with olefinic compounds having formula (III): CAF=CA'F wherein A and A' are as above, at temperatures in the range from -120 DEG C to -20 DEG C.

The invention relates to a tobacco shred expanding agent. The tobacco shred expanding agent comprises the following components in percentage by mass: 49-98% of halogenated olefin; 1-50% of an ester compound; and 1-20% of halogenated ether or halogenated alcohol. The tobacco shred expanding agent provided by the invention has the advantages of the zero ODP value, the very low GWP value, the moderate boiling point, safety, low toxicity, incombustibility and volatility, and is very suitable for expanding tobacco shreds in the tobacco processing industry.

The invention discloses a synthesizing method of fluorine halogenated vinyl ether. The method includes the steps of firstly, adding alcohol, solvent and a catalyst into a reaction still, continuously introducing olefin for reaction, controlling the pressure of the reaction still by adjusting the introduction amount of olefin in the reaction process, stopping the introduction of olefin when the introduction flow of olefin is 0.5-1.5% of the initial introduction flow, and fine distilling reaction liquid to obtain fluorine-containing vinyl ether, wherein at least one of alcohol and olefin contains fluorine; secondly, making fluorine-containing vinyl ether and elemental halide react under illumination, and conducting alkaline washing and liquid separating on reaction liquid to obtain fluorine halogenated ether; thirdly, adding fluorine halogenated ether to a triethylamine solution of sodium alkoxide to react, and conducting liquid separating and fine distilling on reaction liquid to obtain fluorine halogenated vinyl ether. The method has the advantages that raw materials are easy to obtain, reaction conditions are mild and yield is high.

The present invention provides methods of using halogenated volatile compounds, e.g., halogenated ether, for treating a neurological disorder, e.g., Parkinson's disease.

The invention discloses a novel solvent which can be used for an electrolyte of a lithium secondary cell. The solvent is structurally characterized by being a sulfate compound and a derivative thereof, and the condensed structural formula is R1OSO2OR2, wherein R1 and R2 can be symmetric or asymmetric; R1 or R2 is an alkyl (but not virulent dimethyl sulfate), an ether chain, an aryl group, a halogenated alkyl group, a halogenated ether or a halogenated aryl group; the halogen is F, Cl or Br; the halogenation is partial or complete substitution. By using and containing the solvent, the high-temperature and low-temperature range of the electrolyte can be widened, and more choices can be provided for the solvent for a lithium ion battery; and the performance of a lithium ion battery, such as specific capacity, circularity and the like, can be affected less.

The invention provides a method for preparing 1,4-di-tert-butyl-2,5-bis(2-methoxyethoxy)benzene, the method comprising reacting 2,5-di-tert-butylbenzene-1,4-diol with cesium carbonate and halogenated ether in dimethyl formamide. The method yields 500 gram batches at a time, or multiples thereof. The method enables the industrial production of redox shuttles for use in lithium ion battery systems.

An anti-seizure composition includes a therapeutically effective combination of a halogenated ether, a benzodiazepine, and a barbiturate. The halogenated ether may selected from one or more of isoflurane, desflurane and sevoflurane. The benzodiazepine may be diazepam and the barbiturate may be phenobarbital. Also, a method for treating a seizure event may include administering a therapeutically effective amount of the combination.

The invention belongs to the field of metal surface cleaning, and particularly discloses an electroplating activating agent and a preparation method of the electroplating activating agent. The electroplating activating agent comprises, by weight, 10-80 parts of organic acid, 0.5-5 parts of inorganic acid, 0.1-2 parts of surfactants, 0.1-2 parts of additives, 0.1-2 parts of polyamide substances and0.2-1 part of ether substance. The combination of the organic acid and the inorganic acid can effectively remove an oxide film of a plated part. The polyamide substances including polyamide ether, polyamide sodium and polyamide potassium contain amido bonds, the amido bonds are functional groups with electronegativity and have the good hydrophilicity, and stains on the surface of the plated partcan be effectively removed. The ether substances including polyether polyol, halogenated ether and polyamide ether contain ether bonds, and the ether bonds are polar groups, and the adhesion effect isfacilitated.

In order to overcome problems of positive electrode sulfur dissolution and polysulfide ''shuttle effect''of the existing lithium-sulfur battery, the invention provides an electrolyte, the electrolyte comprises lithium salt and a non-aqueous solvent, and the non-aqueous solvent comprises a urea compound as shown in a structural formula I and a halogenated ether compound as shown in a structural formula II; R1, R2, R3 and R4 are independently selected from H, halogen, alkyl with the carbon atom number of 1-10 or halogenated alkyl with the carbon atom number of 1-10; A is selected from O or S; and R1'and R2 'are independently selected from alkyl with the carbon atom number of 1-10 or halogenated alkyl with the carbon atom number of 1-10, and at least one of R1' and R2 'is selected from halogenated alkyl with the carbon atom number of 1-10. Meanwhile, the invention also discloses a metal-sulfur battery comprising the electrolyte. The electrolyte provided by the invention can effectively inhibit a ''shuttle effect'' of polysulfide generated by a positive electrode of the metal-sulfur battery so that sulfur dissolution is inhibited; and meanwhile, the electrochemical performance and the safety performance of the metal-sulfur battery are improved.

A kind of is used for preparing -SO with general formula (I) ₂ Method for (per)fluorinated haloether of F group: FSO ₂ -R-CF ₂ OCAF-CA'F ₂ (I) in which: -A and A', the same or different from each other, are Cl or Br; -R has the following meaning: (per)fluorinated, preferably perfluorinated, optionally with one or more oxygen The substituting group of atom; The method is by the carbonyl compound FSO of formula (II) ₂ -R-COF (II) wherein R is as defined above; in the liquid phase reacts with elemental fluorine and an alkene compound of formula (III): CAF=CA'F (III) wherein A and A' are as defined above, the reaction is at -120 °C to -20 °C, optionally in the presence of solvent inert components under the reaction conditions. The description of this industrial invention is carried out in the name of SOLVAY SOLEXIS S.p.A. of Italy, whose head office is at Milano, Via Turati, 12.