| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 568681000 | Halogen containing | 25 |
| 20120238782 | METHODS FOR PRODUCING ALLYL CHLORIDE AND DICHLOROHYDRIN - A method for producing allyl chloride is provided which includes: a chlorination step of reacting propylene with chlorine to obtain a reaction product containing allyl chloride, unreacted propylene and by-product hydrogen chloride; a separation step of cooling the reaction product to separate the reaction product into the allyl chloride and a mixed gas containing the unreacted propylene and the by-product hydrogen chloride; a collection step of separating the mixed gas into the unreacted propylene and the by-product hydrogen chloride to collect the unreacted propylene; and an oxidation step of oxidizing the separated by-product hydrogen chloride to obtain chlorine. At least part of the chlorine used in the chlorination step is the chlorine obtained in the oxidation step. A method for producing dichlorohydrin using the chlorine obtained in the oxidation step is also provided. | 09-20-2012 |
| 568682000 | Purification or recovery | 9 |
| 20080214875 | Purification of Fluoromethyl 1,1,1,3,3,3-Hexafluoroisopropyl Ether (Sevoflurane) - Crude sevoflurane product comprising unacceptably high levels of HFIP can be purified by combining the crude sevoflurane product with sufficient water to produce a multiphase mixture, fractionally distilling the multiphase mixture, and removing substantially pure sevoflurane from the distilling multiphase mixture. It is emphasized that this abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader quickly to ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the appended issued claims. | 09-04-2008 |
| 20090275785 | Distillation Method For The Purification Of Sevoflurane And The Maintenance Of Certain Equipment That May Be Used In The Distillation Process - Processes for preparing commercial quantities of a stable, pharmaceutically acceptable sevoflurane substantially tree of impurities are claimed. In another embodiment, a process for removing reactive metal, salts from the surface of metallic equipment used in the distillation of sevoflurane and rendering a non-inert metallic surface of the metallic equipment inert. | 11-05-2009 |
| 20100280283 | Distillation Method for the Purification of Sevoflurane and the Maintenance of Certain Equipment that May be Used in the Distillation Process - Processes for preparing commercial quantities of a stable, pharmaceutically acceptable sevoflurane substantially free of impurities are claimed. In another embodiment, a process for removing reactive metal salts from the surface of metallic equipment used in the distillation of sevoflurane and rendering a non-inert metallic surface of the metallic equipment inert. | 11-04-2010 |
| 20110098511 | METHOD OF PREPARING FLUORINE-CONTAINING ETHER - There is provided a method of preparing a high purity fluorine-containing ether which inhibits a side reaction generating an unsaturated bond and assures low cost and simple steps. When preparing the fluorine-containing ether by allowing a fluorine-containing alkyl alcohol to react with a fluorinated olefin in the presence of a basic compound, a reaction is terminated at a stage before a conversion ratio of the fluorine-containing alkyl alcohol reaches 75%. | 04-28-2011 |
| 20110282104 | NOVEL ALKYL PERFLUOROALKENE ETHERS - Disclosed are compositions comprising a compound having the formula CF | 11-17-2011 |
| 20120083629 | METHOD FOR PRODUCING FLUORINE-CONTAINING ETHER WITH HIGH PURITY - The present invention provides a method for efficiently producing a highly pure fluoroether containing remarkably low concentration of a fluorine-containing alkyl alcohol. The method is suited for scale-up and specifically includes performing countercurrent separation of a crude solution of fluoroether including a fluorine-containing alkyl alcohol as an impurity using water. | 04-05-2012 |
| 20130046117 | PROCESS FOR THE MANUFACTURING OF SEVOFLURANE - The present invention provides a method for forming sevoflurane comprising (i) combining chlorosevo ether, a nucleophilic fluoride reagent, and a solvent comprising sevoflurane to form an initial reaction mixture and (ii) reacting the initial reaction mixture to form additional sevoflurane relative to the amount of sevoflurane present in the initial reaction mixture. The present disclosure is also directed to a method for forming sevoflurane, comprising: initiating a reaction between chlorosevo ether and a nucleophilic fluoride reagent in an initial reaction mixture further comprising a solvent comprising sevoflurane, thereby forming additional sevoflurane relative to the amount of sevoflurane present in the initial reaction mixture. | 02-21-2013 |
| 20150376100 | METHOD FOR RECOVERING FLUORINE-CONTAINING ETHER - An object of the present invention is to provide a method for recovering a fluorine-containing ether capable of recovering a fluorine-containing ether used for producing a fluoropolymer, in higher recovery yield and in a shorter time. The present invention relates to a method for recovering a fluorine-containing ether, including the steps of: producing a wet fluoropolymer by suspension polymerization, solution polymerization, or bulk polymerization in the presence of at least a specific fluorine-containing ether; vaporizing and discharging vaporizable substances including the fluorine-containing ether by heating the wet fluoropolymer in a container; and transferring the vaporizable substances in the vaporized state to a cooling means to cool the vaporizable substances. | 12-31-2015 |
| 20160096793 | SYSTEMS AND METHODS FOR GAS TREATMENT - A system and process for the recovery of at least one halogenated hydrocarbon from a gas stream. The recovery includes adsorption by exposing the gas stream to an adsorbent with a lattice structure having pore diameters with an average pore opening of between about 5 and about 50 angstroms. The adsorbent is then regenerated by exposing the adsorbent to a purge gas under conditions which efficiently desorb the at least one adsorbed halogenated hydrocarbon from the adsorbent. The at least one halogenated hydrocarbon (and impurities or reaction products) can be condensed from the purge gas and subjected to fractional distillation to provide a recovered halogenated hydrocarbon. | 04-07-2016 |
| 568683000 | Fluorine | 15 |
| 20080306309 | Separation/Purification of Desflurane from Hydrogen Fluoride - An azeotrope comprising desflurane (CF | 12-11-2008 |
| 20090043133 | Fluorinated nonionic surfactants - A compound comprising Formula I, or a mixture thereof, | 02-12-2009 |
| 20090171128 | Process for the Purification of Fluoromethyl 1,1,1,3,3,3-Hexafluoroisopropyl Ether (Sevoflurane) - A process for purifying crude fluoromethyl 1,1,1,3,3,3-hexafluoroisopropyl ether (sevoflurane). The crude sevoflurane is repeatedly washed with water under conditions and for a time sufficient to reduce the level of 1,1,1,3,3,3-hexafluoroisopropanol (HFIP) to no more than 200 ppm or no more than 100 ppm. | 07-02-2009 |
| 20100004490 | PROCESS FOR THE PREPARATION OF CHLOROMETHYL 2,2,2-TRIFLUORO-1-(TRIFLUOROMETHYL) ETHYL ETHER - The present invention refers to a process for the preparation of chloromethyl 2,2,2-trifluoro-1-(trifluoromethyl) ethyl ether (sevochlorane), which consists of reacting hexafluoroisopropanol with: a formaldehyde equivalent selected between paraformaldehyde or 1,3,5-trioxane, a chlorinating agent selected from the group consisting of oxalyl chloride, phosphorus trichloride, phosphorus pentachloride, phosphorus oxychloride, sulfuryl chloride and thionyl chloride, and a strong acid selected from the group consisting of concentrated or fuming sulfuric acid. Said process provides sevochlorane in high purity and yield, which can be converted to sevoflurane by known means. | 01-07-2010 |
| 20100185020 | PROCESS FOR PRODUCTION OF 1,2,2,2-TETRAFLUOROETHYL DIFLUOROMETHYL ETHER (DESFLURANE) - The present invention provides a continuous process for the production of 1,2,2,2-tetrafluoroethyl difluoromethyl ether (desflurane) which comprises feeding continuously optimum molar quantities of 1-chloro-2,2,2-trifluoroethyl difluoromethyl ether (CF | 07-22-2010 |
| 20110105803 | METHOD OF SYNTHESIZING SEVOFLURANE - The present invention provides a method of synthesizing sevoflurane, which comprises the following steps: taking hexafluoro isopropanol as the starting material and reacting it with trioxymethylene (or paraformaldehyde) in the presence of acid to generate dihexafluoro isopropanol formal derivatives, adding anhydrous aluminum trihalide to generate halomethyl 2,2,2-trifluoro-1-(trifluoromethyl)ethyl ether, then reacting the halomethyl compound with metal fluoride to form the sevoflurane. The method is of low cost, and the reaction condition is easy to implement, and produces sevoflurane in large scale. | 05-05-2011 |
| 20110257440 | METHOD OF PRODUCING FLUOROMETHYL 1,1,1,3,3,3-HEXAFLUOROISOPROPYL ETHER - The present invention provides a preparation method of fluoromethyl 1,1,1,3,3,3-hexafluoroisopropyl ether by reacting CH | 10-20-2011 |
| 20120022296 | Method for the preparation of sevoflurane - A method for the preparation of (CF | 01-26-2012 |
| 20120041237 | Process for Producing Fluoromethyl Hexafluoroisopropyl Ether - There is provided according to the present invention a process for producing fluoromethyl hexafluoroisopropyl ether ((CF | 02-16-2012 |
| 568684000 | Additional diverse halogen containing | 1 |
| 20140336419 | BIS(1,1-DICHLORO-3,3,3-TRIFLUOROPROPYL) ETHER AND PROCESS FOR PREPARING THE SAME - The present invention provides a symmetrical ether compound which is chlorinated in the α position and which is useful as an intermediate for medicine and pesticides and as a raw material or a synthetic intermediate for producing a fluorine-containing compound, in particular a bis(1,1-dichloro-3,3,3-trifluoropropyl)ether represented by formula [1] which is obtained by chlorinating a bis(3,3,3-trifluoropropyl)ether. This bis(1,1-dichloro-3,3,3-trifluoropropyl)ether is produced by chlorinating, preferably under ultraviolet light irradiation, a bis(3,3,3-trifluoropropyl)ether. | 11-13-2014 |
| 568685000 | Carbon to carbon unsaturation containing | 5 |
| 20100267995 | METHODS FOR PREPARING FLUORINATED VINYL ETHERS - A method for preparing a fluorinated vinyl ether compound comprising reacting a fluorinated ether substrate having (i) a hydrogen atom on a carbon atom that is alpha to an etheric oxygen and (ii) a fluorine atom on a carbon atom that is beta to the etheric oxygen, with an organolithium base to provide a reaction product comprising a fluorinated vinyl ether compound. | 10-21-2010 |
| 20110098512 | Method for manufacturing perfluorovinylethers - A process for the manufacture of a perfluorovinylether by hydrodehalogenation of a halofluoroether (HFE) having general formula (I-A) or (I-B): | 04-28-2011 |
| 20130178659 | NOVEL FLUORINE-CONTAINING VINYL ETHER COMPOUND AND METHOD FOR PRODUCING THE SAME - A fluorine-containing vinyl ether compound of the formula: C | 07-11-2013 |
| 20130324769 | Method for manufacturing perfluorovinylethers - The invention pertains to a process for the manufacture of a perfluorovinylether by hydrodehalogenation of a halofluoroether (HFE) having general formula (I-A) or (I-B): | 12-05-2013 |
| 20140330046 | Method for Preparing Fluorine-Containing Vinyl Ether - Provided is a method for preparing fluorine-containing vinyl ether. The method comprises: carrying out hydrolytic neutralization on a small molecular weight byproduct which is produced in the process of preparing perfluoropolyether or a perfluorinated surfactant by photooxidation of fluorine-containing olefin; and obtaining fluorine-containing vinyl ether by drying and cracking. The byproduct produced in the process of preparing perfluoropolyether or the perfluorinated surfactant is utilized, thereby solving the emission problem of industrial wastes, reducing environment pollution, and generating available fluorine-containing vinyl ether. | 11-06-2014 |
