Class 558/277 - Two identical or diverse alkyl groups bonded directly to the -O-C(=O)O- group (e.g., dimethyl carbonate, methyl ethyl carbonate, etc.)

Subclass of Class 558 - Organic compounds -- part of the class 532-570 series
Definition: Compound which contain two alkyl groups, identical or diverse,
No. of patents: 255
Last issue date: 04/03/2012

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Number	Title	Issue Date
8148566	Method for producing a dialkyl carbonate and a diol A method for producing a dialkyl carbonate and a diol, comprising: (a) effecting a transesterification reaction between a cyclic carbonate and an aliphatic monohydric alcohol in the presence of a transesterification catalyst, thereby obtaining a reaction mixture con...	04/03/2012
8058465	Process for industrially producing dialkyl carbonate and diol A process for industrially producing dialkyl carbonate and a diol continuously through a reactive distillation system is disclosed. The process includes the steps of taking a cyclic carbonate and an aliphatic monohydric alcohol as starting materials, continuously fe...	11/15/2011
8049028	Industrial process for separating out dialkyl carbonate It is an object of the present invention to provide a specific apparatus and process for using a single distillation column on a low boiling point reaction mixture containing a large amount of a dialkyl carbonate and an aliphatic monohydric alcohol produced through ...	11/01/2011
7919645	High shear system and process for the production of acetic anhydride A system and method for a high shear mechanical device incorporated into a process for the production of acetic anhydride as a reactor device is shown to be capable of decreasing mass transfer limitations, thereby enhancing the process. A system for the production o...	04/05/2011
7803961	Process for manufacturing dimethyl carbonate A method of forming a dialkyl carbonate stream, includes obtaining a byproduct stream from a diaryl carbonate formation reaction that has alkanol, residual dialkyl carbonate, and residual aromatic compound. This byproduct stream is introduced to a distillation colum...	09/28/2010
7799940	Process for manufacturing dimethyl carbonate The present invention provides methods of forming dialkyl carbonate wherein catalyst buildup in the reaction equipment, the separation equipment, and transfer lines there between is reduced and even eliminated. In one embodiment, the method includes introducing alka...	09/21/2010
7799939	Process for production of dialkyl carbonate and diol It is an object of the present invention to provide, for a case of producing a dialkyl carbonate and a diol from a cyclic carbonate and an aliphatic monohydric alcohol, a process that simultaneously satisfies the cyclic carbonate conversion being high, the selectivi...	09/21/2010
7790914	Method for dimethyl carbonate synthesis There is provided a catalyst for dimethyl carbonate synthesis which has a high conversion rate under the supercritical condition of CO2 and can be handled easily. The catalyst for dimethyl carbonate is obtained by loading SO42− or ...	09/07/2010
7763745	Process for the production of dialkyl carbonate and alkanediol An alkylene carbonate and an alkanol are subjected to transesterification to yield a dialkyl carbonate and alkanediol in a process comprising (a) introducing the alkylene carbonate and an alkanol feedstock into a reaction zone to react in the presence o...	07/27/2010
7732630	Process for the preparation of an alkanediol and a dialkyl carbonate An alkanediol and a dialkyl carbonate are prepared in a process comprising: (a) reacting an alkylene carbonate and an alkanol feedstock in a reaction zone under transesterification conditions to obtain a product mixture of dialkyl carbonate, unconverted...	06/08/2010
7718820	Process for the preparation of an alkanediol and a dialkyl carbonate An alkanediol and a dialkyl carbonate are prepared in a process comprising: (a) reacting an alkylene carbonate and an alkanol feedstock in a first reaction zone under transesterification conditions to obtain a product mixture of dialkyl carbonate, uncon...	05/18/2010
7645896	Method for producing a dialkyl carbonate and a diol A method for producing a dialkyl carbonate and a diol, comprising: (a) effecting a transesterification reaction between a cyclic carbonate and an aliphatic monohydric alcohol in the presence of a transesterification catalyst, thereby obtaining a reaction mixture con...	01/12/2010
7622602	Method for preparing a dialkyl carbonate, and its use in the preparation of diaryl carbonates and polycarbonates A method of making a dialkyl carbonate comprises: reacting, in a reactor comprising tantalum, an alkanol, oxygen, and carbon monoxide, in the presence of a catalyst. The reaction occurs in a mixture comprising a liquid phase wherein the liquid phase comprises about ...	11/24/2009
7605285	Method and device for manufacturing dimethyl carbonate The present invention provides a method and apparatus for producing dimethyl carbonate, wherein carbon dioxide is recovered from combustion exhaust gas of a steam reformer 10 and a boiler; and some of the recovered carbon dioxide is used for methanol synthesi...	10/20/2009
7563919	Process for the preparation of an alkanediol and a dialkyl carbonate An alkanediol and a dialkyl carbonate are prepared in a process comprising: (a) contacting an alkylene carbonate with an alkanol feedstock under transesterification conditions in a reactive distillation zone to obtain a top stream comprising dialkyl car...	07/21/2009
7518012	Process for the preparation of dialkyl carbonate The present invention provides a process for the preparation of dialkyl carbonates of general formula (1) wherein R=alkyl (C1-C8) or C6H5CH2	04/14/2009
7504527	Low corrosive integrated process for preparing dialkyl carbonates An integrated process for the production of a dialkyl carbonate and a diol from an alkylene oxide, carbon dioxide and an aliphatic monohydric alcohol is described in which an alkylene oxide is first reacted with carbon dioxide in the presence of a halogen-free carbo...	03/17/2009
7491837	Low corrosive integrated process for preparing dialkyl carbonates An integrated process for the production of a dialkyl carbonate and a diol from an alkylene oxide, carbon dioxide and an aliphatic monohydric alcohol is described in which an alkylene oxide is first reacted with carbon dioxide in the presence of a halogen-free carbo...	02/17/2009
7385070	Method for the catalytic conversion of alkylene carbonate A method for catalytic conversion of alkylene carbonate, wherein alkylene carbonate is contacted with C1-C5 aliphatic alcohol and/or water in the presence of Mg, Al mixed (hydr) oxide catalyst having a Mg:Al molar ratio in the range of from 4 t...	06/10/2008
7351848	Method and apparatus for preparing a dialkyl carbonate, and its use in the preparation of diaryl carbonates and polycarbonates Unexpected corrosion of downstream sections of a dialkyl carbonate manufacturing apparatus has been traced to alkyl chloroformate impurities, which slowly decompose to yield hydrochloric acid. An improved process and apparatus for dialkyl carbonate synthesis reduce ...	04/01/2008
7345187	Method and apparatus for preparing a dialkyl carbonate, and its use in the preparation of diaryl carbonates and polycarbonates Unexpected corrosion of downstream sections of a dialkyl carbonate manufacturing apparatus has been traced to alkyl chloroformate impurities, which slowly decompose to yield hydrochloric acid. An improved process and apparatus for dialkyl carbonate synthesis reduce ...	03/18/2008
7342141	Process for the preparation of alkanediol The invention provides a process for the preparation of alkanediol comprising the steps: (i) contacting alkylene oxide with carbon dioxide in the presence of a carbonation catalyst to obtain a reaction mixture containing alkylene c...	03/11/2008
7326323	High capacity purification of thermally unstable compounds Separations processes and apparati capable of purifying thermally sensitive materials at high capacity. An apparatus having a rectification section and a stripping section with the stripping section having a stripping tray with 5 to 50% open area, a pressure drop fr...	02/05/2008
7314947	Process for making dialkyl carbonates A process for the production of dialkyl carbonates from the reaction of alcohol, for example C1-C3 alcohols, with urea is disclosed wherein the water and ammonium carbamates impurities in the feed are removed in a prereactor. The water is react...	01/01/2008
7295425	Molding for electrolytic capacitor anode element, molding with substratum, production methods therefor, and production method for electrolytic capacitor anode element The present invention provides a molding having excellent workability and a production method therefore. In addition, the present invention provides a molding with which a capacitor element having excellent electric properties can be obtained, and which has excellen...	11/13/2007
7279592	Process for making dialkyl carbonates A process for the production of dialkyl carbonates from the reaction of alcohol, for example C1-C3 alcohols, with urea is disclosed wherein the water and ammonium carbamates impurities in the feed are removed in a prereactor. The water is react...	10/09/2007
7271120	Catalyst for the synthesis of dimethyl carbonate from urea and methanol, preparation and use thereof A catalyst for the preparation of dimethyl carbonate from urea and methanol having a composition on weight base of: active component of from 20 to 50 wt %, and carrier of from 80 to 50 wt %, and prepared by equal-volume spraying and impregnating method is disclosed....	09/18/2007
7256049	Devices and methods for separating phospholipids from biological samples Device and methods for the removal of phospholipids from biological samples are disclosed and described. Removal of phospholipids may be desirable for the analysis of the phospholipids themselves, or to prevent the phospholipids from conflicting with and effectively...	08/14/2007
7214644	Cross-coupling reactions A method for producing a copper/palladium colloid catalyst useful for Suzuki couplings. ...	05/08/2007
7145029	Low corrosive integrated process for preparing dialkyl carbonates An integrated process for the production of a dialkyl carbonate and a diol from an alkylene oxide, carbon dioxide and an aliphatic monohydric alcohol is described in which an alkylene oxide is first reacted with carbon dioxide in the presence of a halogen-free carbo...	12/05/2006
7145045	Process for the preparation of alkanediol The invention relates to a process for the preparation of alkanediol, which process involves (a) contacting alkylene oxide with carbon dioxide in the presence of catalyst to obtain a first liquid reaction mixture containing cyclic carbonate, (b) optionally removing ...	12/05/2006
7112229	Process for producing biodiesel fuel using triglyceride-rich oleagineous seed directly in a transesterification reaction in the presence of an alkaline alkoxide catalyst An integrated process is described for producing biodiesel from oleaginous seeds, preferably castor bean seeds. The inventive process includes a transesterification reaction where the seeds themselves react with anhydrous ethyl alcohol in the presence of an alkaline...	09/26/2006
7112693	Process for producing aliphatic oligocarbonate diols The present invention relates to a process for producing an aliphatic oligocarbonate diol comprising a) reacting an aliphatic diol with dimethyl carbonate at an elevated pressure in a reaction mixture, and b) subsequently removing unreacted methanol and dimethyl car...	09/26/2006
7094917	Processes for refining compositions containing dialkyl carbonates Processes for refining dialkyl carbonate-containing compositions are described, wherein a composition comprising a dialkyl carbonate is provided; and the composition is subjected to a rectification wherein low-boiling impurities are removed, and a rectification wher...	08/22/2006
7084292	Integrated process for preparing dialkyl carbonates with a circulating catalyst An integrated process for the production of a dialkyl carbonate and a diol from an alkylene oxide, carbon dioxide and an aliphatic monohydric alcohol is described in which an alkylene oxide is first reacted with carbon dioxide in the presence of a homogeneous carbon...	08/01/2006
7074951	Process for making dialkyl carbonates A process for the production of dialkyl carbonates from the reaction of alcohol, for example C1–C3 alcohols, with urea is disclosed wherein the water and ammonium carbamates impurities in the feed are removed in a prereactor. The water is rea...	07/11/2006
7052657	Method for controlling reaction and controlling apparatus While supplying methanol and carbon monoxide via feed lines 17 and 19, respectively, to a liquid phase reaction system 3 including a carbonylation catalytic system, and maintaining a substantially constant liquid level of the reaction system, pa...	05/30/2006
7049457	Use of an ionic halide free copper catalyst for the production of dialkyl carbonates A non-corrosive process for the preparation of dialkyl carbonate by reacting carbon monoxide, alkanol and an oxygen-containing gas in the presence of a ionic halogen free copper catalyst. ...	05/23/2006
7022295	Installation for carrying out a three phase chemical reaction under pressure A gas siphon type reactor (10) is used to carry out a three phase chemical reaction under pressure, such as the reduction of uranyl nitrate to uranous nitrate by hydrogen, in the presence of a catalyst made up of platinum on a silica carrier. The control of t...	04/04/2006
6989459	In situ process for preparing quaternary ammonium bicarbonates and quaternary ammonium carbonates Applicant has discovered an in situ method of preparing quaternary ammonium methocarbonate salts and quaternary ammonium alkylcarbonate salts in high yield from tertiary amines, methanol, and at least one of a cyclic carbonate, an aliphatic polyester (such as a poly...	01/24/2006

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Class 558/277 - Two identical or diverse alkyl groups bonded directly to the -O-C(=O)O- group (e.g., dimethyl carbonate, methyl ethyl carbonate, etc.)