| Method and installation for producing carbon monoxide by cryogenic distillation -> Monitor Keywords |
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  Method and installation for producing carbon monoxide by cryogenic distillationRelated Patent Categories: Refrigeration, Cryogenic Treatment Of Gas Or Gas Mixture, Separation Of Gas MixtureThe Patent Description & Claims data below is from USPTO Patent Application 20070151291. Brief Patent Description - Full Patent Description - Patent Application Claims
[0001] The present invention relates to a method and an installation for producing carbon monoxide by cryogenic distillation. [0002] The synthesis gas produced by partial oxidation or by reforming often contains a percentage of nitrogen. [0003] All the percentages mentioned are mole percentages. [0004] It is known to reduce the percentage of nitrogen in the carbon monoxide produced by using a nitrogen and carbon monoxide separating column (EP-A-928936). [0005] It is one object of the present invention to provide a cryogenic separation installation for producing carbon monoxide substantially containing no nitrogen using fewer columns than the installations of the prior art. [0006] According to one object of the present invention, a method is provided for producing carbon monoxide by cryogenic distillation comprising the following steps: [0007] i) a gas mixture containing carbon monoxide, hydrogen and nitrogen is cooled and partially condensed to produce a cooled and partially condensed gas mixture [0008] ii) the cooled and partially condensed gas mixture is separated to produce a hydrogen-enriched gas and a carbon monoxide-enriched liquid [0009] iii) a stream of the carbon monoxide-enriched liquid is sent to a stripping column to produce hydrogen-free liquid carbon monoxide and hydrogen-enriched carbon monoxide gas [0010] iv) a stream of the hydrogen-free carbon monoxide is sent to a first intermediate level of a distillation column [0011] v) a liquid stream, richer in methane compared to the stream feeding to the distillation column, is withdrawn from the bottom of the distillation column [0012] vi) a carbon monoxide-rich stream is withdrawn from a second intermediate point, the second intermediate point being above the first intermediate point [0013] vii) a stream, enriched with nitrogen and optionally hydrogen compared to the stream feeding to the distillation column, is withdrawn from the top of the distillation column [0014] Optionally: [0015] the carbon monoxide-rich stream withdrawn from the distillation column is a liquid stream; [0016] a carbon monoxide cycle cools the top of the distillation column and/or heats the bottom of the distillation column and/or heats the bottom of the stripping column; [0017] cycle carbon monoxide is expanded in a turbine. [0018] According to a further object of the invention, an installation is provided for producing carbon monoxide by cryogenic distillation comprising: [0019] a) a heat exchanger for cooling and partially condensing a gas mixture containing carbon monoxide, hydrogen and nitrogen to produce a cooled and partially condensed gas mixture [0020] b) a separator for separating the cooled and partially condensed gas mixture to produce a hydrogen-enriched gas and a carbon monoxide-enriched liquid [0021] c) means for conveying the cooled and partially condensed gas mixture from the heat exchanger to the separator [0022] d) a stripping column and means for conveying at least part of the carbon monoxide-enriched liquid thereto [0023] e) means for withdrawing a hydrogen-enriched gas from the top of the stripping column and means for withdrawing a hydrogen-free liquid from the bottom of the stripping column [0024] f) a distillation column, means for sending a stream of the hydrogen-free liquid to a first intermediate point of the distillation column, means for withdrawing a bottom liquid from the distillation column, means for withdrawing an overhead gas from the distillation column and means for withdrawing an intermediate fluid at a second intermediate point of the distillation column, the second intermediate point being above the first intermediate point. [0025] Optionally: [0026] the distillation column has a top condenser and/or a bottom reboiler; [0027] the stripping column has a bottom reboiler; [0028] the column (columns) is (are) heated and/or cooled using a carbon monoxide gas cycle. [0029] The invention is described in greater detail with reference to the single FIGURE. [0030] In the FIGURE, a synthesis gas 1 containing 40% hydrogen, 58% carbon monoxide, 0.1% methane, 0.5% nitrogen and 1.3% argon. Continue reading... Full patent description for Method and installation for producing carbon monoxide by cryogenic distillation Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Method and installation for producing carbon monoxide by cryogenic distillation patent application. ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored. 3. Each week you receive an email with patent applications related to your keywords. Start now! - Receive info on patent apps like Method and installation for producing carbon monoxide by cryogenic distillation or other areas of interest. ### Previous Patent Application: Method for maximizing availability of heat exchangers for removal of volatile vapors from a storage vessel Next Patent Application: Vapor recovery process system Industry Class: Refrigeration ### FreshPatents.com Support Thank you for viewing the Method and installation for producing carbon monoxide by cryogenic distillation patent info. IP-related news and info Results in 0.20845 seconds Other interesting Feshpatents.com categories: Canon USA , Celera Genomics , Cephalon, Inc. , Cingular Wireless , Clorox , Colgate-Palmolive , Corning , Cymer , |
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