Ethane recovery and ethane rejection methods and configurations

    公开(公告)号:US10451344B2

    公开(公告)日:2019-10-22

    申请号:US15259354

    申请日:2016-09-08

    Inventor: John Mak

    Abstract: Contemplated plants for flexible ethane recovery and rejection by allowing to switch the top reflux to the demethanizer from residue gas to the deethanizer overhead product and by controlling the flow ratio of feed gas to two different feed gas exchangers. Moreover, the pressure of the demethanizer is adjusted relative to the deethanizer pressure for control of the ethane recovery and rejection.

    TWO-STAGE ABSORPTION FOR ACID GAS AND MERCAPTAN REMOVAL

    公开(公告)号:US20190292474A1

    公开(公告)日:2019-09-26

    申请号:US16437539

    申请日:2019-06-11

    Abstract: A system for processing a gas stream can include an acid gas removal unit comprising a first absorber unit, a compressor, and a second absorber unit. The first absorber unit is configured to receive a feed gas stream containing organic sulfur species and acid gas components, remove at least a portion of the organic sulfur species and acid gas components using a semi-rich solvent at a first pressure, produce a semi-treated gas stream, and produce a rich solvent stream. The compressor unit is configured to compress the semi-treated gas stream from the first pressure to a higher second pressure. The second absorber unit is configured to receive the compressed semi-treated gas stream, remove at least a portion of any organic sulfur species and acid gas components present in the compressed semi-treated gas stream using a lean solvent, produce the semi-rich solvent stream, and produce a treated gas stream.

    Process for treatment of sour water generated from coal gasification

    公开(公告)号:US10351456B2

    公开(公告)日:2019-07-16

    申请号:US15372010

    申请日:2016-12-07

    Inventor: Raj Bhadra Singh

    Abstract: A method of treating sour water from industrial processes such as coal gasification. The method includes injecting a polysulfide into a sour water stream to convert cyanide to thiocyanate, thereby reducing the corrosiveness and toxicity of the sour water stream. The method also includes the step of mixing the sour water stream with a reactant to remove CO2 in its various forms in a reaction tank and subsequently routing the stream to a solid settler. The method further includes adjusting the pH of the sour stream in a pH correction tank before sending the sour water stream through a stream stripper for H2S and/or NH3 removal. After passing through the stripper, the treated sour water stream is sent to a biological treatment process for thiocyanate and formate removal. Subsequent treatment steps can be applied, such as multi-grade filters and activated carbon filters, to prepare the treated sour water for reuse.

    Process for removing oxygenates from hydrocarbon streams

    公开(公告)号:US10160921B2

    公开(公告)日:2018-12-25

    申请号:US15901550

    申请日:2018-02-21

    Inventor: Jan Dierickx

    Abstract: A system for removing oxygenates from a hydrocarbon stream includes a caustic wash unit comprising a plurality of caustic wash loops, and a hydrogenation reactor. The hydrogenation reactor is configured to receive a first gaseous stream from a first caustic wash loop of the plurality of caustic wash loops and pass a second gaseous stream from the hydrogenation reactor to a second caustic wash loop of the plurality of caustic wash loops, wherein the hydrogenation reactor comprises a sulfided catalyst.

    NONDESTRUCTIVE DETERMINATION OF TOUGHNESS OF METAL, PLASTIC, AND COMPOSITE MATERIALS

    公开(公告)号:US20180217104A1

    公开(公告)日:2018-08-02

    申请号:US15746774

    申请日:2016-07-22

    Inventor: Barry Messer

    Abstract: Embodiments relate generally to systems and methods for determining a toughness value for a material of a metal part, wherein the method comprises detecting a texture of a carbon steel material using an ultrasonic microscopy unit, wherein the ultrasonic microscopy unit uses one or more waveforms including at least one of straight beam, phased array, shear wave, and time-of-flight diffraction (TOFD); determining elemental analysis of the carbon steel material; combining the texture with the elemental analysis to generate a toughness value for the steel; comparing the generated toughness value with a standard curve, wherein when the toughness value falls below the curve, the carbon steel material comprises an acceptable toughness, and when the toughness value falls above the curve, the carbon steel material comprises an unacceptable toughness.

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