Xylene Isomer Separation Processes
    243.
    发明申请

    公开(公告)号:US20250128999A1

    公开(公告)日:2025-04-24

    申请号:US18690348

    申请日:2022-09-12

    Abstract: Advantaged separation of xylene isomers may be realized by separating o-xylene and other components, such as styrene, from an aromatic hydrocarbon mixture comprising m-xylene and p-xylene. Separation of xylene isomers may comprise: providing an aromatic hydrocarbon mixture comprising at least o-xylene, m-xylene, and p-xylene; separating the aromatic hydrocarbon mixture into a first stream enriched in o-xylene and lean in m-xylene and p-xylene relative to the aromatic hydrocarbon mixture, and a second stream enriched in m-xylene and p-xylene and lean in o-xylene relative to the aromatic hydrocarbon mixture; and separating the second stream into a third stream enriched in p-xylene and lean in m-xylene relative to the second stream and a fourth stream comprising m-xylene.

    TEMPERATURE MEASUREMENT OF CARBON COATED TRIBOLOGICAL TESTING APPARATUS

    公开(公告)号:US20250123197A1

    公开(公告)日:2025-04-17

    申请号:US18916454

    申请日:2024-10-15

    Abstract: Thermal imaging may be used for obtaining measurements of a tribological testing apparatus including a contact temperature. For example a method of calculating a contact temperature may include: introducing a testing sample into a contact zone of a tribological testing apparatus; engaging a testing operation of the tribological testing apparatus; measuring a contact emission of a testing surface of the tribological testing apparatus with an infrared camera; and calculating a contact temperature of the testing sample in the contact zone from the contact emission; wherein the tribological testing apparatus has a carbon coating on the testing surface of the contact zone, wherein the carbon coating has a first infrared emissivity, wherein the testing sample has a second infrared emissivity, and wherein the first infrared emissivity is within +/−20% of the second infrared emissivity.

    PITCH-BASED BICOMPONENT CARBON FIBERS

    公开(公告)号:US20250122648A1

    公开(公告)日:2025-04-17

    申请号:US18908509

    申请日:2024-10-07

    Abstract: Bicomponent carbon fibers may comprise an inner region that is at least partially surrounded by an outer sheath, each comprising at least one carbonized pitch. The inner region comprises 70 wt % or greater mesophase pitch that has been carbonized, and the outer sheath comprises up to 70 wt % mesophase pitch that has been carbonized. An amount of mesophase pitch in the outer sheath is lower than in the inner region. The bicomponent carbon fibers may be formed by extrusion of first and second pitch compositions having the requisite amounts of mesophase pitch, followed by carbonization.

    Full wavefield inversion of ocean bottom seismic data

    公开(公告)号:US12270961B2

    公开(公告)日:2025-04-08

    申请号:US16204368

    申请日:2018-11-29

    Inventor: Dennis E. Willen

    Abstract: A method of full wavefield inversion using simultaneous-source, ocean bottom sensor (OBS) data, including: obtaining, with a computer, simultaneous-source OBS data recorded by receivers in a seismic acquisition; generating, with a computer, synthetic OBS seismic data from a model based on reciprocity; blending, with a computer, the synthetic OBS seismic data; differencing, with a computer, the simultaneous-source OBS data recorded by receivers and the synthetic data to form a pseudo-deblended residual; updating the model based on the pseudo-deblended residual; and prospecting for hydrocarbons at a location derived from the updated model.

    Monitor-Centric Interpretation of Offset Pressure Monitoring Measurements

    公开(公告)号:US20250092780A1

    公开(公告)日:2025-03-20

    申请号:US18811051

    申请日:2024-08-21

    Abstract: A method for monitor-centric interpretation of offset pressure monitoring measurements includes simultaneously hydraulic fracturing treatment stages corresponding to treatment wells, measuring corresponding pressure data via pressure gauge(s) at monitor well(s), detecting pressure responses corresponding to fracture hits within the pressure data, and determining a reasonable velocity window for when a fracture originating from each treatment stage is likely to affect the pressure data. The method includes detecting treatment stage(s) that are likely to be the origin of each fracture hit based on the reasonable velocity window and, for each fracture hit that only has one likely originating treatment stage, assigning the detected fracture hit to such treatment stage. The method includes determining observation property data corresponding to the treatment stages that have been assigned to the fracture hits and iteratively assigning, based on such data, each unassigned fracture hit to one of the corresponding likely originating treatment stages.

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