公开(公告)号：US20240157283A1

公开(公告)日：2024-05-16

申请号：US18504380

申请日：2023-11-08

Applicant: EXXONMOBIL TECHNOLOGY AND ENGINEERING COMPANY

Inventor： Bennett D. MARSHALL ,  Simon C. WESTON ,  Aaron W. PETERS

IPC: B01D53/06

CPC classification number: B01D53/06 ,  B01D2256/10 ,  B01D2257/504 ,  B01D2259/4009 ,  B01D2259/404

Abstract: Systems and methods are provided for using a multi-stage capture process for capture of CO2 from air. A first or initial sorption process is used to sorb CO2 from air. After sorption from the air is complete, the desorption step of the initial stage is used to form a secondary CO2-containing stream that is passed into one or more additional sorption stages. This secondary CO2-containing stream can be at a concentration of roughly 1.0 vol % or more. Sorption of CO2 from the secondary CO2-containing stream is performed using a different contacting method, such as a contacting method that is higher efficiency. The second or later CO2 sorption stage can produce a CO2-containing output stream with a CO2 concentration of 80 vol % or more, or 90 vol % or more, or 95 vol % or more. This high purity output stream can then be sequestered and/or used for further processing.

公开(公告)号：US20240383836A1

公开(公告)日：2024-11-21

申请号：US18785629

申请日：2024-07-26

Applicant: EXXONMOBIL TECHNOLOGY AND ENGINEERING COMPANY

Inventor： Matthew T KAPELEWSKI ,  Simon C. WESTON ,  Catherine A. FALER

IPC: C07C51/295

Abstract: Systems and methods are provided for synthesizing multi-ring disalicylate linkers. The systems and methods can allow for synthesis of disalicylate linkers while using a reduced or minimized amount of solvent (such as down to potentially having no separate solvent) in the reaction environment. The synthesis can be performed by starting with a compound such as 4,4′-biphenol as a starting reagent. The 4,4′-biphenol (and/or other alcohol-substituted biphenyl compound) can then be exposed in a reaction environment to pressurized CO2 in the presence of a base. The temperature and pressure in the reaction environment can be increased to achieve either supercritical conditions for the CO2 (based on a phase diagram for neat CO2) and/or sub-critical conditions that are substantially similar to supercritical conditions. This can allow for conversion of the 4,4′-biphenol (or other alcohol-substituted biphenyl compound) into a multi-ring disalicylate linker.