公开(公告)号：US20250121357A1

公开(公告)日：2025-04-17

申请号：US18915696

申请日：2024-10-15

Applicant: EXXONMOBIL TECHNOLOGY AND ENGINEERING COMPANY

Inventor： David C. CALABRO ,  Shabab A. ABEDI ,  Hilda B. VROMAN ,  Peter I. RAVIKOVITCH ,  Giovanni M. MURARO ,  Scott J. WEIGEL

IPC: B01J20/32 ,  B01D53/02 ,  B01J20/26 ,  B01J20/28

Abstract: Methods are provided for making amine-functionalized organosilica materials that include additional amine functionalities that are grafted to the composition after the initial synthesis. Methods of using such materials are also provided. It has been discovered that additional aminosilyl groups can be grafted onto amine-functionalized organosilica materials under conditions that substantially preserve the original CO2 sorption capacity of the underlying organosilica material prior to grafting. This allows the additional amines in the grafted aminosilyl groups to increase the net capacity of the grafted material, as opposed to primarily replacing the original CO2 sorption capacity with the sorption capacity of the grafted amine functionalities.

公开(公告)号：US20250121354A1

公开(公告)日：2025-04-17

申请号：US18915673

申请日：2024-10-15

Applicant: EXXONMOBIL TECHNOLOGY AND ENGINEERING COMPANY

Inventor： David C. CALABRO ,  Shabab A. ABEDI ,  Quanchang LI ,  Joseph M. FALKOWSKI

IPC: B01J20/26 ,  B01D53/02 ,  B01J20/28 ,  B01J20/30

Abstract: Compositions corresponding to amine-functionalized organosilica materials are provided, along with methods of making such materials and methods of using such materials. The amine-functionalized organosilica materials are formed in part by using a single step synthesis process based on condensation of an alkoxy-substituted cyclic organosilane precursor in the presence of an aminosilane precursor so that an amine-functionalized polymer is formed. An acyclic alkoxy silane compound can also be used during the condensation to provide a secondary monomer that facilitates formation of the gel. The amine-functionalized organosilica materials are also formed in part by using at least one of a supercritical drying process and a freeze drying process. By using a supercritical drying process and/or a freeze drying process, an amine-functionalized organosilica material can be formed that has improved properties for sorption of CO2.