The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 23, 2021
Filed:
Jul. 25, 2018
The Regents of the University of California, Oakland, CA (US);
Exxonmobil Research and Engineering Company, Annandale, NJ (US);
Jeffrey R. Long, Oakland, CA (US);
Simon Christopher Weston, Annandale, NJ (US);
Phillip J. Milner, Albany, CA (US);
Jeffrey D. Martell, Berkeley, CA (US);
Rebecca L. Siegelman, Berkeley, CA (US);
The Regents of the University of California, Oakland, CA (US);
ExxonMobil Research and Engineering Company, Annandale, NJ (US);
Abstract
Primary, secondary (1º,2º) alkylethylenediamine- and alkylpropylenediamine-appended variants of metal-organic framework are provided for COcapture applications. Increasing the size of the alkyl group on the secondary amine enhances the stability to diamine volatilization from the metal sites. Two-step adsorption/desorption profiles are overcome by minimizing steric interactions between adjacent ammonium carbamate chains. For instance, the isoreticularly expanded framework Mg(dotpdc) (dotpdc=4,4″-dioxido-[1,1':4′,1″-terphenyl]-3,3″-dicarboxylate), yields diamine-appended adsorbents displaying a single COadsorption step. Further, use of the isomeric framework Mg-IRMOF-74-II or Mg(pc-dobpdc) (pc-dobpdc=3,3-dioxidobiphenyl-4,4-dicarboxylate, pc=para-carboxylate) also leads to a single COadsorption step with bulky diamines. By relieving steric interactions between adjacent ammonium carbamate chains, these frameworks enable step-shaped COadsorption, decreased water co-adsorption, and increased stability to diamine loss. Variants of Mg(dotpdc) and Mg(pc-dobpdc) functionalized with large diamines such as N-(n-heptyl)ethylenediamine have utility as adsorbents for carbon capture applications.