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. 22, 2022
Filed:
Dec. 20, 2019
Lifeng Wang, Bryn Mawr, PA (US);
Bjorn Moden, West Chester, PA (US);
James Thomas Hughes, Devon, PA (US);
Hong-xin LI, Lansdale, PA (US);
Lifeng Wang, Bryn Mawr, PA (US);
Bjorn Moden, West Chester, PA (US);
James Thomas Hughes, Devon, PA (US);
Hong-Xin Li, Lansdale, PA (US);
Ecovyst, Inc, Malvern, PA (US);
Abstract
A metal-containing chabazite zeolite, which has an FTIR peak area ratio between the peak at 900-1300 cm(Si—O—Si asymmetric stretch) and the peak at 765-845 cm(˜805 cmis Si—O—Si symmetric stretch) of at least 55. A method for preparing metal-containing CHA zeolites with high SCR activity at low reaction temperatures from alkali cation-free reaction mixtures that contain the three OSDA structures: metal-polyamine, N,N,N-trimethyl-1-adamantyl ammonium (TMAda+) and TMAOH. The metal-containing CHA zeolites produced by the disclosed method can be identified by XRD, FTIR spectroscopy, FT-VIS spectroscopy, and scanning electron microscopy. A method of selective catalytic reduction of NOx in exhaust gas using the material described herein is also disclosed.