Publication number: 20250222443
Abstract: The present invention discloses a crystalline aluminosilicate small-pore zeolite having a maximum ring size of eight tetrahedral atoms, wherein the zeolite comprises copper, wherein the Cu:Al atomic ratio is between 0.12 and 0.55; and a metal M1, which is calcium, magnesium, or strontium, wherein the M1:Cu atomic ratio is between 0.05 and 0.95; and a metal M2, wherein M2 is selected from magnesium, calcium, barium, strontium, yttrium, titanium, zirconium, niobium, iron, zinc, silver, lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium and mixtures thereof, and wherein M1 and M2 are different from one another, and wherein the M2:Cu atomic ratio is between 0.05 and 0.80; and wherein the sum of the atomic ratios of copper, metal M1 and metal M2 to aluminum, (Cu+M1+M2):Al, is between 0.20 and 0.80; and wherein the zeolite comprises at least 2.5 wt.
Type:
Application
Filed:
March 23, 2023
Publication date:
July 10, 2025
Inventors:
Fei Wen, Ruediger Hoyer, Frank-Walter Schuetze, Yvonne Demel, Stephan Eckhoff