TRANSITION METAL-CARRYING ZEOLITE AND PRODUCTION METHOD THEREFOR, AND NITROGEN OXIDE PURIFICATION CATALYST AND METHOD FOR USING SAME
FIG1 is a chart diagram showing an XRD pattern of an AEI-type zeolite used in Examples 1 and 2 and Comparative Examples 1 and 4
The pre-reaction mixture was charged in a 1000-ml stainless autoclave equipped with a fluororesin inner cylinder, and reacted (for hydrothermal synthesis) therein at 180°C with stirring at 150 rpm for 24 hours. After the hydrothermal synthesis reaction, the reaction liquid was cooled and the formed crystal was collected through filtration. The collected crystal was dried at 100°C for 12 hours, and the resultant zeolite powder was analyzed through XRD, which confirmed synthesis of an AEI-type zeolite 1 that shows an XRD pattern with a peak and a relative intensity at the position shown in Table 2, in terms of lattice spacing. The XRD pattern of the zeolite 1 is shown in FIG1. The Si/Al molar ratio determined by XRF analysis was 5.5.Table 22 Theta/°d-spacing (Å)Relative Intensity [100 × I/I(0)]9.55729.2510010.69368.271816.17315.483416.94435.233017.24875.142219.70434.511120.75964.283321.4094.152423.98643.712526.13763.411527.86263.201331.29242.861732.22592.7811
chart diagram
35
aqueous
30
preferably
1
preferably
20
preferably
40
Snowtex
25
preferably
10
preferably
1000
unit volume
15
preferably less than days with rotation
200
liquid after washing reaches
['1. A transition metal-loaded zeolite, comprising zeolite having a structure designated as AEI or AFX according to a code system defined by International Zeolite Association (IZA), and containing at least a silicon atom and an aluminum atom in the framework structure thereof, and a transition metal M loaded thereon; and satisfying the following (1) and (2): (1) a ratio of absorption intensity based on ultraviolet-visible-near infrared spectroscopy (UV-Vis-NIR), which is obtained according to the following expression (I), is less than 0.4;  Intensity 32,500 cm − 1 / Intensity 12,500 cm -1 (2) a peak intensity obtained according to ammonia temperature-programmed desorption (NH 3 -TPD) exists in at least each of a range of 200°C to 400°C and a range of 450°C to 600°C and the ratio of the maximum peak intensity in the range of 200°C to 400°C to the maximum peak intensity in the range of 450°C to 600°C (NH 3 -TPD 200∼400 /NH 3 -TPD 450∼600 ) is 1.0 or more and 2.0 or less.']