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:
May. 15, 2018
Filed:
Jun. 09, 2014
Applicant:
Tosoh Corporation, Yamaguchi, JP;
Inventor:
Yusuke Naraki, Yamaguchi, JP;
Assignee:
TOSOH CORPORATION, Yamaguchi, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01J 29/76 (2006.01); C01B 39/48 (2006.01); C01B 39/06 (2006.01); B01D 53/94 (2006.01); B01J 29/70 (2006.01); B01J 35/00 (2006.01); B01J 37/08 (2006.01);
U.S. Cl.
CPC ...
B01J 29/76 (2013.01); B01D 53/9418 (2013.01); B01J 29/70 (2013.01); B01J 35/002 (2013.01); B01J 37/08 (2013.01); C01B 39/06 (2013.01); C01B 39/48 (2013.01); B01D 2255/20761 (2013.01); B01D 2255/50 (2013.01); B01D 2257/404 (2013.01); B01D 2258/012 (2013.01);
Abstract
The present invention provides an LEV-type zeolite which is less likely than a conventional LEV-type zeolite to have reduced zeolite crystallinity even when exposed to high-temperature, high-humidity environments, particularly high-temperature, high-humidity environments of at least 700° C. The LEV-type zeolite has a molar ratio of silica to alumina of at least 20 and a molar ratio of silanol groups to silicon of at most 1.5×10. Such an LEV-type zeolite preferably has a silanol volume of at most 1.5×10/g.