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:
Nov. 15, 2016
Filed:
Aug. 02, 2011
Applicants:
Kenji Yajima, Nagoya, JP;
Hisayoshi Nonaka, Nagoya, JP;
Inventors:
Kenji Yajima, Nagoya, JP;
Hisayoshi Nonaka, Nagoya, JP;
Assignee:
NGK Insulators, Ltd., Nagoya, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01B 39/48 (2006.01); B01J 29/70 (2006.01); C01B 37/02 (2006.01); C01B 39/04 (2006.01);
U.S. Cl.
CPC ...
C01B 37/02 (2013.01); B01J 29/70 (2013.01); C01B 39/04 (2013.01); C01B 39/48 (2013.01); Y10T 428/2982 (2015.01);
Abstract
There is provided a DDR-type zeolite powder composed of fine particles and exhibits a particle size distribution where the majority of the particles have particle diameters converging in the vicinity of the mean particle diameter, and a process for the production of the same. Specifically provided is a process for the production of a DDR-type zeolite powder, which comprises a step of heat-treating a raw material solution at 100 to 180° C., and thereby growing crystals until the mean particle diameter reaches to a level of 0.1 μm or more and below 2.5 μm.