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:
Oct. 01, 2013
Filed:
Apr. 27, 2012
Tetsuya Uchikawa, Nagoya, JP;
Kenji Yajima, Nagoya, JP;
Tetsuya Uchikawa, Nagoya, JP;
Kenji Yajima, Nagoya, JP;
NGK Insulators, Ltd., Nagoya, JP;
Abstract
There is provided a process for producing a DDR-type zeolite having: a raw material solution preparation step of preparing a raw material solution containing 1-adamantaneamine hydrochloride, silica (SiO), and water at a 1-adamantaneamine hydrochloride/SiOmolar ratio of 0.002 to 0.5 and a water/SiOmolar ratio of 10 to 500, and a crystal growth step of subjecting the raw material solution and a DDR-type zeolite powder to a heat treatment in a state that both the raw material solution and the DDR-type zeolite powder are brought into contact with each other to grow crystals of the DDR-type zeolite by the use of the DDR-type zeolite powder as seed crystals.