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:
Apr. 18, 2000
Filed:
Jan. 13, 1998
Azuma Yamamoto, Toyohashi, JP;
Akira Takahashi, Nagoya, JP;
Takuya Hiramatsu, Nagoya, JP;
Kenji Suzuki, Nagoya, JP;
NGK Insulators, Ltd., , JP;
Abstract
A process for synthesizing a high-silica aluminosilicate molecular sieve, includes: subjecting, to hydrothermal synthesis, a raw material containing Al, H, O and Si and, as other elements, at least Fe and having a Si/Al molar ratio of 50 or more and a Si/Fe molar ratio of 80 or less (45 or less when a high-silica aluminosilicate molecular sieve having a .beta. type zeolite structure is produced) and then subjecting the resulting material to heat treatment in an oxidizing atmosphere at 300.degree. C. or more. The above process can synthesize a high-silica zeolite low in Al content directly without dealumination operation, and can provide process simplification and a higher yield.