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. 10, 2016
Filed:
Nov. 19, 2010
Keiji Itabashi, Tokyo, JP;
Tatsuya Okubo, Tokyo, JP;
Kenta Iyoki, Tokyo, JP;
UniZeo Co., Ltd., Tokyo, JP;
The University of Tokyo, Tokyo, JP;
Abstract
A method for producing an MTW-type zeolite, comprising (1) mixing an alumina source, an alkali source, a lithium source, and water so as to obtain a reaction mixture (2) Adding a seed crystal of an MTW-type zeolite before or while a silica source is added to the reaction mixture in a proportion of 0.1 to 20% by weight relative to the silica component in the reaction mixture. Mixing and stirring the reaction mixture. Wherein the MTW-type zeolite of the seed crystal has a SiO/AlOratio of 10 to 500 and does not contain an organic compound. The reaction mixture has a composition represented by the following molar ratios: SiO/AlO=12 to 200, NaO/SiO=0.1 to 0.3, LiO/(NaO+LiO)=0.05 to 0.5 and HO/SiO=10 to 50. (3) Air tightly heating the reaction mixture, to which the seed crystal of the MTW type zeolite has been added, at 100 to 200° C.