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:
Jun. 26, 2012
Filed:
Jun. 11, 2009
Yu-yuan Wang, Taipei, TW;
Chien-hsun Tsai, Taipei, TW;
Chi-hsing Tsai, Taipei, TW;
Formosan Union Chemical Corp., Taipei, TW;
Abstract
A method for synthesizing the all-silica zeolite beta with small crystal size is disclosed. This method comprises the steps of: (a) forming a reaction mixture comprising (1) a source of silicon dioxide (SiO), (2) a source of fluoride ions (F), (3) a source of tetraethylammonium cations (TEA), and (4) water (HO), at predetermined mole ratios of the source of silicon dioxide, the source of fluoride ions, the source of tetraethylammonium cations, and water; (b) crystallizing the reaction mixture; and (c) recovering the crystalline material formed, wherein the pH of the mixture before crystallization has a value of 6 to 9, and the pH of the mixture after crystallization has a value of 6 to 8. This improved method gives a fast and efficient way of synthesis of all-silica zeolite beta with an average crystal size of less than 5 μm.