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. 22, 2008
Filed:
Dec. 22, 2003
Applicants:
Wha-jung Kim, Gyeonggi, KR;
Shin-dong Kim, Seoul, KR;
Inventors:
Wha-Jung Kim, Gyeonggi, KR;
Shin-Dong Kim, Seoul, KR;
Assignee:
SK Corporation, Seoul, KR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C01B 39/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
Disclosed is a method of preparing ZSM-5 having substantially 100% crystallinity by using variable temperatures in the absence of an organic template, characterized in that a reaction mixture having a molar composition of MO/SiO(M: alkali metal ion) of 0.07-0.14, HO/SiOof 15-42 and SiO/AlOof 20-100 is nucleated at relatively high temperatures (180-210° C.) and then crystallized at relatively low temperatures (130-170° C.), thus easily controlling a crystal size and a particle size distribution of the ZSM-5.