| 摘要 |
<p>A synthetic crystalline MFI-type zeolite and a method for preparing same are described. Said zeolite is characterized in that it has a) the approximate formula (I): M+(x+y) [Si¿(96-(x+y))? Alx Gay O192] ?(x + y)¿ , wherein M is an alkaline cation and/or an ammonium cation and/or a proton, x is a number between 0 and 24, y is a number between 0 and 24, and (x+y) is a number between 0.64 and 24, preferably between 1.88 and 19.2; b) an ammonium form having an X-ray diffraction pattern shown in table I of the description; and c) an ammonium form with a fluorine content of about 0.01-2.0 % wt., said zeolite having been synthesized in a fluoride medium in the absence of an organic agent.</p> |
