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:
Oct. 05, 2004
Filed:
Mar. 13, 2002
Applicant:
Inventors:
Shivanand Janardan Kulkarni, Andhra Pradesh, IN;
Srinivasu Pavuuri, Andhra Pradesh, IN;
Narender Nama, Andhra Pradesh, IN;
Kondapuram Vijay Raghavan, Andhra Pradesh, IN;
Assignee:
Council of Scientific and Industrial Research, New Delhi, IN;
Primary Examiner:
Int. Cl.
CPC ...
C01B 3/940 ;
U.S. Cl.
CPC ...
C01B 3/940 ;
Abstract
The present invention provides an improved process for the preparation of ZSM-5 catalyst of the formula 3.25 Na O. Al O .30SiO .zH O where z=15-20 water molecules per unit cell by autoclaving a mixture of a pre-prepared seeding gel comprising a mixture of a alkali metal cation, an alkali hydroxide, and a silica source in water, and further amounts of silica source and an aluminium source in the presence of an organic solvent with water as a co-solvent.