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. 23, 1981
Filed:
Jul. 21, 1977
Applicant:
Inventor:
Thomas V Whittam, Stockton on Tees, GB;
Assignee:
Imperial Chemical Industries Limited, London, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01B / ;
U.S. Cl.
CPC ...
423329 ; 2604 / ; 423328 ;
Abstract
Whereas previously zeolites of the ZSM-5 family have been synthesized in reaction mixtures in which the presence of alkylammonium ions was considered to be essential, the use of such ions can be avoided if the mixture contains a seed zeolite having a port diameter in the range 5.8 to 7.0. The seed zeolite need not be a member of the ZSM-5 family but can be, for example zeolite nu-1 which has a distinctly different structure. The reaction mixture preferably is limited in alkalinity and preferably contains strong acid anions.