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:
Dec. 02, 2008
Filed:
Sep. 07, 2005
Machteld Maria Mertens, Boortmeerbeek, BE;
Machteld Maria Mertens, Boortmeerbeek, BE;
ExxonMobile Chemical Patents Inc., Houston, TX (US);
Abstract
A process for manufacturing a silicoaluminophosphate molecular sieve, the process comprising the steps of: (a) dissolving a silicon source into in a template at conditions sufficient to form a solution having a silicon concentration of at least 0.05 wt. %; (b) adding at least one aluminium source and at least one phosphorus source to at least a portion of the solution of step (a) to form a synthesis mixture, wherein at least the major portion of the aluminum source and phosphorus source are added to the solution after the solution has reached a dissolved silicon concentration of at least 0.03 wt. %; and (c) treating the synthesis mixture for a period of time with mixing and at a temperature sufficient to form the silicoaluminophosphate molecular sieve, wherein the silicoaluminophosphate molecular sieve comprises at least one intergrown phase of molecular sieves having AEI and CHA framework types, wherein the intergrown phase has an AEI/CHA mass ratio of from about 5/95 to 40/60 as determined by DIFFaX analysis.