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. 27, 2015
Filed:
Nov. 08, 2013
Peter I. Ravikovitch, Princeton, NJ (US);
Barbara Carstensen, Annandale, NJ (US);
Charanjit S. Paur, South Bound Brook, NJ (US);
Ivy D. Johnson, Lawrenceville, NJ (US);
Harry W. Deckman, Clinton, NJ (US);
Peter I. Ravikovitch, Princeton, NJ (US);
Barbara Carstensen, Annandale, NJ (US);
Charanjit S. Paur, South Bound Brook, NJ (US);
Ivy D. Johnson, Lawrenceville, NJ (US);
Harry W. Deckman, Clinton, NJ (US);
EXXONMOBIL RESEARCH AND ENGINEERING COMPANY, Annandale, NJ (US);
Abstract
Methods are provided for forming zeolite crystals suitable for gas phase separations with transport characteristics that are stable over time. The zeolitic materials and/or corresponding methods of synthesis or treatment described herein provide for improved stability in the early stages of process operation for some types of gas phase separations. The methods allow for synthesis of DDR type zeolites that have reduced contents of alkali metal impurities. The synthetic methods for reducing the non-framework alkali metal atom or cation impurity content appear to have little or no impact on the DDR crystal structure and morphology.