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:
Jan. 26, 2021
Filed:
Jun. 04, 2020
Exxonmobil Chemical Patents Inc., Baytown, TX (US);
Marc H. Anthonis, Hofstade, BE;
Antonie Jan Bons, Vlaams-Brabant, BE;
Machteld M. Mertens, Boortmeerbeek, BE;
ExxonMobil Chemical Patents Inc., Baytown, TX (US);
Abstract
A method of synthesising a molecular sieve of DDR framework type. The method comprises: preparing a synthesis mixture capable of forming a molecular sieve of DDR framework type, said synthesis mixture comprising water, a silicon source, optionally a source of a trivalent element X, optionally a source of a pentavalent element Z, optionally a source of hydroxide ions, optionally a source of a metal cation M, a structure directing agent, and seed crystals having a framework type selected from CHA and LEV; said synthesis mixture being substantially free from fluoride ions; heating said synthesis mixture under static crystallization conditions for a time sufficient to form crystals of said molecular sieve of DDR framework type, said crystallization conditions including a temperature of from 100° C. to 220° C.; and, recovering said crystals of the molecular sieve of DDR framework type from the synthesis mixture.