CRYSTALLINE MOLECULAR SIEVES AND RELATED STRUCTURE-DIRECTING AGENTS, METHODS AND SYSTEMS

摘要

A composition and method for preparing molecular sieves having a STW framework structure are described wherein a structure directing agent comprising quaternary cation 1,2,3,4,5-pentamethyl-1H-imidazol-3-ium is contacted with a source of an oxide of a first tetravalent element with or without a source of an oxide of another tetravalent elements and/or a source of a trivalent element in a molar ratio of tetravalent element: trivalent element 100:1 and greater.

主权项

1. A method for preparing an as-synthesized molecular sieve having a STW framework, the method comprising:
preparing a reaction mixture comprising: a first organic structure directing agent comprising an organic structure directing agent (1) and an organic or an inorganic anion; a source of an oxide of a first tetravalent element, optionally a source of fluoride, optionally a second organic structure directing agent, optionally a seed crystal of the molecular sieve and maintaining the reaction mixture for a time and under conditions to form the as-synthesized molecular sieve having the STW framework.