Molecular sieves and related methods and structure directing agents
申请人:Archer Raymond
公开号:US08562942B2
公开(公告)日:2013-10-22
Method for preparing molecular sieves and molecular sieves obtained thereby are described. The method includes preparing a reaction mixture, comprising a structure directing agent, at least one source of at least one oxide of a tetravalent element, optionally, one or more sources of one or more oxides selected from the group consisting of oxides of trivalent elements, pentavalent elements, and mixtures thereof, optionally, at least one source of an element selected from Groups 1 and 2 of the Periodic Table; and optionally, hydroxide ions or fluoride ions, and maintaining the reaction mixture under conditions sufficient to form crystals of the molecular sieve. In the method, various imidazolium cations are used as the structure directing element.
Physicochemical Properties and Catalytic Behavior of the Molecular Sieve SSZ-70
作者:Raymond H. Archer、John R. Carpenter、Son-Jong Hwang、Allen W. Burton、Cong-Yan Chen、Stacey I. Zones、Mark E. Davis
DOI:10.1021/cm9035677
日期:2010.4.27
SSZ-70 is synthesized using 1,3-bis(isobutyl)imidazolium, 1,3-bis(cyclohexyl)imidazolium, and 1,3-bis(cycloheptyl)imidazolium structure directing agents (SDAs), and the solids obtained are characterized by powder X-ray diffraction (XRD), Si-29 magic angle spinning nuclear magnetic resonance (MAS NMR), electron microscopy, nitrogen and hydrocarbon adsorption, and thermogravimetric analyses. The physicochemical properties of SSZ-70 show that it is a new molecular sieve that has similarities to MWW-type materials The catalytic behavior of SSZ-70 is evaluated through the use of the constraint index (Cl) test. Distinct differences in the reactivity between Al-SSZ-70 and SSZ-25 (MWW) are observed and are the consequences of the structural differences between these two molecular sieves.
[EN] MOLECULAR SIEVES AND RELATED METHODS AND STRUCTURE DIRECTING AGENTS<br/>[FR] TAMIS MOLÉCULAIRES ET PROCÉDÉS APPARENTÉS ET AGENTS DE DIRECTION DE STRUCTURE
申请人:CALIFORNIA INST OF TECHN
公开号:WO2010118377A2
公开(公告)日:2010-10-14
Methods for preparing molecular sieves and molecular sieves obtained thereby are described. The method including preparing a reaction mixture, comprising a structure directing agent, at least one source of at least one oxide of a tetravalent element, optionally, one or more sources of one or more oxides selected from the group consisting of oxides of trivalent elements, pentavalent elements, and mixtures thereof, optionally, at least one source of an element selected from Groups 1 and 2 of the Periodic Table; and optionally, hydroxide ions or fluoride ions, and maintaining the reaction mixture under conditions sufficient to form crystals of the molecular sieve. In the method, various imidazolium cations are used as the structure directing element.