Synthesis of molecular sieves having the chabazite framework type and their use in the conversion of oxygenates to olefins
申请人:Cao Guang
公开号:US20070043249A1
公开(公告)日:2007-02-22
The synthesis of a crystalline aluminophosphate or silicoaluminophosphate molecular sieve having a chabazite-type framework type is conducted in the presence of an organic directing agent having the formula (I)
[R
1
R
2
R
3
N—R
4
]
+
X
−
(I)
wherein R
1
, R
2
and R
3
are independently selected from the group consisting of alkyl groups having from 1 to 3 carbon atoms and hydroxyalkyl groups having from 1 to 3 carbon atoms; R
4
is selected from the group consisting of 4- to 8-membered cycloalkyl groups, optionally substituted by 1 to 3 alkyl groups having from 1 to 3 carbon atoms; 4- to 8-membered heterocyclic groups having from 1 to 3 heteroatoms, said heterocyclic groups being optionally substituted by 1 to 3 alkyl groups having from 1 to 3 carbon atoms and the heteroatoms in said heterocyclic groups being selected from the group consisting of O, N, and S; and aromatic groups optionally substituted by 1 to 3 alkyl groups, said alkyl groups having from 1 to 3 carbon atoms; and X
−
is an anion.
在有机引导剂的存在下,以具有方解石型骨架类型的结晶铝磷酸盐或硅铝磷酸盐分子筛的合成在以下化学式(I)[R1R2R3N—R4]+X−(I)中进行,其中R1、R2和R3分别选自由1至3个碳原子的烷基基团和1至3个碳原子的羟基烷基基团组成的群;R4选自由1至3个碳原子的烷基基团和1至3个碳原子的羟基烷基基团组成的群;R4选自由4至8个成员的环烷基基团,可选地由1至3个碳原子的烷基基团取代;由1至3个杂原子组成的4至8个成员的杂环基团,该杂环基团可选地由1至3个碳原子的烷基基团取代,且该杂环基团中的杂原子选自由O、N和S组成的群;和可选地由1至3个碳原子的烷基基团取代的芳香基团;X−是阴离子。