发明申请
- 专利标题: Synthesis of Chabazite-Containing Molecular Sieves and Their Use in the Conversion of Oxygenates to Olefins
- 专利标题(中): 含有含异噻唑啉的分子筛的合成及其在烯烃转化中的应用
-
申请号: US13449424申请日: 2012-04-18
-
公开(公告)号: US20120202954A1公开(公告)日: 2012-08-09
- 发明人: Machteld M. Mertens , Stephen N. Vaughn , Guang Cao , Luc R.M. Martens , Mobae Afeworki
- 申请人: Machteld M. Mertens , Stephen N. Vaughn , Guang Cao , Luc R.M. Martens , Mobae Afeworki
- 主分类号: C08F10/02
- IPC分类号: C08F10/02 ; C08F10/06 ; C08F2/00
摘要:
In a method of synthesizing a silicoaluminophosphate molecular sieve having 90%+CHA framework type character, a reaction mixture is prepared comprising first combining a reactive source of aluminum with a reactive source of phosphorus to form a primary mixture that is aged. A reactive source of silicon and a template for directing the formation of the molecular sieve can then be added to form a synthesis mixture. Crystallization is then induced in the synthesis mixture. Advantageously, (i) the source of silicon comprises an organosilicate, (ii) the source of phosphorus optionally comprises an organophosphate, and (iii) the crystallized silicoaluminophosphate molecular sieve has a crystal size distribution such that its average crystal size is not greater than 5 μm. The molecular sieve can then preferably be used in a hydrocarbon (oxygenates-to-olefins) conversion process.