Citation: Yuyan Qiao, Pengfei Wu, Xiao Xiang, Miao Yang, Quanyi Wang, Peng Tian, Zhongmin Liu. SAPO-34 synthesized with n-butylamine as a template and its catalytic application in the methanol amination reaction[J]. Chinese Journal of Catalysis, ;2017, 38(3): 574-582. doi: 10.1016/S1872-2067(17)62775-X shu

SAPO-34 synthesized with n-butylamine as a template and its catalytic application in the methanol amination reaction

Yuyan Qiao ^a,b, ,
Pengfei Wu ^a,b ,
Xiao Xiang ^a,b ,
Miao Yang ^a ,
Quanyi Wang ^a ,
Peng Tian ^a ,
Zhongmin Liu ^a

a National Engineering Laboratory for Methanol to Olefins, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China;
b University of Chinese Academy of Sciences, Beijing 100039, China

Received Date: 28 November 2016
Revised Date: 25 December 2016

Fund Project: This work was supported by the National Natural Science Foundation of China(21676262, 21476228, 21506207) and the Key Research Program of Frontier Sciences of CAS (QYZDB-SSW-JSC040).

SAPO-34 was synthesized with n-butylamine (BA) as a template for the first time. Crystallization temperature and initial Si amount were important factors leading to successful syntheses. Lamellar AlPO-kanemite tends to form as the major phase or as an impurity of SAPO-34 at lower crystallization temperatures, though a higher initial Si amount may offer a positive effect on the crystallization of SAPO-34 that mitigates the low temperature. Higher temperature (240℃) can effectively suppress the generation of lamellar materials and allow the synthesis of pure SAPO-34 with a wider range of Si incorporation. The crystallization processes at 200 and 240℃ were investigated and compared. We used the aminothermal method to synthesize SAPO-34-BA at 240℃ and also found n-propylamine is a suitable template for the synthesis of SAPO-34. The SAPO-34-BA products were characterized by many techniques. SAPO-34-BA has good thermal stability, crystallinity and porosity. BA remained intact in the crystals with ~1.8 BA molecule per chabazite cage. The catalytic performance of SAPO-34 was tested in the methanol amination reaction, which showed high methanol conversion and selectivity for methylamine plus dimethylamine under the conditions investigated, suggesting that this material is a good candidate for the synthesis of methylamines.
- SAPO-34 molecular sieve,
- n-Butylamine,
- Primary amine,
- Synthesis,
- High temperature,
- Methanol amination
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