Effect of water on the ionothermal synthesis of molecular sieves.
AlPO4-11 and AlPO4-5 molecular sieves are ionothermally prepared without addition of water by using anhydrous starting materials, such as NH4H2PO4, pseudoboehmite (AlOOH), and NH4F. The synthesis appears to be an autocatalytic process. Water has a remarkable effect on the synthesis process. Addition of reagent quantities of water (H2O/Al = 1, molar ratio) can enhance the crystallization kinetics greatly.
Dalian Institute of Chemical Physics, Dalian 116023, China.
Huaijun
H
Ma
Zhijian
Z
Tian
Renshun
R
Xu
Bingchun
B
Wang
Ying
Y
Wei
Lei
L
Wang
Yunpeng
Y
Xu
Weiping
W
Zhang
Liwu
L
Lin