Advances in SAPO-11 molecular sieve in alkane isomerization;

On the basis of the conventional hydrothermal method,the small crystal SAPO-11 molecular sieves with sub-micron size were synthesized by controlling the aging conditions of the synthesis gel and without using other organic additives except for the template.

The silicoaluminophosphate SAPO-11 molecular sieve was synthesized by the hydrothermal crystallization method in the presence of fluoride ions and characterized by(X-ray) diffraction,scanning electron microscopy,N_2 adsorption,Fourier transform infrared reflectance spectroscopy,and temperature-programmed desorption of adsorbed NH_3.

A series of NiW/SAPO-11 catalysts with various Ni and W contents were prepared by co-impregnation,and catalysts were characterized by means of XRD,FTIR and BET.

This study describes the technology that hydrocracking recycle oil is isodewaxed with SAPO-11 zeolite base catalyst, which is synthesized in 3 litre kettle.

H2-TPR,NH3-TPD,pulse adsorption of hydrogen and H2-O2 titration were employed to analyze and correlate the platinum dispersity on Pt/SAPO-11 catalyst with preparation of the catalyst and performance of skeletal isomerization of n-C12 alkane.