Chemistry of inorganic compounds – Zeolite – Organic compound used to form zeolite
Reexamination Certificate
2006-08-14
2009-10-13
Kerns, Kevin P (Department: 1793)
Chemistry of inorganic compounds
Zeolite
Organic compound used to form zeolite
C423S709000, C423S712000, C423S716000, C423S708000, C502S077000
Reexamination Certificate
active
07601330
ABSTRACT:
The present invention relates to a process for producing a binder-free ZSM-5 zeolite in small crystal size. The invention is primarily used for solving the problems in the practical application, e.g., the zeolite powder is difficult to be recovered and easily inactivates and aggregates, and the addition of the binder in the shaping process will result in the reduction of effective surface areas and introduce the diffusional limitation. Said problems are better solved in the present invention by using diatomite or silica aerogel as the main starting material, adding a seed crystal orienting agent, a silica sol and sodium silicate for kneading and shaping, and then converting to integrative ZSM-5 in small crystal size by vapor-solid phase crystallization with organic amine and water vapor. Said process can be used in the industrial preparation of ZSM-5 molecular sieve catalyst in small crystal size.
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Wang et al. “Zeolitization of diatomite to prepare hierarchical porous zeolite materials through vapor-phase transport process.” Journal of Materials Chemistry, 2002, 12, 1812-1818.
Zeolitization of diatomite to prepare hierarchical porous zeolite materials through a vapor-phase transport process, Yajun Wang et al, Laboratory of Molecular Catalysis and Innovative Materials, Dept. of Chemistry, Fudon University, Shanghai 200433, PR China, J. Mater. Chem., 2002, 1812, pp. 1812-1818.
Zeolites and Mesoporous Materials at the Dawn of the 21st Century, 21-P-07 “The Zeolitisation of diatoms to create hierarchical pore structures,” S.M. Holmes et al., 2001, Studies in Surface Science and Catalysis, vol. 135, pp. 296. (8 pages).
Jiang Xinghua
Liu Zhongneng
Wang Deju
Zhao Jiang
Birch & Stewart Kolasch & Birch, LLP
China Petroleum & Chemical Corporation
Hevey John A
Kerns Kevin P
Shanghai Research Institute of Petroleum Technology SINOPEC
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