Chemistry of inorganic compounds – Zeolite – Seed used
Reexamination Certificate
2005-08-30
2005-08-30
Sample, David (Department: 1755)
Chemistry of inorganic compounds
Zeolite
Seed used
C423SDIG002, C423SDIG002, C423SDIG003
Reexamination Certificate
active
06936239
ABSTRACT:
Process for the preparation of doped pentasil-type zeolite, which process comprises the steps of:a) preparing an aqueous precursor mixture comprising a silicon source, an aluminum source, doped faujasite seeds, and another type of seeding material, andb) thermally treating the precursor mixture to form a doped pentasil-type zeolite.This process results in doped pentasil-type zeolites in a shorter crystallization time compared to prior art processes.
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patent: 0550917 (1993-07-01), None
Chemical Abstract of Chinese Patent No. 1,332114, dated Jun. 28, 2001, Wang, Xiqing, et al, “Optimal-Oridnted Growth of MFI-Type Zeolite Crystals”.
Chemical Abstract of Chinese Patent No. 1,187,460, dated Jul. 15, 1998, Wang, Dianzhong, et al, “Synthesis of Crystalline Silica-Based Molecular Sieves”.
Chemical Abstract of Chinese Patent No. 1052290, dated Nov. 30, 1989, Su, Xingtian, et al, “High-Silicon Rare Earth-Containing Zeolites Having Five-Member Ring Structure and Their Synthesis”.
International Search Report of corresponding PCT Application. No. PCT/EP03/09184, dated Nov. 27, 2003.
Chinese abstract 1058382, Jul. 23, 1990.
Akzo Novel NV
Morris Louis A.
Sample David
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