Organic compounds -- part of the class 532-570 series – Organic compounds – Silicon containing
Reexamination Certificate
2008-07-29
2008-07-29
Barts, Samuel A (Department: 1621)
Organic compounds -- part of the class 532-570 series
Organic compounds
Silicon containing
Reexamination Certificate
active
10716427
ABSTRACT:
(A) An anionic surfactant, (B) a silicate monomer and (C) a basic silane are mixed in water or a mixed solvent of a water-miscible organic solvent and water to obtain a mesoporous silica complex having mesopores with a uniform size, the anionic surfactant Component (A) is removed by washing the resultant mesoporous silica complex with an acidic aqueous solution, a water-miscible organic solvent or an aqueous solution thereof to obtain a mesoporous silica outer shell utilizing the structure of the mesoporous silica complex as a template, and the mesoporous silica complex or the mesoporous silica outer shell is calcined to obtain a mesoporous silica. The mesoporous silica can be synthesized in this manner utilizing the anionic surfactant micelle with a remarkably low affinity to the silicate monomer.
REFERENCES:
patent: 5858457 (1999-01-01), Brinker et al.
Template-directed synthesis of bi-functionalized organo-MCM-41 and phenyl-MCM-48 silica mesophases Simon R. Hall, Christabel E. Fowler Benedicte Lebeau and Stephen Mann Chem. Commun., 1999,201-202.
Che Shunai
Sakamoto Kazutami
Tatsumi Takashi
Yokoi Toshiyuki
Yoshitake Hideaki
Ajinomoto Co. Inc.
Barts Samuel A
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