Porous silica microsphere scavengers

Chemistry of inorganic compounds – Silicon or compound thereof – Oxygen containing

Reexamination Certificate

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C502S408000, C210S656000

Reexamination Certificate

active

07128884

ABSTRACT:
Highly purified, porous silica microspheres contain functional groups which are capable of selectively binding to reaction impurities, such as excess reactant or reaction by-products, which are contained in a reaction medium. The reaction impurities can thereby be efficiently removed from the reaction medium, providing a convenient method for product purification.

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