Organic compounds -- part of the class 532-570 series – Organic compounds – Carbohydrates or derivatives
Reexamination Certificate
2006-04-28
2010-06-29
Kiliman, Leszek (Department: 1787)
Organic compounds -- part of the class 532-570 series
Organic compounds
Carbohydrates or derivatives
C536S056000, C436S529000, C428S407000
Reexamination Certificate
active
07745616
ABSTRACT:
There is provided a process for producing beads for enantiomeric isomer resolution with a satisfactory separation efficiency. The beads for enantiomeric isomer resolution include a polysaccharide derivative, in which the polysaccharide derivative has a structure crosslinked at the 6-position hydroxy group of constituent units of the polysaccharide with a crosslinking agent. The process for producing the beads for enantiomeric isomer resolution includes: the step of adding dropwise an organic solvent solution of the polysaccharide derivative to a coagulation bath being stirred to thereby produce beads; the step of taking out the beads and then optionally drying the same after washing; and the step of reacting the beads with a crosslinking agent in an organic solvent to react at least part of the 6-position hydroxy groups in the constituent units of the polysaccharide with the crosslinking agent, thereby obtaining a reaction mixture containing beads having a crosslinked structure.
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Ikai Tomoyuki
Kamigaito Masami
Okamoto Yoshio
Yamamoto Chiyo
Daicel Chemical Industries Ltd.
Flynn ,Thiel, Boutell & Tanis, P.C.
Kiliman Leszek
National University Corporation Nagoya University
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