Solid catalyst useful for converting an alkylene oxide to an...

Details Solid catalyst useful for converting an alkylene oxide to an... Solid catalyst useful for converting an alkylene oxide to an...

2007-10-15

2011-11-08

Price, Elvis O (Department: 1621)

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

C568S727000, C568S728000, C502S159000

Reexamination Certificate

active

08053609

ABSTRACT:
A solid (i.e., heterogeneous) catalyst useful for preparing an alkylene glycol from the corresponding alkylene oxide as well as a process for the catalytic hydration of an alkylene oxide to an alkylene glycol utilizing such a catalyst are provided. The catalyst of the present invention is based on an ion exchange resin including polystyrene crosslinked with from about 2 to about 10 weight (wt.) % divinyl benzene. The ion exchange resin further includes quaternary ammonium groups or quaternary phosphonium groups. The process includes reacting water and an alkylene oxide in at least one reactor under conditions to form an alkylene glycol, wherein the at least one reactor includes a catalyst based on an ion exchange resin that includes polystyrene crosslinked with from about 2 to about 10 weight (wt.) % divinyl benzene.

REFERENCES:
patent: 6156942 (2000-12-01), Lemanski et al.
patent: 6730816 (2004-05-01), Lundquist
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patent: 2002726 (1992-05-01), None
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patent: WO9733850 (1997-09-01), None
Aldrich Catalog, 1992-1993; Catalog # 247669.
Aldrich Catalog, 1991-1993, Product detail for catalog No. 247669.

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