Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Organic compound containing
Reexamination Certificate
2005-01-18
2005-01-18
Bell, Mark L. (Department: 1755)
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Organic compound containing
C502S151000, C502S170000, C558S260000, C558S277000, C525S453000, C525S394000, C528S405000
Reexamination Certificate
active
06844287
ABSTRACT:
The present invention provides a process for preparing supported zinc dicarboxylate catalysts with high activity for the copolymerization of carbon dioxide and epoxides by supporting zinc dicarboxylate on silica support. The zinc dicarboxylate may be synthesized from zinc oxide and dicarboxylic acid such as succinic acid, glutaric acid, adipic acid, pimelic acid and suberic acid. The silica support can be selected from the group consisting of aerosil, silica gel for chromatography or reagent grade silicon dioxide. The supporting process is performed in a planetary ball grinder under vacuum.
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Du Longchao
Li Xiuhua
Meng Yuezhong
Zhang Shizhen
Zhu Quan
Bell Mark L.
Brown Jennine M
Guangzhou Institute of Chemistry, Chinese Academy of Sciences
Kinney & Lange PA
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