Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Organic compound containing
Patent
1990-04-20
1991-06-25
Garvin, Patrick P.
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Organic compound containing
528405, B01J 3104
Patent
active
050266764
ABSTRACT:
Zinc carboxylate catalysts for the copolymerization of carbon dioxide and epoxides are prepared by the reaction of zinc oxide with glutaric or adipic acid in an aprotic reaction solvent. Azeotropic distillation may be used to separate the water-solvent phase from the reaction mixture, or the catalyst may be separated from the reaction mixture by filtration and drying, generally without the need for repeated washings to remove active hydrogen atom sources. Examples of aprotic reaction solvents are toluene, dibutyl ether, anisole and ethyl benzoate.
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K. Soga, "Altimating Copolymerization of CO.sub.2 and Propylene Oxide with the Catalysts Prepared from Zn(011).sub.2 and Various Dicarboxylic Acids", Polymer Journal, vol. 13, No. 4, p. 407 (1981).
K. Soga, "Preparation of Catalysts for Use in Alternating Copolymerization Reactions of Propylene Oxide and Carbon Dioxide", Nippon Kagakkaishi, 2, 295 (1982).
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Motika Stephen A.
Pickering Timothy L.
Rokicki Andrzej
Stein Beatrice K.
Air Products and Chemicals Inc.
Arco Chemical Company
Garvin Patrick P.
Marsh William F.
Mitsui Petrochemical Industries Ltd.
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