Applications of homogeneous water-gas-shift reaction. II. The formation of dipropyl ketones as primary products from CO and H2O in the presence of an excess amount of propene. Cobalt-based catalytic hydrocarbonylation.
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概要
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The hydrocarbonylation of propene with CO and H<SUB>2</SUB>O to give dipropyl ketones occurs predominantly over forming C<SUB>4</SUB>-aldehydes; the catalyst solutions employed are prepared in situ from Co<SUB>2</SUB>(CO)<SUB>8</SUB>, various phosphines as ligands, and H<SUB>2</SUB>O, a high molar ratio of propene to Co<SUB>2</SUB>(CO)<SUB>8</SUB> of 300/2 being required. Of the several phosphorus ligands examined, 1,2-bis(diphenylphosphino) ethane (diphos) and bis(diphenylphosphino) acetylene are relatively effective for the formation of the ketones (abbreviated as [ketones]). The effects of the reaction variables (CO pressure, temperature, and H<SUB>2</SUB>O concentration) on [ketones] are also examined using the Co<SUB>2</SUB>(CO)<SUB>8</SUB>–diphos system; [ketones] increases with the initial increase in CO pressure, but reaches a maximum at <I>ca.</I> 100 kg/ cm<SUP>2</SUP> and decreases thereafter. Pronounced decreases of [ketones] are observed when pyridine as well as hydrogen is added to the catalyst solutions.
- 公益社団法人 日本化学会の論文
著者
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Murata Kazuhisa
National Inst. Advanced Industrial Sci. And Technol. Hiroshima Jpn
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Matsuda Akio
National Chemical Laboratory for Industry
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