A new catalyst for the low temperature oxo process with the characteristic of easy separation.
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概要
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A new type of catalyst, a cobalt carbonyl-complex has been found for homogeneous hydroformylation. The complex has been prepared from Co<SUB>2</SUB>(CO)<SUB>8</SUB> and the ethylene glycol diester of 3-(2-pyridyl)propionic acid as a ligand. The catalyst is active even at the low temperature of 50 °C and very low carbon monoxide pressure range of less than 1 kg/cm<SUP>2</SUP>. On subsequent cooling it separates from the reaction product. The ligand was prepared by the hydroesterification of 2-vinylpyridine with carbon monoxide and methanol (or ethanol), followed by the trans-esterification with ethylene glycol. The effect of the partial pressures of carbon monoxide and hydrogen on the product composition and on the recovery of the catalyst was examined. The catalytic activity of the new complex is considerably higher than that of Co<SUB>2</SUB>(CO)<SUB>8</SUB> at a lower temperature. The selectivity to linear aldehyde in the presence of new complex is significantly higher than in the presence of Co<SUB>2</SUB>(CO)<SUB>8</SUB> when the hydrogen to carbon monoxide ratio (H<SUB>2</SUB>/CO) in gas phase is high, but this difference in selectivity is small when the above gas ratio is normal. The new complex can be applied as catalyst for removal of carbon monoxide in hydrogen by means of oxo process.
- 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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Shin Shigemitsu
National Chemical Laboratory for Industry
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Nakayama Jun-ichi
National Chemical Laboratory for Industry
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Bando Ken-ichiro
National Chemical Laboratory for Industry
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Murata Kazuhisa
National Chemical Laboratory for Industry
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