The Preparation of Dimer Aldehydes and Dimer Alcohols in an Oxo Reactor. I. Modifiers Effective in Producing Dimer Aldehydes and the Hydrogenation of the Aldehydes with Synthesis Gas

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概要

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• Among the modifiers which have been tested, magnesium compounds are the most effective in producing a great amount of dimer aldehydes in the course of the propylene hydroformylation. The addition does not result in any reduction of the hydroformylation rate at 150°C. A certain amount of C-4 aldehydes had already been dimerized in the presence of dicobalt octacarbonyl alone, but the amount of dimerized aldehydes is greatly increased by the further addition of magnesium compounds, the total amount exceeding the sum of the amounts obtainable in the presence of either one of them. Moreover, the addition of an organic base further increases the yield of dimer aldehydes to some extent.<BR>When starting with the raw material also containing iron pentacarbonyl, the hydrogenation of the aldehydes with the synthesis gas can be accomplished by the simple elevation of the temperature to 200°C. In the hydrogenation stage, iron pentacarbonyl does not behave as the catalyst for itself, but it contributes to the hydrogenation by suppressing, at that high temperature, the decomposition of the dicobalt octacarbonyl that is the real catalyst.

• 社団法人 日本化学会の論文

著者

• Uchida H.

  Government Chemical Industrial Research Institute

• Matsuda Akio

  Government Chemical Industrial Research Institute

関連論文

• Concentration and Temperature Profiles in a Tubular Reactor for Methanol Synthesis with an Outer-wall of Uniform Temperature. I. Profiles in a Reactor without a Heat Exchanger in a Catalyst Bed
• The Preparation of Dimer Aldehydes and Dimer Alcohols in an Oxo Reactor. I. Modifiers Effective in Producing Dimer Aldehydes and the Hydrogenation of the Aldehydes with Synthesis Gas

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