Agency of Industrial Science and Technology

Ikuei Ogata

Masato Tanaka

Teruyuki Hayashi

Yasuziro Kawabata

Yasujiro Kawabata

An improved hydroformylation process for preparing aldehydes by reacting olefins with synthesis gas (H.sub.2 and CO) under heating and pressure is disclosed. The hydroformylation is carried out in the presence of a platinum catalyst, and assistant composed of a halide of a metal of the group IVb of the Periodic Table and a reaction promotor composed of a specific bidentate ligand of the formula R.sub.2 X-Z-Y-Z-X-R'.sub.2. In this reaction, the platinum catalyst exerts a high activity, and an aldehyde mixture containing a linear isomer at a very high ratio of content is obtained as a product.

Catalyst system for hydroformylation of olefins

In catalytic hydroformylation of an olefin with hydrogen and carbon monoxide, when a platinum-phosphine complex is used as a catalyst and a compound of tin and an element of the group VIB of the Periodic Table is used as a promotor, condensation of the formed aldehyde as a side reaction is controlled and the intended aldehyde can be obtained in a high yield.

Process for preparation of aldehydes

An improved hydroformylation process for preparing aldehydes by reacting olefins with synthesis gas (H.sub.2 and CO) under heating and pressure is disclosed. The hydroformylation is carried out in the presence of a platinum catalyst, and assitant composed of a halide of a metal of the group IVb of the Periodic Table and a reaction promotor composed of a specific bidentate ligand of the formula R.sub.2 X--Z--Y--Z--X--R'.sub.2. In this reaction, the platinum catalyst exerts a high activity, and an aldehyde mixture containing a linear isomer at a very high ratio of content is obtained as a product.

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Tokyo, Japan

Ikuei Ogata