Kuraray Co., Ltd.

Kazuyuki Yada

Shigeaki Suzuki

Junichi Fuji

Masahiro Muranaka

Kenji Shimoyamada

Yutaka Suzuki

Kenichi Hino

Shigeru Okano

Keisuke Saeki

A process for producing a polyhydric alcohol includes a step (I) of hydrogenating hemiacetal having a specific structure to obtain a reaction solution (I), and a step (II) of adding water to the reaction solution (I) obtained in the step (I) and further conducting hydrogenation.

Process for producing polyhydric alcohol

Provided is a method for producing 3-methyl-1,5-pentanediol by hydrogenating 2-hydroxy-4-methyltetrahydropyran in the presence of a hydrogenation catalyst, characterized in that the hydrogenation is further carried out in the presence of a basic compound. By this method, in producing MPD by hydrogenation of MHP, high-purity MPD can be produced by effectively suppressing generation of by-products such as MPAE and MVL even when a known hydrogenation catalyst is used.

Method for producing 3-methyl-1,5-pentanediol

Phosphonium salts represented by the general formula (I) wherein Rand Reach represents a phenyl group which may be substituted by a lower alkyl group, Rrepresents a phenylene group which may be substituted by a lower alkyl group, Rand Reach represents a hydrogen atom or a hydrocarbon group having 1 to 12 carbon atoms which may be substituted and Rrepresents a hydrogen atom or a hydrocarbon group having 1 to 5 carbon atoms which may be substituted; processes for producing the same and uses for the same; phosphines providing the same, and processes for producing said phosphines.

Phosphonium salts and processes for production of and uses for the same, and phosphines deriving the same and processes for production of the phosphines

Polyalcohols are produced by a process comprising hydrogenating polyketones, which are copolymers of carbon monoxide and at least one olefin, in the presence of a catalyst and a solvent. The catalyst is prepared from a ruthenium-containing compound and a trialkylphosphine. The trialkylphosphine is represented by the general formula (I):

Growing community of inventors

Kamisu-machi, Japan

Kazuyuki Yada