申请人:KURARAY CO., LTD.
公开号:US20160052852A1
公开(公告)日:2016-02-25
Provided is an industrially advantageous method for producing a dialdehyde having a production ratio of linear dialdehydes to branched dialdehydes of 80/20 to 90/10, with an amount of rhodium to be used that is lower than that in the related art. Specifically, provided is a method for producing a dialdehyde, including reacting a linear olefinic compound having each of an ethylenic double bond and an aldehyde group on each end of the molecule with carbon monoxide and hydrogen, in the presence of a rhodium catalyst comprised of a bisphosphite represented by General Formula (I) and a rhodium compound, in which the reaction pressure of a mixed gas formed of carbon monoxide and hydrogen is decreased as the reaction proceeds, wherein R represents a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, and W represents an alkylene group having 1 to 20 carbon atoms, a cycloalkylene group having 5 to 18 carbon atoms, or an alkylene-arylene group having 7 to 11 carbon atoms, and a rhodium compound.
本发明提供了一种工业上有利的制备双醛的方法,其线性双醛与支链双醛的生产比为80/20到90/10,所需铑的量比相关技术低。具体而言,本发明提供了一种制备双醛的方法,包括在存在由一般式(I)表示的双膦酸酯和铑化合物组成的铑催化剂的条件下,将具有分子两端乙烯双键和醛基的线性烯烃化合物与一氧化碳和氢反应,其中反应压力随着反应的进行而降低,其中R代表氢原子、具有1至4个碳原子的烷基或具有1至4个碳原子的烷氧基,W代表具有1至20个碳原子的烷基、具有5至18个碳原子的环烷基或具有7至11个碳原子的烷基-芳基基团,以及铑化合物。