反应详情

In another embodiment of this invention, the present process represents an intermediate synthesis step in the conversion of acrolein to 1,4-butanediol. For example, a new and efficient method for producing 1,4-butanediol comprises (1) condensing 2-methyl-1,3-propanediol with acrolein to form 2-vinyl-5-methyl-1,3-dioxane, (2) converting the 2-vinyl-5-methyl-1,3-dioxane in accordance with the present invention hydroformylation method to a mixture of 2-(5'methyl-1',3'-dioxane)propionaldehyde and 3-(5'-methyl-1',3'-dioxane)-propionaldehyde, and (3) hydrogenating said mixture of propionaldehydes at a pH of about 7 to yield a mixture of 1,4-butanediol and 2-methyl-1,3-propanediol, and (4) separating the components of the diol mixture, and recycling the 2-methyl-1,3-propanediol to the first step of the process.